Question

________ is a separation technique that produces highly pure solids.
filtration
sublimation
crystallization
chromatography

Explanation:

Filtration separates solids from liquids by size, sublimation changes a solid directly to a gas and back, chromatography separates components based on different affinities. Crystallization is a process that forms highly - pure solids from a solution as the solute comes out of the solution in an orderly manner.

Answer:

crystallization