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Conductors and Insulators

Non-metals ar...

Question

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

The allotropic form of a non-metal, which is a good conductor of electricity is:

A

Graphite

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B

Diamond

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C

Rhombic sulphur

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D

None of these

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Solution

The correct option is A Graphite
Graphite, which is an allotrope of carbon, is a good conductor of electricity due to presence of free electrons.

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Q. Question 30
Non-metals are usually poor conductors of heat and electricity. They are non-lustrous; non-sonorous; non-malleable and are coloured.
(a) Name a lustrous non-metal.
(b) Name a non-metal which exists as a liquid at room temperature.
(c) The allotropic form of a non-metal is a good conductor of electricity. Name the allotrope.
(d) Name a non-metal which is known to form the largest number of compounds.
(e) Name a non-metal other than carbon which shows allotropy.
(f) Name a non-metal which is required for combustion.

Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured.

Which of the following is/are lustrous non-metals?

Non metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are colour.

Name a non - metal which exists as a liquid at room temperature.

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable and are coloured. The non-metal which is known to form the largest number of compounds is:

Non-metals are usually poor conductors of heat and electricity. They are non-lustrous, non-sonorous, non-malleable, and are colored.

Non-metal which is required for combustion is ______________.

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