Question

A solution of exchange of impurities for solvent atoms is called a _________

(a) Interstitial solid solution

(b) Substitutional solid solution

(c) Saturated solution

(d) Unsaturated solution

I had been asked this question during a job interview.

I would like to ask this question from Hume Rothery’s Rules, Types of Solid Solutions in section Solid Solutions & Crystallography of Engineering Material & Metallurgy

Answer 1

The correct option is (b) Substitutional solid solution

The explanation: When the solute atoms (impurities) are substituted for parent solvent atoms in a crystal lattice, the atoms are called substitutional atoms. Such a mixture of two elements is called a substitutional solid solution.