Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?

{M n}^{2 +}

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I_{2}

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P b S

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{F e}^{2 +}

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Solution

The correct option is B $I_{2}$
$I_{2} (s) + H_{2} O_{2} (a q) + 2 {O H}^{-} ⟶ 2 I^{-} (a q) + 2 H_{2} O (l) + O_{2}$

$H_{2} O_{2}$ reduces iodine to iodide solution in an alkaline medium.

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