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Class 11
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The p Block Elements
explain the difference in properties of diamond an...

Question:
Explain the difference in properties of diamond and graphite on the basis of their structures.

Answer:

Diamond	Graphite
It has a crystalline lattice.	It has a layered structure.
In diamond, each carbon atom is sp³ hybridised and is bonded to four other carbon atoms through a σ bond.	In graphite, each carbon atom is sp² hybridised and is bonded to three other carbon atoms through a σ bond. The fourth electron forms a π bond.
It is made up of tetrahedral units.	It has a planar geometry.
The C-C bond length in diamond is 154 pm.	The C-C bond length in graphite is 141.5 pm.
It has a rigid covalent bond network which is difficult to break.	It is quite soft and its layers can be separated easily.
It acts as an electrical insulator.	It is a good conductor of electricity.

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Question:
Explain the difference in properties of diamond and graphite on the basis of their structures.