Question Paper
Class / Subject: Class 8 (ICSE) · Science
Chapter: Chapter 14 — Chapter 14: Chemical Reactions
Time Allowed: 32 minutes
Max Marks: 16
1. What is a combination reaction? [1]
(A) Substances combining into one product
(B) One substance breaking apart
(C) An element replacing another
(D) No reaction occurring
2. What is an example of a combination reaction? [1]
(A) Hydrogen and oxygen forming water
(B) Water breaking into hydrogen and oxygen
(C) Iron displacing copper
(D) Nothing specific
3. What is a decomposition reaction? [1]
(A) One substance breaking into simpler ones
(B) Substances combining
(C) An element replacing another
(D) No reaction occurring
4. What is an example of decomposition? [1]
(A) Water breaking into hydrogen and oxygen
(B) Hydrogen and oxygen forming water
(C) Iron displacing copper
(D) Nothing specific
5. What is a displacement reaction? [1]
(A) A reactive element replacing a less reactive one
(B) Substances simply combining
(C) One substance breaking apart randomly
(D) No reaction occurring
6. What is an example of displacement? [1]
(A) Iron displacing copper from copper sulfate
(B) Water forming from hydrogen and oxygen
(C) Water breaking apart
(D) Nothing specific
7. What are reactants? [1]
(A) Starting substances in a reaction
(B) Ending substances in a reaction
(C) Neither starting nor ending substances
(D) Substances unrelated to reactions
8. Why study reaction types? [1]
(A) To predict outcomes and identify patterns
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is a combination reaction? [1]
(A) Substances combining into one product
(B) One substance breaking apart
(C) An element replacing another
(D) No reaction occurring
10. What is an example of a combination reaction? [1]
(A) Hydrogen and oxygen forming water
(B) Water breaking into hydrogen and oxygen
(C) Iron displacing copper
(D) Nothing specific
11. What is a decomposition reaction? [1]
(A) One substance breaking into simpler ones
(B) Substances combining
(C) An element replacing another
(D) No reaction occurring
12. What is an example of decomposition? [1]
(A) Water breaking into hydrogen and oxygen
(B) Hydrogen and oxygen forming water
(C) Iron displacing copper
(D) Nothing specific
13. What is a displacement reaction? [1]
(A) A reactive element replacing a less reactive one
(B) Substances simply combining
(C) One substance breaking apart randomly
(D) No reaction occurring
14. What is an example of displacement? [1]
(A) Iron displacing copper from copper sulfate
(B) Water forming from hydrogen and oxygen
(C) Water breaking apart
(D) Nothing specific
15. What are reactants? [1]
(A) Starting substances in a reaction
(B) Ending substances in a reaction
(C) Neither starting nor ending substances
(D) Substances unrelated to reactions
16. Why study reaction types? [1]
(A) To predict outcomes and identify patterns
(B) No reason
(C) It's not useful
(D) Only for tests