The correct statements among the following is

Moderate

A

charge required for the oxidation or reduction of a substance depends upon the stoichiometry of the electrode reaction
B

2 moles of electrons are required for the reduction of 1 mole of calcium ion
C

50,000 A current is equal to 0.518 F per second
D

Charge required for reducing 1 mole of ${MnO}_{4}^{-}$ in to ${Mn}^{2 +} is 4.28 \times 10^{5} C$

Solution

$\begin{array}{l} {MnO}_{4}^{-} + 5 e^{-} ⟶ {Mn}^{2 +} \\ 5 e^{-} \equiv 5 F = 5 \times 96500 = 4 .82 \times 10^{5} C \end{array}$

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