A) \[2O{{H}^{-}}\xrightarrow{{}}{{H}_{2}}O+1/2{{O}_{2}}+2{{e}^{-}}\]
B) \[Ag\xrightarrow{{}}A{{g}^{+}}+{{e}^{-}}\]
C) \[F{{e}^{2+}}\xrightarrow{{}}F{{e}^{3+}}+{{e}^{-}}\]
D) \[C{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu\]
Correct Answer: D
Solution :
At anode, oxidation takes place while at cathode reduction (ie, gain of electron) takes place. Thus,\[C{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu\]occurs at cathode.
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