In which of the following allotropes of carbon, percentage of carbon is maximum?

Graphite

The correct answer is 2. Graphite.

Graphite is an allotrope of carbon that has a layered structure. Each layer is made up of carbon atoms arranged in a hexagonal lattice. The carbon atoms in each layer are bonded to each other by strong covalent bonds. The layers are held together by weak van der Waals forces.

Graphite is the most stable form of carbon and has a high percentage of carbon. The percentage of carbon in graphite is about 90-95%. Wood charcoal and coconut charcoal are both made from the carbonization of wood and coconut shells. The percentage of carbon in wood charcoal and coconut charcoal is about 85-90%.

Therefore, the allotrope of carbon with the maximum percentage of carbon is graphite.

Here is a table of the percentage of carbon in different allotropes of carbon: