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Which one of the following is the purest form of carbon? 

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Which one of the following is the purest form of carbon? 

(a) Charcoal  

(b) Coke

(c) Fullerene

(d) Carbon black

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(c) Fullerene

The purest form of carbon is fullerenes since they have a smooth structure without dangling which can be utilised completely (98-99%).

Fullerene is an allotrope of carbon having single and double carbon bonds forming a closed mesh.

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