The ion which is discharged at the anode during the electrolysis of copper sulphate solution using copper electrodes as anode and cathode.

${\mathrm{M}}_2\mathrm{O}$ is the oxide of a metal $\text{'}\mathrm{M}\text{'}$ which is above hydrogen in the activity series. ${\mathrm{M}}_2\mathrm{O}$ when dissolved in water forms the corresponding hydroxide which is a good conductor of electricity. 

(i) State the reaction taking place at the cathode

(ii) Name the product at the anode.