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Physical Properties of Non Metals

Name a Non-Me...

Question

Name a Non-Metal which is very hard.

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Solution

Diamond:-
Diamond is a non-metal and also an allotrope of Carbon( $C$ ).
Diamond is very hard in nature because the four electrons of carbon atoms are shared with four other carbon atoms by covalent bonds. This forms a rigid tetrahedral crystal.
Therefore, Diamond is a Non-Metal which is very hard in nature.

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Name a metal which is soft and a non-metal which is hard.

Q. (a) Define non-metals. Give five examples of non-metals.
(b) Name a non-metal which conducts electricity.
(c) Name a non-metal having lustre (shining surface).
(d) Name a non-metal which is extremely hard.
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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.

Q. Name a non metal which is very hard.

---------- is a non metal which is very hard.

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