Chemistry - Redox Reactions Question with Solution | TestHub

In basic medium${\mathrm{CrO}}_4^{2-}$oxidises${\mathrm{S}}_2{\mathrm{O}}_3^{2-}$to form${{\mathrm{SO}}_4}^{2-}$and itself changes into$\mathrm{Cr}{\left(\mathrm{OH}\right)}_4^{-}$.The volume of$0.154{\mathrm{MCrO}}_4^{2-}$required to react with$40 \mathrm{mL}$of$0.25{\mathrm{MS}}_2{{\mathrm{O}}_3}^{2-}$is _____$\mathrm{mL}.$(Rounded-off to the nearest integer)