During the electrolysis of aqueous NaCl solution, the ions present are:
Na⁺, H⁺ and Cl⁻.
Na⁺ and Cl⁻.
Na⁺, OH⁻ and Cl⁻.
Na⁺, H⁺, OH⁻ and Cl⁻.
During the electrolysis of aqueous CuSO4 using active electrodes (copper), the ions/atoms preferentially discharged at the electrodes are:
H⁺ at the cathode.
Cu(s) at the anode.
Cu²⁺ at the cathode and Cu(s) at the anode.
Cu²⁺ at the cathode.
