When 0.1 mol is oxidised, the quantity of electricity required to completely oxidise to is [2014]

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Solution

Q.
When 0.1 mol ${MnO}_{4}^{2 -}$ is oxidised, the quantity of electricity required to completely oxidise ${MnO}_{4}^{2 -}$ to ${MnO}_{4}^{-}$ is [2014]

1 96500 C

2 $2 \times 96500$ C

3 9650 C

4 96.50 C

Ans.
(3)

The oxidation reaction is

$\underset{0.1 mol}{\overset{+ 6}{M} {nO}_{4}^{2 -}} \to \underset{0.1 mol}{\overset{+ 7}{M} {nO}_{4}^{-}} + e^{-}$

$Q = 0.1 \times F = 0.1 \times 96500$ $C = 9650$ $C$

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