20 According to the kinetic molecular theory for an ideal gas, all gas particles(1) are in random, constant, straight-line motion
(2) are separated by very small distances relative to their sizes
(3) have strong intermolecular forces
(4) have collisions that decrease the total energy of the system



Answer :

According to the kinetic molecular theory for an ideal gas, all gas particles "have collisions that decrease the total energy of the system" but this is not always the case.