Acids and Bases Quiz Online Practice Test

1. Which of the following is the most convenient and has the nearest approach to a universal pH measurement?

pH string

pH indicator

The emf method

The calorimeter

2. What is the typical pH of milk?

6.0

7.0

6.5

7.5

3. What is the pH of pure water at 25°C?

Highly acidic

Slightly acidic

Neutral

Slightly basic

4. Identify the reaction that deviates from the Arrhenius concept of acids and bases:

HCl(g) + NH3(g) → NH4Cl(s)

HCl(aq) + NaOH(aq) → NaCl(aq) + H2O(l)

HClO4(aq) + H2O(l) → H3O+(aq) + ClO4-(aq)

H3O+(aq) + OH-(aq) → 2H2O(l)

5. What is the pH of the solution obtained by mixing 100 mL of a pH 1 strong acid with 100 mL of a pH 2 strong acid?

3.5

2.26

2.0

1.26

6. In which of the following reactions H2PO4– act as an acid?

H3PO4 + H2O → H3O+ + H2PO4–

H2PO4– + H2O → HPO4^2– + H3O+

H2PO4– + OH–→ H3PO4 + O2-

H3O+ + OH–→ 2H2O

7. Which of the following is commonly used as an olfactory indicator?

China rose

Methyl orange

Lemon

Onion

8. Among the following species, which one can function as both a Bronsted acid and a Bronsted base?

H2SO4

OH-

HSO-4

NH3

9. The pH of a solution resulting from the combination of 100 mL of 0.20 M weak acid HA (Ka = 10^-5) and 100 mL of 0.20 M NaOH at room temperature is:

10. What is the pH of a solution formed by dissolving 0.005 moles of Ca(OH)2 in 50 mL of water?

10.5 approx.

13 approx.

8.2 approx.

15 approx.

11. Which of the following is not a common use of Bleaching powder?

Used in soda-acid fire extinguishers

Bleaching agent

Oxidizing agent

Disinfectant

12. When sodium hydrocarbonate solution is heated, what is the resulting product?

Ammonium chloride (NH4Cl)

Sodium nitrate (NaNO3)

Sodium carbonate (Na2CO3)

Sodium carbonate decahydrate (Na2CO3•10H2O)

13. What is the ratio of water molecules in plaster of Paris to gypsum?

1:4

3:1

1:3

4:3

14. What is the composition of baking powder?

Sodium carbonate + sodium tartaric

Sodium carbonate + tartaric acid

Sodium bicarbonate + sodium tartaric

Sodium carbonate + sodium benzoate

15. Which acid is employed in the production of fertilizers and explosives?

Sulfuric acid

Phosphoric acid

Nitric acid

Hydrochloric acid

16. What is a species that can act as both a Bronsted acid and a Bronsted base called?

Amphoteric

Neutral

Inert

Catalyst

17. In the equation: HF + H2O ⇌ H3O+ + F-
Which statement correctly describes the roles of the species involved?

H2O is a base and HF is its conjugate acid

H2O is an acid and HF is the conjugate base

HF is a base and H3O+ is its conjugate acid

HF is an acid and F- is its conjugate base

18. For the reaction of nitric acid with aluminum hydroxide, which of the following represents the correct net ionic equation?

H+ + OH- → H2O

HNO3 + Al(OH)3 → Al(NO3)3 + 3H2O

3H+ + Al(OH)3 → Al3+ + 3H2O

HNO3 + OH- → NO3- + H2O

19. Which of the following metal hydroxides exhibits amphoteric behavior?

NaOH

Ba(OH)2

Pb(OH)2

LiOH

20. What is the pH of a 0.001 M solution of hydrochloric acid (HCl)?

Test Name:	Acids and Bases Quiz
Subject Category:	Chemistry
Test Type:	Multiple Choice Questions
Total Score / Questions:	20 / 20
Time Allowed:	10 Min
Who Should Practice this Test:	Students, job seekers, or professionals preparing for competitive exams and interviews.

Acids and Bases Quiz Online Practice Test

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