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JEE Advanced · 2009 · 12 Apr 2009 · Paper 2 · d and f Block Elements

The oxidation number of Mn in the product of alkaline oxidative fusion of

MnO_{2}

is

Answer: 6

Solution

Alkaline oxidative fusion of

MnO_{2}

produces potassium manganate:

2 MnO_{2} + 4 KOH + O_{2} \to 2 K_{2} MnO_{4} + 2 H_{2} O

In

K_{2} MnO_{4}

, let oxidation state of Mn be x:

2 (+ 1) + x + 4 (- 2) = 0

x = + 6

JEE Advanced · 2009 · 12 Apr 2009 · Paper 2 · Integer answer

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