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Which process occurs in the electrolysis of an aqueous solution of nickel chloride at nickel anode?
(A) \( \mathrm{Ni} \rightarrow \mathrm{Ni}^{2+}+2 \mathrm{e}^{-} \)
(B) \( \mathrm{Ni}^{2+}+2 \mathrm{e}^{-} \rightarrow \mathrm{Ni} \)
(C) \( 2 \mathrm{Cl}^{-} \rightarrow \mathrm{Cl}_{2}+2 \mathrm{e}^{-} \)
(D) \( 2 \mathrm{H}^{+}+2 \mathrm{e}^{-} \rightarrow \mathrm{H}_{2} \)
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