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Electrochemical Series

Assertion : ...

Question

Assertion : $H_{2} O_{2}$ acts only as an oxidising agent.
$H_{2} O_{2} ⟶ H_{2} O + O$ Reason: All peroxides behaves as oxidising agents only.

A

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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B

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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C

Assertion is correct but Reason is incorrect

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D

Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
$H_{2} O_{2}$ acts both as an oxidising and a reducing agent.
$(H_{2} O_{2} ⟶ O_{2} + 2 H^{\oplus} + 2 e^{-})$
(Oxidation; acts as a reducing agent)
$(2 e^{-} + 2 H^{\oplus} + H_{2} O_{2} ⟶ 2 H_{2} O)$
(Reduction; acts as oxidising agent)
In $H_{2} O_{2}$ , the oxidation number of $O$ is -1. $O$ can have a minimum oxidation number of -2 and a maximum oxidation number of zero. The oxidation number can either decrease from -1 to -2 or can increase from -1 to zero.
All peroxides can act either as an oxidising agent or as a reducing agent or both.

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