Which statement regarding $H_2O_2$ is correct?

The covalent radius of oxygen is measured in:

Which of the following equations depicts the oxidizing nature of $H_{2}O_{2}$?

The strength in volumes of a solution containing $30.36 \ g/L$ of $H_2O_2$ is

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

The last drop of water can be removed from $H_2O_2$ by :-