Metallic sodium is extracted by the electrolysis of brine (eq. NaCl) .After electrolysis the electrolytic solution becomes basic in nature.Write the possible electrode reactions.

Explanation

Brine is a solution chloride (molten state).
The process of electrolysis involves using an electric current to bring about a chemical change and make new chemicals.In the electrolysis of brine ,sodium ions migrate to the cathode ,where electrons enters the melt and are reduced to sodium metal .
`Na^(+)e^(-)toNa(at cathode)`
Chloride ions migrate the other way toward the anode.They give up thier electrons to the anode and are oxidised to chlorine gas.
`Cl^(-)to(1)/(2)Cl_(2)+e^(-)`(at anode)
Overall reaction:` 2NaCl to 2Na(s)+Cl_(2)(g)`
For aqueous solution of NaCl:`H_(2)O+2e^(-) to H_(2)uarr+2OH^(-)` (at cathode)
`Cl^(-) to (1)/(2)Cl_(2)+e^(-)`(at anode)
Overall reaction: `NaCl(aq)+H_(2)O to Na^(+)(aq)+OH^(-)(aq)+H_(2)(g)+(1)/(2)Cl_(2)(g)`
After electrolysis the electrolytic becomes basic in nature.[Due to formation of hydroxide `(OH^(-))` ion].