Which of the following is not a postulate of Kinetic molecular theory of gases?

مندرجہ ذیل میں سے کون سا گیسوں کے کائنےٹک مالیکیولر تھیوری کا مرجع نہیں ہے؟

In gases there is a predominance of intermolecular energy

Collisions of gas molecules are elastic

All molecules have same speed at different temperatures

Do not exert the same pressure in all directions

The postulate that "Collisions of gas molecules are elastic" is not a part of the Kinetic Molecular Theory of Gases.