JEE Main 2023ChemistryAlcohols Phenols And EthersProperties Preparation And Uses Of PhenolseasyMCQ

JEE Main 2023 — Alcohols Phenols And Ethers Question with Solution

From: JEE Main 2023 (Online) 25th January Morning Shift

Question

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R :

Assertion A : Acetal / Ketal is stable in basic medium.

Reason R : The high leaving tendency of alkoxide ion gives the stability to acetal/ketal in basic medium.

In the light of the above statements, choose the correct answer from the options given below :

Choose an option

Show full solutionCorrect option: D
Correct answer
DA is true but R is false.

Step-by-step explanation

For Assertion: Acetal and ketals are basically ethers hence they must be stable in basic medium but should break down in acidic medium. Hence assertion is correct.

For reason: Alkoxide ion (RO–) is not considered a good leaving group hence reason must be false.

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About this question

This is a previous-year question from JEE Main 2023, covering the Alcohols Phenols And Ethers 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.