Question

The pressure of real gas is less than the pressure of an ideal gas because of:

• A. Increase in the number of collision
• B. Finite size of the molecules
• C. Increase in the kinetic energy
• D. Intermolecular forces

Answer 1

The correct option is D

Intermolecular forces

In an ideal gas, the collision between the molecules is said to be elastic, that there is no intermolecular force of attraction between the particles whereas in the real, gases are made up of particles which attract each other and collisions between them is non-elastic. So the pressure of the ideal gas is higher as compared to the pressure of real gas since the particles do not have attractive forces.