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Question 810013
JEE Chemistry · Medium

Isomerism: Mixed MCQ

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MixedMediumQuestion 810013

Question

Which of the following pairs are tautomers?
  1. A
    Keto and enol forms of a compound
    Correct
  2. B
    Cis and trans isomers
  3. C
    R and S enantiomers
  4. D
    Chain isomers

Correct answer

Keto and enol forms of a compound

Explanation

Tautomers interconvert rapidly through H-atom transfer. Keto-enol tautomerism is most common: −CH₂−C=O ⇌ −CH=C−OH. Acetaldehyde (keto) ⇌ vinyl alcohol (enol).

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