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  4. During the reaction between carbonyl compounds with ammonia derivatives, a proper pH is required. Select the correct reasons.

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Q. During the reaction between carbonyl compounds with ammonia derivatives, a proper $pH$ is required. Select the correct reasons.

Aldehydes Ketones and Carboxylic Acids

Solution:

Correct answer is (a) To increase positive charge on the $C$ atom of $(C=O)$ group for the better attack of nucleophilic centre of ammonia derivative, a small amount of acid is needed.Correct answer is (c) With excess of acid, ammonia derivatives form their salts and cannot act as nucleophiles.Correct answer is (d) The proper pH required for these reactions is nearly $3.5$.