Keto–enol tautomerism

2016 1 question

1. 1 Aldehydes, Ketones and Carboxylic Acids
   The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is
   A a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration. B a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation. C a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism. D a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.
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