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Assertion :- (A) Graphite is good cond...

Assertion :- (A) Graphite is good conductor of electricity however diamond belongs to the category of insulators .
Rason (R ) Grapite is soft in anture on the hand diamond is very hard and brittle.

Text Solution

Verified by Experts

The correct Answer is:
B
Correct reason : In graphite, each carbon is bonded to three other carbon atoms in layers and the fourth electron is free to move. Therefore, graphaite is a good conductor of electricity . Diamond is a covalent network solid in which each carbon atom is bonded to four other carbon atoms.
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Assertion (A): Graphite is a good conductor of electricity, however, diamond belongs to the category of insulators. Reason (R): Graphite is soft in nature, on the other hand diamond is very hard and brittle.

Why is graphite a good conductor of electricity but diamond is not?

Assertion (A) : Diamond is a good conductor of electricity Reason (R) : Diamond and graphite are two allotrope carbon and graphite is a good conductor of electricity

Assertion (A) : Graphite is chemically more reactive than diamond . Reason (R) : Diamond is very hard but fraphite si soof .

Assertion (A) : Graphite is soft while diamond is very hard . Reason (R) : Graphite has a hree -dimensional structure while diamond has planer struture .

Assertion : Diamond is a bad conductor . Reason : Graphite is a good conductor.

(A) Graphite is soft while diamond is hard. (R) Graphite has three dimensional structure while diamond has planar.

Assertion : Among the carbon allotropes, diamond is an insulater, wherea, graphite is a good conductor of electricity. Reason : Hybridization of carbon in diamond and graphite are sp^3 and sp^2 , respectively.