First slide

Hydrogen Peroxide

Question

In which of the following reactions, H₂O₂ acts as a reducing agent

Moderate

A

${PbO}_{2} (s) + H_{2} O_{2} (aq) \to PbO (s) + H_{2} O (l) + O_{2} (g)$
B

${Na}_{2} {SO}_{3} (aq) + H_{2} O_{2} (aq) \to {Na}_{2} {SO}_{4} (aq) + H_{2} O (l)$
C

$2 KI (aq) + H_{2} O_{2} (aq) \to 2 KOH (aq) + I_{2} (s)$
D

${KNO}_{2} (aq) + H_{2} O_{2} (aq) \to {KNO}_{3} (aq) + H_{2} O (l)$

Solution

In the following reaction, $H_{2} O_{2}$ acts as a reducing agent.
${PbO}_{2} (s) + H_{2} O_{2} (aq) \to PbO (s) + H_{2} O (l) + O_{2} (g)$

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