Question

Give reason why a solid does not flow, but a liquid flows?

Answer 1

This question gives the knowledge about the properties of solids and liquids. Solid substances are the substances that possess strong intermolecular forces of attraction whereas liquid substances are the substances that possess weak intermolecular forces of attraction as compared to solid substances.

Complete answer:
Solid substances are the substances that possess strong intermolecular forces of attraction whereas liquid substances are the substances that possess weak intermolecular forces of attraction as compared to solid substances.
Properties of solids are as follows:
$1$. Solid substances are rigid in nature.
$2$. The melting points of solids are always definite.
$3$. Solid substances possess definite volume.
$4$. Solid substances are the substances that possess strong intermolecular forces of attraction.
$5$. These are highly incompressible and possess high density.
$6$. They possess a very low rate of diffusion.
Properties of liquids are as follows:
$1$. Liquid substances are not rigid in nature.
$2$. The melting point of liquids is not definite.
$3$. Liquid substances possess definite volume.
$4$. Liquid substances are the substances that possess weak intermolecular forces of attraction as compared to solid substances.
$5$. These are highly compressible and possess high density.
$6$. They possess a very high rate of diffusion.
Due to strong intermolecular forces of attraction, the molecules present in them cannot move freely. They can simply vibrate at their mean positions. Whereas in case of liquids, they possess weak intermolecular forces of attraction. The molecules present in them can move freely. Thus, this makes liquids to flow readily.

Note:
Always remember the concept that the solid substances are the substances that possess strong intermolecular forces of attraction whereas liquid substances are the substances that possess weak intermolecular forces of attraction as compared to solid substances.