Which one of the following statements is NOT correct ?

  1. A. Diamond is hard due to extended covalent bonding in it
  2. B. Fullerene is composed of five and six membered rings
  3. C. Diamond is a good conductor of electricity
  4. D. Graphite is used as a lubricant

Correct Answer: C. Diamond is a good conductor of electricity

Explanation

Diamond is a poor conductor of electricity because it does not have any delocalized free electrons to carry charge.

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