Question

Properties and uses of allotropes of carbon

Answer 1

The phenomenon of some elements existing in different forms which vary in physical and chemical properties is called allotropy.
Allotropy of Carbon
Carbon exists in crystalline as well as amorphous forms.
Crystalline forms of carbon are:
Diamond
Properties -Diamond is the hardest solid known and has a density of 3.51g/cm3
Graphite
Properties -Graphite has a density of 2.2g/cm3 and unlike diamond, it is very soft.
Fullerenes
Unlike diamond and graphite, they have discrete molecules containing large number of carbon atoms. The first fullerene is bulkminsterfullerene.

Amorphous of carbon given in picture

Some Useful Properties of Carbon are:

Adsorption- A Physical Property
Adsorption is a phenomenon in which a thin layer of a solid, liquid or gas is formed on the surface of a solid or a liquid.

Chemical Properties
◆Reaction with oxygen or air
◆Reducing properties
●Reduction of metal oxides
●Reduction of water.

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