Question Paper
Class / Subject: Class 10 (ICSE) · Chemistry
Chapter: Chapter 3 — Chapter 3: Study of Acids, Bases and Salts
Time Allowed: 32 minutes
Max Marks: 16
1. What does Arrhenius theory say about acids? [1]
(A) They release H+ ions in water
(B) They release OH- ions
(C) They have no ions
(D) They are always solid
2. What does Arrhenius theory say about bases? [1]
(A) They release OH- ions in water
(B) They release H+ ions
(C) They have no ions
(D) They are always solid
3. What colour change does an acid cause in blue litmus? [1]
(A) Turns it red
(B) Turns it blue
(C) No change
(D) Turns it green
4. What is neutralisation? [1]
(A) Acid + Base → Salt + Water
(B) Acid + Acid → Salt
(C) Base + Base → Salt
(D) No reaction occurs
5. What is the range of the pH scale? [1]
(A) 0-14
(B) 0-7
(C) 0-100
(D) 1-10
6. What pH value is neutral? [1]
(A) 7
(B) 0
(C) 14
(D) 1
7. What pH range indicates acidity? [1]
(A) Below 7
(B) Above 7
(C) Exactly 7
(D) Above 14
8. Why learn about acids, bases and salts? [1]
(A) Essential for understanding chemical reactions
(B) No reason
(C) It's not useful
(D) Only for tests
9. What does Arrhenius theory say about acids? [1]
(A) They release H+ ions in water
(B) They release OH- ions
(C) They have no ions
(D) They are always solid
10. What does Arrhenius theory say about bases? [1]
(A) They release OH- ions in water
(B) They release H+ ions
(C) They have no ions
(D) They are always solid
11. What colour change does an acid cause in blue litmus? [1]
(A) Turns it red
(B) Turns it blue
(C) No change
(D) Turns it green
12. What is neutralisation? [1]
(A) Acid + Base → Salt + Water
(B) Acid + Acid → Salt
(C) Base + Base → Salt
(D) No reaction occurs
13. What is the range of the pH scale? [1]
(A) 0-14
(B) 0-7
(C) 0-100
(D) 1-10
14. What pH value is neutral? [1]
(A) 7
(B) 0
(C) 14
(D) 1
15. What pH range indicates acidity? [1]
(A) Below 7
(B) Above 7
(C) Exactly 7
(D) Above 14
16. Why learn about acids, bases and salts? [1]
(A) Essential for understanding chemical reactions
(B) No reason
(C) It's not useful
(D) Only for tests