alleryDinitrogen is produced commercially from air by fractional:
ASedimentation
BDistillation
CFiltration
DEvaporation
Answer & Solution
Correct answer: B. Distillation
1. Air is first cooled until it liquefies.
2. The liquid is then separated by boiling point.
3. That is fractional distillation.
_Source: syllabus Chemistry, Chapter 7, The p-Block Elements._
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