Which of the following is true of gases?

A. Gases are easily compressed because of the low density.

B. Gases do not mix well because of the low intermolecular forces.

C. Particles flow easily in gases because of the high intermolecular forces.

D. Particles of gases spread out to fill containers, leading to high density.

Answer: A. Gases are easily compressed because of the low density.

Explanation:

Solid state : In this state, the molecules are arranged in regular and repeating pattern. The molecules are closely packed that means high inter molecular forces are present and they have high density. They are incompressible.

For example : Copper

Liquid state : In this state, the molecules are present in random and irregular pattern. The molecules are closely packed but they can move from one place to another and thus have low density.

For example : water

Gaseous state : In this state, the molecules are present in irregular pattern. The molecules have low inter molecular forces of attraction and they can move freely from one place to another and spread out and are least dense. They are easily compressible due to large spaces between molecules.

For example : Helium gas

Gases have low density and spread out to fill containers but the latter does not lead to high density.

The only statement that is true is A, easily compressed.