The highest grade of coal whose surface is shining and has the highest calorific value is ?
Correct answer: D. Anthracite
- A. Lignite
- B. Peat
- C. Bituminous
- D. Anthracite
Explanation
Anthracite is the hardest and highest-grade coal, with the greatest carbon content, a bright appearance, and the highest calorific value. Peat and lignite are lower-grade fuels, while bituminous coal ranks below anthracite.
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