MCQ
In basic medium $CrO _{4}^{2-}$ oxidises $S _{2} O _{3}^{2-}$ to form $SO _{4}^{2-}$ and itself changes into $Cr ( OH )_{4}^{-}$. The volume of $0.154\, M CrO _{4}^{2-}$ required to react with $40\, mL$ of $0.25\, M S _{2} O _{3}^{2-}$ is ........... $mL$
(Rounded-off to the nearest integer)
- A$170$
- ✓$173$
- C$181$
- D$141$
