Question

According to kinetic theory of gases, there are:
A.Intermolecular attractions
B.Molecules have considerable volumes
C.No intermolecular attractions
D.Velocity of molecules decreases for each collision

Answer 1

To answer this question, you must recall the kinetic molecular theory of gases. In a gas, the intermolecular distances are very large as compared to those in solids and liquids. The molecules are very loosely bound to each other.

Complete answer:
The postulates of the kinetic molecular theory of gas are:
A gas is composed of a large number of very tiny spherical particles (atoms or molecules, and the particles are present far from each other. All the particles are identical to each other
The volume of the particles is negligible as compared to the total volume occupied by the gas
The particles of the gas are moving constantly. This constant motion also leads to collisions amongst the particles and also of the particle with the walls of the container. All these collisions are assumed to be completely elastic. The pressure exerted by the gas is due to these collisions with the walls of the container.
There are no forces of attraction or interaction between the particles of a gas.
The average kinetic energy of the particles of the gas are constant for a constant temperature. In other words, the kinetic energy is directly proportional to the temperature of the gas.
From all the above given postulates, we can conclude that the correct answer is C.

Note:
The Kinetic theory of gases has various applications. The kinetic theory of gases helps us in the theoretical derivation of the gas laws. The Ideal gas equation is also obtained on the basis of the assumptions made by the kinetic theory of gases.