State the main postulates of kinetic theory of matter.

The main postulates of the theory are:
1. Matter is composed of very small particles called atoms and molecules.
2. The constituent particles of a kind of matter are identical in all respects.
3. These particles have space or gaps between them which is known as interparticular or
intermolecular space.
4. There exists a force of attraction between the particles of matter which holds them together. This
force of attraction is known as interparticular or intermolecular force of attraction.
5. Particles of matter are always in a state of random motion and possess kinetic energy, which
increases with increase in temperature and vice-versa