1.

Which of the following reactions will take place at the cathode during the electrolysis of an aqueous solution of sodium chloride ?

Answer»

`Na^(+) +E^(-) to Na`
`Cl^(-) -e^(-) to Cl`
`2H^(+) +2e^(-) to H_(2)`
`2H^(-) - 2e^(-) to H_(2)`

Solution :Aqueous solution of NaCl contains `H^(+)` and `Na^(+)` CATIONS. `H^(+)` cations will preferentially migrate as compared to `Na^(+)` DUE to high reduction POTENTIAL.


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