Final answer:
A supersaturated solution, which contains more solute than can be dissolved at a given temperature, is the type of solution that is likely to produce crystals when disturbed.
Step-by-step explanation:
If disturbed, a supersaturated solution is likely to produce crystals. A supersaturated solution is one that contains more solute than can be dissolved in the solvent at a given temperature. Such solutions are unstable and can rapidly recrystallize when a seed crystal is added or if the solution is physically disturbed, leading to the formation of crystals.
A saturated solution, on the other hand, contains the maximum amount of solute that can be dissolved at a particular temperature. While the addition of more solute to this kind of solution will not dissolve, the saturated solution typically does not produce crystals unless the conditions are changed. For example, cooling a hot saturated solution can create a supersaturated state that may then produce crystals.
In contrast, a concentrated solution simply means there is a relatively high amount of solute in the solvent, but not necessarily more than the solubility limit. A diluted solution has a comparatively low concentration of solute. Neither of these will produce crystals simply by being disturbed as they are not in a supersaturated state.
When a supersaturated solution is prepared, usually by dissolving more solute at a higher temperature and then cooling, it becomes susceptible to precipitation. Once disturbed, the excess solute can come out of the solution in the form of crystals.