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1990 WAEC Chemistry Theory Liquefied air is mainly a mixture of nitrogen and oxygen which can be separated into...

Chemistry
WAEC 1990

Liquefied air is mainly a mixture of nitrogen and oxygen which can be separated into its components by fractional distillation (Boiling point of nitrogen is 196°C, Boiling point of oxygen is 174°C)

(a) Name the fraction which distills over first. Give the reason for your answer.

(b) Give another industrial application of fractional distillation as a separation technique.
 

 

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Explanation

(a) Nitrogen distils over first before oxygen because nitrogen has lower boiling point and it is therefore more volatile than oxygen

(b) Fractional distillation of petroleum


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