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AIIMS2003Chemistryd and f Block Elements

MnO ₄²⁻(1 mole) in neutral aqueous medium is disproportionated to

Options

  1. A2/3 mole of MnO ₄⁻ and 1 / 3 mole of MnO ₂
  2. B1 / 3 mole of MnO ₄⁻ and 2 / 3 ~mole of MnO ₂
  3. C1 / 3 mole of Mn ₂ O ₇ and 1 / 3 ~mole of MnO ₂
  4. D2 / 3 ~mole of Mn ₂ O ₇ and 1 / 3 mole of MnO ₂ .

Correct answer

A. 2/3 mole of MnO ₄⁻ and 1 / 3 mole of MnO ₂

Step-by-step solution

3 MnO ₄ ²⁻+2 H ₂ O MnO _ 2(s) +2 MnO ₄⁻+4 OH ⁻ for one mole MnO ₄²⁻+ 2 3 H ₂ O 1 3 MnO _ 2(s) + 2 3 MnO ₄⁻+ 4 3 OH ⁻

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