Bright coal__________________?
Correct answer: C. Contains mainly vitrain & clarain and is generally coking
- A. Contains more than 90% durain
- B. Contains more than 90% fussain
- C. Contains mainly vitrain & clarain and is generally coking
- D. Is non-coking
Explanation
Bright coal is composed mainly of the bright bands vitrain and clarain, and it is generally suitable for coking. Durain is dull and fusain is soft, fibrous and non-caking.
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