Question

In which of the following reaction hydrogen peroxide is a reducing agent.

• A. $2FeCl_{2} + 2HCl + H_{2}O_{2} \rightarrow 2FeCl_{3} + 2H_{2}O$
• B. $\mathbf{C}\mathbf{l}_{\mathbf{2}}\mathbf{+}\mathbf{H}_{\mathbf{2}}\mathbf{O}_{\mathbf{2}}\mathbf{\rightarrow}\mathbf{2HCl +}\mathbf{O}_{\mathbf{2}}$
• C. $2HI + H_{2}O_{2} \rightarrow 2H_{2}O + I_{2}$
• D. $H_{2}SO_{3} + H_{2}O_{2} \rightarrow H_{2}SO_{4} + H_{2}O$

Answer 1

Answer: (B)

$\mathbf{C}\mathbf{l}_{\mathbf{2}}\mathbf{+}\mathbf{H}_{\mathbf{2}}\mathbf{O}_{\mathbf{2}}\mathbf{\rightarrow}\mathbf{2HCl +}\mathbf{O}_{\mathbf{2}}$

Answer 2

$\underset{0}{Cl_{2}} + H_{2}O_{2} \rightarrow \underset{- 1}{2HCl} + O_{2}$

In this reaction $H_{2}O_{2}$ works as reducing agent.