State five important assumptions of the kinetic theory of matter.

Explanation

(i) Gases are made up of negligibly small sized particles called molecules, moving in all possible directions and speeds.
(ii) The gas molecules due to negligible force of attraction, are free to move in whole space available and are restricted only by the wall of container, hence they attain the shape of the containing vessel
(iii) The molecules of gas collide with each other and also with the walls of the container. Due to this collision, gas molecules exert pressure which is same in all directions.
(iv) There is large inter-molecular spaces between gas molecules and thus results in the high compressibility of gases.
(v) Gases on decrease in pressure and increase in temperature show increase in volume, thus gases are highly expansible.
(vi) Gases due to large inter-molecular spaces, number of molecules per unit volume is very small compared to solids and liquids. Thus, gases have low density and forming a homogeneous mixture.
(vii) On cooling the inter-molecular spaces, between gas molecules reduces and the gas molecules come closer resulting in liquification of gases.