JEE Main 2023ChemistryHydrocarbonsHardMCQ

JEE Main 2023 — Hydrocarbons Question with Solution

JEE Main 2023 (11 Apr Shift 2)

Question

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: can be subjected to Wolff-Kishner reduction to give 
Reason R: Wolff-Kishner reduction is used to convert  into 
In the light of the above statements, choose the correct answer from the options given below:

Choose an option

Show full solutionCorrect option: B
Correct answer
BA is false but R is true

Step-by-step explanation

The reagent hydrazine in alkaline medium is used in the Wolff-Kishner reduction reaction. In this reaction aldehydes and ketone converts to respective alkanes.

This reaction is not good for base sensitive groups in the carbonyl compounds.  The following chloro carbonyl compound give alkene as elimination reaction expected in basic medium.

 

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About this question

This is a previous-year question from JEE Main 2023, covering the Hydrocarbons 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.