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Cuaderno_2014_1_P | 2014 | psychology | 221 | Which were the first authors who investigated the role that stressful life events could have on health ?: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Mechanic"
},
{
"aid": 2,
"atext": "Matarazzo"
},
{
"aid": 3,
"atext": "Zola"
},
{
"aid": 4,
"atext": "Lazarus"
},
{
"aid": 5,
"atext": "Holmes and Rahe."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
Which were the first authors who investigated the role that stressful life events could have on health ?:
What is the correct answer?
- Mechanic
- Matarazzo
- Zola
- Lazarus
- Holmes and Rahe. | Holmes and Rahe. |
Cuaderno_2014_1_P | 2014 | psychology | 222 | With what scope is the Theory of the Melzack Gate and Wall related ?: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Cancer."
},
{
"aid": 2,
"atext": "HIV infection"
},
{
"aid": 3,
"atext": "Renal problems."
},
{
"aid": 4,
"atext": "Pain."
},
{
"aid": 5,
"atext": "Cardiovascular disorders"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
With what scope is the Theory of the Melzack Gate and Wall related ?:
What is the correct answer?
- Cancer.
- HIV infection
- Renal problems.
- Pain.
- Cardiovascular disorders | Pain. |
Cuaderno_2014_1_P | 2014 | psychology | 223 | For what illness has Moorey and Greer's Adjuvant Psychological Therapy been developed ?: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Fibromyalgia"
},
{
"aid": 2,
"atext": "Cancer."
},
{
"aid": 3,
"atext": "Irritable colon."
},
{
"aid": 4,
"atext": "Bronchial asthma."
},
{
"aid": 5,
"atext": "Hypertension."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
For what illness has Moorey and Greer's Adjuvant Psychological Therapy been developed ?:
What is the correct answer?
- Fibromyalgia
- Cancer.
- Irritable colon.
- Bronchial asthma.
- Hypertension. | Cancer. |
Cuaderno_2014_1_P | 2014 | psychology | 224 | What name do we give to the continuous increase of the caloric restriction that is required in the diet to continue losing weight ?: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Soil effect of the diets."
},
{
"aid": 2,
"atext": "Roof effect of the diets."
},
{
"aid": 3,
"atext": "Setpoint."
},
{
"aid": 4,
"atext": "Self-imposed maintenance."
},
{
"aid": 5,
"atext": "Effect of resistance."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
What name do we give to the continuous increase of the caloric restriction that is required in the diet to continue losing weight ?:
What is the correct answer?
- Soil effect of the diets.
- Roof effect of the diets.
- Setpoint.
- Self-imposed maintenance.
- Effect of resistance. | Soil effect of the diets. |
Cuaderno_2014_1_P | 2014 | psychology | 225 | What explanatory theoretical model of health behaviors emphasizes the importance of the perception of personal susceptibility to the disease and its severity ?: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Transheoretical model."
},
{
"aid": 2,
"atext": "Reasoned Action Model."
},
{
"aid": 3,
"atext": "Health Belief Model."
},
{
"aid": 4,
"atext": "PRECEDE-PROCEED model."
},
{
"aid": 5,
"atext": "Competition Model."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
What explanatory theoretical model of health behaviors emphasizes the importance of the perception of personal susceptibility to the disease and its severity ?:
What is the correct answer?
- Transheoretical model.
- Reasoned Action Model.
- Health Belief Model.
- PRECEDE-PROCEED model.
- Competition Model. | Health Belief Model. |
Cuaderno_2014_1_P | 2014 | psychology | 226 | The proportion of environmental variance due to the influences that a person receives from their family environment and that are shared by the rest of their family: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is the specific variance."
},
{
"aid": 2,
"atext": "It is called genotypic variance."
},
{
"aid": 3,
"atext": "It matches the heritability."
},
{
"aid": 4,
"atext": "It is dismissed in the investigations."
},
{
"aid": 5,
"atext": "It is the variance coming from the shared environment."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
The proportion of environmental variance due to the influences that a person receives from their family environment and that are shared by the rest of their family:
What is the correct answer?
- It is the specific variance.
- It is called genotypic variance.
- It matches the heritability.
- It is dismissed in the investigations.
- It is the variance coming from the shared environment. | It is the variance coming from the shared environment. |
Cuaderno_2014_1_P | 2014 | psychology | 227 | In a normal distribution: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The average of the scores is zero."
},
{
"aid": 2,
"atext": "The Standard Deviation is equal to the unit."
},
{
"aid": 3,
"atext": "The Average is equal to the Median."
},
{
"aid": 4,
"atext": "The Media does not have to coincide with the Median."
},
{
"aid": 5,
"atext": "You can not calculate Fashion."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
In a normal distribution:
What is the correct answer?
- The average of the scores is zero.
- The Standard Deviation is equal to the unit.
- The Average is equal to the Median.
- The Media does not have to coincide with the Median.
- You can not calculate Fashion. | The Average is equal to the Median. |
Cuaderno_2014_1_P | 2014 | psychology | 229 | When a person commits the "fundamental attribution error", he explains the behaviors that others perform based exclusively on: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The personal characteristics"
},
{
"aid": 2,
"atext": "The situation."
},
{
"aid": 3,
"atext": "The culture to which they belong."
},
{
"aid": 4,
"atext": "The socio-economic conditions."
},
{
"aid": 5,
"atext": "Chance"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
When a person commits the "fundamental attribution error", he explains the behaviors that others perform based exclusively on:
What is the correct answer?
- The personal characteristics
- The situation.
- The culture to which they belong.
- The socio-economic conditions.
- Chance | The personal characteristics |
Cuaderno_2014_1_P | 2014 | psychology | 230 | The gastrointestinal system releases a peptide hormone that increases during fasting and decreases after ingestion, called: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Leptin"
},
{
"aid": 2,
"atext": "Cholecystokinin"
},
{
"aid": 3,
"atext": "Ghrelin"
},
{
"aid": 4,
"atext": "Insulin."
},
{
"aid": 5,
"atext": "Glycogen"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
The gastrointestinal system releases a peptide hormone that increases during fasting and decreases after ingestion, called:
What is the correct answer?
- Leptin
- Cholecystokinin
- Ghrelin
- Insulin.
- Glycogen | Ghrelin |
Cuaderno_2014_1_P | 2014 | psychology | 231 | For classical automaticity theories, what characterizes automatic versus controlled processes ?: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The automatic processes are under control of the person's intentions."
},
{
"aid": 2,
"atext": "Automatic processes consume great attentional capacity."
},
{
"aid": 3,
"atext": "Automatic processes process information only sequentially."
},
{
"aid": 4,
"atext": "Automatic processes consume a lot of time."
},
{
"aid": 5,
"atext": "Automatic processes do not have to access conscious knowledge."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
For classical automaticity theories, what characterizes automatic versus controlled processes ?:
What is the correct answer?
- The automatic processes are under control of the person's intentions.
- Automatic processes consume great attentional capacity.
- Automatic processes process information only sequentially.
- Automatic processes consume a lot of time.
- Automatic processes do not have to access conscious knowledge. | Automatic processes do not have to access conscious knowledge. |
Cuaderno_2014_1_P | 2014 | psychology | 232 | The approach to the Psychological Evaluation from a constructivist model is characterized by the use of techniques: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Projectives that evaluate traits."
},
{
"aid": 2,
"atext": "Subjectives that evaluate meanings."
},
{
"aid": 3,
"atext": "Psychometrics that evaluate constructs."
},
{
"aid": 4,
"atext": "Behaviors that evaluate repertoires."
},
{
"aid": 5,
"atext": "Observationals that evaluate environmental variables."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
The approach to the Psychological Evaluation from a constructivist model is characterized by the use of techniques:
What is the correct answer?
- Projectives that evaluate traits.
- Subjectives that evaluate meanings.
- Psychometrics that evaluate constructs.
- Behaviors that evaluate repertoires.
- Observationals that evaluate environmental variables. | Subjectives that evaluate meanings. |
Cuaderno_2014_1_P | 2014 | psychology | 233 | Which of the following symptoms is characteristic of inattention in Attention Deficit Hyperactivity Disorder (ADHD)? : | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "They usually have difficulty organizing tasks and activities."
},
{
"aid": 2,
"atext": "They usually answer before ending the question."
},
{
"aid": 3,
"atext": "They usually have difficulty playing quietly."
},
{
"aid": 4,
"atext": "They are usually stirred in their seat."
},
{
"aid": 5,
"atext": "They usually interfere in the activities of others."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
Which of the following symptoms is characteristic of inattention in Attention Deficit Hyperactivity Disorder (ADHD)? :
What is the correct answer?
- They usually have difficulty organizing tasks and activities.
- They usually answer before ending the question.
- They usually have difficulty playing quietly.
- They are usually stirred in their seat.
- They usually interfere in the activities of others. | They usually have difficulty organizing tasks and activities. |
Cuaderno_2014_1_P | 2014 | psychology | 234 | According to the phenomenon of social facilitation when a person develops a task poorly learned in the presence of others, the execution of said task: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It improves slightly."
},
{
"aid": 2,
"atext": "It improves substantively."
},
{
"aid": 3,
"atext": "It does not change."
},
{
"aid": 4,
"atext": "Gets worse."
},
{
"aid": 5,
"atext": "It is not predictable."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
According to the phenomenon of social facilitation when a person develops a task poorly learned in the presence of others, the execution of said task:
What is the correct answer?
- It improves slightly.
- It improves substantively.
- It does not change.
- Gets worse.
- It is not predictable. | Gets worse. |
Cuaderno_2014_1_P | 2014 | psychology | 235 | The hormone that facilitates the reabsorption of water by the kidneys, whose absence causes loss of large amounts of water in the urine, is called: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Oxytocin"
},
{
"aid": 2,
"atext": "Vasopressin"
},
{
"aid": 3,
"atext": "Dopamine"
},
{
"aid": 4,
"atext": "Cholecystokinin"
},
{
"aid": 5,
"atext": "Glutamate."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about psychology:
The hormone that facilitates the reabsorption of water by the kidneys, whose absence causes loss of large amounts of water in the urine, is called:
What is the correct answer?
- Oxytocin
- Vasopressin
- Dopamine
- Cholecystokinin
- Glutamate. | Vasopressin |
Cuaderno_2014_1_Q | 2014 | chemistry | 1 | The complexes of cobalt (III): | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "They are all neutral or anionic."
},
{
"aid": 2,
"atext": "They form the basis of our knowledge about the properties and reaction mechanisms of octahedral complexes."
},
{
"aid": 3,
"atext": "They are usually flat-squares."
},
{
"aid": 4,
"atext": "They present very fast substitution kinetics."
},
{
"aid": 5,
"atext": "Almost all are prepared by replacing some ligands with others."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The complexes of cobalt (III):
What is the correct answer?
- They are all neutral or anionic.
- They form the basis of our knowledge about the properties and reaction mechanisms of octahedral complexes.
- They are usually flat-squares.
- They present very fast substitution kinetics.
- Almost all are prepared by replacing some ligands with others. | They form the basis of our knowledge about the properties and reaction mechanisms of octahedral complexes. |
Cuaderno_2014_1_Q | 2014 | chemistry | 2 | A homogeneous reaction between ideal gases that has reached chemical equilibrium can evolve (ie, move towards the formation of more reactants or products) in the following way if this equilibrium is altered: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "If the temperature is increased at constant pressure, it will go to where more moles will be produced."
},
{
"aid": 2,
"atext": "If the pressure is increased to constant temperature it will go to where the volume is higher."
},
{
"aid": 3,
"atext": "If an inert gas is added it will go to where this gas is consumed."
