Q. Which fuel is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber?
✅ Correct Answer: (C)
coke
Explanation: coal is prepared by heating bituminous coal continuously for 15 to 18 hours in closed chamber in the absence of air 500oc to 700oc. during this process the volatile matter is removed from the coal, leaving a dull black color to coke. it is a hard porous structure and smokeless. it contains 85 to 95% carbon. when the bituminous coal is heated between 900oc to 1000oc, hard coke