question_answer

Consider the Galvanic cell \[\,Z{{n}^{\Theta }}|ZnS{{O}_{4}}||CuS{{O}_{4}}|C{{u}^{\oplus }}\]  the reaction at cathode is           [AMU 2000]

A)                 \[Z{{n}^{2}}^{+}+2{{e}^{-}}\to Zn\]

B)                 \[C{{u}^{2+}}+2{{e}^{-}}\to Cu\]

C)                 \[C{{u}^{2+}}+Zn\to Cu+Z{{n}^{2+}}\]   

D)                 \[Z{{n}^{2+}}+Cu\to Zn+C{{u}^{2+}}\]

Correct Answer: B

Solution :

           \[C{{u}^{2+}}+2{{e}^{-}}\to Cu\]