},
{
"aid": 4,
"atext": "If a gas that participates in the reaction is added, it will go to where more gas is produced."
},
{
"aid": 5,
"atext": "If the temperature is decreased, it will go to where the reaction is exothermic."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A homogeneous reaction between ideal gases that has reached chemical equilibrium can evolve (ie, move towards the formation of more reactants or products) in the following way if this equilibrium is altered:
What is the correct answer?
- If the temperature is increased at constant pressure, it will go to where more moles will be produced.
- If the pressure is increased to constant temperature it will go to where the volume is higher.
- If an inert gas is added it will go to where this gas is consumed.
- If a gas that participates in the reaction is added, it will go to where more gas is produced.
- If the temperature is decreased, it will go to where the reaction is exothermic. | If the temperature is decreased, it will go to where the reaction is exothermic. |
Cuaderno_2014_1_Q | 2014 | chemistry | 3 | When the manganese is oxidized in the air at 1000 ºC it is completely transformed into Mn3O4. This is because: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Mn3O4 is the most volatile of all manganese oxides."
},
{
"aid": 2,
"atext": "Mn3O4 can no longer react with oxygen."
},
{
"aid": 3,
"atext": "There are no manganese oxides with a higher oxidation state."
},
{
"aid": 4,
"atext": "Mn3O4 is the most stable of all manganese oxides."
},
{
"aid": 5,
"atext": "Mn3O4 forms a protective layer that stops oxidation of the metal."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
When the manganese is oxidized in the air at 1000 ºC it is completely transformed into Mn3O4. This is because:
What is the correct answer?
- Mn3O4 is the most volatile of all manganese oxides.
- Mn3O4 can no longer react with oxygen.
- There are no manganese oxides with a higher oxidation state.
- Mn3O4 is the most stable of all manganese oxides.
- Mn3O4 forms a protective layer that stops oxidation of the metal. | Mn3O4 is the most stable of all manganese oxides. |
Cuaderno_2014_1_Q | 2014 | chemistry | 4 | Comparing the redox behavior of the silver and sodium systems: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Na + is a good oxidant, because its system has a high reduction potential."
},
{
"aid": 2,
"atext": "Ag is an excellent oxidant, so it does not rust in the air."
},
{
"aid": 3,
"atext": "Ag + is a good oxidant, and therefore easily reducible to metal."
},
{
"aid": 4,
"atext": "The two metals dissolve in acid medium releasing H2"
},
{
"aid": 5,
"atext": "The two metals dismute spontaneously in water."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Comparing the redox behavior of the silver and sodium systems:
What is the correct answer?
- Na + is a good oxidant, because its system has a high reduction potential.
- Ag is an excellent oxidant, so it does not rust in the air.
- Ag + is a good oxidant, and therefore easily reducible to metal.
- The two metals dissolve in acid medium releasing H2
- The two metals dismute spontaneously in water. | Ag + is a good oxidant, and therefore easily reducible to metal. |
Cuaderno_2014_1_Q | 2014 | chemistry | 5 | Graphite: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It gives intercalation compounds with fluorine."
},
{
"aid": 2,
"atext": "Reacts with sodium to give a covalent compound with C ̶ Na bond."
},
{
"aid": 3,
"atext": "Reacts with sodium to give intercalation compounds that have the same distance between layers that pure graphite had."
},
{
"aid": 4,
"atext": "Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite."
},
{
"aid": 5,
"atext": "It gives covalent compounds with bromine with C ̶ Br bond."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Graphite:
What is the correct answer?
- It gives intercalation compounds with fluorine.
- Reacts with sodium to give a covalent compound with C ̶ Na bond.
- Reacts with sodium to give intercalation compounds that have the same distance between layers that pure graphite had.
- Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite.
- It gives covalent compounds with bromine with C ̶ Br bond. | Reacts with sodium to give intercalation compounds that are better electrical conductors than pure graphite. |
Cuaderno_2014_1_Q | 2014 | chemistry | 6 | By heating in electric furnaces of silica, calcium carbide and coal, calcium silicides are obtained. One of them: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It has the composition CaSi2."
},
{
"aid": 2,
"atext": "It does not react with water."
},
{
"aid": 3,
"atext": "Does not react with sulfuric acid."
},
{
"aid": 4,
"atext": "It is a powerful oxidizing agent."
},
{
"aid": 5,
"atext": "Its reaction with liquid water generates calcium silicate."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
By heating in electric furnaces of silica, calcium carbide and coal, calcium silicides are obtained. One of them:
What is the correct answer?
- It has the composition CaSi2.
- It does not react with water.
- Does not react with sulfuric acid.
- It is a powerful oxidizing agent.
- Its reaction with liquid water generates calcium silicate. | It has the composition CaSi2. |
Cuaderno_2014_1_Q | 2014 | chemistry | 7 | The change of internal energy when a mole of solid is formed from gaseous ions at infinite separation, at atmospheric pressure and at 0 K is called energy: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Deformation."
},
{
"aid": 2,
"atext": "Of sublimation."
},
{
"aid": 3,
"atext": "Reticular"
},
{
"aid": 4,
"atext": "Of condensation."
},
{
"aid": 5,
"atext": "Of liquefaction."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The change of internal energy when a mole of solid is formed from gaseous ions at infinite separation, at atmospheric pressure and at 0 K is called energy:
What is the correct answer?
- Deformation.
- Of sublimation.
- Reticular
- Of condensation.
- Of liquefaction. | Reticular |
Cuaderno_2014_1_Q | 2014 | chemistry | 8 | The term "uranium enrichment" refers to the increase in: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Amount of uranium present in a natural ore to be able to exploit it."
},
{
"aid": 2,
"atext": "Amount of the isotope 235U with respect to natural isotopic abundance."
},
{
"aid": 3,
"atext": "Amount of isotope 238U with respect to natural isotopic abundance."
},
{
"aid": 4,
"atext": "Capacity of uranium present in its fluoride."
},
{
"aid": 5,
"atext": "Atomic mass of uranium."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The term "uranium enrichment" refers to the increase in:
What is the correct answer?
- Amount of uranium present in a natural ore to be able to exploit it.
- Amount of the isotope 235U with respect to natural isotopic abundance.
- Amount of isotope 238U with respect to natural isotopic abundance.
- Capacity of uranium present in its fluoride.
- Atomic mass of uranium. | Amount of the isotope 235U with respect to natural isotopic abundance. |
Cuaderno_2014_1_Q | 2014 | chemistry | 9 | The Nernst equation: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is true both for reversible and highly irreversible galvanic cells."
},
{
"aid": 2,
"atext": "It allows to calculate the electromotive force of a galvanic cell with only knowing the Gibbs energy standard of the chemical reaction of the cell."
},
{
"aid": 3,
"atext": "It depends solely on the activities of the species that participate in the chemical reaction of the cell."
},
{
"aid": 4,
"atext": "It relates the electromotive force of the cell with the activities of the species that participate in the chemical reaction of the cell and with the standard potential of the reaction."
},
{
"aid": 5,
"atext": "It is independent of the number of electrons transferred in the electrochemical reaction of the cell"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The Nernst equation:
What is the correct answer?
- It is true both for reversible and highly irreversible galvanic cells.
- It allows to calculate the electromotive force of a galvanic cell with only knowing the Gibbs energy standard of the chemical reaction of the cell.
- It depends solely on the activities of the species that participate in the chemical reaction of the cell.
- It relates the electromotive force of the cell with the activities of the species that participate in the chemical reaction of the cell and with the standard potential of the reaction.
- It is independent of the number of electrons transferred in the electrochemical reaction of the cell | It relates the electromotive force of the cell with the activities of the species that participate in the chemical reaction of the cell and with the standard potential of the reaction. |
Cuaderno_2014_1_Q | 2014 | chemistry | 10 | A mixture of iron (III) chloride and potassium hexacyanoferrate (III) (potassium ferricyanide) is used to detect extremely small amounts of hydrogen peroxide in the water. The presence of H2O2 causes, after a short time, an intense dark blue color. This is because hydrogen peroxide: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It reduces hexacyanoferrate (III) to hexacyanoferrate (II)."
},
{
"aid": 2,
"atext": "Oxide to hexacyanoferrate (III)."
},
{
"aid": 3,
"atext": "Oxide to iron (III) chloride."
},
{
"aid": 4,
"atext": "Peroxo-cyano form complexes of Fe (III)."
},
{
"aid": 5,
"atext": "Oxidize cyanocomplexes to complex cyanate."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A mixture of iron (III) chloride and potassium hexacyanoferrate (III) (potassium ferricyanide) is used to detect extremely small amounts of hydrogen peroxide in the water. The presence of H2O2 causes, after a short time, an intense dark blue color. This is because hydrogen peroxide:
What is the correct answer?
- It reduces hexacyanoferrate (III) to hexacyanoferrate (II).
- Oxide to hexacyanoferrate (III).
- Oxide to iron (III) chloride.
- Peroxo-cyano form complexes of Fe (III).
- Oxidize cyanocomplexes to complex cyanate. | It reduces hexacyanoferrate (III) to hexacyanoferrate (II). |
Cuaderno_2014_1_Q | 2014 | chemistry | 11 | For the industrial production of tin, the ore is split: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Cinnabar."
},
{
"aid": 2,
"atext": "Blende."
},
{
"aid": 3,
"atext": "Wurtzita"
},
{
"aid": 4,
"atext": "Casiterita."
},
{
"aid": 5,
"atext": "Pyrite."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
For the industrial production of tin, the ore is split:
What is the correct answer?
- Cinnabar.
- Blende.
- Wurtzita
- Casiterita.
- Pyrite. | Casiterita. |
Cuaderno_2014_1_Q | 2014 | chemistry | 12 | The mechanism of a homogeneous chemical reaction: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It may include reaction intermediates that are not any of the reactants or any of the products."
},
{
"aid": 2,
"atext": "It is completely defined by the chemical reaction as long as it reflects the correct stoichiometry of the reaction."
},
{
"aid": 3,
"atext": "It is only defined for complex reactions in which the reactants go through many stages before becoming products."
},
{
"aid": 4,
"atext": "It is totally independent of the law of reaction speed."
},
{
"aid": 5,
"atext": "It does not depend on the temperature and is unique for the reaction between certain reagents."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The mechanism of a homogeneous chemical reaction:
What is the correct answer?
- It may include reaction intermediates that are not any of the reactants or any of the products.
- It is completely defined by the chemical reaction as long as it reflects the correct stoichiometry of the reaction.
- It is only defined for complex reactions in which the reactants go through many stages before becoming products.
- It is totally independent of the law of reaction speed.
- It does not depend on the temperature and is unique for the reaction between certain reagents. | It may include reaction intermediates that are not any of the reactants or any of the products. |
Cuaderno_2014_1_Q | 2014 | chemistry | 13 | The color centers or F centers are produced: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Exclusively in crystals that contain fluorine."
},
{
"aid": 2,
"atext": "By heating a crystal in the vapor of an alkali metal."
},
{
"aid": 3,
"atext": "By cooling a crystal in the vapor of an alkali metal."
},
{
"aid": 4,
"atext": "By heating a crystal in the presence of fluorine."
},
{
"aid": 5,
"atext": "By cooling a crystal in the presence of fluorine."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The color centers or F centers are produced:
What is the correct answer?
- Exclusively in crystals that contain fluorine.
- By heating a crystal in the vapor of an alkali metal.
- By cooling a crystal in the vapor of an alkali metal.
- By heating a crystal in the presence of fluorine.
- By cooling a crystal in the presence of fluorine. | By heating a crystal in the vapor of an alkali metal. |
Cuaderno_2014_1_Q | 2014 | chemistry | 14 | The "templates" used for the preparation of synthetic zeolites rich in silicon consist of: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Structures with tetrahedral holes."
