Question

when a gas is cooled, the number of collisions decrease

Answer 1

Hey friend ☺☺

Yes, When a gas is cooled the number of collisions decreased.

Hope it helps you...
$hweta☺✌

Answer 2

Explanation:

When we decrease the temperature, there will be decrease in the kinetic energy of molecules because on decreasing temperature we are decreasing the energy of molecules.

Therefore, collision between the molecules will also decrease if they have less energy. As a result, after some time the molecules of gas will start to settle down at the bottom as they have released their energy.

Hence, gas is cooled.