Describe two important uses of each of the following: (i) caustic soda (ii) sodium carbonate (iii) quicklime.

(i) Two important uses of caustic soda (sodium hydroxide) are given below:

⇒ It is used in the manufacture of soap, paper, artificial silk, etc. and in petroleum refining and purification of bauxite.

⇒ It is used in the textile industries for mercerising cotton fabrics.

(ii) Two important uses of sodium carbonate are given below:

⇒ It is used in water softening, laundering and cleaning.

⇒ It is used in the manufacture of glass, soap, borax, etc. and in paper, paints and textile industries.

(ii) Two important uses of quick lime are given below:

⇒ It is used in the manufacture of sodium carbonate from caustic soda (sodium hydroxide).

⇒ It is employed in the purification of sugar and in the manufacture of dyestuffs.