Electrolysis of aqueous copper sulphate solution using inert electrodes will

There occurs oxidation of water at anode:$2{\mathrm{H}}_2\mathrm{O}\to 4{\mathrm{H}}^{+}+{\mathrm{O}}_2+4{\mathrm{e}}^{-}$.

Electrolysis of aqueous copper sulphate solution using inert electrodes will evolve ${\mathrm{O}}_2$ at anode.