Chemistry - Complete s-block Question with Solution | TestHub

$\mathrm{K}{\mathrm{O}}_2$will liberate oxygen when reacts with ice cold water as follows
$2{\mathrm{O}}_2^{-}+2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to 2\mathrm{O}{\mathrm{H}}^{-}\left(\mathrm{a}\mathrm{q}\right)+{\mathrm{H}}_2{\mathrm{O}}_2\left(\mathrm{l}\right)+{\mathrm{O}}_2\left(\mathrm{g}\right)$