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COMEDK2024ChemistryRedox Reactions

The equivalent weight of potassium permanganate in acid solution is

Options

  1. A158
  2. B31.6
  3. C52.16
  4. D79

Correct answer

B. 31.6

Step-by-step solution

In acidic medium, KMnO ₄ reacts as follows, aligned 2 KMnO ₄+3 H ₂ SO ₄ & ~K ₂ SO ₄+2 MnSO ₄ +3 H ₂ O & +5( O ) aligned Or MnO ₄⁻+8 H ⁺+5 e⁻ Mn ²⁺+4 H ₂ O equivalent weight of KMnO ₄= M 5 = 158 5 =31.6

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