Question

What are the starting materials for crystallization?

(a) Gas, aqueous solution, foam

(b) Liquid, aqueous solution, emulsion

(c) Solid, gas, melt, solid aerosol

(d) Aqueous solution, melt, glass or gel

This question was addressed to me in unit test.

My doubt is from Crystallization of Solutions, Melts, Glasses and Gels in portion Preparative Methods of Solid State Chemistry

Answer 1

Correct answer is (d) Aqueous solution, melt, glass or gel

The explanation is: Explanation: Aqueous solution, melt, glass or gel, is usually homogenous, single phase and                                          amorphous. This may greatly facilitate formation of crystalline product, since long range diffusion of ions may not be necessary and the product my form at lower temperature.