Question

All of the following statements, except one, are important postulates of the kinetic-molecular theory of gases. Which one is not?
A. The average kinetic energy of the molecules is inversely proportional to the absolute temperature

B. The time during which a collision between two molecules occurs is negligibly short compared to the time between collisions

C. Gases consist of large numbers of particles in rapid random motion

D. The volume of the molecules of a gas is very small compared to the total volume in which the gas is contained

E. There are no attractive or repulsive forces between the individual molecules

Answer 1

Answer:

B. The time during which a collision between two molecules occurs is negligibly short compared to the time between collisions

Explanation:

Kinetic molecular theory postulates:-

• The gas is composed of small molecules are they are in continuous random motion and having elastic collisions with one another and also with the walls of the container.
• The molecules of the gas does not exert any kind of repulsive or attractive forces on each other and they their size is negligible as compared to the difference between them.
• Pressure exerted by the molecules of the gas results from the collisions which is happening between the molecules of the gas and the walls of the container.
• Average kinetic energy of molecules of the gas is directly proportional to absolute temperature.

Hence, The correct option is:- B. The time during which a collision between two molecules occurs is negligibly short compared to the time between collisions. This is not an important postulate of the kinetic molecular theory.