Question

21- Why do we need to remove certain Components mixed in a substance sometimes before use.​

Answer 1

Answer:

Some substances can be useless or harmful. If we remove them we could get the required product.

Explanation:

We see that, before we use a substance, we need to separate harmful or non-useful substances that may be mixed with it. Sometimes, we separate even useful components if we need to use them separately. The substances to be separated may be particles of different sizes or materials.

Answer 2

Answer:

We need to remove certain components mixed in a substance before use as those components are impurities and the substance can't be used with them.