Answer :
The answer is (3) esterification. Note that deposition, distillation and sublimation are not chemical changes, they are physical changes, so you can solve this question by elimination if you know that. Regarding sterification it is a well known chemical reaction that consists on the formation of esters from carboxilic acids.
Answer:
(3) esterification
Explanation:
1) Deposition is a process in which a vapor directly condenses into a solid. It is the reverse of sublimation and therefore a process which involves a physical/phase change.
2) Distillation is a process in which a liquid mixture is separated based on the differences in their boiling points. This is a physical separation and not any form of a chemical change.
3) Esterification is an organic reaction in which a carboxylic acid is treated with an alcohol to form an ester.
4) Sublimation is again a physical/phase change process in which a solid gets converted into a gas.
