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  4. Assertion: Esters which contain a-hydrogens undergo Claisen condensation. Reason: LiAlH4 reduction of esters gives acids.

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Q. Assertion: Esters which contain a-hydrogens undergo Claisen condensation.
Reason: $LiAlH_4$ reduction of esters gives acids.

AIIMSAIIMS 2009Aldehydes Ketones and Carboxylic Acids

Solution:

It is known that esters with $\alpha$ -hydrogens form carbanion when treated with base. It brings about nucleophilic substitution at the carbonyl group of the other molecule of the ester to yield $\beta$-keto ester. $LiAlH _{4}$ reduces esters to alcohols.