},
{
"aid": 2,
"atext": "Structures with octahedral holes."
},
{
"aid": 3,
"atext": "Porous structures"
},
{
"aid": 4,
"atext": "Large structures without gaps."
},
{
"aid": 5,
"atext": "Large quaternary ammonium cations."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The "templates" used for the preparation of synthetic zeolites rich in silicon consist of:
What is the correct answer?
- Structures with tetrahedral holes.
- Structures with octahedral holes.
- Porous structures
- Large structures without gaps.
- Large quaternary ammonium cations. | Large quaternary ammonium cations. |
Cuaderno_2014_1_Q | 2014 | chemistry | 15 | By cooling rapidly to room temperature and tempering an ordinary (low carbon) steel in water, the structure known as: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Perlite"
},
{
"aid": 2,
"atext": "Spheroidite"
},
{
"aid": 3,
"atext": "Bainita"
},
{
"aid": 4,
"atext": "Ferrita."
},
{
"aid": 5,
"atext": "Martensita"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
By cooling rapidly to room temperature and tempering an ordinary (low carbon) steel in water, the structure known as:
What is the correct answer?
- Perlite
- Spheroidite
- Bainita
- Ferrita.
- Martensita | Martensita |
Cuaderno_2014_1_Q | 2014 | chemistry | 16 | The ceramic materials are: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Hard and fragile."
},
{
"aid": 2,
"atext": "Tenacious and ductile."
},
{
"aid": 3,
"atext": "Soft and malleable."
},
{
"aid": 4,
"atext": "Ductile and malleable."
},
{
"aid": 5,
"atext": "Soft and fragile"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The ceramic materials are:
What is the correct answer?
- Hard and fragile.
- Tenacious and ductile.
- Soft and malleable.
- Ductile and malleable.
- Soft and fragile | Hard and fragile. |
Cuaderno_2014_1_Q | 2014 | chemistry | 17 | The treatment consisting of keeping a material at an elevated temperature for a period of time and then cooling it slowly is called: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Normalized"
},
{
"aid": 2,
"atext": "Tempered."
},
{
"aid": 3,
"atext": "Annealing."
},
{
"aid": 4,
"atext": "Restored"
},
{
"aid": 5,
"atext": "Sintered"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The treatment consisting of keeping a material at an elevated temperature for a period of time and then cooling it slowly is called:
What is the correct answer?
- Normalized
- Tempered.
- Annealing.
- Restored
- Sintered | Annealing. |
Cuaderno_2014_1_Q | 2014 | chemistry | 18 | Calcium hydroxide: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is prepared by adding water to calcium oxide."
},
{
"aid": 2,
"atext": "It is a compound of intense red color."
},
{
"aid": 3,
"atext": "It crystallizes when heated."
},
{
"aid": 4,
"atext": "In solution it remains unchanged in air for months."
},
{
"aid": 5,
"atext": "It is used to paint after neutralizing with HCl."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Calcium hydroxide:
What is the correct answer?
- It is prepared by adding water to calcium oxide.
- It is a compound of intense red color.
- It crystallizes when heated.
- In solution it remains unchanged in air for months.
- It is used to paint after neutralizing with HCl. | It is prepared by adding water to calcium oxide. |
Cuaderno_2014_1_Q | 2014 | chemistry | 19 | The Arrhenius equation: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It relates the speed of a chemical reaction with the so-called constant velocity and with the concentrations of the reactants raised to their stoichiometric coefficients."
},
{
"aid": 2,
"atext": "It relates the constant of speed of a chemical reaction with the energy of activation of said reaction, so that if the energy, of activation is high the reaction is fast."
},
{
"aid": 3,
"atext": "It is only fulfilled for unimolecular reactions."
},
{
"aid": 4,
"atext": "It relates the speed constant to the temperature through the activation energy and the pre-exponential factor."
},
{
"aid": 5,
"atext": "It allows to obtain the activation energy of an elementary reaction by only representing the decimal logarithm of the temperature versus the inverse of the reaction time."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The Arrhenius equation:
What is the correct answer?
- It relates the speed of a chemical reaction with the so-called constant velocity and with the concentrations of the reactants raised to their stoichiometric coefficients.
- It relates the constant of speed of a chemical reaction with the energy of activation of said reaction, so that if the energy, of activation is high the reaction is fast.
- It is only fulfilled for unimolecular reactions.
- It relates the speed constant to the temperature through the activation energy and the pre-exponential factor.
- It allows to obtain the activation energy of an elementary reaction by only representing the decimal logarithm of the temperature versus the inverse of the reaction time. | It relates the speed constant to the temperature through the activation energy and the pre-exponential factor. |
Cuaderno_2014_1_Q | 2014 | chemistry | 20 | If metallic copper is added to a solution of iron (III) chloride, it produces: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "A precipitate of copper (II) chloride."
},
{
"aid": 2,
"atext": "A solution of copper (II) chloride and iron (II) chloride."
},
{
"aid": 3,
"atext": "A precipitate of iron (II) chloride."
},
{
"aid": 4,
"atext": "A precipitate of metallic iron."
},
{
"aid": 5,
"atext": "A solution of copper (I) chloride and iron (II) chloride."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
If metallic copper is added to a solution of iron (III) chloride, it produces:
What is the correct answer?
- A precipitate of copper (II) chloride.
- A solution of copper (II) chloride and iron (II) chloride.
- A precipitate of iron (II) chloride.
- A precipitate of metallic iron.
- A solution of copper (I) chloride and iron (II) chloride. | A solution of copper (II) chloride and iron (II) chloride. |
Cuaderno_2014_1_Q | 2014 | chemistry | 21 | The matrices of the composite materials can be: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Polymeric"
},
{
"aid": 2,
"atext": "Polymeric or metallic, but not ceramic."
},
{
"aid": 3,
"atext": "Polymeric or ceramic, but not metallic."
},
{
"aid": 4,
"atext": "Metallic or ceramic, but not polymeric."
},
{
"aid": 5,
"atext": "Polymeric or metallic or ceramic."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The matrices of the composite materials can be:
What is the correct answer?
- Polymeric
- Polymeric or metallic, but not ceramic.
- Polymeric or ceramic, but not metallic.
- Metallic or ceramic, but not polymeric.
- Polymeric or metallic or ceramic. | Polymeric or metallic or ceramic. |
Cuaderno_2014_1_Q | 2014 | chemistry | 22 | Calcium fluoride is a white solid that is found as such in nature (fluorspar or fluorite, which can occur in many colors) and is used as an important source of fluoride. Among its physical and chemical properties include: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Its solubility in water, which differentiates it from the other group 2 fluorides."
},
{
"aid": 2,
"atext": "Its resistance to concentrated sulfuric acid."
},
{
"aid": 3,
"atext": "Its hydrolysis in water, which transforms it into CaO and HF."
},
{
"aid": 4,
"atext": "Its relatively low melting point for a mineral."
},
{
"aid": 5,
"atext": "Its favorable, although slow, oxidation to the air."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Calcium fluoride is a white solid that is found as such in nature (fluorspar or fluorite, which can occur in many colors) and is used as an important source of fluoride. Among its physical and chemical properties include:
What is the correct answer?
- Its solubility in water, which differentiates it from the other group 2 fluorides.
- Its resistance to concentrated sulfuric acid.
- Its hydrolysis in water, which transforms it into CaO and HF.
- Its relatively low melting point for a mineral.
- Its favorable, although slow, oxidation to the air. | Its relatively low melting point for a mineral. |
Cuaderno_2014_1_Q | 2014 | chemistry | 23 | With respect to the distribution coefficient of a solute between two partially miscible liquids: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Because it is a quotient between solute concentrations in the two phases, it is independent of temperature."
},
{
"aid": 2,
"atext": "It does not depend on the total amount of solute in both parts."
},
{
"aid": 3,
"atext": "It is useful to determine the molar mass of the solute."
},
{
"aid": 4,
"atext": "If one phase is water and the other an organic solvent, it is usually used in medical and environmental chemistry to know the distribution of drugs and contaminants between these two types of media."
},
{
"aid": 5,
"atext": "It only has physical significance when the liquid phases are in contact through a semipermeable membrane."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
With respect to the distribution coefficient of a solute between two partially miscible liquids:
What is the correct answer?
- Because it is a quotient between solute concentrations in the two phases, it is independent of temperature.
- It does not depend on the total amount of solute in both parts.
- It is useful to determine the molar mass of the solute.
- If one phase is water and the other an organic solvent, it is usually used in medical and environmental chemistry to know the distribution of drugs and contaminants between these two types of media.
- It only has physical significance when the liquid phases are in contact through a semipermeable membrane. | If one phase is water and the other an organic solvent, it is usually used in medical and environmental chemistry to know the distribution of drugs and contaminants between these two types of media. |
Cuaderno_2014_1_Q | 2014 | chemistry | 24 | Osmium oxide (VIII), OsO4: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is a compound in a state of oxidation very common among transition metals."
},
{
"aid": 2,
"atext": "It is the only binary compound of osmium with oxygen."
},
{
"aid": 3,
"atext": "It has the structure of rhenium trioxide."
},
{
"aid": 4,
"atext": "It is inert compared to alkaline hydroxides."
},
{
"aid": 5,
"atext": "It is used as an oxidant in organic chemistry."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Osmium oxide (VIII), OsO4:
What is the correct answer?
- It is a compound in a state of oxidation very common among transition metals.
- It is the only binary compound of osmium with oxygen.
- It has the structure of rhenium trioxide.
- It is inert compared to alkaline hydroxides.
- It is used as an oxidant in organic chemistry. | It is used as an oxidant in organic chemistry. |
Cuaderno_2014_1_Q | 2014 | chemistry | 25 | In relation to the colligative properties of a solution it can be said that: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "They have their origin in the decrease of the chemical potential of the solvent by the fact of adding a solute."
},
{
"aid": 2,
"atext": "The decrease in the vapor pressure of the solvent to which a non-volatile solute is added is directly proportional to the mole fraction of the solvent."
},
{
"aid": 3,
"atext": "The addition of a solute to a solvent causes the range of temperatures in which the solution is maintained in the liquid state to be lower than that corresponding to the pure solvent."
},
{
"aid": 4,
"atext": "The molal constant of descent of the freezing point depends on the nature of the dissolved solute."
},
{
"aid": 5,
"atext": "Cryoscopic descent is a technique applicable to the determination of the molar mass of the solvent."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In relation to the colligative properties of a solution it can be said that:
What is the correct answer?
- They have their origin in the decrease of the chemical potential of the solvent by the fact of adding a solute.
- The decrease in the vapor pressure of the solvent to which a non-volatile solute is added is directly proportional to the mole fraction of the solvent.
- The addition of a solute to a solvent causes the range of temperatures in which the solution is maintained in the liquid state to be lower than that corresponding to the pure solvent.
- The molal constant of descent of the freezing point depends on the nature of the dissolved solute.
- Cryoscopic descent is a technique applicable to the determination of the molar mass of the solvent. | They have their origin in the decrease of the chemical potential of the solvent by the fact of adding a solute. |
Cuaderno_2014_1_Q | 2014 | chemistry | 26 | The SO2 molecule is: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Linear, with the S atom in the center."
},
{
"aid": 2,
"atext": "Linear, with one of the atoms of O in the center."
},
{
"aid": 3,
"atext": "Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons."
},
{
"aid": 4,
"atext": "Angular, with one of the atoms of O in the center and with an angle of approximately 120º (equilateral triangle) and a pair of free electrons."
},
{
"aid": 5,
"atext": "Angular, with the S atom in the center and with an angle close to 109º (tetrahedron) and two pairs of free electrons."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The SO2 molecule is:
What is the correct answer?
