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 newton’s laws of motion. increasing pressure is reducing the volume of the gas. increasing collisions of gas molecules will increase energy between them.

Increasing collisions of gas molecules will increase energy between them.

Explanation:

The first three statements, 1)  Gas particles are acting like tiny, solid spheres, 2) gas particles are obeying Newton’s laws of motion, and 3) increasing pressure is reducing the volume of the gas, are basic postulates of the kinetic-molecular theory, so they, of course, do  not show the limitations of the theory in describing a gas.

On the other hand, the fourth statement is an observation that violates the postulate of the kinetic-molecular theory that asserts that the collisions are elastic, with no change of energy.

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the answer to this question is 3.