In which of the following reactions. does hydrogen peroxide act as a reducing agent?
A. \(\mathrm{PbO}_{2}+2 \mathrm{HNO}_{3}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow\) \(\mathrm{Pb}\left(\mathrm{NO}_{2} \right)_{3}+2 \mathrm{H}_{2} \mathrm{O}+\mathrm{O}_{2}\)
B. \(\mathrm{H}_{2} \mathrm{~S}-\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{S}+2 \mathrm{H}_{2} \mathrm{O}\)
C. \(\mathrm{PbSO}_{2}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{PbSO}_{4}+\mathrm{H}_{2} \mathrm{O}\)
D. \(2 \mathrm{I}+2 \mathrm{H}+\mathrm{H}, \mathrm{O}, \rightarrow \mathrm{I},+2 \mathrm{H}, \mathrm{O}\)
Correct Answer: A
