H₂O₂ is used as bleaching reagent because on dissociation it gives oxygen 
$\left({\mathrm{H}}_2{\mathrm{O}}_2⟶{\mathrm{H}}_2\mathrm{O}+\frac{1}{2}{\mathrm{O}}_2\right)$
If "Chachi 420" used H₂O₂ solution to bleach her hair & she required 2.24 L O₂ gas at 1 atm and 273 K. She has a H₂O₂ solution labelled as '5.6V' then what volume of such solution must she required to bleach her hair ?