• # question_answer   In which of the following reactions. Hydrogen peroxide acts as a reducing agent? A) $2KI+{{H}_{2}}{{O}_{2}}+{{H}_{2}}S{{O}_{4}}\to {{K}_{2}}S{{O}_{4}}+{{I}_{2}}+{{H}_{2}}O$B) $A{{g}_{2}}O(moist)+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}$C) $N{{a}_{2}}S{{O}_{3}}+{{H}_{2}}{{O}_{2}}\to N{{a}_{2}}S{{O}_{4}}+{{H}_{2}}O$D) $PbS+4{{H}_{2}}{{O}_{2}}\to PbS{{O}_{4}}+4{{H}_{2}}O$

$A{{g}_{2}}O+{{H}_{2}}{{O}_{2}}\to 2Ag+{{H}_{2}}O+{{O}_{2}}$ Here${{H}_{2}}{{O}_{2}}$reduces $A{{g}_{2}}O$into Ag while in all other cases ${{H}_{2}}{{O}_{2}}$acts as an oxidant. Hence, the correct option is (b).