Which of the following is NOT a postulate of the kinetic molecular theory of gases?

Explanation

The postulates of kinetic molecular theory for gases are as follows:
i) Every gas consists of large number of very small particles called atoms or molecules.
ii) The volume occupied by the gas molecules is negligible as compared to the total volume of the gas.
iii) There is no force of attraction between particles of a gas at ordinary temperature and pressure.
iv) The particles of a gas move in all possible directions in straight lines. During their random motion, they collide with each other. The particles of a gas also collide with the walls of the container.
v) The particles of a gas are always in constant and random motion.
vi) At any particular time, different particles in the gas lave different speeds and hence different kinetic energies.
vii) The average kinetic energy of the gas molecules is directly proportional to the absolute temperature.