In high temperature carbonisation (as compared to low temperature carbonisation) of coal___________________?
Correct answer: A. All A., B. and C.
- A. All A., B. and C.
- B. Tar yield is less but free carbon in tar is more
- C. Calorific value of coke oven gas is less
- D. Coke oven gas yield is more
Explanation
High-temperature carbonisation produces more coke-oven gas, while the tar yield falls and its free-carbon content rises. The gas also contains more hydrogen and less methane, giving it a lower calorific value, so all three statements apply.
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