The number of molecules of water of crystallisation present in washing soda crystals is :

(a) five

(b) two

(c) ten

(d) seven

Q. The number of molecules of water of crystallisation present in washing soda crystals is:

Q. State the number of water molecules present in crystals of washing soda and plaster of Paris. What are these molecules called?

Q. Write the name and formula of one salt each which contains:
(a) two molecules of water of crystallisation
(b) five molecules of water of crystallisation
(c) ten molecules of water of crystallisation

Q. Slide the number of water molecules present in washing soda.