Question

The closeness of particles of gas and their low speeds allow intermolecular forces to become important at certain pressures and temperatures. Which best describes this statement?
This is a limitation of the kinetic-molecular theory.
This is a postulate of the kinetic-molecular theory.
This describes ideal gas behavior using the kinetic-molecular theory.
This describes ideal gas behavior without the kinetic-molecular theory.

Answer 1

This is a limitation of the kinetic-molecular theory.

Reason: one KMT postulate is that gas particles have no intermolecular forces; at high pressure or low temperature particles are close and slow so attractions become important and the ideal-gas/KMT assumptions break down.