The softest and the hardest coal among the following are _ and ___ respectively.

lignite and anthracite

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anthracite and bituminous

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sub-bituminous and Lignite

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anthracite and lignite

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Solution

The correct option is A
lignite and anthracite

The types of coal in increasing order of their hardness are:

Lignite < Sub-Bituminous < Bituminous < Anthracite

Hence, lignite is the softest while anthracite is the hardest variety of coal.

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Similar questions

Which of the following is/are a type of coal?

1. Anthracite
2. Bituminous
3. Sub-bituminous
4. Peat
5. Lignite

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