Multiple choice

___________ is a low-grade brown coal, which becomes soft with high moisture content.

  1. Dolomite

  2. Lignite

  3. Anthracite

  4. Bituminous
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lignite is correctly identified as the lowest grade of coal with high moisture content (often 35-45%) and soft texture. It's brownish-black and has lower carbon content than bituminous coal or anthracite. Dolomite is a mineral, not coal type.

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