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NEET CHEMISTRYAldehydes, Ketones and Carboxylic AcidsMedium

Question

Compounds that can exhibit tautomerism are:

A

I and II

B

I and III

C

II and III

D

I, II and III

Step-by-Step Solution

For a carbonyl compound (aldehyde or ketone) to exhibit keto-enol tautomerism, it must possess at least one acidic α\alpha-hydrogen atom attached to an sp3sp^3 hybridised carbon adjacent to the carbonyl group (>C=O>C=O).

The acidity of α\alpha-hydrogens is due to the strong electron-withdrawing effect of the carbonyl group and the resonance stabilisation of the conjugate base (enolate ion). If compounds I, II, and III all contain oxidizable α\alpha-hydrogens, they will all exhibit tautomerism.

Exam Context & Concepts Covered

This question aligns with the NEET CHEMISTRY syllabus, specifically targeting concepts from Aldehydes, Ketones and Carboxylic Acids. Mastering this topic is crucial for scoring well in the upcoming medical entrance examinations. Solving conceptually related problems will help you understand the nuances of these concepts and improve your problem-solving speed.

CHEMISTRYAldehydes, Ketones and Carboxylic Acidscompoundsexhibittautomerism

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