ElectrochemistryHard

Question

An acidic solution of copper (II) sulphate containing some contaminations of zinc and iron (II) ions was electrolysed till all the copper is deposited. If electrolysis is further continued for sometime, the product liberated at cathode would be :

Options

A.Fe
B.Zn
C.H2
D.Alloy of Zn and Fe.

Solution

After deposition of Cu2+ ions. H+ ion from the H2O molecule will be discharged at cathode as its SRP is higher than of Fe2+ and Zn2+.

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