MCQsCBSE Class 10 Science MCQs Chapter 1 Chemical Reactions and Equations with Answers

CBSE Class 10 Science MCQs Chapter 1 Chemical Reactions and Equations with Answers

Chemical Reactions and Equations: This article has 15 multiple-choice questions (MCQs) from Chapter 1 of the NCERT Class 10 Science book. It covers different parts of chemical reactions and how they’re used. These questions test what you’ve learned in this important chapter, helping you do well in science class.

This article explores chemical reactions with MCQs. They’re based on Chapter 1 of the NCERT Class 10 Science book and challenge your understanding of the subject. They’re great for students who want to do well in science class. Let’s learn about the basic ideas behind chemical changes and how they affect our lives.”

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    Class 10 Science MCQs – Chapter 1: Chemical Reactions and Equations

    Question: Which of the following is not a chemical change?

    1. Burning of paper
    2. Melting of ice
    3. Rusting of iron
    4. Digestion of food

    Answer: b) Melting of ice

    Question: In a chemical reaction, the substances before the reaction are called:

    1. Reactants
    2. Products
    3. Elements
    4. Compounds

    Answer: a) Reactants

    Question: Which of the following is a balanced chemical equation?

    1. H2 + O2 → H2O
    2. Fe + O2 → Fe2O3
    3. CaCO3 → CaO + CO2
    4. HCl + NaOH → NaCl + H2O

    Answer: d) HCl + NaOH → NaCl + H2O

    Question: What type of reaction is represented by the equation: 2H2 + O2 → 2H2O?

    1. Combination reaction
    2. Decomposition reaction
    3. Displacement reaction
    4. Double displacement reaction

    Answer: a) Combination reaction

    Question: Which of the following is a decomposition reaction?

    1. 2H2O → 2H2 + O2
    2. 2Na + Cl2 → 2NaCl
    3. CaCO3 → CaO + CO2
    4. AgNO3 + NaCl → AgCl + NaNO3

    Answer: c) CaCO3 → CaO + CO2

    Question: What is the product of the reaction between magnesium (Mg) and hydrochloric acid (HCl)?

    1. Mg(OH)2 + H2
    2. MgCl2 + H2
    3. MgO + H2O
    4. MgCO3 + H2

    Answer: b) MgCl2 + H2

    Question: What happens to the mass during a chemical reaction?

    1. It increases
    2. It decreases
    3. It remains the same
    4. It varies

    Answer: c) It remains the same

    Question: Which of the following statements is true about exothermic reactions?

    1. They absorb heat
    2. They release heat
    3. They occur at low temperatures
    4. They require energy input

    Answer: b) They release heat

    Question: Which of the following represents a single displacement reaction?

    1. FeS + 2HCl → FeCl2 + H2S
    2. Na2SO4 + BaCl2 → 2NaCl + BaSO4
    3. 2H2O → 2H2 + O2
    4. 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

    Answer: d) 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

    Question: What is the product of the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl)?

    1. NaCl + H2O
    2. NaOH + HCl
    3. Na2Cl + H2O
    4. NaOH + H2

    Answer: a) NaCl + H2O

    Question: What is the product of the reaction between magnesium (Mg) and hydrochloric acid (HCl)?

    • a) Mg(OH)2 + H2
    • b) MgCl2 + H2
    • c) MgO + H2O
    • d) MgCO3 + H2

    Answer: b) MgCl2 + H2

    Question: What happens to the mass during a chemical reaction?

    • a) It increases
    • b) It decreases
    • c) It remains the same
    • d) It varies

    Answer: c) It remains the same

    Question: Which of the following statements is true about exothermic reactions?

    • a) They absorb heat
    • b) They release heat
    • c) They occur at low temperatures
    • d) They require energy input

    Answer: b) They release heat

    Question: Which of the following represents a single displacement reaction?

    • a) FeS + 2HCl → FeCl2 + H2S
    • b) Na2SO4 + BaCl2 → 2NaCl + BaSO4
    • c) 2H2O → 2H2 + O2
    • d) 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

    Answer: d) 2AgNO3 + Zn → Zn(NO3)2 + 2Ag

    Question: What is the product of the reaction between sodium hydroxide (NaOH) and hydrochloric acid (HCl)?

    • a) NaCl + H2O
    • b) NaOH + HCl
    • c) Na2Cl + H2O
    • d) NaOH + H2

    Answer: a) NaCl + H2O

    Question: Which gas is evolved when zinc metal reacts with dilute sulfuric acid (H2SO4)?

    • a) Oxygen
    • b) Hydrogen
    • c) Carbon dioxide
    • d) Sulfur dioxide

    Answer: b) Hydrogen

    Question: What is the general formula for a neutralization reaction?

    • a) Acid + Metal → Salt + Hydrogen gas
    • b) Acid + Metal Oxide → Salt + Water
    • c) Acid + Base → Salt + Water
    • d) Acid + Carbonate → Salt + Water + Carbon dioxide

    Answer: c) Acid + Base → Salt + Water

    Question: What is the product formed when copper (II) oxide reacts with sulfuric acid (H2SO4)?

