Question Paper
Class / Subject: Class 10 (SSC) · Science and Technology (विज्ञान आणि तंत्रज्ञान)
Chapter: Chapter 3 — Chapter 3: Chemical Reactions and Equations
Time Allowed: 32 minutes
Max Marks: 16
1. What does a chemical equation represent? [1]
(A) A chemical reaction using symbols
(B) A physical change only
(C) A mathematical equation only
(D) Nothing chemical
2. What are on the left side of an equation? [1]
(A) Reactants
(B) Products
(C) Neither reactants nor products
(D) Only catalysts
3. What are on the right side of an equation? [1]
(A) Products
(B) Reactants
(C) Neither reactants nor products
(D) Only catalysts
4. What does balancing an equation ensure? [1]
(A) Equal atoms of each element on both sides
(B) Unequal atoms on both sides
(C) No atoms on either side
(D) Random atom counts
5. What law does balancing follow? [1]
(A) Law of conservation of mass
(B) Law of conservation of energy only
(C) No specific law
(D) Newton's law
6. What is a combination reaction? [1]
(A) Two or more substances combining into one
(B) A substance breaking into parts
(C) One element replacing another
(D) No specific type
7. What is a decomposition reaction? [1]
(A) A substance breaking into simpler parts
(B) Substances combining
(C) Elements displacing each other
(D) No specific type
8. Why learn about chemical reactions and equations? [1]
(A) To predict products and understand chemical processes
(B) No reason
(C) It's not useful
(D) Only for tests
9. What does a chemical equation represent? [1]
(A) A chemical reaction using symbols
(B) A physical change only
(C) A mathematical equation only
(D) Nothing chemical
10. What are on the left side of an equation? [1]
(A) Reactants
(B) Products
(C) Neither reactants nor products
(D) Only catalysts
11. What are on the right side of an equation? [1]
(A) Products
(B) Reactants
(C) Neither reactants nor products
(D) Only catalysts
12. What does balancing an equation ensure? [1]
(A) Equal atoms of each element on both sides
(B) Unequal atoms on both sides
(C) No atoms on either side
(D) Random atom counts
13. What law does balancing follow? [1]
(A) Law of conservation of mass
(B) Law of conservation of energy only
(C) No specific law
(D) Newton's law
14. What is a combination reaction? [1]
(A) Two or more substances combining into one
(B) A substance breaking into parts
(C) One element replacing another
(D) No specific type
15. What is a decomposition reaction? [1]
(A) A substance breaking into simpler parts
(B) Substances combining
(C) Elements displacing each other
(D) No specific type
16. Why learn about chemical reactions and equations? [1]
(A) To predict products and understand chemical processes
(B) No reason
(C) It's not useful
(D) Only for tests