- Linear, with the S atom in the center.
- Linear, with one of the atoms of O in the center.
- Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons.
- Angular, with one of the atoms of O in the center and with an angle of approximately 120º (equilateral triangle) and a pair of free electrons.
- Angular, with the S atom in the center and with an angle close to 109º (tetrahedron) and two pairs of free electrons. | Angular, with the S atom in the center and with an angle close to 120º (equilateral triangle) and a free pair of electrons. |
Cuaderno_2014_1_Q | 2014 | chemistry | 27 | Gallium is the element that is under the aluminum in group 13 of the periodic table. Thus: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It burns in oxygen giving Ga2O."
},
{
"aid": 2,
"atext": "It is stable to air due to a protective oxide layer."
},
{
"aid": 3,
"atext": "It dissolves very quickly in nitric acid."
},
{
"aid": 4,
"atext": "It is not soluble in basic water with hydrogen evolution."
},
{
"aid": 5,
"atext": "It has a melting point a little higher than aluminum."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Gallium is the element that is under the aluminum in group 13 of the periodic table. Thus:
What is the correct answer?
- It burns in oxygen giving Ga2O.
- It is stable to air due to a protective oxide layer.
- It dissolves very quickly in nitric acid.
- It is not soluble in basic water with hydrogen evolution.
- It has a melting point a little higher than aluminum. | It is stable to air due to a protective oxide layer. |
Cuaderno_2014_1_Q | 2014 | chemistry | 28 | An isolated carbon atom is: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Diamagnetic"
},
{
"aid": 2,
"atext": "Ferromagnetic."
},
{
"aid": 3,
"atext": "Paramagnetic, with an unpaired electron."
},
{
"aid": 4,
"atext": "Paramagnetic, with two unpaired electrons."
},
{
"aid": 5,
"atext": "Paramagnetic, with three unpaired electrons."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
An isolated carbon atom is:
What is the correct answer?
- Diamagnetic
- Ferromagnetic.
- Paramagnetic, with an unpaired electron.
- Paramagnetic, with two unpaired electrons.
- Paramagnetic, with three unpaired electrons. | Paramagnetic, with two unpaired electrons. |
Cuaderno_2014_1_Q | 2014 | chemistry | 29 | If we try to dissolve ammonia in water we observe that: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is completely soluble."
},
{
"aid": 2,
"atext": "It is not very soluble."
},
{
"aid": 3,
"atext": "It should be poorly soluble, but the solubility increases markedly by acid-base reaction between them, resulting in an acid solution."
},
{
"aid": 4,
"atext": "It should be poorly soluble, but the solubility increases markedly by redox reaction between them, releasing hydrogen."
},
{
"aid": 5,
"atext": "It is very soluble, favored by the formation of hydrogen bonds between the two compounds."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
If we try to dissolve ammonia in water we observe that:
What is the correct answer?
- It is completely soluble.
- It is not very soluble.
- It should be poorly soluble, but the solubility increases markedly by acid-base reaction between them, resulting in an acid solution.
- It should be poorly soluble, but the solubility increases markedly by redox reaction between them, releasing hydrogen.
- It is very soluble, favored by the formation of hydrogen bonds between the two compounds. | It is very soluble, favored by the formation of hydrogen bonds between the two compounds. |
Cuaderno_2014_1_Q | 2014 | chemistry | 30 | Among the partial reactions that lead to sodium carbonate by the Solvay Process, are: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The reaction between calcium carbonate and sodium chloride."
},
{
"aid": 2,
"atext": "The precipitation of sodium hydrogen carbonate."
},
{
"aid": 3,
"atext": "The thermal decomposition of ammonium chloride."
},
{
"aid": 4,
"atext": "The formation of CaCO3 from CaO and CO2."
},
{
"aid": 5,
"atext": "The reaction of ammonia with calcium oxide."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Among the partial reactions that lead to sodium carbonate by the Solvay Process, are:
What is the correct answer?
- The reaction between calcium carbonate and sodium chloride.
- The precipitation of sodium hydrogen carbonate.
- The thermal decomposition of ammonium chloride.
- The formation of CaCO3 from CaO and CO2.
- The reaction of ammonia with calcium oxide. | The precipitation of sodium hydrogen carbonate. |
Cuaderno_2014_1_Q | 2014 | chemistry | 31 | Van Deemter's velocity equation tries to justify the contributions of the different effects that cause the widening of the chromatographic band, which are basically of four types: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Eddy diffusion, dead volume and resistance to convection in both phases, mobile and stationary."
},
{
"aid": 2,
"atext": "Length of the chromatographic column, longitudinal diffusion in axial and radical direction, and Joule effect."
},
{
"aid": 3,
"atext": "Kinematic viscosity of the mobile phase, mass transport between the mobile phase and the stationary phase, transversal and longitudinal diffusion."
},
{
"aid": 4,
"atext": "Effect of mass transfer in the stationary phase, in the mobile phase, Eddy diffusion and longitudinal molecular diffusion."
},
{
"aid": 5,
"atext": "Molecular diffusion in axial direction, radical atomic diffusion, internal pressure of the column and viscosity of the mobile phase."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Van Deemter's velocity equation tries to justify the contributions of the different effects that cause the widening of the chromatographic band, which are basically of four types:
What is the correct answer?
- Eddy diffusion, dead volume and resistance to convection in both phases, mobile and stationary.
- Length of the chromatographic column, longitudinal diffusion in axial and radical direction, and Joule effect.
- Kinematic viscosity of the mobile phase, mass transport between the mobile phase and the stationary phase, transversal and longitudinal diffusion.
- Effect of mass transfer in the stationary phase, in the mobile phase, Eddy diffusion and longitudinal molecular diffusion.
- Molecular diffusion in axial direction, radical atomic diffusion, internal pressure of the column and viscosity of the mobile phase. | Effect of mass transfer in the stationary phase, in the mobile phase, Eddy diffusion and longitudinal molecular diffusion. |
Cuaderno_2014_1_Q | 2014 | chemistry | 32 | Polarography is an analytical technique that refers to: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The absorption of electromagnetic radiation."
},
{
"aid": 2,
"atext": "The emission of electromagnetic radiation."
},
{
"aid": 3,
"atext": "The voltametry with mercury electrode."
},
{
"aid": 4,
"atext": "The use of palladium as a reference electrode."
},
{
"aid": 5,
"atext": "To the potential of asymmetry."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Polarography is an analytical technique that refers to:
What is the correct answer?
- The absorption of electromagnetic radiation.
- The emission of electromagnetic radiation.
- The voltametry with mercury electrode.
- The use of palladium as a reference electrode.
- To the potential of asymmetry. | The voltametry with mercury electrode. |
Cuaderno_2014_1_Q | 2014 | chemistry | 33 | Plasma ICP is more suitable for rapid multielemental analysis than flame atomic absorption methods because: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The linearity interval is not wide, which allows for very sensitive analyzes."
},
{
"aid": 2,
"atext": "The ICP has several possibilities to introduce the sample using different types of nebulizers."
},
{
"aid": 3,
"atext": "They use two photomultiplier tubes, one for the ultraviolet region and the other for the visible one."
},
{
"aid": 4,
"atext": "It has load-coupled silicon solid-state detectors that allow simultaneous monitoring of a large number of lines, reducing analysis time, sample volume and improving detection limits."
},
{
"aid": 5,
"atext": "It is not correct, because with the ICP plasma, multielemental analysis can not be done."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Plasma ICP is more suitable for rapid multielemental analysis than flame atomic absorption methods because:
What is the correct answer?
- The linearity interval is not wide, which allows for very sensitive analyzes.
- The ICP has several possibilities to introduce the sample using different types of nebulizers.
- They use two photomultiplier tubes, one for the ultraviolet region and the other for the visible one.
- It has load-coupled silicon solid-state detectors that allow simultaneous monitoring of a large number of lines, reducing analysis time, sample volume and improving detection limits.
- It is not correct, because with the ICP plasma, multielemental analysis can not be done. | It has load-coupled silicon solid-state detectors that allow simultaneous monitoring of a large number of lines, reducing analysis time, sample volume and improving detection limits. |
Cuaderno_2014_1_Q | 2014 | chemistry | 34 | Liquid chromatography in normal phase: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It uses a column with apolar groups that interact with the apolar part of the analytes differentially."
},
{
"aid": 2,
"atext": "It is a mode of operation that employs a polar stationary phase with a low polarity mobile phase."
},
{
"aid": 3,
"atext": "It uses highly polar mobile phases such as alkanes or chloroalkanes."
},
{
"aid": 4,
"atext": "It is a mode of operation that employs a non-polar surface with a mixed aqueous / organic mobile phase."
},
{
"aid": 5,
"atext": "It uses stationary phases with a large number of hydrophobic alkyl ligands."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Liquid chromatography in normal phase:
What is the correct answer?
- It uses a column with apolar groups that interact with the apolar part of the analytes differentially.
- It is a mode of operation that employs a polar stationary phase with a low polarity mobile phase.
- It uses highly polar mobile phases such as alkanes or chloroalkanes.
- It is a mode of operation that employs a non-polar surface with a mixed aqueous / organic mobile phase.
- It uses stationary phases with a large number of hydrophobic alkyl ligands. | It is a mode of operation that employs a polar stationary phase with a low polarity mobile phase. |
Cuaderno_2014_1_Q | 2014 | chemistry | 35 | Every experimental measurement is accompanied by the corresponding experimental error. Experimental errors are classified as systematic and random. On these last ones it is possible to be affirmed that: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "They are due to a failure of the experiment or the equipment."
},
{
"aid": 2,
"atext": "They generally cause a positive deviation from the measurement."
},
{
"aid": 3,
"atext": "They are equally likely to be positive or negative."
},
{
"aid": 4,
"atext": "They do not affect the final result because they are random."
},
{
"aid": 5,
"atext": "They affect exclusively the accuracy of the results obtained."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Every experimental measurement is accompanied by the corresponding experimental error. Experimental errors are classified as systematic and random. On these last ones it is possible to be affirmed that:
What is the correct answer?
- They are due to a failure of the experiment or the equipment.
- They generally cause a positive deviation from the measurement.
- They are equally likely to be positive or negative.
- They do not affect the final result because they are random.
- They affect exclusively the accuracy of the results obtained. | They are equally likely to be positive or negative. |
Cuaderno_2014_1_Q | 2014 | chemistry | 36 | The ionization source known as Inductive Coupling Plasma used in Elemental Mass Spectrometry, is characterized by: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Generate mostly monatomic ions."
},
{
"aid": 2,
"atext": "Fragment the organic molecules in molecular ions that allow their identification."
},
{
"aid": 3,
"atext": "Be a low energy source."
},
{
"aid": 4,
"atext": "Run at high vacuum."
},
{
"aid": 5,
"atext": "Reach detection limits of the order of mg L-1 for most elements."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The ionization source known as Inductive Coupling Plasma used in Elemental Mass Spectrometry, is characterized by:
What is the correct answer?
- Generate mostly monatomic ions.
- Fragment the organic molecules in molecular ions that allow their identification.
- Be a low energy source.
- Run at high vacuum.
- Reach detection limits of the order of mg L-1 for most elements. | Generate mostly monatomic ions. |
Cuaderno_2014_1_Q | 2014 | chemistry | 37 | In gas chromatography, derivatization is very common, with several objectives. One of those discussed below is not among them: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Increase the volatility of non-volatile compounds."
},
{
"aid": 2,
"atext": "Avoid the decomposition of a compound, improving its stability."
},
{
"aid": 3,
"atext": "Reduce the absorption on active surfaces of the walls of the column and the solid support."
