Fixed carbon in coal is defined as______________________?
Correct answer: D. Hundred minus the percentage of volatile matter, ash and moisture
- A. That present in volatile matters
- B. The total quantity of carbon present in the coal
- C. The one which is present in the residue after combustion
- D. Hundred minus the percentage of volatile matter, ash and moisture
Explanation
Fixed carbon is obtained by difference in proximate analysis: 100 minus the percentages of moisture, volatile matter and ash. It is not the total carbon, because some carbon is present in the volatile matter.
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