Question

Trans-esterification is a reaction between

• A. two ester molecules
• B. alcohol and carboxylic acid
• C. alcohol and ether
• D. alcohol and ester.

Hint:

Trans-esterification is widely used in the production of biodiesel, where triglycerides react with methanol or ethanol to form esters.

Answer 1

The Correct Option is D

Step 1: Understanding Trans-esterification
Trans-esterification is the process in which an ester reacts with an alcohol to form a new ester and a different alcohol.
It is a reaction between an alcohol and an ester, usually in the presence of a catalyst. 

Step 2: Explanation of Other Options 
Option (a) is incorrect because trans-esterification does not involve two ester molecules.
Option (b) is incorrect because trans-esterification does not involve carboxylic acid directly.
Option (c) is incorrect because the reaction does not involve ether.

Step 3: Conclusion 
Thus, trans-esterification is a reaction between an alcohol and an ester.