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JEE Advanced2010ChemistryAlcohols Phenols and EthersActual

Paragraph: Two aliphatic aldehydes P and Q react in the presence of aqueous K ₂ CO ₃ to give compound R, which upon treatment with HCN provides compound S . On acidification and heating, S gives the product shown below : Question: The compound S is

Correct answer

3

Step-by-step solution

Some inferences from above data - a q ~K ₂ CO ₃ can facilitate aldol condensation to aliphatic aldehydes. - HCN can lead to cyanohydrin formation - H ⁺, can lead to hydrolysis of cyanide to acid and following esterification. So S is cyanohydrin. Carbonyl compounds (Aldol condensation) Conceptual reaction and mechanistic understanding IV

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