A solution containing 1 mole per litre each of Cu (NO3)2, AgNO3, Hg2 (NO3)2 and Mg (NO3)2 is being electrolysed by using inert electrodes. The values of the standard oxidation potentials in volts are Ag | Ag+ = ' 0.80 V, Hg | Hg2+ = ' 0.79 V, Cu | Cu2+ = ' 0.34 V, and Mg | Mg2+ = 2.37 V. The order in which metals will be formed at the cathode will be [Hint: Smaller the oxidation potential (higher the reduction potential) of a species, more readily will it be deposited at cathode.]