Question

(a) Arrange the following in the increasing order of :
(i) force of attraction
(ii) intermolecular space
Iron nail, kerosene and oxygen gas.
(b) Define the following terms :
(i) Rigidity (ii) Compressibility (iii) Diffusion

CBSE Class IX Science LA (5 Marks)

Answer 1

(a) (i) Force of attraction : Oxygen gas < Kerosene < Iron nail

(ii) Intermolecular space : Iron nail < Kerosene < 02 gas

(b) (i) Rigidity : It is property of matter to maintain shape against external force.

(ii) Compressibility : It is the property of matter by virtue of which molecules of matter are brought closer to each other.

(iii)Diffusion : The inter mixing of the particles of matter is known as diffusion.

Answer 2

Answer:

arrange descending order of compressibility

Sponge, natural gas, cotton, kerosene, plastic