Coke compared to the coal from which it has been made, contains ____________________?
Correct answer: D. All A., B. and C.
- A. Less volatile matter
- B. More carbon
- C. Greater percentage of ash
- D. All A., B. and C.
Explanation
Coking drives off much of coal's volatile matter and concentrates its fixed carbon, while the noncombustible ash becomes a larger percentage of the remaining coke. Thus all three listed changes occur.
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