Question

Fill in the following blanks
(a) Common salt is obtained from sea-water by the process of.............
(b) Rock salt is mined just like ......................
(c) Chemical formula of washing soda is ..................
(d) Sodium hydrogen carbonate is .................. soda whereas sodium carbonate is ................. soda.
(e) The chemical formula of plaster of Paris is ............

Answer 1

Answer:

(a) evaporation (c) Na2Co3

Explanation:

(d) baking soda and washing soda

(e) Caso4× 1/2 H2o