Answer :

(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.


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