1.

What is the energy gap between valence band and conduction band in crystal of insulators ?

Answer»

Both the bands are overlapped with each other
Very small
infinite
very large

Solution :When insulators (non metal atoms) interact to FORM a SOLID, their ATOMIC orbitals mix to form TWO bunch of orbials, t separated by a large band gap. Electrons cannot therefore be promoted to an empty level, where they could move FREELY.


Discussion

No Comment Found

Related InterviewSolutions