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Physical Properties of Non-Metals

19. Name the ...

Question

19. Name the following:a) A metal which is kept under kerosene.b) A lustrous coloured non metal.c) A metal which can melt while kept on palm.d) A metal which is a poor conductor of heat.

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Solution

a) Sodium is kept under kerosene.

b) Iodine is a lustrous coloured non metal.

c) Gallium is a metal which can melt while kept on palm.

d) Lead is a metal which is a poor conductor of heat.

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Name the following : [3 MARKS]

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.
(e) An element which melts when kept on the palm.
(f) Good conductor of heat.

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 the following:

(a) A lustrous liquid metal.
(b) A liquid non-metal
(c) A metal which can be cut with a knife
(d) A non-metal which is good conductor of electricity.

Name

(a) a soft metal.

(b) a metal which is brittle.

(c) a non-metal which is lustrous.

(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.

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:

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