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COMEDK2021ChemistryRedox Reactions

For decolourisation of 1 mole of KMnO ₄ , the moles of H ₂ O ₂ required is

Options

  1. A1 2
  2. B3 2
  3. C5 2
  4. D7 2

Correct answer

C. 5 2

Step-by-step solution

The redox reaction between potassium permanganate and hydrogen peroxide in an acidic medium is given by the following balanced chemical equation: 2KMnO₄ + 3H₂ SO₄ + 5H₂ O₂ K₂ SO₄ + 2MnSO₄ + 8H₂ O + 5O₂ From the stoichiometry of the balanced equation, 2 moles of KMnO₄ react with 5 moles of H₂ O₂ . Therefore, for 1 mole of KMnO₄ , the moles of H₂ O₂ required is 5 2 . Answer: 5 2

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