JEE Main levelSingle correct optionDifficulty 2 of 3ig179
Which statement about the collision of ideal gas molecules with the container walls is correct?
AMolecules lose kinetic energy at every collision with the wall
BThe collisions are elastic and the total kinetic energy is conserved
CMolecules stick to the wall briefly and then leave
DCollisions with the wall convert kinetic energy into heat
Answer: B
Kinetic theory assumes perfectly elastic collisions: momentum is transferred to the wall (giving pressure) but no kinetic energy is lost on average, so the gas does not cool spontaneously.