Which is the purest form of carbon

GC Metals Non-Metals

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

  1. Charcoal
  2. Coke
  3. Fullerene
  4. Carbon black


Fullerenes are the purest for m of carbon because they do not have 'dangling' edge or surface bonds to be attracted to other atoms as in the case with diamond or graphite. 

The correct option is C.