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It is possible to obtain oxygen from air by fractional distillation because

1. oxygen is in a different group of the periodic table from nitrogen
2. oxygen is more reactive than nitrogen
3. oxygen has higher b.p. than nitrogen
4. oxygen has a lower density than nitrogen

Correct answer: oxygen has higher b.p. than nitrogen

Solution

Fractional distillation separates components based on differences in boiling points. Oxygen has a higher boiling point (-183°C) than nitrogen (-196°C), allowing it to be separated effectively.

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