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Preparation of Hydrogen

Which substan...

Question

Which substance cannot be reduced by $H_{2} O_{2}$

A

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B

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C

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D

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Solution

The correct option is D

$F e^{+ 2}$ salts are converted to ferric salts by action of hydrogen peroxide where $H_{2} O_{2}$ acts as an oxidising agent.

$2 F e^{2 +}$ --> $2 F e^{3 +}$ +2e^-
$H_{2} O_{2}$ + $2 H^{+}$ + $2 H^{-}$ --> $2 H_{2} O$
-------------------------------------------------
$2 F e^{2 +}$ + $H_{2} O_{2}$ + $2 H^{+}$ --> $2 F e^{3 +}$ + $2 H_{2} O$

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