In which of the following reaction H 2 O 2 acts as a reducing agent ? (a) H 2 O 2 + 2 H + + 2 e − → 2 H 2 O (b) H 2 O 2 − 2 e − → O 2 + 2 H + (c) H 2 O 2 + 2 e − → 2 OH − (d) H 2

Question

In which of the following reaction H 2 ​ O 2 ​ acts as a reducing agent ? (a) H 2 ​ O 2 ​ + 2 H + + 2 e − → 2 H 2 ​ O (b) H 2 ​ O 2 ​ − 2 e − → O 2 ​ + 2 H + (c) H 2 ​ O 2 ​ + 2 e − → 2 OH − (d) H 2 ​ O 2 ​ + 2 OH − − 2 e − → O 2 ​ + 2 H 2 ​ O

TestHub · Accepted Answer

In H₂O₂, the oxidation state of oxygen is –1.

A reducing agent undergoes oxidation (loss of electrons).

$H_{2} O_{2} \to O_{2} + 2 H^{+} + 2 e^{-}$

Here, oxygen changes from –1 to 0, so H₂O₂ loses electrons and acts as a reducing agent.

Hence, reactions where H₂O₂ acts as a reducing agent are:

(b), (d)

Chemistry - Redox Reactions Question with Solution | TestHub

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