Question

Which one of the following reactions indicates the reducing ability of hydrogen peroxide in basic medium ?

• A. $HOCl + H _{2} O _{2} \rightarrow H _{3} O ^{+}+ Cl ^{-}+ O _{2}$
• B. $PbS +4 H _{2} O _{2} \rightarrow PbSO _{4}+4 H _{2} O$
• C. $2 MnO _{4}^{-}+3 H _{2} O _{2} \rightarrow 2 MnO _{2}+3 O _{2}+2 H _{2} O +2 OH ^{-}$
• D. $Mn ^{2+}+ H _{2} O _{2} \rightarrow Mn ^{4+}+2 OH ^{-}$

Answer 1

Answer: (C)

In option (A) and $(C)$ reducing action of hydrogen peroxide is shown.
In option (A) it is in acidic medium, in option (B) it is in basic medium. or
For reducing ability $H _{2} O _{2}$ changes to $O _{2}$, i.e. oxidize, so in option ' $A ^{\prime} \& C ^{\prime} O _{2}$ is formed but ' $A$ ' is in acidic medium so option - $C$ correct.