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Question 700010
JEE Chemistry · Medium

Redox Reactions: Comproportionation MCQ

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ComproportionationMediumQuestion 700010

Question

In the reaction I₂ + 2S₂O₃²⁻ → 2I⁻ + S₄O₆²⁻, I₂ acts as:
  1. A
    Oxidising agent
    Correct
  2. B
    Reducing agent
  3. C
    Both
  4. D
    Neither

Correct answer

Oxidising agent

Explanation

I in I₂ is 0. In I⁻ it is −1 (gained electrons = reduced). So I₂ is the oxidising agent. S in S₂O₃²⁻ is +2; in S₄O₆²⁻ it is +2.5 (lost electrons = oxidised). So S₂O₃²⁻ is the reducing agent.

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