The reaction at cathode in the cells commonly used in clocks invo… - Vidyadip

MCQ

The reaction at cathode in the cells commonly used in clocks involves.

✓
reduction of $\mathrm{Mn}$ from $+4 to +3$
B
oxidation of $\mathrm{Mn}$ from $+3 to +4$
C
reduction of $\mathrm{Mn}$ from $+7 to +2$
D
oxidation of $\mathrm{Mn}$ from $+2 to +7$

✓

Answer

Correct option: A.

reduction of $\mathrm{Mn}$ from $+4 to +3$

a
In the cathode reaction manganese $(\mathrm{Mn})$ is reduced from the $+4$ oxidation state to the $+3$ state.

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