In a nickel-cadmium battery, which of the following reactions occurs at the anode during discharge?

A \( \mathrm{Cd}(\mathrm{s})+2 \mathrm{OH}^{-}(\mathrm{aq}) \rightarrow \mathrm{Cd}(\mathrm{OH})_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \)

B \( \mathrm{Ni}(\mathrm{OH})_{2}(\mathrm{~s})+\mathrm{H}_{2} \mathrm{O}(\mathrm{l})+\mathrm{e}^{-} \rightarrow \mathrm{NiOOH}(\mathrm{s})+ \) \( \mathrm{OH}^{-}(\mathrm{aq}) \)

C \( \mathrm{Ni}(\mathrm{OH})_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow \mathrm{Ni}(\mathrm{s})+2 \mathrm{OH}^{-}(\mathrm{aq}) \)

D \( \mathrm{Cd}(\mathrm{OH})_{2}(\mathrm{~s})+2 \mathrm{e}^{-} \rightarrow \mathrm{Cd}(\mathrm{s})+2 \mathrm{OH}^{-}(\mathrm{aq}) \)

Solution

Correct Answer: Option A

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