Question

Why is convection not significant in solids?

• A. Due to crystalline structure of solids, their density does not change
• B. Impurities in solids gain the energy from convection.
• C. Molecules of solids vibrate while moving from one part to other
• D. Molecules of solids are tightly bound and not free to move.

Answer 1

The correct option is D Molecules of solids are tightly bound and not free to move.

In convection, molecules of the fluid differs in density causing the motion of molecules and hence the transfer of heat. Since, the molecules of solids are tightly bound, they are not free to move across the substance and hence negligible convection occurs.