Which is Hardest non metal

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Solution

-»DIAMOND is the hardest natural non-metal.

»SILICON CARBIDE is the hardest artificial non-metal.

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Name

(a) a soft metal.

(b) a metal which is brittle.

(d) a liquid metal.

(e) a metal which is a poor conductor of electricity.

(f) a non-metal which is a good conductor of electricity.

(g) a liquid non-metal.

(h) the hardest naturally occurring substance.

(i) an inert gas.

1.	Non-metal with metallic lustre	....................
2.	A non-metal that is the hardest substance known	....................
3.	Metal that can be cut with a knife	....................
4.	Non-metal that is a good conductor of electricity	....................
5.	Metal that is stored in kerosene	....................

Match the entries of column I with column II.

Material	Exception
(a) Iodine (Non-metal)	(i) Exists in liquid state
(b) Diamond (Non-metal)	(ii) Conducts electricity
(c) Mercury (Metal)	(iii) Lustrous
(d) Graphite (Non-metal)	(iv) Hardest natural substance

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