Fertiliser plants get their N2 requirements _____________________?
Correct answer: C. By fractionation of liquefied air
- A. From coal gas (coke oven gas)
- B. By dissociating oxides of nitrogen
- C. By fractionation of liquefied air
- D. From producer gas
Explanation
Ammonia synthesis requires nitrogen from air, which can be obtained industrially by fractional distillation of liquefied air. The other gases are possible fuel or gasification sources, not the standard direct nitrogen source.
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