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

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Professor PC Thomas Classes · Answer

(c) : Air is liquefied by making use of the Joule Thomson effect (cooling by expansion of the gas). Water vapour and $\mathrm{CO}_{2}$ are removed by solidification. The remaining constituents of liquid air i.e., liquid oxygen and liquid nitrogen are separated by means of fractional distillation as fractional distillation is a process of separation of mixture based on the difference in their boiling points. (\href{http://b.pt}{b.pt}. of $\mathrm{O}_{2}=-183^{\circ} \mathrm{C}$ : \href{http://b.pt}{b.pt}. of $\mathrm{N}_{2}=-195.8^{\circ} \mathrm{C}$ ).\