State the main postulates of kinetic theory of matter.

What happens to water if:

(a) it is kept in a deep freezer?

(b) it is heated?

Explain the change of state of water for the above two conditions with the help of kinetic theory.

What change occurs in the mass of a solid when it is heated to convert into a liquid?

What do you observe when barium chloride solution is mixed with sodium sulphate solution ?
What difference is observed in the mass of reactants and products in the above reaction ?