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Byju's Answer
Standard XII
Chemistry
Fullerenes
Which of the ...
Question

Which of the following is not considered to be an allotrope of carbon?

A
Naturally mined diamonds
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B
Fullerenes
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C
Laboratory made diamonds
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D
Cubic zirconia
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Solution

The correct option is D Cubic zirconia
Carbon exist in 2 allotropic forms 1 st is crystalline and second is amorphous
Crystalline Allotrops: Diamond Graphite and Fullerene
Amorphous Allotrpes: Carbon block . Lamp black and coke

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