Question

$H_2{O}_2$ acts as an oxidising agent as well reducing agent, why?

Answer 1

$\stackrel{-1}{H_2{O}_2}⟶\stackrel{-2}{H_{2}O}+\stackrel{0}{O_2}$

$H_2{O}_2$ can be reduced to $H_{2}O$ as well as it can be oxidised to $O_2$. Hence, it can act as an oxidizing agent by itself getting reduced to $H_{2}O$ as well as it can act as a reducing agenct by getting oxidized to $O_2$. Therefore, it can act as oxidizing as well as reducing agent.