MetallurgyHard

Question

Of the following the metals that cannot be obtained by electrolysis of the aqueous solution of their salts are :

Options

A.Ag
B.Mg
C.Cu
D.Al

Solution

For these two metals EoO.P. is higher than EoO.P.H/H+ So if their aqueous salt solutions are electrolysed than H2 will be liberated at cathode instead of metal.

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