JEE Main 2022 — Aldehydes and Ketones Question with Solution
JEE Main 2022 (29 Jul Shift 2)
Question
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Show full solutionCorrect answer: 3
Step-by-step explanation
Aldehydes and ketones undergo reaction with HCN to produce cyanohydrins. The reaction progresses very slowly by using pure hydrogen cyanide. Hence, base as a catalyst helps to speed up the reaction. This is an example of nucleophilic addition reaction.
here we are given racemic mixture of optically active compound. The attacking nucleophile can attack on carbonyl carbon from either side forming a new chiral carbon. So, in product there will be two chiral carbon but it is symmetrical. So, number of stereoisomers will be 3 only.
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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.