Energy gaps between the highest band and the lowest empty bands i… - Vidyadip

MCQ

Energy gaps between the highest band and the lowest empty bands in elements $A, B, C$ and $D$ are $0,70,530$ and $90 \ kJ\ mol−1.$ Then,

A
Element $A$ is metal
B
Element $C$ is insulator
C
Element $B$ and $D$ can be semiconductors
✓
All are correct conclusion about elements $A, B, C$ and $D$

✓

Answer

Correct option: D.

All are correct conclusion about elements $A, B, C$ and $D$

Energy gaps between the highest band and the lowest empty bands is lowest in metals, moderate in semi conductors and very high in insulators. This suggests us that:
Element $A$ must be a metal, element $C$ must be an insulator and element $B$ and $D$ can be semiconductors.

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