Answer:
The fractional distillation of liquefied air occurs owing to the differences in boiling points of the com- ponent gases. As the warming begins, the liquefied gases will vaporize in boiling point order. This demonstration is a 1-plate fractional distillation, therefore, the separation is not complete.
Step-by-step explanation:
Air is compressed by increasing the pressure and then cooled by decreasing the temperature in order to get liquid air. This liquid air is allowed to warm-up slowly in a fractional distillation column, where gases get separated at different heights depending upon their boiling points.