Question

A soft and brown form of coal which contains 50 to 60% carbon is called __________.
Anthracite
Sub-bituminous coal
Bituminous coal
Lignite​

Answer 1

Explanation:

Bituminous coal

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Answer 2

• Lignite, often referred to as brown coal, is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It is considered the lowest rank of coal due to its relatively low heat content. It has a carbon content around 25 to 35 percent.