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Properties of Metals

An unknown ma...

Question

An unknown material is found to be non-sonorous, non-malleable, and a poor conductor of electricity. It cannot be:

A

Phosphorus

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B

Iron

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C

Sulphur

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D

Charcooal

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Solution

The correct option is B Iron

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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. The property/properties which enable copper metal to be used for making electric wires is / are :
(a) copper metal is malleable and ductile
(b) copper metal is a good conductor of electricity
(c) copper metal is ductile and has low electrical resistance
(d) copper metal is sonorous and an excellent conductor of electricity

An unknown material is found to be bad conductor of heat and electricity, non-sonorous and non-malleable. It cannot be:

Q. An unknown material 'X' is found to be non-sonorous, non-ductile and a poor conductor of electricity. X cannot be:

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.

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