Question

The purest form of coal is:
(A) Peat
(B) Anthracite
(C) Lignite
(D) Bituminous coal

Answer 1

Hint: Coal has four different types when it is chemically processed. The chemical process is known as carbonisation. The purest form of coal depends upon its carbon content. So, look into the carbon content of a variety of coal.

Complete step by step answer:
* We know that coal is a mixture of carbon, hydrogen, and oxygen compounds.
* As we know, coal contains the maximum amount of carbon but the carbon content of coal depends upon its variety.
* The types of coal vary with the temperature and pressure applied to it,
* Now, will look into the types of coal i.e. peat, lignite, anthracite, and bituminous coal.
* If we talk about the peat, it contains 40-50% of the carbon content and is brown colour.
* Talking about the second type i.e. lignite, it contains 60-70% of the carbon content and also known as soft coal.
* Now the third type is anthracite, it contains 90-99% of the carbon content, mainly used in the industries.
* The fourth type is bituminous coal, it contains 60-80% of the carbon content, known as household coal.
* The coal containing the maximum amount of carbon content is considered to be the purest form of coal.
* Here we know the maximum carbon content is in anthracite.
Therefore, the purest form of coal is anthracite. So, the correct option is B.

Note: Don’t be confused between the types of coal obtained by the carbonisation. Just look into the carbon content. There is no need to consider their other properties as we need only the amount of carbon content.