Question

What kind of crystalline solid is graphite?
A) Metallic
B) Ionic
C) Molecular
D) Covalent- network

Answer 1

Option d oka thnkuuuu

Answer 2

Answer:

Graphite is covalent network crystalline solid.

Therefore, option (d) is correct.

Explanation:

In the covalent crystal, the constituent particles are the atoms which are linked together in a continuous system of covalent bonds throughout the crystal.

• There is continuous network of covalent bonds forming a giant molecules in three dimensional structure.
• In graphite each carbon is sp² hybridized and is covalently bonded to other three carbon atoms by single bonds.
• The fourth electron in each carbon results in the formation of pi -bonds.
• In this way graphite consists the hexagonal rings in two dimensions. These array forms layers.
• The layers are separated by distance of 340pm. The large distance between the layers indicates the Vander Waal's force of attraction between the layers which holds the layer together. It is also responsible for the soft nature of graphite.
• The pi electrons in the rings of graphite are delocalized and are relatively free to move in the influence of electric field.
• Graphite is a covalent solid and soft and good conductor of electricity.

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