Question

when a gas is cooled the number of collisions decrease give reason

Answer 1

It happens because on cooling i.e on decreasing the temperature the kinetic energy of the gas molecules also decreases therefore the collision decreases....CHEERS

Answer 2

Answer:

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.