Question

Out of the allotropes of which element one is an insulator, second one is a poor conductor and third one is a super conductor of electricity?

Answer 1

Carbon is capable of forming many allotropes due to its valency. Well-known forms of carbon ... Unlike diamond, graphite is an electrical conductor. ... Each carbon atom contributes one electron to a delocalised system of electrons ... (such as in technologies for use in space), graphite was found to be a very poor lubricant.