Question

13. Name the 4 main varieties of coal.​

Answer 1

Answer:

Charcoal

fuel coal

diamond coal

I know only three

Answer 2

Answer:

There are four major types (or “ranks”) of coal.

The four ranks are:

• Anthracite: The highest rank of coal. ...

• Bituminous: Bituminous coal is a middle rank coal between subbituminous and anthracite. ...

• Subbituminous: Subbituminous coal is black in color and dull (not shiny), and has a higher heating value than lignite.