Assertion and Reason Questions for Class 11 Chemistry Chapter 8 Redox Reactions

Assertion and Reason Questions for Class 11 Chemistry Chapter 8 Redox Reactions

Directions:
(a) Assertion is correct, reason is correct; reason is a correct explanation for assertion.
(b) Assertion is correct, reason is correct; reason is not a correct explanation for assertion
(c) Assertion is correct, reason is incorrect
(d) Assertion is incorrect, reason is correct.

Q.1. Assertion: In a reaction
Zn(s) + CuSO4 (aq) → ZnSO₄(aq) + Cu(s)
Zn is a reductant but itself get oxidized.
Reason: In a redox reaction, oxidant is reduced by accepting electrons and reductant is oxidized by losing electrons.

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Answer: (a)

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Q.2. Assertion: HClO₄ is a stronger acid than HClO₃.
Reason: Oxidation state of Cl in HClO₄ is +VII and in HClO₃ +V.

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Answer: (b)

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Q.3. Assertion: In the reaction 2Na(s) + Cl₂(g) → 2NaCl(s) sodium is oxidised.
Reason: Sodium acts as an oxidising agent in given reaction.

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Answer: (c)

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Q.4. Assertion: The reaction:
CaCO₃(s) → CaO(s) + CO₂ (g) is an example of decomposition reaction.
Reason: Above reaction is not a redox reaction.

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Answer: (b)

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