__________ is the hardest substance that occurs naturally.

Diamond

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Coal

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Coke

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Graphite

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Solution

The correct option is A Diamond
Natural diamonds are formed by the action of high pressure and temperature on the carbon present in earth at depths of 150 Km or more. They are brought to Earth by volcanic eruptions. Diamonds are the purest form of carbon and the hardest substance that occurs naturally.

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Similar questions

Which of the following is hardest naturally occurring substance?

Name the following :

(a) The hardest naturally occurring substance.

(b) A greyish black non-metal that is a good conductor of electricity.

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