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Question
Which of the following allotropes of carbon has a hexagonal-layered structure?
Which of the following allotropes of carbon has a hexagonal-layered structure?
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Solution
The correct option is B Graphite
Coal is an amorphous allotrope of carbon. It does not have a definite arrangement of carbon atoms.
In the structure of a diamond, there is a tetrahedral arrangement of carbon atoms such that each carbon atom is covalently bonded to four other neighbouring carbon atoms in three dimensions.
Buckminsterfullerene is composed of 60 carbon atoms and its structure resembles a football with 12 pentagonal and 20 hexagonal faces.
Graphite has a layered structure with alternate layers lying vertically beneath each other. In each layer of graphite, there is a hexagonal arrangement of atoms with each carbon atom forming a strong covalent bond with three other neighbouring carbon atoms. Thus, graphite has a hexagonal-layered structure.
Coal is an amorphous allotrope of carbon. It does not have a definite arrangement of carbon atoms.
In the structure of a diamond, there is a tetrahedral arrangement of carbon atoms such that each carbon atom is covalently bonded to four other neighbouring carbon atoms in three dimensions.
Buckminsterfullerene is composed of 60 carbon atoms and its structure resembles a football with 12 pentagonal and 20 hexagonal faces.
Graphite has a layered structure with alternate layers lying vertically beneath each other. In each layer of graphite, there is a hexagonal arrangement of atoms with each carbon atom forming a strong covalent bond with three other neighbouring carbon atoms. Thus, graphite has a hexagonal-layered structure.
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