Question

Generally, non-metals are not conductors of electricity. Which of the following is a good conductor of electricity?

• A. Diamond
• B. Graphite
• C. Sulphur
• D. Fullerene

Answer 1

The correct option is B

Graphite

The explanation for the Correct option:

Option (B) Graphite

1. In Graphite, one Carbon atom is bonded to $3$ other carbon atoms in the same plane and gives a hexagonal array structure.
2. Each carbon atom in a graphite molecule has only one free valence electron, which floats free in the array.
3. Hence, it can conduct electricity because of the free electrons in its structure.
4. As a result, Graphite is considered a good electrical conductor.
5. Hence, it is the correct option

The explanation for incorrect options:

Option (A) Diamond

1. In Diamond, a Carbon atom is bonded to $3$ other carbon atoms, forming a rigid structure.
2. They don't have any free mobile electrons in diamonds.
3. That is why Diamonds are poor electrical conductors.
4. Hence, it is an incorrect option

Option (C) Sulphur

1. Sulphur is a non-metallic element.
2. It is a poor heat and electrical conductor.
3. Because Sulphur lacks the free electrons to transmit electricity.
4. Hence, it is an incorrect option.

Option (D) Fullerene

1. Fullerene is an allotrope made up of carbon like Graphite and Carbon.
2. In fullerene, one carbon forms three sigma bonds with other carbon atoms.
3. The remaining electrons at each carbon are delocalized in molecular orbitals.
4. Fullerene is an insulator in its pure state.
5. Hence, it is an incorrect option.

Therefore, graphite is a good conductor of electricity.