A) \[SO_{4}^{2-}\xrightarrow{{}}S{{O}_{4}}+2{{e}^{-}}\]
B) \[Cu\xrightarrow{{}}C{{u}^{+}}+{{e}^{-}}\]
C) \[2O{{H}^{-}}\xrightarrow{{}}{{H}_{2}}O+\frac{1}{2}{{O}_{2}}+2{{e}^{-}}\]
D) \[Cu\xrightarrow{{}}C{{u}^{2+}}+2{{e}^{-}}\]
Correct Answer: C
Solution :
When aqueous solution of \[\text{CuS}{{\text{O}}_{\text{4}}}\]is subjected to electrolysis, the following reactions take place at cathode and anode. \[CuS{{O}_{4}}\xrightarrow{{}}C{{u}^{2+}}+SO_{4}^{2-}\] At cathode: \[C{{u}^{2+}}+2{{e}^{-}}\xrightarrow{{}}Cu\] At anode: \[2O{{H}^{-}}\xrightarrow{{}}{{H}_{2}}O+\frac{1}{2}{{O}_{2}}+2{{e}^{-}}\]
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