Question

Which of the following type of solid act as insulator in solid state but conductor in liquid state?

• A. Non-polar molecular solid
• B. Metallic solid
• C. Polar molecular solids
• D. Ionic solid

Answer 1

The correct option is D Ionic solid

Molecular soilds (non-polar molecular solids, polar molecular solids, hydrogen bonded solids) are insulators.
Metallic solids are good conductors in solid state and liquid state.
Ionic solid solids are act as insulators in solid state and in liquid or molten state or in aqueous solution it act as conductors