Which of the following statements is not true about gases?

Gases have no definite volume and the volume changes depending on its container. Gases are also compressible and the molecules of gases are more distant from each other compared to liquids’ and solids’ molecules. The kinetic energy of gases is not less than of a liquid. It moves in a straight line and is moving continuously and rapidly unless they hit each other or the walls of the container they are in.

The speed varies depending on the size of the gas molecule. Heavier molecules move slower than lighter molecules. The kinetic energy and the temperature has a direct proportion. If there is a decrease in temperature the gas molecules’ gets slower and if there is an increase in temperature, the molecules of the gas move faster.

The statement that is not true about gases from among the given options is that gases have less kinetic energy than the same substance as a liquid. In reality, gases tend to have greater kinetic energy stored in the molecules that which it is constituted of.

This is because gas molecules happen to be in a constant random motion, and the high energy stored in them allows them to break free from the forces among them that which usually exist in the form of a liquid. Hence, Gases have greater kinetic energy than the same substance as a liquid and not the other way round.