Q. In which of the following reactions, $H_{2}O_{2}$ behaves as a reducing agent?
A) ${Na}_{2}{SO}_{3}(aq) + H_{2}O_{2}(aq) \rightarrow {Na}_{2}{SO}_{4}(aq) + H_{2}O(l)$
B) ${PbO}_{2}(s) + H_{2}O_{2}(aq) \rightarrow PbO(s) + H_{2}O(l) + O_{2}(g)$
C) $2KI(aq) + H_{2}O_{2}(aq) \rightarrow 2KOH(aq) + I_{2}(s)$
D) ${KNO}_{2}(aq) + H_{2}O_{2}(aq) \rightarrow {KNO}_{3}(aq) + H_{2}O(l)$
Explanation
The correct answer is Option B: ${PbO}_{2}(s) + H_{2}O_{2}(aq) \rightarrow PbO(s) + H_{2}O(l) + O_{2}(g)$.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.