JEE Main 2022 — Aldehydes and Ketones Question with Solution
JEE Main 2022 (29 Jun Shift 2)
Question
In the given reaction,
The number of electrons present in the product is ____________.
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Show full solutionCorrect answer: 4
Correct answer
4
Step-by-step explanation
In an aldol condensation, an enolate ion reacts with a carbonyl compound in the presence of acid/base catalyst to form a β-hydroxy aldehyde or β-hydroxy ketone, followed by dehydration to give a conjugated enone. It is a useful carbon-carbon bond-forming reaction.
As there are 2 pi bonds in the major product(P), the number of pi electrons will be equal to 4.
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This is a previous-year question from JEE Main 2022, covering the Aldehydes and Ketones chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.