Question Paper
Class / Subject: Class 8 (SSC) · Science (सामान्य विज्ञान)
Chapter: Chapter 13 — Chapter 13: Chemical Change and Chemical Bond
Time Allowed: 32 minutes
Max Marks: 16
1. What is a chemical change? [1]
(A) A reaction producing new substances
(B) No change in substance properties
(C) Only a physical change
(D) No new substances form
2. What is a sign of chemical change? [1]
(A) Colour change
(B) No signs at all
(C) Only size change
(D) Only shape change
3. What is another sign of chemical change? [1]
(A) Gas production
(B) Nothing observable
(C) Only colour, never gas
(D) Only weight change
4. What is a precipitate? [1]
(A) A solid forming from liquids in a reaction
(B) A type of gas
(C) A type of liquid only
(D) Nothing specific
5. What is an ionic bond? [1]
(A) A bond formed by electron transfer
(B) A bond formed by electron sharing
(C) No bond at all
(D) A physical connection only
6. What is a covalent bond? [1]
(A) A bond formed by electron sharing
(B) A bond formed by electron transfer
(C) No bond at all
(D) A physical connection only
7. What holds atoms together in compounds? [1]
(A) Chemical bonds
(B) Nothing holds them together
(C) Only gravity
(D) Only friction
8. Why learn about chemical change and bonds? [1]
(A) To understand how substances react and combine
(B) No reason
(C) It's not useful
(D) Only for tests
9. What is a chemical change? [1]
(A) A reaction producing new substances
(B) No change in substance properties
(C) Only a physical change
(D) No new substances form
10. What is a sign of chemical change? [1]
(A) Colour change
(B) No signs at all
(C) Only size change
(D) Only shape change
11. What is another sign of chemical change? [1]
(A) Gas production
(B) Nothing observable
(C) Only colour, never gas
(D) Only weight change
12. What is a precipitate? [1]
(A) A solid forming from liquids in a reaction
(B) A type of gas
(C) A type of liquid only
(D) Nothing specific
13. What is an ionic bond? [1]
(A) A bond formed by electron transfer
(B) A bond formed by electron sharing
(C) No bond at all
(D) A physical connection only
14. What is a covalent bond? [1]
(A) A bond formed by electron sharing
(B) A bond formed by electron transfer
(C) No bond at all
(D) A physical connection only
15. What holds atoms together in compounds? [1]
(A) Chemical bonds
(B) Nothing holds them together
(C) Only gravity
(D) Only friction
16. Why learn about chemical change and bonds? [1]
(A) To understand how substances react and combine
(B) No reason
(C) It's not useful
(D) Only for tests