Differentiate between gas and vapour.

Differentiate between solids, liquids and gases with respect to : (a) fluidity (b) kinetic energy (c) density (d) shape (e) rigidity (f) compressibility.

How evaporation differs from boiling?

What are the characteristics of the particles of matter?

Give Reasons Only:

A. Water at room temperature is a liquid.

B. Naphthalene balls disappear with time without leaving any solid.

C. We can get smell of perfume several metres away.