Identify the true statement from the following

All metals have fixed melting points whereas non metals do not

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All metals are malleable

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The hardest substance known is a non metal

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Tungsten is a good conductor of heat and electricity.

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Solution

The correct option is C The hardest substance known is a non metal
The allotrope of carbon, diamond, is the hardest known mineral according to Mohs scale. This hardness is attributed to the strong covalent bonds between the carbon atoms in its tetrahedral lattice structure.

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Similar questions

Q. A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify Y and Z.

Question 43
A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z.

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.

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:

Q. Identify the non-metal which is a good conductor of electricity.

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Identify the true statement from the following

The correct option is C The hardest substance known is a non metalThe allotrope of carbon, diamond, is the hardest known mineral according to Mohs scale. This hardness is attributed to the strong covalent bonds between the carbon atoms in its tetrahedral lattice structure.

The correct option is C The hardest substance known is a non metal
The allotrope of carbon, diamond, is the hardest known mineral according to Mohs scale. This hardness is attributed to the strong covalent bonds between the carbon atoms in its tetrahedral lattice structure.