Question : Which one of the following is not a coal variety?
Option 1: Lignite
Option 2: Bituminous
Option 3: Dolomite
Option 4: Peat
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Correct Answer: Dolomite
Solution : The correct option is Dolomite.
Dolomite is not a coal variety. Dolomite is a type of limestone. It contains a significant amount of calcium and magnesium carbonate. Other minerals are also present in it. Calcium carbonate makes up 60% of dolomite, whereas magnesium carbonate makes up 40%.
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