Acids, Bases, and pH Scale MCQs

1. What is the pH of a neutral solution?
(A) 0
(B) 7
(C) 14
(D) 10

2. Which of the following substances is a base?
(A) HCl
(B) NaOH
(C) CH₃COOH
(D) H₂SO₄

3. Acids are substances that release which ion in aqueous solution?
(A) OH⁻
(B) H⁺
(C) Na⁺
(D) Cl⁻

4. What does a pH value below 7 indicate?
(A) A neutral solution
(B) A basic solution
(C) An acidic solution
(D) A saturated solution

5. Which of the following is a property of bases?
(A) Sour taste
(B) Turns blue litmus red
(C) Slippery to touch
(D) Releases H⁺ ions

6. Which of the following is a strong acid?
(A) NaOH
(B) HCl
(C) NH₃
(D) CH₃COOH

7. What color does red litmus paper turn in a base?
(A) Blue
(B) Red
(C) Yellow
(D) Green

8. Which pH value represents a strong base?
(A) 3
(B) 5
(C) 7
(D) 13

9. What happens when an acid reacts with a base?
(A) A combustion reaction occurs
(B) A precipitation reaction occurs
(C) A neutralization reaction occurs
(D) No reaction occurs

10. Which of the following household substances is acidic?
(A) Baking soda
(B) Vinegar
(C) Soap
(D) Ammonia