What will occur if the velocity of the gas molecules colliding with the sides of the container increases?

The kinetic energy will increase and the pressure of the gas will also increase.

Explanation:

An increase in temperature will normally cause an increase in volume. Because the gas is enclosed in a rigid container the volume of the container can not increase.

An increase in temperature is by definition is an increase in kinetic energy. The increase in kinetic energy will cause the molecules of the gas to move more rapidly. As the molecules move more rapidly they collide with each other more violently. These collisions will cause an increase in pressure.

The pressure of the gas will increases