Q. A hard coal containing little volatile matter is called
Solution:
Coal is also called black gold. Coals are classified into Peat, Lignite, Bituminous, and Anthracite.
Lignite:
– Brown coal
– Lower grade coal
– Moisture content is high (over 35 percent)
Bituminous Coal:
– Soft coal; most widely available and used coal.
– Derives its name after the liquid called bitumen
– 40 to 80 percent carbon
– Moisture and volatile content (15 to 40 percent)
Anthracite Coal:
– Best quality; hard coal.
– 80 to 95 percent carbon.
–
Very little volatile matter
– Negligibly small proportion of moisture
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