Explain the meaning of the the term 'matter'.

Matter in any state is composed of small particles - molecules, atoms or ions.
Differentiate the terms above in italics.

State which of the three states of matter i.e. solids, liquids or gases - have

(a) No definite volume

(b) A definite shape

(c) High density

(d) No free surfaces

(e) Particles which diffuse very easily.

State the main postulates of the kinetic theory with special reference to -

(a) Inter-particle space

(b) Inter-particle attraction

(c) Energy possessed by particles of matter.