Acids and Base Quiz – Test Your knowledge

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ACIDS & BASE QUIZ Test your ability and knowledge

1. Which of the following is a property of acids?
A. Bitter taste
B. Slippery feel
C. Sour taste
D. No reaction with metals

2. Bases are substances that
A. Donate protons
B. Accept protons
C. Donate electrons only
D. Are always neutral

3. Which of the following is a strong acid?
A. HCl
B. CH₃COOH
C. H₂CO₃
D. H₂O

4. A common strong base is
A. NaOH
B. NH₄OH
C. H₂O
D. CH₃COONa

Acids and Base Quiz

5. Litmus paper turns red in
A. Acidic solution
B. Basic solution
C. Neutral solution
D. Both acid and base

6. Litmus paper turns blue in
A. Acidic solution
B. Basic solution
C. Neutral solution
D. Both acid and base

7. The pH of a neutral solution is
A. 0
B. 7
C. 14
D. 1

8. pH less than 7 indicates a
A. Base
B. Acid
C. Neutral solution
D. Salt solution

9. pH greater than 7 indicates a
A. Base
B. Acid
C. Neutral solution
D. Salt solution

10. The reaction of an acid with a base is called
A. Combustion
B. Neutralization
C. Oxidation
D. Reduction

Acids and Base Quiz

11. Which of the following is an example of a weak acid?
A. HCl
B. HNO₃
C. CH₃COOH
D. H₂SO₄

12. Which of the following is an example of a weak base?
A. NaOH
B. KOH
C. NH₄OH
D. Ca(OH)₂

13. Acids react with metals to produce
A. Oxygen gas
B. Hydrogen gas
C. Carbon dioxide
D. Water

14. Bases react with fats to produce
A. Soap
B. Salt
C. Hydrogen
D. Carbon dioxide

15. Universal indicator turns green in
A. Acidic solution
B. Neutral solution
C. Basic solution
D. Strong acid

Acids and Base Quiz

16. A solution with pH 2 is
A. Strongly acidic
B. Weakly acidic
C. Neutral
D. Strongly basic

17. A solution with pH 12 is
A. Strongly acidic
B. Weakly acidic
C. Neutral
D. Strongly basic

18. The formula H⁺ represents
A. Base ion
B. Hydroxide ion
C. Proton or hydrogen ion
D. Salt

19. The formula OH⁻ represents
A. Proton
B. Hydroxide ion
C. Neutral atom
D. Hydrogen gas

20. Salt is formed from the reaction of
A. Acid and water
B. Base and water
C. Acid and base
D. Acid and metal

ANSWERS AND EXPLANATIONS on Acids and Base Quiz

1. C – Acids have a sour taste, like lemon juice, and are reactive with metals and indicators.

2. B – Bases accept protons (H⁺ ions) and often feel slippery or soapy to touch.

3. A – HCl is a strong acid that dissociates completely in water, producing many H⁺ ions.

4. A – NaOH is a strong base that fully dissociates, releasing OH⁻ ions in solution.

5. A – Acidic solutions turn blue litmus red, indicating high concentration of H⁺ ions.

6. B – Bases turn red litmus blue due to the presence of OH⁻ ions in the solution.

7. B – Neutral solutions like pure water have a pH of 7, balanced between H⁺ and OH⁻ ions.

8. B – Solutions with pH <7 are acidic, indicating a higher concentration of H⁺ ions.

9. A – Solutions with pH >7 are basic, showing more OH⁻ ions than H⁺ ions.

10. B – Neutralization is when an acid reacts with a base to form salt and water.

11. C – CH₃COOH (acetic acid) partially dissociates, making it a weak acid.

12. C – NH₄OH partially dissociates in water, so it is classified as a weak base.

13. B – Acids react with metals to produce hydrogen gas and a salt in a single displacement reaction.

14. A – Bases react with fats/oils through saponification to produce soap and glycerol.

15. B – Universal indicator turns green in neutral solutions like pure water.

16. A – pH 2 indicates strong acidity with high concentration of H⁺ ions.

17. D – pH 12 indicates a strongly basic solution rich in OH⁻ ions.

18. C – H⁺ represents a proton or hydrogen ion, responsible for acidity.

19. B – OH⁻ is the hydroxide ion, responsible for basicity in solutions.

20. C – Salt forms when an acid reacts with a base, producing water and an ionic compound.

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