Question

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

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

Answer 1

The correct option is C 20F

$16O{H}^{-1}+M{n}_3{O}_4⟶3Mn{O_4}^{2-}+8H_{2}O+10e^{-}$

For 1 mol electron required is$=10$

or $2mol=2\times 10=20$

$\therefore$ Charge required$=20\times F$

$=20F$