what is the coal ? simplify with example
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it is a carbon compund having inflammable property
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Coal is a hard rock which can be burned as a solid fossil fuel. It is mostly carbon but also contains hydrogen, sulphur, oxygen and nitrogen. It is a sedimentary rock formed from peat, by the pressure of rocks laid down later on top. ... Also wood heated in an airless space can make charcoal, which is like coal.
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