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Write the chemical name and formula of c...

Write the chemical name and formula of common salt. List two main sources of common salt in nature. Write any two uses of common salt. How is it connected to our struggle for freedom?

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Sodium chloride NaCl.
Common salt from sea water and Rock salt.
Uses of common salt:
(i) As a raw material for making a large number of useful chemicals in industry as sodium hydroxide, sodium bicarbonate, sodium carbonate, hydrochloric acid.
(ii) Used in cooking food. It is essential in our food for the paper functioning of nervous system, the movement of muscles and the production of HCl in our stomach for the digestion of food.
(iii) Used as a preservative in pickles.
(iv) Used in the manufacture of soap.
Mahatma gandhi Dandi march was for the procurement of common salt for common man.
It is the most essential product of daily use.
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