Which of the following can reduce the decomposition of $H_2O_2$ on exposure to light?

$H_2O_2$ restores the color of old lead paintings,blackened by the action of $H_2S$ gas by:

When $2-$ethylanthraquinol dissolved in a mixture of benzene and cyclohexanol is oxidised,the product is

Which of the following statements regarding $H_2O_2$ is correct?

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

Consider the following statements:
Statement-$I$: $H_2O_2$ acts as an oxidising as well as a reducing agent in both acidic and basic media.
Statement-$II$: $10 \ V \ H_2O_2$ sample means it contains $3.03\% \ (w/v) \ H_2O_2$.