Which one of the following compounds is a peroxide?

Standard reduction potentials of the half reactions are given below:
${\mathrm{F}}_2\left(\mathrm{g}\right)+2{\mathrm{e}}^{-}\to 2{\mathrm{F}}^{-}\left(\mathrm{aq}\right); \mathrm{E}°=+2.85\mathrm{V}$
${\mathrm{Cl}}_2\left(\mathrm{g}\right)+2{\mathrm{e}}^{-}\to 2{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right); {\mathrm{E}}^{\mathrm{o}}=+1.36\mathrm{V}$
${\mathrm{Br}}_2\left(\mathrm{l}\right)+2{\mathrm{e}}^{-}\to 2{\mathrm{Br}}^{-}\left(\mathrm{aq}\right); {\mathrm{E}}^{\mathrm{o}}=+1.06\mathrm{V}$
${\mathrm{I}}_2\left(\mathrm{s}\right)+2{\mathrm{e}}^{-}\to 2{\mathrm{I}}^{-}\left(\mathrm{aq}\right); \mathrm{E}°=+0.53\mathrm{V}$
The strongest oxidising and reducing agents respectively are:

For decolorization of 1 mole of KMnO4, the  moles of H2O2 required is:

Which is the best description of the behaviour of bromine in the reaction given below?

${\mathrm{H}}_2\mathrm{O}+{\mathrm{Br}}_2⟶\mathrm{HOBr}+\mathrm{HBr}$