Acids and Bases: Grade 7 QuizOnline version
by Abegail Atienza
1
What is a defining feature of an acid in the pH scale?
2
Which instrument is used to test whether a solution is acidic or basic?
3
What is a base commonly found in households?
4
What happens to red litmus paper in a basic solution?
5
Which of the following is an example of an acid?
6
Which of the following is an example of a base?
7
What is neutralization?
8
Which statement correctly describes pH 7?
9
If a solution turns blue litmus paper red, what can you conclude?
10
What safety practice should you follow when handling acids and bases?
Feedback
acids have pH < 7 and turn red litmus red.
Litmus paper changes color in acidic or basic solutions.
Soap acts as a basic substance; vinegar and lemon juice are acids.
Bases turn red litmus blue; blue litmus remains blue or turns blue.
Citrus fruits contain citric acid, a common acid.
Ammonia is a common base; vinegar/lemon juice are acids.
Neutralization combines acid and base producing salt and water.
pH 7 is neither acidic nor basic.
Acids turn blue litmus red; red litmus stays red.
Always use proper PPE and handle with care.