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.
Which statement best describes acid?
- a community of organisms interacting with their physical environment
- a substance that donates hydrogen ions in water and has a pH below 7
- the tendency of an object to resist a change in motion
- cell division that produces two genetically similar daughter cells
Reveal answer and explanation
a substance that donates hydrogen ions in water and has a pH below 7
acid is a substance that donates hydrogen ions in water and has a ph below 7. Lemon juice turns blue litmus paper red.