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KVPY2015ChemistryRedox Reactions

MnO ₂ when fused with KOH and oxidized in air gives a dark green compound X . In acidic X . In acidic solution, X undergoes disproportion to give an intense purple compound Y and MnO ₂ . The compounds X and Y . respectively, are

Options

  1. AK ₂ MnO ₄ and KMnO ₄
  2. BMn ₂ O ₇ and KMnO ₄
  3. CK ₂ MnO ₄ and Mn ₂ O ₇
  4. DKMnO ₄ and K ₂ MnO ₄

Correct answer

A. K ₂ MnO ₄ and KMnO ₄

Step-by-step solution

2 MnO ₂+4 KOH + O ₂ 2 ~K ₂ MnO ₄+2 H ₂ O 3 ~K ₂ MnO ₄+4 HCl 2 KMnO ₄+ MnO ₂+4 KCl +2 H ₂ O

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