Question

At a given temperature the force between molecules of a gas as a function of intermolecular distance is :

• A. always constant
• B. always decreases
• C. always increases
• D. first decreases and then increases

Answer 1

The correct option is D first decreases and then increases

From Lennard-Jones potential, when atoms are very close to each other, there exists repulsive force in between them and as the distance between is greater than some critical distance, the force of attraction increases.

Hence, Option D is correct.