Question

Which statement is part of the kinetic molecular theory? A. Gas particles are in constant motion. B. Gas particles attract each other. C. Gas particles lose their energy during collisions. D. Gas particles stick to the walls of their container.

Answer 1

Answer: The correct answer is Option A.

Explanation: Kinetic molecular theory is used to study the behavior of gases. Some of the postulates of this theory are:

1. The molecules of the ideal gas exerts no attractive force on other particles as well as on the walls of the container.
2. The particles are in constant random motion.
3. The molecules of a gas are separated by the average distances which are much greater than the sizes of the molecules themselves.
4. Collision between the particles are perfectly elastic as when they collide, they change their directions and kinetic energies. The collisions are not sticky in nature.
5. The average kinetic energy of the particles of a gas is directly proportional to the temperature.

From the above postulates, it is clear that statement A is correct for kinetic molecular theory.

Answer 2

“A. Gas particles are in constant motion” is a part of the Kinetic Molecular Theory

In the Kinetic Molecular Theory, gas particles do not

• attract each other

• lose energy during collisions

• stick to the walls of their container.