A solution containing 1 mol per liter of each Cu(NO3)2,AgNO3,andHg2(NO3)2 is being electrolyzed by using inert electrodes. The value of standard electrode potentials in volts (reduction potential) are
Ag|Ag⨁=+0.80,2Hg|Hg2+2=+0.79
Cu|Cu2+=+0.34,Mg|Mg2+=−2.37
With increasing voltage, the sequence of deposition of metals at the cathode will be: