What type of coal is characterized by its low quality, brown color, soft texture, and high water content?
Show answer & explanation
Correct answer: B
Explanation
The correct answer is option 2 i.e. Lignite.
Lignite is a low-grade coal easily identified by its brownish-black color, soft texture, and crumbly nature. It contains high moisture levels (25-35%), which significantly lowers its energy efficiency and heating value. With the lowest carbon content (25-35%) among all coal types, it ranks as the least calorific and least efficient for energy production. Due to its poor energy density and high water content, lignite is not economically viable to transport over long distances.
Other Options:
- Anthracite – Hard, shiny, high-carbon (86-98%), low moisture.
- Bituminous – Medium-grade, black, used for coking (steel production).
- Metallurgical – High-quality, processed for industrial use.
Lignite’s high moisture and low carbon define it as the poorest-quality coal.