An aqueous solution containing one mole per litre of each Cu(NO ) , AgNO , Hg (NO ) and Mg(NO ) is b — NEET Chemistry Past Papers Chemistry Question

Question

An aqueous solution containing one mole per litre of each Cu(NO ) , AgNO , Hg (NO ) and Mg(NO ) is being electrolysed using inert electrodes. The values of the standard electrode potentials in volts (reduction potentials) are Ag | Ag = 0.80, 2Hg | = + 0.79 Cu | Cu = + 0.34, Mg | Mg = – 2.37 With increasing voltage, the sequence of deposition of metals on cathode will be (A) Ag, Hg, Cu, Mg (B) Mg, Cu, Hg, Ag (C) Ag, Hg, Cu (D) Cu, Hg, Ag 3 2 3 2 3 2 3 2 + Hg2+ 2 2+ 2+