Question

y we need separation method​

Answer 1

A mixture is actually made up of pure substances only. But they get mixed with each other in a mixture. Sometimes the individual pure substances are more important than the mixture.

Thus, separation of substances is necessary to obtain pure substances for domestic purposes, industrial purposes and research work.

Answer 2

Answer:

To obtain oxygen in its pure form and remove impurities from it, we need to separate it from the air. This is why separation of substances is necessary.

XD this ans is scientific...