Which one of the following is reduced by hydrogen peroxide in acid medium?

Potassium permanganate

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Potassium iodide

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Ferrous sulphate

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Potassium ferrocyanide

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Solution

The correct option is A Potassium permanganate
$H_{2} O_{2}$ reduce acidified $K M n O_{4}$ solution. As a result. The pink colour of $K M n O_{4}$ is changed .

$2 K M + 7 n O_{4} + 5 H_{2} O_{2} + 3 H_{2} S O_{4} \to 5 O_{2} + 2 M + 2 n S O_{4} + K_{2} S O_{4} + 8 H_{2} O$

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