Question

How can we obtain different gases from liquid air?

Answer 1

Hint: We have to know that the liquid air can be prepared by cooling in the presence of very low temperature and there is a formation of mobile liquid with pale blue in colour. And this liquid air should be kept in specialized containers. It can be thermally insulated by using the room temperature. The liquid air can be easily converted into gaseous state by the absorption of heat. This is mainly used as an intermediate step for the preparation of oxygen, nitrogen and all other inert gases.

Complete answer:
We can acquire different gases from the liquid air by the fractional distillation process. The liquid air completely contains a mixture of homogeneous gases. And the composition of gases may be oxygen, nitrogen, argon, carbon dioxide, etc with different amounts. Therefore, the separation is done by using special techniques. And that is fractional distillation. This is the technique for using the extraction of various components which are present in the air. The liquid air is prepared by compressing by using high pressure with lower temperature. And in a fractional distillation column, the liquid air is supposed to slowly warm up. Then the gases are starting to separate at different heights according to their boiling points.

Note:
We need to remember that the gases are prepared from liquid air by a fractional distillation process by continuous compression and cooling. And the gases extracted from liquid air are oxygen, nitrogen, carbon dioxide, and argon. The liquid nitrogen is obtained first from this liquid air. Because it has a higher boiling point than others, which is equal to \[190^\circ C\].