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NEET levelSingle correct optionDifficulty 1 of 3o1172

The esterification $CH X_{3} COOH + C X_{2} H X_{5} OH CH X_{3} COOC X_{2} H X_{5} + H X_{2} O$ is reversible. Which condition drives it towards the ester?

Aexcess water with dilute $H X_{2} SO X_{4}$
Bexcess ethanol with conc. $H X_{2} SO X_{4}$ , removing water as it forms
Cremoving ethanol as it forms
Dadding excess NaOH

Answer: B

By Le Chatelier's principle, excess of a reactant or removal of a product shifts the equilibrium to the right. Conc.

H X_{2} SO X_{4}

catalyses and also takes up water, so excess ethanol with water removal gives the ester.

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