Discussion :: Lithosphere
- The highest grade of coal whose surface is shining and has the highest calorific value, is ________
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Answer : Option A
Explanation :
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.
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