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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