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

Naturally mined diamonds

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Fullerenes

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Laboratory made diamonds

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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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Similar questions

One of the following is not an allotrope of carbon. This is :
(a) diamond (b) graphite (c) cumene (d) buckminsterfullerene

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