Q.

Aqueous solution of ‘X’ is electrolyzed using inert electrodes. Hydrogen is liberated at cathode and oxygen is liberated at anode. ‘X’ is

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a

aq. NaCl

b

aq. CuCl2

c

aq. AgNO2

d

aq. K2SO4

answer is D.

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Detailed Solution

At cathode, discharge potential of H2O is greater than that of K+∴ 2H2O+2e-→H2+2OH-At anode, discharge potential of H2O is greater than that of SO4−2∴ 2H2O → 4H++4e-+O2
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