Question

Compare the structure of diamond and graphite and explain any one property of is based upon the structure.
(class 10 CBSE SAMPLE PAPER 2017-18 SCIENCE)

Answer 1

SOLUTION:
In diamond each carbon atom is bonded to 4 other carbon atoms by covalent bonds resulting in the formation of a three-dimensional network structure.Due to the presence of strong covalent bonds, diamond is hard and has high melting point.

In graphite each carbon atom is bonded to three other carbon atoms to form hexagonal rings which are held Together by weak van der  Waals’ force of attraction. Therefore graphite has a two dimensional sheet  like structure. Due to the presence of one free electron left with each carbon atom graphite is a good conductor of electricity.

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