Question

(a) State two characteristic properties of each of the following :
(i) Solid
(ii) Liquid
(iii) Gas
(b) Archit dropped a crystal of potassium permanganate into two beakers, A and B, containing hot water and cold water respectively. After keeping the beakers undisturbed for some time what did he observe and why ?

CBSE Class IX Science LA (5 Marks)

Answer 1

Solid
1. They can't be compressed.
2. They have zero fluidity.

Liquid
1. They good fluidity.
2. They can be compressed upto a part.

Gas
1. They have best fluidity.
2. They can be highly compressed.

Answer 2

(a) (i) Properties of solid : They have a fixed shape and volume. They are rigid.
(ii) Properties of liquid : They have fixed volume, but not fixed shape. They are not rigid. (iii) Properties of gas : They neither have fixed shape nor fixed volume. They are highly          compressible.
(b) Potassium permanganate crystals diffuse faster in hot water.
     Because, as the temperature increases diffusion increases.