Question
Oxygen, argon and nitrogen boil at –182°C, –186°C and –196°C respectively.
Answer the following questions:
(a) Arrange the gases in the increasing value of boiling point.
(b) Which gas forms the liquid first as the air is cooled?
(c) Which gas is obtained first when liquid air boils up?
Solution
(a) In the increasing value of boiling point.
Nitrogen < argon < oxygen
(b) Oxygen forms liquid first as the air is cooled.
(c) Nitrogen has least boiling point. hence it obtained first.
