A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that

A basic postulate of the kinetic theory of gases is that the molecules of a gas move in straight lines between collisions. This implies that

A. collisions are perfectly elastic

B. forces of repulsion exist 

C. forces of repulsion and attraction are in equilibrium

D. collisions are inelastic

The correct answer is A.

Explanation: 

The statement that gas molecules move in straight lines between collisions means that there are no significant intermolecular forces acting on them except during collisions.

This leads to the idea that when they collide, no kinetic energy is lost.

Therefore, it implies that:

✅ A. collisions are perfectly elastic

Explanation (brief):
In kinetic theory, gas molecules move freely in straight lines because intermolecular forces are negligible, and their collisions conserve kinetic energy (elastic collisions).

QUESTION EIGHT