10. What are the crystallization’s initial materials? a) Liquid, aqueous solution, emulsion b) Gas, aqueous solution, foam c) Aqueous solution, melt, glass or gel d) Solid, gas, melt, solid aerosol
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.
