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Question

Identify the true statement from the following


A

All metals have fixed melting points whereas non metals do not

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B

All metals are malleable

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C

The hardest substance known is a non-metal

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D

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


Diamond, a form of carbon, is the hardest known mineral according to Mohs scale and is the hardest substance known.


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