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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsEasy

Question

Ethyl benzoate can be prepared from benzoic acid by using:

A

Propyl alcohol

B

Ethyl alcohol and dry HCl

C

Ethyl chloride

D

Sodium ethoxide

Step-by-Step Solution

Ethyl benzoate (C6H5COOC2H5C_6H_5COOC_2H_5) is an ester formed by the reaction of benzoic acid (C6H5COOHC_6H_5COOH) with ethyl alcohol (C2H5OHC_2H_5OH). This reaction is a classic example of Fischer Esterification, which requires an acid catalyst to proceed.

The reaction is reversible and is catalyzed by acids like concentrated H2SO4H_2SO_4 or dry HCl gas. The acid protonates the carbonyl oxygen of the carboxylic acid, making it more susceptible to nucleophilic attack by the alcohol molecule. Dry HCl also helps in shifting the equilibrium to the right by absorbing the water produced (acting as a dehydrating agent).

C6H5COOH+C2H5OH→dry HClC6H5COOC2H5+H2OC_6H_5COOH + C_2H_5OH \xrightarrow{\text{dry HCl}} C_6H_5COOC_2H_5 + H_2O

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidsbenzoatepreparedbenzoic

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