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Question

Which of the following are the crystalline forms of carbon?

A
Diamond
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B
Graphite
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C
Coke
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D
Fullerene
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Solution

The correct options are
A Diamond
B Graphite
D Fullerene

The crystalline forms have definite geometrical shape and regular arrangement of atoms in their structure. Among the allotropes of carbon, diamond, graphite and fullerenes are crystalline.

However, coke neither has a definite geometrical shape nor a regular arrangement of atoms in its structure and hence, is an amorphous forms of carbon.


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