Multiple choice

Which of the following is the most superior of coals?

  1. Bituminous

  2. Lignite

  3. Peak

  4. Anthracite
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D Correct answer
Explanation

Anthracite is the highest grade of coal, with the highest carbon content (86-97%) and the fewest impurities. It has the highest energy density among all coal types and burns with a clean, blue flame. The ranking of coals from lowest to highest quality is: lignite, sub-bituminous, bituminous, and anthracite at the top.

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