The following is a partial redox equation: MnO−4+8H++xe−⟶

Question -

The following is a partial redox equation:
$M n O_{4}^{-} + 8 H^{+} + x e^{-} ⟶ M n^{2 +} + 4 H_{2} O$
The value of the coefficient 'x' is:

Options:

A . 5

B . 3

C . 1

D . 0

Answer: Option A
:
A
When you account for the change in the oxidation number of Manganese on either side:

M n O_{4}^{-} + 8 H^{+} + 5 e^{-} ⟶ M n^{2 +} + 4 H_{2} O

x = 5.

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