A) Bituminous, Anthracite, Lignite, Peat
B) Anthracite, Bituminous, Lignite, Peat
C) Anthracite; Lignite, Peat, Bituminous
D) Anthracite, Peat, Bituminous, Lignite
Correct Answer: B
Solution :
[b] Quality of coal is determined by its carbon content. Accordingly, following is the sequence of four types of coal in descending order of quality.Coal | Percentage of carbon content |
Anthracite | 80 - 95 |
Bituminous | 60 - 80 |
Lignite | 40 - 60 |
Peat | 40 - 55 |
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