Question

give reasons
separation of mixture becomes essential

Answer 1

But they get mixed with each other in a mixture. Sometimes the individual pure substances are more important than the mixture. ... Hence, we need to separate both from each other.Thus, separation of substances is necessary to obtain pure substances for domestic purposes, industrial purposes and research work.

Answer 2

Answer:

Among various components of a mixture, there are so many substances, which could be harmful or not useful. To eliminate those harmful or useless components, we should separate them.

Example:

(a) Coffee powder is separated from the liquid with a strainer while preparing a coffee.

(b) Stones are picked out by hand from wheat, rice etc.