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Question

Consider the following pairs of reactions and properties :
ReactionsProperties
I. \(\text{Fe} \, (s) + 2\text{HCl} \, (aq) \rightarrow \text{FeCl}_2 \, (aq) + \text{H}_2 \, (g)\)\(\text{Fe}\) is reductant
II. \(\text{Zn} \, (s) + \text{CuSO}_4 \, (aq) \rightarrow \text{ZnSO}_4 \, (aq) + \text{Cu} \, (s)\)\(\text{Cu}\) is being reduced
III. \(\text{Br}_2 \, (l) + 2\text{I}^- \, (aq) \rightarrow 2\text{Br}^- \, (aq) + \text{I}_2 \, (s)\)\(\text{Br}_2\) is reductant
IV. \(\text{CH}_4 \, (g) + 2\text{O}_2 \, (g) \rightarrow \text{CO}_2 \, (g) + 2\text{H}_2\text{O} \, (l)\)\(\text{C}\) atom in \(\text{CH}_4\) is oxidized

Which of the above pairs are correct?

This question was previously asked in
NDA 2 2026 GAT Question Paper (13-Sep-2026)
The correct answer is

I, II and IV

To determine which pairs of reactions and properties are correct, let's analyze each option individually:

  1. Reaction I: \(\text{Fe} \, (s) + 2\text{HCl} \, (aq) \rightarrow \text{FeCl}_2 \, (aq) + \text{H}_2 \, (g)\)
  2. Reaction II: \(\text{Zn} \, (s) + \text{CuSO}_4 \, (aq) \rightarrow \text{ZnSO}_4 \, (aq) + \text{Cu} \, (s)\)
  3. Reaction III: \(\text{Br}_2 \, (l) + 2\text{I}^- \, (aq) \rightarrow 2\text{Br}^- \, (aq) + \text{I}_2 \, (s)\)
  4. Reaction IV: \(\text{CH}_4 \, (g) + 2\text{O}_2 \, (g) \rightarrow \text{CO}_2 \, (g) + 2\text{H}_2\text{O} \, (l)\)

Based on the analysis, the correct pairs are I, II, and IV.

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Similar Questions

  1. In the following redox reaction, which compound is acting as a reducing agent ?
    \(N_2H_4 + 2H_2O_2 \rightarrow N_2 + 4H_2O\)
  2. Which of the following are oxidation reactions?
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    III. Rancidity of oils and fats
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    Select the correct answer using the code given below.

Important Questions from Redox Reactions

  1. Nitric acid is reduced to nitrogen dioxide in which of the following reactions?

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  5. The differences between crude birth rate and crude death rate in a population is called
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