Questions on Acids
20 multiple choice questions about acids, suitable for chemistry students at the middle or high school level. The answers are provided at the end.
Multiple Choice Questions: Acids
1. Which of the following is a property of acids?
A) Taste bitter
B) Turn red litmus paper blue
C) Taste sour
D) Feel slippery
2. Which ion is released by acids in aqueous solution?
A) OH⁻
B) H⁺
C) Na⁺
D) Cl⁻
3. What color does blue litmus paper turn in an acidic solution?
A) Blue
B) Green
C) Red
D) Yellow
4. Which of the following is a strong acid?
A) Acetic acid
B) Citric acid
C) Hydrochloric acid
D) Carbonic acid
5. Which pH value indicates a strong acid?
A) 7
B) 9
C) 6
D) 1
6. Which of the following is NOT an acid?
A) Sulfuric acid
B) Nitric acid
C) Sodium hydroxide
D) Hydrochloric acid
7. What is the chemical formula for hydrochloric acid?
A) HCl
B) H₂SO₄
C) HNO₃
D) CH₃COOH
8. What is the common use of acetic acid?
A) Car battery acid
B) Vinegar
C) Fertilizer
D) Cleaning agent
9. Which acid is found in the stomach?
A) Sulfuric acid
B) Nitric acid
C) Hydrochloric acid
D) Acetic acid
10. Which acid is commonly used in car batteries?
A) Hydrochloric acid
B) Nitric acid
C) Sulfuric acid
D) Phosphoric acid
11. Which acid is found in citrus fruits?
A) Acetic acid
B) Citric acid
C) Formic acid
D) Lactic acid
12. Which of the following is an organic acid?
A) Sulfuric acid
B) Nitric acid
C) Acetic acid
D) Hydrochloric acid
13. What is the pH range of acids?
A) 7–14
B) 0–7
C) 7
D) 8–14
14. What happens when an acid reacts with a base?
A) A salt and water are formed
B) A gas is released
C) The solution becomes more acidic
D) Only heat is produced
15. Which acid is commonly used in the manufacture of fertilizers?
A) Nitric acid
B) Acetic acid
C) Carbonic acid
D) Formic acid
16. Which of these substances is a weak acid?
A) Hydrochloric acid
B) Sulfuric acid
C) Acetic acid
D) Nitric acid
17. Acids react with metals to produce:
A) Salt and water
B) Salt and hydrogen gas
C) Salt and oxygen
D) Salt and carbon dioxide
18. Which acid is used to remove rust (as a cleaning agent)?
A) Citric acid
B) Acetic acid
C) Hydrochloric acid
D) Sulfuric acid
19. What type of acid is CH₃COOH?
A) Mineral acid
B) Strong acid
C) Organic acid
D) Basic acid
20. Which acid is used in soft drinks?
A) Citric acid
B) Sulfuric acid
C) Acetic acid
D) Hydrochloric acid
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Answer Key
1. C) Taste sour
2. B) H⁺
3. C) Red
4. C) Hydrochloric acid
5. D) 1
6. C) Sodium hydroxide
7. A) HCl
8. B) Vinegar
9. C) Hydrochloric acid
10. C) Sulfuric acid
11. B) Citric acid
12. C) Acetic acid
13. B) 0–7
14. A) A salt and water are formed
15. A) Nitric acid
16. C) Acetic acid
17. B) Salt and hydrogen gas
18. C) Hydrochloric acid
19. C) Organic acid
20. A) Citric acid
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