Which of the following yields $H_2O_2$ upon hydrolysis?

In which of the following reactions does $H_2O_2$ act as a reducing agent?
$(I)$ $H_2O_2 + 2H^{+} + 2e^- \to 2H_2O$
$(II)$ $H_2O_2 \to O_2 + 2H^{+} + 2e^-$
$(III)$ $H_2O_2 + 2e^- \to 2OH^{-}$
$(IV)$ $H_2O_2 + 2OH^{-} \to O_2 + 2H_2O + 2e^-$

$H_2O_2$ is a

Which one of the following reactions represents the oxidising property of $H_2O_2$?

Hydrogen peroxide is stored away from light because it can get decomposed when exposed to light as:

$H_2O_2$ acts as a reducing agent in