A solution containing one mole per liter of each `Cu (NO_3)_2`, `AgNO_3`, `Hg_2 (NO_3)_2` and `Mg(NO_3)_2` is being elec

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Q 2636091872.     A solution containing one mole per liter of each `Cu (NO_3)_2`, `AgNO_3`, `Hg_2 (NO_3)_2` and `Mg(NO_3)_2` is being electrolysed by using inert electrodes. The values of standard electrode potentials in volts (reduction potential) are

`Ag^+//Ag = +0.80, Hg_2^(2+)//2Hg = + 0.79`

`Cu^2 //Cu = + 0.34, Mg^(2+) //Mg = - 2.37`

With increasing voltage, the sequence of deposition of metals on the cathode will be
JEE 1984
A

`Ag, Hg, Cu, Mg`

B

`Mg, Cu, Hg, Ag`

C

`Ag, Hg, Cu`

D

`Cu, Hg, Ag`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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