Which of the following petrographic constituents of coal is non-coking ?
Correct answer: D. Fussain
- A. Vitrain
- B. Clarain
- C. Durain
- D. Fussain
Explanation
Fusain is a porous, brittle, charcoal-like coal constituent that is non-caking and therefore non-coking. Vitrain, clarain and durain may contribute to coking behaviour under suitable conditions.
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