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Difficulty: EasyMineral and Energy Resources of India

Arrange the following types of coal found in India in descending order of their carbon content and quality (from highest carbon content to lowest):

  1. 1Anthracite
  2. 2Bituminous
  3. 3Lignite
  4. 4Peat

Answer

The correct sequence of coal types in descending order of carbon content is Anthracite, Bituminous, Lignite, and Peat.
Anthracite possesses the highest carbon content (>80-95%), followed by Bituminous (60-80%), Lignite (40-55%), and Peat (<40%). Therefore, arranging them from highest to lowest carbon content yields Anthracite, Bituminous, Lignite, and Peat.

Step-by-Step Solution

1
Determine the carbon percentage for each variety of coal.
Anthracite has 80–95% carbon, Bituminous has 60–80%, Lignite has 40–55%, and Peat has under 40%.
Coal rank increases with carbon content and calorific value due to heat and pressure over geological time.
2
Order the coal types from highest carbon content to lowest.
Anthracite → Bituminous → Lignite → Peat.
This matches the descending order requirement.

Key Concept

Classification of Coal Grades by Carbon Content
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Topics

Mineral and Energy Resources of India

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