Question

In which of the following reactions, $H_{2}O_{2}$ acts as a reducing agent.

• A. $PbO_{2}(s) + H_{2}O_{2}(aq) \rightarrow PbO(s) + H_{2}O(l) + O_{2}(g)$
• B. $Na_{2}SO_{3}(aq) + H_{2}O_{2}(aq) \rightarrow Na_{2}SO_{4}(aq) + H_{2}O(l)$
• C. $2Kl(aq) + H_{2}O_{2}(aq) \rightarrow 2KOH(aq) + I_{2}(s)$
• D. $KNO_{2}(aq) + H_{2}O_{2}(aq) \rightarrow KNO_{3}(aq) + H_{2}O(l)$

Answer 1

Answer: (A)

$PbO_{2}(s) + H_{2}O_{2}(aq) \rightarrow PbO(s) + H_{2}O(l) + O_{2}(g)$

Answer 2

In the following reaction $H_{2}O_{2}$ acts as a reducing agent

$PbO_{2}(s) + H_{2}O_{2}(aq) \rightarrow PbO(s) + H_{2}O(l) + O_{2}(g)$