1.

1 M solution each of Cu(NO_(3))_(2) , AgNO_(3), Hg_(2)(NO_(3))_(2)andMg(NO_(3))_(2)is electrolysed using Pt- electrodes. The values of standard electrode potentials in volts are : Ag^(+)//Ag=+0.80V,Cu^(2+)//Cu=+0.34VHg_(2)^(2+)//Hg=+0.79V,Mg^(2+)//Mg=-2.37V The sequence of deposition of metals on the cathode will be

Answer»

`MG,AG,Cu`
`Mg,Cu,Ag`
`Ag,Hg,Cu`
`Cu, Hg,Ag`

Solution :METALS get deposuted after undergoing reductionon cathode . Higher the value of REDUCTION potential , more is the tendency to get reduced . ORDER of `E^(@)` values :
`AggtHggtCu`.
Hence , sequence of deposition : Ag : Hg. Cu.


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