Question

Total charge required to convert three moles of $M{n}_3{O}_4$ to $Mn{O}_4^{-}$ in alkaline medium will be:

• A. $10F$
• B. $20F$
• C. $30F$
• D. $40F$

Answer 1

The correct option is C $30F$

$(M{n}^{3/+8}{)}_3\to 3M{n}^{6+}+10e^{-}$
$\therefore$ 10 Faraday charge is required for conversion of 1 mol of $M{n}_3{O}_{4}toMn{O}_4^{2-}$
so 30 faraday charge is required for 3 mole.