Question

A solid melts slightly above $273$ K and is a poor conductor of heat and electricity. To which of the following categories does it belong?

• A. Ionic
• B. Covalent
• C. Metallic
• D. Molecular

Answer 1

The correct option is D Molecular

Metals are good conductors of heat and electricity with variable melting points.
Ionic solids are also good conductors of heat and electricity with very high melting points.
Covalent solids are non conductor of electricity and heat with very high melting points due to their strong bonding.
Molecular solids are poor conductors of heat and electricity and they have lower melting point than ionic solids.