Which of the following is not an allotropic form of carbon?

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Fluorine

Fullerene

Diamond

Graphite

answer is A.

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Detailed Solution

Concept- Allotropes of carbon are the various forms of carbon that can be found in nature. These forms exist in the same state but have many physical characteristics in common. The ability of an element to exist in several physical forms, even in the same state, is known as allotropy.
This results from the many forms of the element's different structural characteristics. In general, there are three possible allotropic forms of carbon, each of which is referred to as an allotrope of the substance. Allotropes are most abundant in carbon. This is a result of its catenation and tetravalency properties.
Tetravalency is the ability to share four electrons with other atoms to form bonds, and catenation is the ability to construct long chains of compounds. There are three different allotropic forms of carbon: Fullerene, Diamond, and Graphite.
Fluorine is not a carbon form instead it is a halogen.
Hence, the correct answer is option 1.

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