JEE Main 2020 — Aldehydes and Ketones Question with Solution
JEE Main 2020 (02 Sep Shift 2)
Question
Two compounds and with same molecular formula undergo Grignard reaction with methylmagnesium bromide to give products and . Products and show following chemical tests.
| Test | C | D |
| Ceric ammonium nitrate Test | Positive | Positive |
| Lucas Test | Turbidity obtained after five minutes | Turbidity obtained Immediately |
| Iodoform Test | Positive | Negative |
and respectively are
Choose an option
Show full solutionCorrect option: A
Step-by-step explanation
B will be ketone as it gives tertiary alcohol after reaction with grignard while A will be aldehyde which produces secondary alcohol after reaction with grignard reagent.
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This is a previous-year question from JEE Main 2020, 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.