    • a) CuSO4 + H2O
    • b) Cu(OH)2 + H2O
    • c) CuSO4 + O2
    • d) CuO + H2O

    Answer: a) CuSO4 + H2O

    Question: What is the chemical formula of sodium chloride?

    • a) NaCl
    • b) Na2Cl
    • c) NaCl2
    • d) Na2Cl2

    Answer: a) NaCl

    Question: Which of the following statements is true about combustion reactions?

    • a) They involve the reaction of a metal with an acid
    • b) They involve the reaction of a non-metal with oxygen
    • c) They involve the reaction of a base with an acid
    • d) They involve the reaction of an acid with a carbonate

    Answer: b) They involve the reaction of a non-metal with oxygen

    What type of reaction is represented by the equation: 2Na + Cl2 → 2NaCl?

    • a) Combination reaction
    • b) Decomposition reaction
    • c) Displacement reaction
    • d) Double displacement reaction

    Answer: c) Displacement reaction

    What is the chemical formula of sulfur dioxide?

    • a) SO2
    • b) SO3
    • c) H2SO4
    • d) H2SO3

    Answer: a) SO2

    Which of the following is an example of a redox reaction?

    • a) CaCO3 → CaO + CO2
    • b) 2Na + Cl2 → 2NaCl
    • c) Fe + S → FeS
    • d) Zn + 2HCl → ZnCl2 + H2

    Answer: d) Zn + 2HCl → ZnCl2 + H2

    Question: What type of reaction is represented by the equation: CH4 + 2O2 → CO2 + 2H2O?

    • a) Combination reaction
    • b) Decomposition reaction
    • c) Displacement reaction
    • d) Combustion reaction

    Answer: d) Combustion reaction

    Question: What is the product formed when sodium carbonate (Na2CO3) reacts with hydrochloric acid (HCl)?

    • a) NaCl + CO2
    • b) NaCl + H2O + CO2
    • c) Na2Cl + H2O + CO2
    • d) NaHCO3 + Cl2

    Answer: b) NaCl + H2O + CO2

    Question: Which of the following is an example of a synthesis reaction?

    • a) CH4 + 2O2 → CO2 + 2H2O
    • b) CaCO3 → CaO + CO2
    • c) 2H2O → 2H2 + O2
    • d) 2H2 + O2 → 2H2O

    Answer: a) CH4 + 2O2 → CO2 + 2H2O

    Question: What is the product of the reaction between magnesium oxide (MgO) and hydrochloric acid (HCl)?

    • a) MgCl2 + H2
    • b) Mg(OH)2 + HCl
    • c) MgCl2 + H2O
    • d) Mg(OH)2 + H2O

    Answer: c) MgCl2 + H2O

    Question: What is the chemical formula of calcium oxide?

    • a) CaO
    • b) Ca(OH)2
    • c) CaCO3
    • d) CaSO4

    Answer: a) CaO

    Question: Which gas is produced when zinc carbonate (ZnCO3) decomposes upon heating?

    • a) Oxygen
    • b) Hydrogen
    • c) Carbon dioxide
    • d) Sulfur dioxide

    Answer: c) Carbon dioxide

    Question: What is the product formed when sulfur dioxide (SO2) reacts with water (H2O)?

    • a) H2SO4
    • b) H2SO3
    • c) H2S
    • d) H2O2

    Answer: b) H2SO3

    Question: Which of the following is an example of a precipitation reaction?

    • a) 2Na + Cl2 → 2NaCl
    • b) CaCO3 → CaO + CO2
    • c) Na2SO4 + BaCl2 → 2NaCl + BaSO4
    • d) 2H2O → 2H2 + O2

    Answer: c) Na2SO4 + BaCl2 → 2NaCl + BaSO4

    Question: What is the product formed when hydrogen peroxide (H2O2) decomposes?

    • a) H2O
    • b) O2
    • c) H2O + O2
    • d) H2 + O2

    Answer: c) H2O + O2

    Question: What is the chemical formula of hydrochloric acid?

    • a) HCl
    • b) H2SO4
    • c) HNO3
    • d) H2O2

    Answer: a) HCl

    Question: Which of the following is an example of a neutralization reaction?

    • a) CaCO3 → CaO + CO2
    • b) 2Na + Cl2 → 2NaCl
    • c) HCl + NaOH → NaCl + H2O
    • d) 2H2O → 2H2 + O2

    Answer: c) HCl + NaOH → NaCl + H2O

    Question: What is the product formed when potassium hydroxide (KOH) reacts with sulfuric acid (H2SO4)?

    • a) K2SO4 + H2O
    • b) K2SO4 + H2SO4
    • c) KOH + H2SO4
    • d) KHSO4 + H2O

    Answer: a) K2SO4 + H2O

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