Write name, method of preparation and uses of following :

NaOH,

(i) NaOH

Name: Sodium hydroxide

Methods of preparation: When a concentrated solution of sodium chloride is electrolyzed, it forms sodium hydroxide (NaOH), chlorine gas and hydrogen gas.

Chlorine gas is formed at the anode (positive charge) and hydrogen gas at the cathode (negative charge)

The reaction takes place is given as:

2NaCl + 2H₂O → 2NaOH + Cl₂ + H₂

The above reaction is called chlor-alkali process.

Uses:

a. It is used in the synthesis of soap, paper, and other chemicals.

b. It is used in the preparation of oils.

c. It is used in the refining of petroleum