Question

Number of coulombs of current required to convert completely convert one mole of

MnO${}_4^{-}$ ions in acid medium to one mole of Mn${}^{2+}$ ions electrolytically is:

• A. 96500
• B. 5x96500
• C. 96500x2
• D. 96500x6

Answer 1

The correct option is B 5x96500

$Mn{O}_4^{-}\to M{n}^{t2}+5e^{-}$
5 moles of $e^{-}$ are released
$\therefore$ 5 faraday of charge is released charge $=5\times 96500$

Hence, option B is correct.