},
{
"aid": 4,
"atext": "Fragment the analyte in molecular ions of easier separation."
},
{
"aid": 5,
"atext": "Improve the separation of closely related compounds with a very poor separation."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In gas chromatography, derivatization is very common, with several objectives. One of those discussed below is not among them:
What is the correct answer?
- Increase the volatility of non-volatile compounds.
- Avoid the decomposition of a compound, improving its stability.
- Reduce the absorption on active surfaces of the walls of the column and the solid support.
- Fragment the analyte in molecular ions of easier separation.
- Improve the separation of closely related compounds with a very poor separation. | Fragment the analyte in molecular ions of easier separation. |
Cuaderno_2014_1_Q | 2014 | chemistry | 38 | It is UV visible molecular absorption spectroscopy is called isosbestic point a: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The region of the spectrum where two species have the same radiation emission capacity."
},
{
"aid": 2,
"atext": "The pH at which two absorbing species have the same molecular absorption coefficient."
},
{
"aid": 3,
"atext": "The temperature at which two absorbing species in equilibrium stop emitting radiation."
},
{
"aid": 4,
"atext": "The wavelength at which two absorbing species in equilibrium has the same refractive index."
},
{
"aid": 5,
"atext": "The wavelength at which the molecular absorption coefficients of two absorbent species in equilibrium, interconvertible to each other, are equivalent."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
It is UV visible molecular absorption spectroscopy is called isosbestic point a:
What is the correct answer?
- The region of the spectrum where two species have the same radiation emission capacity.
- The pH at which two absorbing species have the same molecular absorption coefficient.
- The temperature at which two absorbing species in equilibrium stop emitting radiation.
- The wavelength at which two absorbing species in equilibrium has the same refractive index.
- The wavelength at which the molecular absorption coefficients of two absorbent species in equilibrium, interconvertible to each other, are equivalent. | The wavelength at which the molecular absorption coefficients of two absorbent species in equilibrium, interconvertible to each other, are equivalent. |
Cuaderno_2014_1_Q | 2014 | chemistry | 39 | The solubility of copper hydroxide in the presence of a high concentration of ammonia: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Increased by formation of a complex ion of Cu2 + with NH3."
},
{
"aid": 2,
"atext": "It is not affected because there is no common ion effect."
},
{
"aid": 3,
"atext": "Decreases by common ion effect."
},
{
"aid": 4,
"atext": "It decreases upon oxidation of bromide to molecular bromine."
},
{
"aid": 5,
"atext": "It decreases because the hydroxides are more soluble in acidic medium."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The solubility of copper hydroxide in the presence of a high concentration of ammonia:
What is the correct answer?
- Increased by formation of a complex ion of Cu2 + with NH3.
- It is not affected because there is no common ion effect.
- Decreases by common ion effect.
- It decreases upon oxidation of bromide to molecular bromine.
- It decreases because the hydroxides are more soluble in acidic medium. | Increased by formation of a complex ion of Cu2 + with NH3. |
Cuaderno_2014_1_Q | 2014 | chemistry | 40 | In HPLC and under ideal conditions, the chromatographic peaks should have the shape of Gaussian peaks with perfect symmetry, although in reality, the peaks are not perfectly symmetrical and can present fronts and tails. The asymmetry factor: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is used to measure the relative retention of the two components of a sample so that in perfectly symmetrical compounds it is 0."
},
{
"aid": 2,
"atext": "It is used to measure the degree of symmetry of a peak and is defined at the peak width corresponding to 10% of the peak height."
},
{
"aid": 3,
"atext": "It is a parameter that is calculated by measuring the width at the half-height of the chromatographic peak."
},
{
"aid": 4,
"atext": "It relates to each other two successive chromatographic peaks, so that an asymmetry factor 1 indicates a total resolution of them."
},
{
"aid": 5,
"atext": "It is a parameter related to the symmetry of the peaks, defined at a height equal to 10% of the width thereof."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In HPLC and under ideal conditions, the chromatographic peaks should have the shape of Gaussian peaks with perfect symmetry, although in reality, the peaks are not perfectly symmetrical and can present fronts and tails. The asymmetry factor:
What is the correct answer?
- It is used to measure the relative retention of the two components of a sample so that in perfectly symmetrical compounds it is 0.
- It is used to measure the degree of symmetry of a peak and is defined at the peak width corresponding to 10% of the peak height.
- It is a parameter that is calculated by measuring the width at the half-height of the chromatographic peak.
- It relates to each other two successive chromatographic peaks, so that an asymmetry factor 1 indicates a total resolution of them.
- It is a parameter related to the symmetry of the peaks, defined at a height equal to 10% of the width thereof. | It is used to measure the degree of symmetry of a peak and is defined at the peak width corresponding to 10% of the peak height. |
Cuaderno_2014_1_Q | 2014 | chemistry | 41 | A calomel electrode: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is a mercury indicator electrode."
},
{
"aid": 2,
"atext": "It is a reference electrode that contains nitrate ions."
},
{
"aid": 3,
"atext": "It is an indicator electrode for nitrate ions."
},
{
"aid": 4,
"atext": "It is a reference electrode that uses silver and silver chloride."
},
{
"aid": 5,
"atext": "It is a reference electrode that contains a saturated solution of mercury chloride (I)."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A calomel electrode:
What is the correct answer?
- It is a mercury indicator electrode.
- It is a reference electrode that contains nitrate ions.
- It is an indicator electrode for nitrate ions.
- It is a reference electrode that uses silver and silver chloride.
- It is a reference electrode that contains a saturated solution of mercury chloride (I). | It is a reference electrode that contains a saturated solution of mercury chloride (I). |
Cuaderno_2014_1_Q | 2014 | chemistry | 42 | In atomic fluorescence, the emission of electromagnetic radiation called resonance florescence occurs when the excitation wavelength is: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "100 nm higher than the emission wavelength."
},
{
"aid": 2,
"atext": "100 nm lower than the emission wavelength."
},
{
"aid": 3,
"atext": "Same as the emission wavelength."
},
{
"aid": 4,
"atext": "100 nm greater than the excitation wavelength."
},
{
"aid": 5,
"atext": "100 nm less than the excitation wavelength."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In atomic fluorescence, the emission of electromagnetic radiation called resonance florescence occurs when the excitation wavelength is:
What is the correct answer?
- 100 nm higher than the emission wavelength.
- 100 nm lower than the emission wavelength.
- Same as the emission wavelength.
- 100 nm greater than the excitation wavelength.
- 100 nm less than the excitation wavelength. | Same as the emission wavelength. |
Cuaderno_2014_1_Q | 2014 | chemistry | 43 | The molar absorption coefficient of a compound: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It has dimensions of M-1 cm-1, it is constant at a specific wavelength and in a particular solvent."
},
{
"aid": 2,
"atext": "Its dimensions are mol L-1 cm-2 and it is constant at a given wavelength and in a given solvent."
},
{
"aid": 3,
"atext": "It has dimensions L mol-1 cm-3 and is constant throughout the spectral region and is not influenced by the solvent."
},
{
"aid": 4,
"atext": "Its dimensions are Photons per mole and it varies with the wavelength and with the solvent."
},
{
"aid": 5,
"atext": "It is dimensionless, constant and does not vary with the wavelength or with the solvent."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The molar absorption coefficient of a compound:
What is the correct answer?
- It has dimensions of M-1 cm-1, it is constant at a specific wavelength and in a particular solvent.
- Its dimensions are mol L-1 cm-2 and it is constant at a given wavelength and in a given solvent.
- It has dimensions L mol-1 cm-3 and is constant throughout the spectral region and is not influenced by the solvent.
- Its dimensions are Photons per mole and it varies with the wavelength and with the solvent.
- It is dimensionless, constant and does not vary with the wavelength or with the solvent. | It has dimensions of M-1 cm-1, it is constant at a specific wavelength and in a particular solvent. |
Cuaderno_2014_1_Q | 2014 | chemistry | 44 | Capillary isotachophoresis (CITP) separates: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Cations but can not separate anions."
},
{
"aid": 2,
"atext": "Anions but can not separate cations."
},
{
"aid": 3,
"atext": "Cations and anions simultaneously."
},
{
"aid": 4,
"atext": "Cations and anions but not simultaneously."
},
{
"aid": 5,
"atext": "Only neutral molecules."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Capillary isotachophoresis (CITP) separates:
What is the correct answer?
- Cations but can not separate anions.
- Anions but can not separate cations.
- Cations and anions simultaneously.
- Cations and anions but not simultaneously.
- Only neutral molecules. | Cations and anions but not simultaneously. |
Cuaderno_2014_1_Q | 2014 | chemistry | 45 | Could a glass electrode be used as a reference electrode ?: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Yes, if the glass electrode is a combined electrode."
},
{
"aid": 2,
"atext": "Yes, if a mercury electrode is used as the indicator electrode."
},
{
"aid": 3,
"atext": "No, since the glass electrode is a selective electrode."
},
{
"aid": 4,
"atext": "No, because its foundation is not Nerstian."
},
{
"aid": 5,
"atext": "Yes, if the determination is made in a buffered medium."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Could a glass electrode be used as a reference electrode ?:
What is the correct answer?
- Yes, if the glass electrode is a combined electrode.
- Yes, if a mercury electrode is used as the indicator electrode.
- No, since the glass electrode is a selective electrode.
- No, because its foundation is not Nerstian.
- Yes, if the determination is made in a buffered medium. | Yes, if the determination is made in a buffered medium. |
Cuaderno_2014_1_Q | 2014 | chemistry | 46 | In the analysis of arsenic by graphite chamber losses of said element can be produced by volatilization during the carbonization stage. This fact can be minimized if: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "We raise the temperature during the carbonization stage."
},
{
"aid": 2,
"atext": "We increase the carbonization time."
},
{
"aid": 3,
"atext": "We add matrix modifiers that thermally stabilize the analyte."
},
{
"aid": 4,
"atext": "We lower the temperature during the carbonization stage."
},
{
"aid": 5,
"atext": "We modified the drying program to completely vaporize the solvent."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the analysis of arsenic by graphite chamber losses of said element can be produced by volatilization during the carbonization stage. This fact can be minimized if:
What is the correct answer?
- We raise the temperature during the carbonization stage.
- We increase the carbonization time.
- We add matrix modifiers that thermally stabilize the analyte.
- We lower the temperature during the carbonization stage.
- We modified the drying program to completely vaporize the solvent. | We add matrix modifiers that thermally stabilize the analyte. |
Cuaderno_2014_1_Q | 2014 | chemistry | 47 | If we value 25 mL of an H2A acid in concentration 0.1000M (pKa1 = 5, pKa2 = 9) with NaOH, the pH when we have evaluated 50% of the initial acid will be: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "one."
},
{
"aid": 2,
"atext": "3."
},
{
"aid": 3,
"atext": "5."
},
{
"aid": 4,
"atext": "7"
},
{
"aid": 5,
"atext": "9"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
If we value 25 mL of an H2A acid in concentration 0.1000M (pKa1 = 5, pKa2 = 9) with NaOH, the pH when we have evaluated 50% of the initial acid will be:
What is the correct answer?
- one.
- 3.
- 5.
- 7
- 9 | 5. |
Cuaderno_2014_1_Q | 2014 | chemistry | 48 | An injection mode widely used in gas chromatography is the injection with split flow or "Split", in which: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The sample introduced through the septum vaporizes abruptly and is carried by the carrier gas towards the column."
},
{
"aid": 2,
"atext": "The flow divider is closed, the sample is introduced, and it is reopened after a controlled period of time of the order of 15 to 60 s."
},
{
"aid": 3,
"atext": "The solvent condenses at the entrance to the column forming a mixed phase of high thickness when the divider is closed."
