A. High production of CO2
B. Low production of CO2
C. High production of CO
D. Both B. and C.
A. Lignite
B. Bituminous coal
C. Semi-anthracite
D. Anthracite
A. Is present upto 1-2%
B. Comes from protein in parent vegetable matter
C. Is recovered as ammonia during its carbonisation
D. All A., B. and C.
A. Low octane number
B. High cost & availability
C. Low flash point
D. Low calorific value
A. Shallow and small piles
B. Fine sizes without the presence of any lump
C. Closed space without any ventilation facility
D. Large heaps with small surface to volume ratio
A. Low calorific value
B. High volatile matter
C. Low ash content
D. Non smoking tendency
A. Produce weak coke
B. Produce strong coke
C. May damage the coke oven walls during carbonisation
D. Both B. and C.