Solution:
concept - Washing soda is the hydrated form of sodium carbonate, ( ) and it is the washing powder that is used at home.The chemical formula of washing soda is
Uses of washing soda are-
● It is used as a cleaning agent in industry and households.
● It is used in the paper, textile, soap and laundry industries.
● It is used in the water softening process.
● It is used in the production of glass.
● It is one of the most important products in laundries.
Hence, the correct answer is 2.