Oxygen is industrially prepared by which process ?
Combustion
Fractional Distillation
Oxidation
Reduction
Gases can be liquified by lowering the temperature and applying pressure.Oxygen is industrially produced by fractional distillation of liquified air.
Which of the following cannot be separated from air by the process of fractional distillation ?
(a) oxygen (b) argon (c) hydrogen (d) nitrogen