Question

What is the purpose of extraction?

(a) Separate an organic substance from a mixture

(b) Separate an inorganic substance from a mixture

(c) Separate both organic and inorganic substance from a mixture

(d) Separate dust from a mixture

I had been asked this question in an internship interview.

This interesting question is from Contact Equilibrium Separation Process topic in chapter Contact Equilibrium Separation Process of Food Processing Unit Operations

Answer 1

Right answer is (a) Separate an organic substance from a mixture

To explain I would say: Extraction is the recovery of a substance from a mixture by bringing it into contact with a solvent, which dissolves the desired material. It is a suitable method for separating organic substance from a mixture.