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Which one of the following materials is not an allotrope of carbon?

Options

  1. ADiamond
  2. BGraphene
  3. CFly ash
  4. DFullerene

Correct answer

C. Fly ash

Step-by-step solution

- When an element exists in more than one crystalline form, those forms are called allotropes. - The two most common allotropes of carbon are diamond and graphite. - Graphene is a two dimensional one atom thick allotrope of Carbon. Electrons in grapheme behave as massless relativistic particles. It is a 2 dimensional nanomaterial with many peculiar properties - Fly ash is not an allotrope of carbon.

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