in which of the following reactions,` H_2O_2` is acting as a reducing agent?

Options

A. `SO_2 + H_2O_2 rarr H_2SO_4`
B. `2KI + H_2O_2 rarr 2KOH +I_2`
C. `PbS + 4H_2O_2 rarr PbSO_4 + 4H_2O`
D. `Ag_2O +H_2O_2 rarr 2Ag +H_2O + O_2`

Answer

D

Explanation

Oxidising nature
`SO_(2) +H_(2) O_(2) rarr H_(2)SO_(4)`
`2KI +H_(2)O_(2) rarr 2KOH +I_2`
`PbS+4H_2O_2 rarr PbSO_(4)+4H_2O`
Reducing nature
`Ag_(2)O+H_2O_2 rarr 2Ag +H_2O+O_2`