Starting with sodium chloride how would you proceed to prepare
(2) Sodium hydroxide.

Explanation

Sodium hydroxide : Electrolysis of aqueous sodium chloride either in Nelson's cell or in Castner Kellner cell gives sodium hydroxide.
`NaCl to Na^(+) + Cl^(+)`
`H_(2)O to H^(+) + OH^(-)`
`{:(2Cl^(-) + Cl_(2), 2e^(-)),(2H^(+)+2e^(-), to H_(2)):}} "at anode "`
`Na^(+) + OH^(-) `to NaOH at cathode.