Q.

Which one of the following aqueous solution when subjected to electrolysis using inert electrodes shows change in concentration without any change in composition.

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aq.CuCl2

aq . K2SO4

aq . AgNO3

aq. NaCl

answer is B.

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Detailed Solution

aq. K2SO4Discharge potential of H2O is lesser than K+2H2O +2e−→ H2+2OH−H2 is liberated at cathode.Discharge potential of H2O is lesser than SO4-22H2O →O2+4H++4e-O2 is liberated at anodeLeft over is concentrated. K2SO4 Conc.↑ composition doesn’t change.

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