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KMnO 4 decomposes on heating at 513 K to form O 2 along with

Options

  1. AMnO 2 & K 2 O 2
  2. BK 2 MnO 4 & Mn
  3. CMn & KO 2
  4. DK 2 MnO 4 & MnO 2

Correct answer

D. K 2 MnO 4 & MnO 2

Step-by-step solution

Potassium permanganate decomposes when heated, the oxidation state of manganese changes as the oxidation state of KMnO 4 is + 7 decomposes to potassium manganate which oxidation state is + 6 and manganese dioxide its oxidation state is + 4 . It is a redox reaction in which Mn which undergo both oxidation and reduction such type of reaction is known as a disproportionation reaction. 2 KMnO 4 → 513 K K 2 MnO 4 + MnO 2 + O 2

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