Why is graphite generally used as a refractory material for lining electric furnaces?

It has a high melting point.

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It is lustrous.

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It has a layered structure.

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It is a good conductor of electricity.

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Solution

The correct option is A It has a high melting point.
Graphite has a high melting point since in addition to the covalent bonding it also has van der Waals forces between the hexagonal layers of the graphite lattice. Hence, more energy is required is to break these bonds.

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Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

Question 33
Electrical wires have a coating of an insulating material. The material, generally used is
(a) Sulphur
(b) Graphite
(c) PVC
(d) All can be used

C a_{3} (P O_{4})_{2}

is:

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Why is graphite generally used as a refractory material for lining electric furnaces?

The correct option is A It has a high melting point.Graphite has a high melting point since in addition to the covalent bonding it also has van der Waals forces between the hexagonal layers of the graphite lattice. Hence, more energy is required is to break these bonds.

The correct option is A It has a high melting point.
Graphite has a high melting point since in addition to the covalent bonding it also has van der Waals forces between the hexagonal layers of the graphite lattice. Hence, more energy is required is to break these bonds.