Which is the highest heat producing grade of coal?
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anthracite ,bitaminous,subbitaminous, lignite
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Anthracite is a variety of coal which consists of low sulphur and high carbon. It is considered as the topmost rank of the coal.
The moisture content of anthracite is generally below 15 %. It is highest hat producing grade of coal. The Anthracite is the purest form of coal.
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