What will happen to a supersaturated solution if the supersaturated solution undergoes a physical shock?

A supersaturated solution that undergoes a physical shock can result in the crystallizing of the solute in the solution.

Explanation:

A solution is made up of a solute dissolved in a solvent. A supersaturated solution is one in which the solvent holds more of the solute that it can hold in a normal condition.  Supersaturation is an unstable state than easily reverse itself. At supersaturation, the maximum ability of the solvent to dissolve and hold the solute is stretched to its maximum limit. Physical shock to such a system in any any form possible will result in the crystallization of the solute within the solution. Physical shock can be in the form of a reduced temperature, a reduction in the volume of the solvent by evaporation, a decrease in the pressure of the system and even a mild vibration.  

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)