Question

Name the four main types of coal.

Answer 1

Coal: Coal is a black or brownish-black rocky material with a high amount of carbon and hydrocarbons.

The four main types of coals are given below:

• Peat - It is a soft, dark brown substance, that contains 50% - 60% Carbon content.
• Lignite (Soft coal)- It is brown in colour and the lowest quality of coal, contain 60% - 70% Carbon content.
• Bituminous (Household coal)- It is the second highest quality of coal, containing 75% - 80% Carbon content.
• Anthracite (hard coal)- It is a dark black form of coal and the highest quality coal. It is very hard and contains 90% - 95% Carbon content.

Therefore the coal is classified based on the Carbon($\mathrm{C}$) content in the type of coal.