Chapter 1 of class 10 science as per the NCERT syllabus is Chemical Reactions and Equations which deals with combination reactions, decomposition reactions, displacement reactions, double displacement reactions, balancing chemical equations, types of chemical equations, oxidation and reduction reactions, corrosion & rusting, etc.
Here, we have discussed 30 Multiple Choice Questions based on these topics of the chapter. These questions will help you to learn more about the chapter.
For each question below, there are four options out of which only one option is correct. The correct answer to each question is given at the end for your reference.
MCQ on Class 10 Science Chapter 1
1. Which of the following is a chemical change?
a) Melting of ice
b) Dissolving sugar in water
c) Burning of wood
d) Boiling of water
2. What type of reaction is represented by the equation: 2H₂ + O₂ → 2H₂O?
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double displacement reaction
3. Which of the following equations represents a decomposition reaction?
a) 2H₂ + O₂ → 2H₂O
b) 2KClO₃ → 2KCl + 3O₂
c) Fe + CuSO₄ → FeSO₄ + Cu
d) CaCO₃ → CaO + CO₂
4. In the equation: CH₄ + 2O₂ → CO₂ + 2H₂O, which element undergoes oxidation?
a) Carbon
b) Hydrogen
c) Oxygen
d) None of the above
5. What is the coefficient of HCl when the following equation is balanced? Mg + HCl → MgCl₂ + H₂
a) 1
b) 2
c) 3
d) 4
6. Which of the following represents a double displacement reaction?
a) Zn + HCl → ZnCl₂ + H₂
b) Na₂CO₃ + 2HCl → 2NaCl + CO₂ + H₂O
c) CuSO₄ + Zn → ZnSO₄ + Cu
d) AgNO₃ + NaCl → AgCl + NaNO₃
7. What type of reaction is represented by the equation: 2Fe + 3Cl₂ → 2FeCl₃?
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double displacement reaction
8. Which of the following is a balanced chemical equation?
a) H₂ + O₂ → H₂O
b) CO₂ + H₂O → H₂CO₃
c) CH₄ + 2O₂ → CO₂ + 2H₂O
d) Mg + HCl → MgCl₂ + H₂
9. What is the product formed when calcium carbonate decomposes upon heating?
a) CaO + CO₂
b) Ca(OH)₂ + CO₂
c) CaCO₃ + H₂O
d) CaCO₃ + O₂
10. Which of the following statements is true regarding a redox reaction?
a) Oxygen is always reduced.
b) Reduction and oxidation occur simultaneously.
c) Reduction and oxidation never occur together.
d) Only one substance undergoes either reduction or oxidation.
11. What is the product formed when copper(II) oxide undergoes reduction?
a) Cu₂O
b) Cu
c) CO₂
d) CuO₂
12. Which of the following is a balanced equation for the reaction between sodium hydroxide and hydrochloric acid?
a) NaOH + HCl → NaCl + H₂O
b) NaOH + HCl → NaCl + H₂O₂
c) NaOH + HCl → NaCl₂ + H₂O
d) NaOH + HCl → NaCl₂ + H₂
13. What is the product formed when iron reacts with oxygen in the presence of moisture?
a) FeO
b) Fe₂O₃
c) Fe₃O₄
d) Fe(OH)₃
14. Which of the following is not a chemical change?
a) Burning of a candle
b) Digestion of food
c) Melting of ice
d) Rusting of iron
15. Which of the following statements is true regarding a displacement reaction?
a) Two elements exchange ions.
b) A more reactive element displaces a less reactive element from its compound.
c) Only one element participates in the reaction.
d) No ions are involved in the reaction.
16. What is the product formed when zinc reacts with hydrochloric acid?
a) ZnCl₂ + H₂O
b) Zn + HCl
c) ZnCl₃ + H₂
d) ZnO + HCl
17. Which of the following statements is true regarding a combination reaction?
a) One reactant breaks down into two or more products.
b) Two or more reactants combine to form a single product.
c) A metal displaces a less reactive metal from its compound.
d) No new substances are formed.
