Question

which observation indicates that the kinetic - molecular theory has limited use for describing a certain gas?
gas particles are acting like tiny, solid spheres.
gas particles are obeying newtons laws of motion.
increasing pressure is reducing the volume of the gas.
increasing collisions of gas molecules will increase energy between them.

Explanation:

The kinetic - molecular theory assumes gas particles have no intermolecular forces and elastic collisions with no energy gain between them. If increasing collisions increase energy between gas molecules, it means there are non - ideal behaviors not accounted for by the theory. The other options are consistent with the theory. Gas particles acting like tiny solid spheres, obeying Newton's laws, and pressure reducing volume are in line with the theory's assumptions.

Answer:

Increasing collisions of gas molecules will increase energy between them.