WBJEE 2019 Chemistry Solved Paper

(D)
On electrolysis of aqueous solution of CuSO4 on using Cu-electrode. According to SOP values at anode.
2H2O→O2 + 4H+ + 4e− ; E0 = – 1.23 V
Cu → Cu2+ + 2e− ; E0 = – 0.34 V
So reaction carried out on anode, which have high SOP value.