18. What type of reaction is represented by the equation: C₆H₁₂O₆ → 2C₂H₅OH + 2CO₂?
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double displacement reaction
19. In the reaction: 2Al + 3FeO → 3Fe + Al₂O₃, which substance is oxidized?
a) Al
b) Fe
c) FeO
d) Al₂O₃
20. What is the product formed when sodium reacts with water?
a) NaOH + H₂
b) Na₂O + H₂O
c) NaH + O₂
d) NaCl + H₂O
21. What is the product formed when magnesium reacts with hydrochloric acid?
a) MgCl₂ + H₂O
b) MgO + HCl
c) MgCl₃ + H₂
d) MgCl + H₂O
22. Which of the following is an example of a combustion reaction?
a) 2H₂ + O₂ → 2H₂O
b) CH₄ + 2O₂ → CO₂ + 2H₂O
c) Fe + HCl → FeCl₂ + H₂
d) Zn + CuSO₄ → ZnSO₄ + Cu
23. In the reaction: 2Na + Cl₂ → 2NaCl, which substance undergoes reduction?
a) Na
b) Cl₂
c) NaCl
d) None undergoes reduction
24. Which of the following represents a displacement reaction?
a) CaCO₃ → CaO + CO₂
b) Na + H₂O → NaOH + H₂
c) 2H₂ + O₂ → 2H₂O
d) CuSO₄ + 2NaOH → Cu(OH)₂ + Na₂SO₄
25. What is the product formed when sulfur dioxide reacts with oxygen in the air?
a) SO₃
b) SO₄
c) SO₂O
d) SO₅
26. Which of the following is a balanced chemical equation for the reaction between sulfuric acid and calcium hydroxide?
a) H₂SO₄ + Ca(OH)₂ → CaSO₄ + H₂O
b) H₂SO₄ + Ca(OH)₂ → CaSO₃ + H₂O
c) H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O
d) H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂
27. Which of the following statements is true regarding a decomposition reaction?
a) It involves the combination of two or more substances to form a single product.
b) It involves the breakdown of a single reactant into two or more products.
c) It involves the exchange of ions between reactants.
d) It involves the displacement of one element by another in a compound.
28. What type of reaction is represented by the equation: 2NaCl + H₂SO₄ → 2HCl + Na₂SO₄?
a) Combination reaction
b) Decomposition reaction
c) Displacement reaction
d) Double displacement reaction
29. What is the product formed when copper reacts with nitric acid?
a) Cu(NO₃)₂ + H₂
b) Cu(NO₃)₃ + H₂O
c) CuO + HNO₃
d) Cu(NO₃)₂ + H₂O
30. Which of the following is not a characteristic of a chemical change?
a) Formation of a new substance
b) Change in color
c) Change in state
d) Reversible reaction
Correct Answers
Q1: c) Burning of wood
Q2: a) Combination reaction
Q3: d) CaCO₃ → CaO + CO₂
Q4: a) Carbon
Q5: a) 2
Q6: d) AgNO₃ + NaCl → AgCl + NaNO₃
Q7: c) Displacement reaction
Q8: c) CH₄ + 2O₂ → CO₂ + 2H₂O
Q9: a) CaO + CO₂
Q10: b) Reduction and oxidation occur simultaneously.
Q11: b) Cu
Q12: a) NaOH + HCl → NaCl + H₂O
Q13: b) Fe₂O₃
Q14: c) Melting of ice
Q15: b) A more reactive element displaces a less reactive element from its compound.
Q16: a) ZnCl₂ + H
Q17: b) Two or more reactants combine to form a single product.
Q18: b) Decomposition reaction
Q19: b) Fe
Q20: a) NaOH + H₂
Q21: a) MgCl₂ + H₂
Q22: b) CH₄ + 2O₂ → CO₂ + 2H₂O
Q23: b) Cl₂
Q24: b) Na + H₂O → NaOH + H₂
Q25: a) SO₃
Q26: c) H₂SO₄ + Ca(OH)₂ → CaSO₄ + 2H₂O
Q27: b) It involves the breakdown of a single reactant into two or more products.
Q28: d) Double displacement reaction
Q29: a) Cu(NO₃)₂ + H₂
Q30: d) Reversible reaction
The Bottom Line
I hope these 30 MCQs on Chemical Reactions and Equations of Class 10 Science have helped you in your studies and preparation.
If you have any queries, or comments or find any mistake in the above questions, feel free to contact me in the comment section below.
I would love to hear from you.
Abdur Rohman is an Electrical Engineer from Charaideo, Assam, who wears multiple hats as a part-time teacher, blogger, entrepreneur, and digital marketer. Passionate about education, he founded The Assam School blog to provide free, comprehensive textbook solutions, MCQs (Multiple Choice Questions), and other academic content for students from Class V to XII.