Which of the following reaction occur during the electrolysis of `CuSO_4` solution using copper electrodes?

Options

A. `Cu to Cu^(+2) + 2e^(-)`
B. `2SO_4^(2-) + 2H_2O to 2H_2SO_4 + O_2`
C. `Cu^(+2) + 2e^(-) to Cu`
D. `2H^(+) + 2e^(-) to He `

Answer

A, C

Explanation

at anode : oxidation takes place i.e. [ loss of electrons ]
at cathode : reduction takes place i.e. [ gain of electrons]
`Cu to Cu^(+2) + 2e^(-)`