Question

which physical method can be used for obtaining a sample of salt from a small beaker of salt water? boiling freezing chromatography sorting

Explanation:

Boiling salt - water causes the water to evaporate as steam, leaving the salt behind as a solid residue. Freezing separates components based on different freezing - points, not suitable here. Chromatography separates based on different affinities for a stationary and mobile phase, not for salt - water separation. Sorting is for separating solid mixtures by physical characteristics, not for salt - water.

Answer:

A. boiling