First slide

Hydrogen Peroxide

Question

Consider the reactions :
A) H₂O₂ + 2HI → I₂ + 2H₂O
B) HOCl + H₂O → H₃O+ + Cl^– + O₂
Which of the following statements is correct about H₂O₂ with reference to these reactions? Hydrogen peroxide is ___

Easy

A

an oxidising agent in both (A) and (B)
B

an oxidising agent in (A) and reducing agent in (B)
C

a reducing agent in (A) and oxidising agent in (B)
D

a reducing agent in both (A) and (B)

Solution

In 1^st reaction H₂O₂ oxidises the $\mathop {HI}\limits^{ - 1}$ to $\mathop {I_2}\limits^{ o}$
$\therefore$ H₂O₂ acts as oxidising agent (O.A)
In 2^nd reaction H₂O₂ reduces the $\mathop {HI}\limits^{ + 1}$ to $\mathop {Cl}\limits^{^{ - 1} \ominus }$
$\therefore$ H₂O₂ acts as reducing agent.

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