Question

Select a non-homogeneous system from the following.

(a) Salt solution

(b) Sugar solution

(c) Glucose in water

(d) Saturated solution of NaCl

I got this question during an online interview.

This intriguing question comes from Gibb’s Phase Rule in section Phase Rule of Engineering Chemistry I

Answer 1

Correct answer is (d) Saturated solution of NaCl

Explanation: A homogeneous mixture is one which is miscible completely with one another. In any saturated solution, when the amount of solute reaches more than a critical point, then the solution becomes heterogeneous.