When an aqueous solution of sodium chloride is electrolysed using platimun electrodes, the ion discharged at the electrodes are

Options

A. sodium and hydrogen
B. sodium and chloride
C. hydrogen and chloride
D. hydroxyl and chloride

Answer

C

Explanation

`Nacl hArr Na^(+)+Cl^(-)`
`H_(2)O hArr underset(darr^(e^(-)))(H^(+))+OH^(-)`
`underset(("At cathode"))((1)/(2)H_(2)) larr H, Cl^(-) rarr Cl rarr underset(("At anode"))((1)/(2))Cl_(2)+e^(-)`
Reduction potential of H is more than Na.