The pure form of carbon is 1.diamond 2.graphite 3.charcoal 4.fullerene
Answers
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The purest allotrope of carbon is 1. Diamond.
Explanation:
Carbon chemistry is the wide and vast area of chemistry. Carbon is the basic organic matter consists in all living things. Carbon exists in many allotropic forms due to its valency. Few of the allotropes of carbon are diamond, graphite, lonsdaleite, buckminsterfullerene, amorphous carbon, buckytube, etc.
The arrangement of carbon atoms in each of the allotropic form of carbon is different. The purest allotrope of carbon is diamond.
Carbon atoms in diamond are more tightly bound and packed compared to graphite (graphite is also the hardest material known). So, it is difficult for "impurities" to get into "diamond lattice". This results diamond are often more pure than graphite.
A 100% pure diamond would be totally transparent.