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JEE Main2014ChemistryHydrogenActual

Hydrogen peroxide acts both as an oxidising and as a reducing agent depending upon the nature of the reacting species. In which of the following cases H ₂ O ₂ acts as a reducing agent in acid medium?

Options

  1. AMnO ₄⁻
  2. BCr ₂ O ₇²⁻
  3. CSO ₃²⁻
  4. DKI

Correct answer

A. MnO ₄⁻

Step-by-step solution

H ₂ O ₂ acts as a reducing agent only in presence of strong oxidising agents (i.e., . MnO ₄⁻ ) in acidic as well as alkaline medium. aligned &2 KMnO ₄+3 H ₂ SO ₄+5 H ₂ O ₂ & K ₂ SO ₄+2 MnSO ₄+8 H ₂ O +5 O ₂ aligned

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