Q172
The highest grade of coal whose surface is shining and has the highest calorific value, is ________
A.
Anthracite
AnswerB.
Bituminous
C.
Lignite
D.
Peat
Answer: Option A
Solution
Answer: Option A
Solution:
The highest grade of coal whose surface is shining and has the highest calorific value, is Anthracite. Anthracite, often referred to as hard coal, is a hard, compact variety of coal that has a submetallic luster. It has the highest carbon content, the fewest impurities, and the highest energy density of all types of coal and is the highest ranking of coals.