JEE Main 2024 — Aldehydes and Ketones Question with Solution
JEE Main 2024 (29 Jan Shift 2)
Question
Identify the reagents used for the following conversion
Choose an option
Show full solutionCorrect option: D
Step-by-step explanation
Diisobutylaluminum hydride (DIBAL-H) is an organoaluminum reagent typically used for the reduction esters or nitriles to aldehydes.
In the second step intramolecular aldol condensation reaction takes place. Cyclization occurs if the α carbon atom and the second carbonyl carbon atom can bond to form a five- or six-membered ring.
The Clemmensen reduction is a reaction that is used to reduce aldehydes or ketones to alkanes using hydrochloric acid and zinc amalgam. In the same condition, alcohol converts to alkenes.
Practice this on the real CBT interface
Solve this JEE Main question (and the rest of the Aldehydes and Ketones chapter) on PrepSharp's TCS iON-style CBT player — with timer, bookmarks and session analytics.
Solve interactively →About this question
This is a previous-year question from JEE Main 2024, 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.