• # question_answer Which substance cannot be reduced by ${{H}_{2}}{{O}_{2}}$ A) $KMn{{O}_{4}}/{{H}_{2}}S{{O}_{4}}$ B) ${{K}_{2}}C{{r}_{2}}{{O}_{7}}/{{H}_{2}}S{{O}_{4}}$ C) $A{{g}_{2}}O$ D) $F{{e}^{3+}}$

$F{{e}^{+3}}$  cannot be reduced by ${{H}_{2}}{{O}_{2}}$ while all other get reduced.