Question

Why do we separate substances in a mixture?
i) To separate two different but useful components.
ii) To remove useless components.
iii) To remove impurities.

• A. Only (i) and (ii) are correct
• B. Only (ii) and (iii) are correct
• C. Only (i) and (iii) are correct
• D. (i), (ii) and (iii), all are correct

Answer 1

The correct option is D (i), (ii) and (iii), all are correct

We separate substances in a mixture to obtain useful components, remove useless components and impurities.
Example: We separate pebbles from rice and pulses. As pebbles are useless and impure substances.
Another example: Churning of milk gives butter. Hence, both components are useful. Butter is heavy part which is dissolved in milk. It is getting separated by using the method of centrifugation.