General science · Difficulty 1
Try this ASVAB-style question.
Choose your answer before opening the explanation. This original practice item is for preparation and does not reproduce an official test question.
Lemon juice turns blue litmus paper red. Which concept is being demonstrated?
- mitosis
- ecosystem
- acid
- inertia
Reveal answer and explanation
acid
acid is a substance that donates hydrogen ions in water and has a ph below 7. Lemon juice turns blue litmus paper red.