},
{
"aid": 4,
"atext": "The carrier gas that carries the sample, once evaporated, is divided into two parts: one passes to the column and the other is sent abroad."
},
{
"aid": 5,
"atext": "The sample is introduced cold and a part is deposited on a filling and heated quickly to produce homogeneous evaporation of the solution."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
An injection mode widely used in gas chromatography is the injection with split flow or "Split", in which:
What is the correct answer?
- The sample introduced through the septum vaporizes abruptly and is carried by the carrier gas towards the column.
- The flow divider is closed, the sample is introduced, and it is reopened after a controlled period of time of the order of 15 to 60 s.
- The solvent condenses at the entrance to the column forming a mixed phase of high thickness when the divider is closed.
- The carrier gas that carries the sample, once evaporated, is divided into two parts: one passes to the column and the other is sent abroad.
- The sample is introduced cold and a part is deposited on a filling and heated quickly to produce homogeneous evaporation of the solution. | The carrier gas that carries the sample, once evaporated, is divided into two parts: one passes to the column and the other is sent abroad. |
Cuaderno_2014_1_Q | 2014 | chemistry | 49 | A biosensor consists of: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "A receiver, a transducer, and an enzymatic brand."
},
{
"aid": 2,
"atext": "A receptor and an enzymatic brand."
},
{
"aid": 3,
"atext": "A transducer and an enzymatic brand."
},
{
"aid": 4,
"atext": "A receiver and a transducer."
},
{
"aid": 5,
"atext": "A receptor and an antibody."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A biosensor consists of:
What is the correct answer?
- A receiver, a transducer, and an enzymatic brand.
- A receptor and an enzymatic brand.
- A transducer and an enzymatic brand.
- A receiver and a transducer.
- A receptor and an antibody. | A receiver and a transducer. |
Cuaderno_2014_1_Q | 2014 | chemistry | 50 | The chloride present in a solution can be determined volumetrically, by the Mohr method, using Ag (I) as a reagent. What indicator is used in this assessment ?: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "K2Cr2O7."
},
{
"aid": 2,
"atext": "Fe2 (SO4) 3."
},
{
"aid": 3,
"atext": "K2CrO4."
},
{
"aid": 4,
"atext": "KSCN"
},
{
"aid": 5,
"atext": "FeSO4."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The chloride present in a solution can be determined volumetrically, by the Mohr method, using Ag (I) as a reagent. What indicator is used in this assessment ?:
What is the correct answer?
- K2Cr2O7.
- Fe2 (SO4) 3.
- K2CrO4.
- KSCN
- FeSO4. | K2CrO4. |
Cuaderno_2014_1_Q | 2014 | chemistry | 51 | In the kinetic methods of analysis: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Slow reactions can be used."
},
{
"aid": 2,
"atext": "It is necessary that the reaction be completed in order to obtain the data of the equilibrium concentrations."
},
{
"aid": 3,
"atext": "Low concentrations of a catalyst can be determined as long as the speed of the reaction does not depend on the concentration thereof."
},
{
"aid": 4,
"atext": "It is not necessary to rigorously control the experimental conditions."
},
{
"aid": 5,
"atext": "Mixtures of analytes can be determined as long as they all react with the same reagent at the same reaction rate."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the kinetic methods of analysis:
What is the correct answer?
- Slow reactions can be used.
- It is necessary that the reaction be completed in order to obtain the data of the equilibrium concentrations.
- Low concentrations of a catalyst can be determined as long as the speed of the reaction does not depend on the concentration thereof.
- It is not necessary to rigorously control the experimental conditions.
- Mixtures of analytes can be determined as long as they all react with the same reagent at the same reaction rate. | Slow reactions can be used. |
Cuaderno_2014_1_Q | 2014 | chemistry | 52 | In the evaluation of a base with hydrochloric acid, it is known that the equivalence point appears at pH 5.54. If the bromocresol purple is used as indicator, whose turning interval is 5.2-6.8, the end point is observed at pH: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "6.0, with a small error by default."
},
{
"aid": 2,
"atext": "6.8, with an error by excess."
},
{
"aid": 3,
"atext": "5.2, with a small error for excess."
},
{
"aid": 4,
"atext": "5.54. There is no error"
},
{
"aid": 5,
"atext": "6.0, with an error for excess."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the evaluation of a base with hydrochloric acid, it is known that the equivalence point appears at pH 5.54. If the bromocresol purple is used as indicator, whose turning interval is 5.2-6.8, the end point is observed at pH:
What is the correct answer?
- 6.0, with a small error by default.
- 6.8, with an error by excess.
- 5.2, with a small error for excess.
- 5.54. There is no error
- 6.0, with an error for excess. | 5.2, with a small error for excess. |
Cuaderno_2014_1_Q | 2014 | chemistry | 53 | Clark's electrode is based on: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Potentiometric."
},
{
"aid": 2,
"atext": "Potentiostatic"
},
{
"aid": 3,
"atext": "Optical."
},
{
"aid": 4,
"atext": "Amperometric."
},
{
"aid": 5,
"atext": "Conductimetric"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Clark's electrode is based on:
What is the correct answer?
- Potentiometric.
- Potentiostatic
- Optical.
- Amperometric.
- Conductimetric | Amperometric. |
Cuaderno_2014_1_Q | 2014 | chemistry | 54 | A coulometric evaluation: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "You do not need the current performance to be 100%."
},
{
"aid": 2,
"atext": "It does not need an indicator system of the end point."
},
{
"aid": 3,
"atext": "Always use a potentiostatic system."
},
{
"aid": 4,
"atext": "It uses a titrant that is generated electrolytically."
},
{
"aid": 5,
"atext": "You need a burette to add the titrant."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A coulometric evaluation:
What is the correct answer?
- You do not need the current performance to be 100%.
- It does not need an indicator system of the end point.
- Always use a potentiostatic system.
- It uses a titrant that is generated electrolytically.
- You need a burette to add the titrant. | It uses a titrant that is generated electrolytically. |
Cuaderno_2014_1_Q | 2014 | chemistry | 56 | A basic component of spectrophotometers is the monochromator. Its function is: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Connect the different wavelengths from the source to achieve greater light power."
},
{
"aid": 2,
"atext": "Transform the optical signal measured by the detector into an electrical signal."
},
{
"aid": 3,
"atext": "Disperse the light separating the wavelengths that compose it and select a narrow band."
},
{
"aid": 4,
"atext": "Amplify the analytical signal by improving the signal-to-noise ratio."
},
{
"aid": 5,
"atext": "Decrease the power of the light beam to eliminate the background noise of the spectrophotometer."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A basic component of spectrophotometers is the monochromator. Its function is:
What is the correct answer?
- Connect the different wavelengths from the source to achieve greater light power.
- Transform the optical signal measured by the detector into an electrical signal.
- Disperse the light separating the wavelengths that compose it and select a narrow band.
- Amplify the analytical signal by improving the signal-to-noise ratio.
- Decrease the power of the light beam to eliminate the background noise of the spectrophotometer. | Disperse the light separating the wavelengths that compose it and select a narrow band. |
Cuaderno_2014_1_Q | 2014 | chemistry | 57 | Turbidimetry and nephelometry are non-spectroscopic techniques based on the dispersion of light, with interesting applications in biochemical analysis. The criteria to be taken into account when choosing between nephelometry and turbidimetry in the analysis of a sample containing particles in suspension are: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The size of the suspended particles and the detector of the instrument."
},
{
"aid": 2,
"atext": "The size of the suspended particles and the wavelength of the radiation used."
},
{
"aid": 3,
"atext": "The wavelength of the radiation emitted and the shape of the suspended particles."
},
{
"aid": 4,
"atext": "The size of the suspended particles and the color of them."
},
{
"aid": 5,
"atext": "The color of the particles and their fluorescence."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Turbidimetry and nephelometry are non-spectroscopic techniques based on the dispersion of light, with interesting applications in biochemical analysis. The criteria to be taken into account when choosing between nephelometry and turbidimetry in the analysis of a sample containing particles in suspension are:
What is the correct answer?
- The size of the suspended particles and the detector of the instrument.
- The size of the suspended particles and the wavelength of the radiation used.
- The wavelength of the radiation emitted and the shape of the suspended particles.
- The size of the suspended particles and the color of them.
- The color of the particles and their fluorescence. | The size of the suspended particles and the wavelength of the radiation used. |
Cuaderno_2014_1_Q | 2014 | chemistry | 58 | In chemiluminescent measurements, the analyte to be determined must first pass to the excited state by: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Absorption of electromagnetic radiation."
},
{
"aid": 2,
"atext": "Emission of electromagnetic radiation."
},
{
"aid": 3,
"atext": "A chemical reaction"
},
{
"aid": 4,
"atext": "Radio waves."
},
{
"aid": 5,
"atext": "Sound waves."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In chemiluminescent measurements, the analyte to be determined must first pass to the excited state by:
What is the correct answer?
- Absorption of electromagnetic radiation.
- Emission of electromagnetic radiation.
- A chemical reaction
- Radio waves.
- Sound waves. | A chemical reaction |
Cuaderno_2014_1_Q | 2014 | chemistry | 59 | When carrying out the validation of an analytical method it is necessary to take into account the following basic aspects: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Validate the analytical process as a whole, the range of concentrations in which it is applied, as well as the method in a single matrix to ensure selectivity."
},
{
"aid": 2,
"atext": "Validate the previous stages of treatment of the sample, the range of concentrations in which it is applied and the method in a single matrix to ensure the selectivity."
},
{
"aid": 3,
"atext": "Validate the final measurement method, validate the range of low concentrations (traces) in which it is applied and the method in a single matrix to ensure sensitivity."
},
{
"aid": 4,
"atext": "All that is required is to validate the instrumentation by means of suitable calibrations."
},
{
"aid": 5,
"atext": "Validate the analytical process as a whole, the concentration interval in which it is applied and the method in each of the matrices to which it will be applied."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
When carrying out the validation of an analytical method it is necessary to take into account the following basic aspects:
What is the correct answer?
- Validate the analytical process as a whole, the range of concentrations in which it is applied, as well as the method in a single matrix to ensure selectivity.
- Validate the previous stages of treatment of the sample, the range of concentrations in which it is applied and the method in a single matrix to ensure the selectivity.
- Validate the final measurement method, validate the range of low concentrations (traces) in which it is applied and the method in a single matrix to ensure sensitivity.
- All that is required is to validate the instrumentation by means of suitable calibrations.
- Validate the analytical process as a whole, the concentration interval in which it is applied and the method in each of the matrices to which it will be applied. | Validate the analytical process as a whole, the concentration interval in which it is applied and the method in each of the matrices to which it will be applied. |
Cuaderno_2014_1_Q | 2014 | chemistry | 60 | If an analytical method allows to determine 1 ppm of Pb, we are referring to: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "1 mg / L."
},
{
"aid": 2,
"atext": "1 mg / mL."
},
{
"aid": 3,
"atext": "1 μg / L."
},
{
"aid": 4,
"atext": "1 ng / L."
},
{
"aid": 5,
"atext": "1 ng / mL."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
If an analytical method allows to determine 1 ppm of Pb, we are referring to:
What is the correct answer?
- 1 mg / L.
- 1 mg / mL.
- 1 μg / L.
- 1 ng / L.
- 1 ng / mL. | 1 mg / L. |
Cuaderno_2014_1_Q | 2014 | chemistry | 61 | The alkaline error that occurs in glass electrodes for the average pH: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is due to the presence of an excessive concentration of protons that is replaced by sodium ions in the glass membrane."
},
{
"aid": 2,
"atext": "Occurs at neutral pH due to the absence of protons."
