When $CO_2$ is bubbled through a solution of barium peroxide in water:

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

In which of the following reactions does $H_2O_2$ act as an oxidising agent (either in acidic,alkaline,or neutral medium)?
$(i)$ $2Fe^{2+} + H_2O_2 \rightarrow$
$(ii)$ $2MnO_4^{-} + 6H^{+} + 5H_2O_2 \rightarrow$
$(iii)$ $I_2 + H_2O_2 + 2OH^{-} \rightarrow$
$(iv)$ $Mn^{2+} + H_2O_2 \rightarrow$

$H_2O_2$ in basic medium reduces $I_2$ to form:

How should $H_2O_2$ be stored?

In the laboratory, $H_2O_2$ is prepared by: