Starting with sodium chloride how would you proceed to prepare
(1) Sodium metal.

Explanation

Fu and NaCl on electrolysis given sodium metal.
`2NaCl to 2Na^(+) +2Cl^-`
`2Na^(+) +2e^(-) to 2Na` (cathode)
`2Cl^(-) to Cl_2 +2e^(-)` (anode)
ii) Castner- Kellner process is a commercia method used for the preparation of sodium hydroxide.
In this process sodium hydroxide is prepared by the electrolysis of sodium chloride in Castner- Kellner cell.
BRine solution is electrolysed using a mercury cathode and a carbon anode.
Sodium metal is formed at cathode and it combine with mercury to form sodium amalgam. Chlorine gas is evolved at anode.
The amalgam is streated with water to form sodium hydroxide.
Cell reactions:
`2NaCl to 2Na^(+) +2Cl^(-)`
`2Na^(+) +2e^(-) overset(Hg) to 2Na`- amalgam
`2Cl^(-) to Cl_2+2e^-`
`2Na- amalgam +2H_2O to 2NaOh +2Hg +H_2`
This process is also called as mercury cathode process.
(iii) The obtained Na-metal reacts with excess of oxygen to form sodium peroxide.
`2Na+O_2 to Na_2O_2`
Sodium peroxide
iv) preparation:
Sodium carbonate is prepared by solvay process.
In this process sodium chloride reacts with ammonium bicarbonate and gets precipitated the low soluble sodium bicarbonate.
The lather is prepared by passing `CO_2` into a concentrated solution of NaCl saturated with ammonia. Here `(NH_4)_2CO_3` followed by `NH_4 HCO_3` are formed.