Read the following statements carefully and select the correct option
Assertion (A): Gases diffuse very fast into other gases
Reasoning (R): Gases have large intermolecular spaces

Correct option is A

The correct answer is Both (A) and (R) are true and (R) is the correct explanation of (A).
The intermolecular forces of attraction are strong in solids because the constituent particles are closely packed. So, the shape and size of the solids do not easily change.
In liquid, the intermolecular forces of attraction in between the molecules are weaker than in solid because the constituent particles are less closely packed. So, the shape and size of the liquids are easily changed. The intermolecular spaces between solids are absent because they are closely packed to each other. Solid can be compressed because the particles cannot move.