question: What hue does acid change litmus paper to?
choices.text: Ionization red to white red to pink blue to red purple to blue VOCs and NOx recyclable detrimental
choices.label: A B C D E F G H
formatted_question: What hue does acid change litmus paper to? (A) Ionization (B) red to white (C) red to pink (D) blue to red (E) purple to blue (F) VOCs and NOx (G) recyclable (H) detrimental