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

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