What products are formed during the electrolysis of a of a concentrated aqueous solution of sodium chloride ?
I. `Cl_(2)(g)," "` II. `NaOH(aq)," "` III. `H_(2)(g)`.

Options

A. `I` only
B. `I` and `II` only
C. `I` and `III` only
D. All of these

Answer

D

Explanation

`NaClrarr Na^(+)+Cl^(-),2Cl^(-)rarr Cl_(2)uarr+2e^(-)`
`HOH rarr H^(+)+OH^(-),2H^(+)+2e^(-)rarr H^(2)uarr,`
`Na^(+) OH^(-) rarr NaOH`