Question

Why do solids have a definite shape and distinct boundaries at normal room temperature without applying force ?

Answer 1

Definite shape and distinct boundaries of solids:

1. In solid form, molecules are so tightly packed that there is very less intermolecular space and there is a high Intermolecular force of attraction.
2. Thus, molecules of solids do not move about their mean position and thus solids have a definite shape and volume along with distinct boundaries at room temperature without applying force.