Q .     In which of the fllowing reactions, `H_2O_2` behaves as a reducing agent?

UPSEE 2015
A

`Na_2SO_3(aq)+H_2O_2(aq)\rightarrow Na_2SO_4(aq)+H_2O(l)`

B

`PbO_2(s)+H_2O_2(aq)\rightarrow PbO(s)+H_2O(l)+O_2(g)`

C

`2KI(aq)+H_2O_2(aq)\rightarrow 2KOH(aq)+I_2(s)`

D

`KNO_2(aq)+H_2O_2(aq)\rightarrow KNO_3(aq)+H_2O(l)`

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