Question

explain the origin of coal and name it's various varieties. class 8 cbse​

Answer 1

Coal is classified into four main types, or ranks: anthracite, bituminous, subbituminous, and lignite. The ranking depends on the types and amounts of carbon the coal contains and on the amount of heat energy the coal can produce.

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Answer 2

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Coal is formed when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial over millions of years. ... However, many significant coal deposits are younger than this and originate from the Mesozoic and Cenozoic eras. Coal is primarily used as a fuel.

Child material class:

• Lignite

Sub-types:

• Cannel coal

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