},
{
"aid": 3,
"atext": "It takes place at very alkaline pH, in which the sodium ion behaves as if it were a proton."
},
{
"aid": 4,
"atext": "It appears as a consequence of the dehydration of the glass membrane."
},
{
"aid": 5,
"atext": "It occurs when the electrode is introduced into pure water due to the dissolution of the sodium ions in the membrane."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The alkaline error that occurs in glass electrodes for the average pH:
What is the correct answer?
- It is due to the presence of an excessive concentration of protons that is replaced by sodium ions in the glass membrane.
- Occurs at neutral pH due to the absence of protons.
- It takes place at very alkaline pH, in which the sodium ion behaves as if it were a proton.
- It appears as a consequence of the dehydration of the glass membrane.
- It occurs when the electrode is introduced into pure water due to the dissolution of the sodium ions in the membrane. | It takes place at very alkaline pH, in which the sodium ion behaves as if it were a proton. |
Cuaderno_2014_1_Q | 2014 | chemistry | 62 | Temperature is one of the important variables in the emission techniques, because: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The energy emitted by the atoms varies exponentially with it."
},
{
"aid": 2,
"atext": "The population of atoms in the excited state decreases when it increases."
},
{
"aid": 3,
"atext": "The population of atoms in the excited state increases when it decreases."
},
{
"aid": 4,
"atext": "By increasing the atoms evaporate and the analytical signal decreases."
},
{
"aid": 5,
"atext": "When increasing it increases the power of the electromagnetic radiation coming from the hollow cathode lamp."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Temperature is one of the important variables in the emission techniques, because:
What is the correct answer?
- The energy emitted by the atoms varies exponentially with it.
- The population of atoms in the excited state decreases when it increases.
- The population of atoms in the excited state increases when it decreases.
- By increasing the atoms evaporate and the analytical signal decreases.
- When increasing it increases the power of the electromagnetic radiation coming from the hollow cathode lamp. | The energy emitted by the atoms varies exponentially with it. |
Cuaderno_2014_1_Q | 2014 | chemistry | 63 | A primary standard solution in a titration should not: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Be prepared from a high purity reagent."
},
{
"aid": 2,
"atext": "Have an exactly known concentration."
},
{
"aid": 3,
"atext": "Keep your composition over time."
},
{
"aid": 4,
"atext": "React instantly."
},
{
"aid": 5,
"atext": "Give rise to secondary reactions."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A primary standard solution in a titration should not:
What is the correct answer?
- Be prepared from a high purity reagent.
- Have an exactly known concentration.
- Keep your composition over time.
- React instantly.
- Give rise to secondary reactions. | Give rise to secondary reactions. |
Cuaderno_2014_1_Q | 2014 | chemistry | 64 | A classification of gas chromatography detectors commonly found in the literature divides them into concentration and mass detectors, destructive and non-destructive, integral or differential and universal or selective. According to this classification: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The thermal conductivity detector is a selective detector."
},
{
"aid": 2,
"atext": "The flame ionization detector responds to the concentration of the analyte."
},
{
"aid": 3,
"atext": "The thermal conductivity detector responds to the concentration of the analyte."
},
{
"aid": 4,
"atext": "The phosphorus and nitrogen detector (NPD) is a universal detector."
},
{
"aid": 5,
"atext": "The thermocalorimeter detector is of the differential type."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A classification of gas chromatography detectors commonly found in the literature divides them into concentration and mass detectors, destructive and non-destructive, integral or differential and universal or selective. According to this classification:
What is the correct answer?
- The thermal conductivity detector is a selective detector.
- The flame ionization detector responds to the concentration of the analyte.
- The thermal conductivity detector responds to the concentration of the analyte.
- The phosphorus and nitrogen detector (NPD) is a universal detector.
- The thermocalorimeter detector is of the differential type. | The thermal conductivity detector responds to the concentration of the analyte. |
Cuaderno_2014_1_Q | 2014 | chemistry | 65 | The method of continuous variations is used in molecular absorption spectrophotometry to: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Determine the position of the isobestic point in a mixture of absorbent species."
},
{
"aid": 2,
"atext": "Calculate the exact position of the absorption maximum of an absorbent complex."
},
{
"aid": 3,
"atext": "Obtain the pH corresponding to the end point of the titration of an absorbing acid or base."
},
{
"aid": 4,
"atext": "Calculate the stoichiometry of an absorbent complex."
},
{
"aid": 5,
"atext": "Calculate the exact value of the dissociation constant of an absorbent acid."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The method of continuous variations is used in molecular absorption spectrophotometry to:
What is the correct answer?
- Determine the position of the isobestic point in a mixture of absorbent species.
- Calculate the exact position of the absorption maximum of an absorbent complex.
- Obtain the pH corresponding to the end point of the titration of an absorbing acid or base.
- Calculate the stoichiometry of an absorbent complex.
- Calculate the exact value of the dissociation constant of an absorbent acid. | Calculate the stoichiometry of an absorbent complex. |
Cuaderno_2014_1_Q | 2014 | chemistry | 66 | A potentiometric titration is always done at i = 0: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Yes, because that is where the Nernst equation is fulfilled."
},
{
"aid": 2,
"atext": "Yes, because it is an instrumental requirement."
},
{
"aid": 3,
"atext": "No, because there are potentiometric titrations at constant i."
},
{
"aid": 4,
"atext": "No, because potentiometric titrations are never made at i = 0."
},
{
"aid": 5,
"atext": "Yes, as long as an indicator electrode and a reference electrode are used."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A potentiometric titration is always done at i = 0:
What is the correct answer?
- Yes, because that is where the Nernst equation is fulfilled.
- Yes, because it is an instrumental requirement.
- No, because there are potentiometric titrations at constant i.
- No, because potentiometric titrations are never made at i = 0.
- Yes, as long as an indicator electrode and a reference electrode are used. | No, because there are potentiometric titrations at constant i. |
Cuaderno_2014_1_Q | 2014 | chemistry | 67 | In the technique of analysis by injection in flow: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "A relatively large volume of sample is injected into the system, obtaining signals at steady state."
},
{
"aid": 2,
"atext": "A small volume of sample whose integrity is maintained by segmentation with air bubbles is introduced."
},
{
"aid": 3,
"atext": "The sample maintains its integrity throughout the process as it is available in separate containers."
},
{
"aid": 4,
"atext": "The responses obtained have a peak shape whose height depends on the concentration of the sample."
},
{
"aid": 5,
"atext": "The main difficulty lies in the slowness of the measures."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the technique of analysis by injection in flow:
What is the correct answer?
- A relatively large volume of sample is injected into the system, obtaining signals at steady state.
- A small volume of sample whose integrity is maintained by segmentation with air bubbles is introduced.
- The sample maintains its integrity throughout the process as it is available in separate containers.
- The responses obtained have a peak shape whose height depends on the concentration of the sample.
- The main difficulty lies in the slowness of the measures. | The responses obtained have a peak shape whose height depends on the concentration of the sample. |
Cuaderno_2014_1_Q | 2014 | chemistry | 68 | The determination of dissolved oxygen in natural water samples, using the Winkler method, is based on the previous oxidation of Mn (II) in an alkaline medium to: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Mn (IV)."
},
{
"aid": 2,
"atext": "Mn (VI)"
},
{
"aid": 3,
"atext": "Mn (VII)."
},
{
"aid": 4,
"atext": "Mn (V)."
},
{
"aid": 5,
"atext": "Mn (I)."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The determination of dissolved oxygen in natural water samples, using the Winkler method, is based on the previous oxidation of Mn (II) in an alkaline medium to:
What is the correct answer?
- Mn (IV).
- Mn (VI)
- Mn (VII).
- Mn (V).
- Mn (I). | Mn (IV). |
Cuaderno_2014_1_Q | 2014 | chemistry | 69 | The spectrum of Circular Discipism of a molecule gives information about: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The isosbestic point."
},
{
"aid": 2,
"atext": "The isoelectric point."
},
{
"aid": 3,
"atext": "Optically active chromophores."
},
{
"aid": 4,
"atext": "Functional groups."
},
{
"aid": 5,
"atext": "Molecular weight."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The spectrum of Circular Discipism of a molecule gives information about:
What is the correct answer?
- The isosbestic point.
- The isoelectric point.
- Optically active chromophores.
- Functional groups.
- Molecular weight. | Optically active chromophores. |
Cuaderno_2014_1_Q | 2014 | chemistry | 70 | In an electrogravimetric analysis: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The increase in mass of the electrode indicates the amount of analyte."
},
{
"aid": 2,
"atext": "Current performance must be 100%."
},
{
"aid": 3,
"atext": "A platinum mesh is always used as a working electrode."
},
{
"aid": 4,
"atext": "A reference electrode is always needed."
},
{
"aid": 5,
"atext": "The solution does not need to be conductive."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In an electrogravimetric analysis:
What is the correct answer?
- The increase in mass of the electrode indicates the amount of analyte.
- Current performance must be 100%.
- A platinum mesh is always used as a working electrode.
- A reference electrode is always needed.
- The solution does not need to be conductive. | The increase in mass of the electrode indicates the amount of analyte. |
Cuaderno_2014_1_Q | 2014 | chemistry | 71 | In the determination of water hardness due to the presence of Ca2 + and Mg2 + ions, the titrant reagent is used: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Methyl orange."
},
{
"aid": 2,
"atext": "A standard solution of potassium chloride."
},
{
"aid": 3,
"atext": "Black Eriochrome T."
},
{
"aid": 4,
"atext": "A standard solution of ethylenediaminetetraacetic acid (EDTA)."
},
{
"aid": 5,
"atext": "A solution of AEDT previously standardized against a solution of potassium phthalate."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the determination of water hardness due to the presence of Ca2 + and Mg2 + ions, the titrant reagent is used:
What is the correct answer?
- Methyl orange.
- A standard solution of potassium chloride.
- Black Eriochrome T.
- A standard solution of ethylenediaminetetraacetic acid (EDTA).
- A solution of AEDT previously standardized against a solution of potassium phthalate. | A standard solution of ethylenediaminetetraacetic acid (EDTA). |
Cuaderno_2014_1_Q | 2014 | chemistry | 72 | The solubility of calcium fluoride in a solution of pH <3 is higher than in pure water due to: | 5 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "The absence of reactions of formation of hydroxylated calcium complexes at these pH values."
},
{
"aid": 2,
"atext": "The lower hydration capacity of the precipitate particles at these pH values."
},
{
"aid": 3,
"atext": "The absence of reactions of formation of soluble complexes of calcium and fluoride at these pH values."
},
{
"aid": 4,
"atext": "The complex formation reactions of the Ca2 + ion with the hydronium."
},
{
"aid": 5,
"atext": "The protonation reaction of the fluoride anion."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The solubility of calcium fluoride in a solution of pH <3 is higher than in pure water due to:
What is the correct answer?
- The absence of reactions of formation of hydroxylated calcium complexes at these pH values.
- The lower hydration capacity of the precipitate particles at these pH values.
- The absence of reactions of formation of soluble complexes of calcium and fluoride at these pH values.
- The complex formation reactions of the Ca2 + ion with the hydronium.
- The protonation reaction of the fluoride anion. | The protonation reaction of the fluoride anion. |
Cuaderno_2014_1_Q | 2014 | chemistry | 73 | A cyclic voltammetry: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is based on a stationary broadcasting regime."
},
{
"aid": 2,
"atext": "It uses macroelectrodes as working electrodes."
},
{
"aid": 3,
"atext": "He never needs a potentiostatic system."
},
{
"aid": 4,
"atext": "It is always done in a non-agitated solution."
