Question

what are the different types of coal on what basis their classified​

Answer 1

Answer:

there are three type of coal are lignite , bituminous coal and anthracite.

they are classifieds on the basis of oxygen,carbon and hydrogen present in the coal

Answer 2

Answer:

The four types of coal are peat, lignite, bituminous, and anthracite. ... Lignite has a higher heat content than peat but is still not the most desired form of coal. However, lignite makes up almost half of our known coal reserves. Bituminous coal is formed as more pressure is applied to lignite coal.

they can be classified in rock types. based on the petrological.components known as macerals.