ElectrochemistryHard
Question
A solution containing 1.0 M each of Cu(NO3)2, Mg(NO3)2, AgNO3, Hg(NO3)2 is being electrolysed using inert electrodes. The values of standard electrode potential are: Ag+|Ag = 0.80 V, Hg2+|Hg = 0.79 V, Cu2+|Cu = 0.34 V, Mg2+|Mg = − 2.37 V. With increasing voltage, the sequence of deposit of metals on the cathode will be
Options
A.Ag, Hg, Cu, Mg
B.Mg, Cu, Hg, Ag
C.Ag, Mg, Cu
D.Cu, Hg, Ag
Solution
Reduction occur first for the species having higher reduction potential.
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