},
{
"aid": 5,
"atext": "It uses a square wave potential format as an excitation system."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
A cyclic voltammetry:
What is the correct answer?
- It is based on a stationary broadcasting regime.
- It uses macroelectrodes as working electrodes.
- He never needs a potentiostatic system.
- It is always done in a non-agitated solution.
- It uses a square wave potential format as an excitation system. | It is always done in a non-agitated solution. |
Cuaderno_2014_1_Q | 2014 | chemistry | 74 | When you want to analyze the volatile components of a liquid or solid sample by gas chromatography, a headspace methodology (HS-GC) is usually used. In its static form: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "An aerosol is generated on the solid samples by passing a gas flow over it, which causes the transfer of volatile compounds to it. After a while, a volume of this gas is introduced into the column."
},
{
"aid": 2,
"atext": "It is used to analyze a liquid in contact with a gas, by injecting a small volume of liquid into the head of the column."
},
{
"aid": 3,
"atext": "The sample is placed in a vial with a volume of gas above, closed and thermostatted. Once the equilibrium between the two phases is reached, an aliquot of gas is introduced into the stream of the carrier gas that goes to the column."
},
{
"aid": 4,
"atext": "The sample in liquid form is placed in a vial and closed. After a while, the same is opened so that the volatile components are balanced with those of the environment and subsequently, a volume of the gas surrounding the chromatograph is introduced."
},
{
"aid": 5,
"atext": "An extraction of the liquid or solid sample is carried out to a gas that flows on it continuously."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
When you want to analyze the volatile components of a liquid or solid sample by gas chromatography, a headspace methodology (HS-GC) is usually used. In its static form:
What is the correct answer?
- An aerosol is generated on the solid samples by passing a gas flow over it, which causes the transfer of volatile compounds to it. After a while, a volume of this gas is introduced into the column.
- It is used to analyze a liquid in contact with a gas, by injecting a small volume of liquid into the head of the column.
- The sample is placed in a vial with a volume of gas above, closed and thermostatted. Once the equilibrium between the two phases is reached, an aliquot of gas is introduced into the stream of the carrier gas that goes to the column.
- The sample in liquid form is placed in a vial and closed. After a while, the same is opened so that the volatile components are balanced with those of the environment and subsequently, a volume of the gas surrounding the chromatograph is introduced.
- An extraction of the liquid or solid sample is carried out to a gas that flows on it continuously. | The sample is placed in a vial with a volume of gas above, closed and thermostatted. Once the equilibrium between the two phases is reached, an aliquot of gas is introduced into the stream of the carrier gas that goes to the column. |
Cuaderno_2014_1_Q | 2014 | chemistry | 75 | In the valuation of a strong base with a strong acid the pH of the equivalence point: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It depends on the strong base that is valued."
},
{
"aid": 2,
"atext": "It is determined by the excess OH ̄ of the solution."
},
{
"aid": 3,
"atext": "It depends on the strong acid used as a titrant."
},
{
"aid": 4,
"atext": "It is determined by the dissociation of water."
},
{
"aid": 5,
"atext": "It is determined by the excess H + of the solution."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
In the valuation of a strong base with a strong acid the pH of the equivalence point:
What is the correct answer?
- It depends on the strong base that is valued.
- It is determined by the excess OH ̄ of the solution.
- It depends on the strong acid used as a titrant.
- It is determined by the dissociation of water.
- It is determined by the excess H + of the solution. | It is determined by the dissociation of water. |
Cuaderno_2014_1_Q | 2014 | chemistry | 76 | Reactions in which there are no intermediates are described as: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Concerted."
},
{
"aid": 2,
"atext": "Polar"
},
{
"aid": 3,
"atext": "Radicals"
},
{
"aid": 4,
"atext": "Homolitic"
},
{
"aid": 5,
"atext": "Heterolithic"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Reactions in which there are no intermediates are described as:
What is the correct answer?
- Concerted.
- Polar
- Radicals
- Homolitic
- Heterolithic | Concerted. |
Cuaderno_2014_1_Q | 2014 | chemistry | 77 | The number of signals in the 13 C NMR spectrum of cis-1,2 dimethylcyclopentane with proton decoupling is: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Three."
},
{
"aid": 2,
"atext": "Four."
},
{
"aid": 3,
"atext": "Five."
},
{
"aid": 4,
"atext": "Six."
},
{
"aid": 5,
"atext": "Seven."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The number of signals in the 13 C NMR spectrum of cis-1,2 dimethylcyclopentane with proton decoupling is:
What is the correct answer?
- Three.
- Four.
- Five.
- Six.
- Seven. | Four. |
Cuaderno_2014_1_Q | 2014 | chemistry | 78 | Which of the following alcohols has the lowest pKa value ?: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Ethanol."
},
{
"aid": 2,
"atext": "2-Chloroethanol."
},
{
"aid": 3,
"atext": "2-Propanol."
},
{
"aid": 4,
"atext": "2,2,2-Trifluoroethanol."
},
{
"aid": 5,
"atext": "1,1-Dimethylethanol."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Which of the following alcohols has the lowest pKa value ?:
What is the correct answer?
- Ethanol.
- 2-Chloroethanol.
- 2-Propanol.
- 2,2,2-Trifluoroethanol.
- 1,1-Dimethylethanol. | 2,2,2-Trifluoroethanol. |
Cuaderno_2014_1_Q | 2014 | chemistry | 80 | Neighboring halohydrins, when treated with a base, are easily transformed into: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Dioles"
},
{
"aid": 2,
"atext": "Alquenos"
},
{
"aid": 3,
"atext": "Alcohols"
},
{
"aid": 4,
"atext": "Epoxides"
},
{
"aid": 5,
"atext": "Ketones"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Neighboring halohydrins, when treated with a base, are easily transformed into:
What is the correct answer?
- Dioles
- Alquenos
- Alcohols
- Epoxides
- Ketones | Epoxides |
Cuaderno_2014_1_Q | 2014 | chemistry | 81 | The Wittig reaction is one of the most important processes to obtain: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Alquenos"
},
{
"aid": 2,
"atext": "Alcanes."
},
{
"aid": 3,
"atext": "Ketones"
},
{
"aid": 4,
"atext": "Ethers"
},
{
"aid": 5,
"atext": "Nitriles"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The Wittig reaction is one of the most important processes to obtain:
What is the correct answer?
- Alquenos
- Alcanes.
- Ketones
- Ethers
- Nitriles | Alquenos |
Cuaderno_2014_1_Q | 2014 | chemistry | 82 | The arenio ion is a reaction intermediate that is formed in the reactions of: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Electrophilic addition."
},
{
"aid": 2,
"atext": "Electrophilic aromatic substitution."
},
{
"aid": 3,
"atext": "Nucleophilic substitution."
},
{
"aid": 4,
"atext": "Nucleophilic addition."
},
{
"aid": 5,
"atext": "Aromatic nucleophilic substitution."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The arenio ion is a reaction intermediate that is formed in the reactions of:
What is the correct answer?
- Electrophilic addition.
- Electrophilic aromatic substitution.
- Nucleophilic substitution.
- Nucleophilic addition.
- Aromatic nucleophilic substitution. | Electrophilic aromatic substitution. |
Cuaderno_2014_1_Q | 2014 | chemistry | 83 | Organomagnesium compounds are commonly referred to as: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Lipshutz"
},
{
"aid": 2,
"atext": "Birch."
},
{
"aid": 3,
"atext": "Grignard."
},
{
"aid": 4,
"atext": "Noyori"
},
{
"aid": 5,
"atext": "Blanc."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Organomagnesium compounds are commonly referred to as:
What is the correct answer?
- Lipshutz
- Birch.
- Grignard.
- Noyori
- Blanc. | Grignard. |
Cuaderno_2014_1_Q | 2014 | chemistry | 84 | Dimethyl sulfoxide (DMSO): | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "It is a protic polar solvent."
},
{
"aid": 2,
"atext": "It is a polar aprotic solvent."
},
{
"aid": 3,
"atext": "It is not a solvent."
},
{
"aid": 4,
"atext": "It is a colorless solid."
},
{
"aid": 5,
"atext": "None of the above."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
Dimethyl sulfoxide (DMSO):
What is the correct answer?
- It is a protic polar solvent.
- It is a polar aprotic solvent.
- It is not a solvent.
- It is a colorless solid.
- None of the above. | It is a polar aprotic solvent. |
Cuaderno_2014_1_Q | 2014 | chemistry | 85 | The reaction of 5-Decino with sodium in ammonia and tert-butanol produces: | 4 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Dean."
},
{
"aid": 2,
"atext": "cis-5-Decene."
},
{
"aid": 3,
"atext": "5-Decanamin."
},
{
"aid": 4,
"atext": "trans-5-Decene."
},
{
"aid": 5,
"atext": "5,6-Decanodiamine."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The reaction of 5-Decino with sodium in ammonia and tert-butanol produces:
What is the correct answer?
- Dean.
- cis-5-Decene.
- 5-Decanamin.
- trans-5-Decene.
- 5,6-Decanodiamine. | trans-5-Decene. |
Cuaderno_2014_1_Q | 2014 | chemistry | 86 | The coupling of a terminal alkyne with vinyl halide by palladium catalysis is known as the reaction of: | 3 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "Heck"
},
{
"aid": 2,
"atext": "Suzuki"
},
{
"aid": 3,
"atext": "Sonogashira."
},
{
"aid": 4,
"atext": "Stille"
},
{
"aid": 5,
"atext": "Nicolaou"
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The coupling of a terminal alkyne with vinyl halide by palladium catalysis is known as the reaction of:
What is the correct answer?
- Heck
- Suzuki
- Sonogashira.
- Stille
- Nicolaou | Sonogashira. |
Cuaderno_2014_1_Q | 2014 | chemistry | 87 | The NR3 group of a quaternary ammonium salt, R ̶ NR3, is a good leaving group in reactions: | 2 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "E1."
},
{
"aid": 2,
"atext": "E2."
},
{
"aid": 3,
"atext": "SN1."
},
{
"aid": 4,
"atext": "SN2."
},
{
"aid": 5,
"atext": "In none of the above."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The NR3 group of a quaternary ammonium salt, R ̶ NR3, is a good leaving group in reactions:
What is the correct answer?
- E1.
- E2.
- SN1.
- SN2.
- In none of the above. | E2. |
Cuaderno_2014_1_Q | 2014 | chemistry | 88 | The reaction of ethyl acetate and acetone in the presence of sodium hydride in diethyl ether generates, after hydrolysis: | 1 | Not supported with pagination yet | [
{
"aid": 1,
"atext": "2,4-Pentanedione."
},
{
"aid": 2,
"atext": "4-Methyl-3-penten-2-one."
},
{
"aid": 3,
"atext": "3-Oxobutanoate of ethyl."
},
{
"aid": 4,
"atext": "2,3-Pentanedione."
},
{
"aid": 5,
"atext": "4-Hydroxy-4-methyl-2-pentanone."
}
] | multiple_choice_q_and_a_with_context_en | Answer/complete the following paragraph about {{category}}:
{{qtext}}
What is the correct answer?
- {{ answers | map(attribute="atext")| join("\n- ") }}
|||
{% for answer in answers if answer["aid"]==ra -%}
{{answer["atext"]}}
{%- endfor %} | Answer/complete the following paragraph about chemistry:
The reaction of ethyl acetate and acetone in the presence of sodium hydride in diethyl ether generates, after hydrolysis:
What is the correct answer?
- 2,4-Pentanedione.
- 4-Methyl-3-penten-2-one.
- 3-Oxobutanoate of ethyl.
- 2,3-Pentanedione.
- 4-Hydroxy-4-methyl-2-pentanone. | 2,4-Pentanedione. |