Which of the following is not a crystalline allotropic form of carbon?
Graphite
Diamond
Fullerene
Coal
Ishita wanted to select one of the allotropic forms of carbon as a lubricant for fast moving machinery parts. Which material should she use and why?
(Hint: Recall the structure and uses of crystalline forms of carbon.)
Write 'True' or 'False' for the following statement:
Coke and coal are crystalline allotropic forms of carbon.