Explanation:
As kinetic energy is the energy obtained by an object due to its motion. And, relation between kinetic energy and temperature is as follows.
K.E = 
Hence, more is the increase in temperature more will be the kinetic energy of molecules of a substance.
Therefore, with increase in kinetic energy there will occur more number of collisions as molecules collide with a force on the walls of a container which will lead to an increase in pressure also.
And, on losing kinetic energy the molecules of the substance will come closer to each other. Therefore, a decrease in temperature of the substance will also occur.
Therefore, we can conclude that the true statements are as follows.
- If the container is cooled, the gas particles will lose kinetic energy and temperature will decrease.
- If the gas particles move more quickly, they will collide more frequently with the walls of the container and pressure will increase.
- If the gas particles move more quickly, they will collide with the walls of the container more often and with more force, and pressure will increase.