Arrange the following coal types in the increasing order of their carbon percentage?
A. Sub-bituminous
B. Lignite
C. Anthracite
D. Bituminous
E. Peat
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → E, B, A, D, C
Coal is formed by the progressive carbonisation of buried plant matter, so its rank rises in the order Peat → Lignite → Sub-bituminous → Bituminous → Anthracite.
Peat holds under 50% carbon, lignite about 60–70%, sub-bituminous roughly 70–76%, bituminous 78–87%, and anthracite over 90% — making anthracite the hardest coal with the highest calorific value.