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Hydrogen Peroxide

H2O2 is added...

Question

$H_{2} O_{2}$ is added to acidified KMnO $_{4}$ . In this reaction $H_{2} O_{2}$ acts as:

oxidising agent

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reducing agent

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a salt

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a base

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Solution

The correct option is D reducing agent
$K M n O_{4}$ acts as a stronger oxidising agent in acidic medium, therefore, $H_{2} O_{2}$ acts as a reducing agent.
Manganate(VII) ions, $M n O^{4 -}$ , oxidise hydrogen peroxide, $H_{2} O_{2}$ , to oxygen gas. During the reaction, the manganate(VII) ions are reduced to manganese(II) ions.

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