In which of the following reactions, H2O2 acts as oxidising agent ?

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In which of the following reactions, H₂O₂ acts as oxidising agent ?

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${Cl}_{2} + H_{2} O_{2} ⟶ 2 HCl + O_{2}$

$2 NaOH + H_{2} O_{2} ⟶ {Na}_{2} O_{2} + 2 H_{2} O$

${Ag}_{2} O + H_{2} O_{2} ⟶ 2 Ag + H_{2} O + O_{2}$

${KNO}_{2} + H_{2} O_{2} ⟶ {KNO}_{3} + H_{2} O$

answer is D.

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Detailed Solution

${KNO}_{2} + H_{2} O_{2} \to {KNO}_{3} + H_{2} O$

Hydrogen peroxide acts as an oxidizing agent. It oxidizes ${KNO}_{2}$ to KNO₃. The oxidation state of N increases from +3 to +5.

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