Question

Total charge required for the oxidation of two moles $M{n}_3{O}_4$ into $Mn{O}_4^{2-}$ in presence of alkaline medium is

• A. 5 F
• B. 10 F
• C. 20 F
• D. None of these

Answer 1

Answer: (C)

1 mole $M{n}_3{O}_{4}lose\left(6-\frac{8}{3}\right)\times 3=10$ mole $e^{-}$ ,
so total charge required $=2\times 10=20F$