Question

In which of the allotropes of carbon, every carbon atoms is bonded to three other carbon atoms.

• A. Graphite
• B. diamond
• C. Fullerene
• D. No allotrope meets such a condition.

Answer 1

Answer: (A), (C)

The correct options are
A

Graphite

C

Fullerene

Graphite and Fullerene are the allotropes of carbon in which each atom is bonded to three other carbon atoms. One electron of every is delocalised (free to move around the entire structure), thus making them conduct electricity.

On the other hand, each carbon atom in diamond is bonded to four other carbon atoms. So, there are no free electrons for carrying electricity.