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Which of the following is used as catalyst for the esterification of carboxylic acid and alcohol?

Which of the following is used as catalyst for the esterification of carboxylic acid and alcohol? Correct Answer Sulphuric acid

The classic synthesis is the Fischer esterification, which involves treating a carboxylic acid with an alcohol in the presence of a dehydrating agent: RCO2H + R′OH ⇌ RCO2R′ + H2O The equilibrium constant for such reactions is about 5 for typical esters, e.g., ethyl acetate. The reaction is slow in the absence of a catalyst. Sulfuric acid is a typical catalyst for this reaction.

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Esterification of the acid P with the alcohol Q will give
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