A. By fractionation of liquefied air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. From producer gas
Correct Answer: By fractionation of liquefied air ✔
Last Updated: March 11, 2019
A. By fractionation of liquefied air
B. By dissociating oxides of nitrogen
C. From coal gas (coke oven gas)
D. From producer gas
Correct Answer: By fractionation of liquefied air ✔
Last Updated: March 11, 2019