Chemistry
Grade-8
Easy
Question
Which allotrope has a free electron between its layers that give rise to electrical conductivity?
- Graphite
- Diamond
- Fullerene
- Charcoal
Hint:
It has multiple layers of graphene.
The correct answer is: Graphite
The correct option is a)Graphite
Of the four valence electrons of a carbon atom of graphite , only three are used for bonding, the fourth is relatively free and can move from one carbon atom to another. These free electrons make graphite an excellent conductor of electricity and an excellent lubricant.
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