True and False
A. Crystallization can occur only in a saturated solution
B. Heat is evolved in endothermic changes

Dear student,

1.Crystallization is the formation of crystals when  supersaturated solution is cooled down..
These solutions are formed when ee change the condition of a saturated solution like temperature or pressure. For many of the chemical substances, the solubility is increased as we increase the  temperature. So, at a higher temperature, a solvent will dissolve more solute than it is capable of and hence the solution will become super-saturated.. So this statement is False.

2. Heat is evolved in exothermic reaction while it is absorbed in endothermic reactions. So this State is false 


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