Medicneet Logo
NEET 2016 Phase 1 · ChemistrySelf-aldolPrevious Year Question

The correct statement regarding a carbonyl compound with a hydrogen atom on its -carbon is:

Answer: (D) (D) A carbonyl compound with a hydrogen atom on its -carbon rapidly equilibrates with its corresponding enol, and this process is known as keto-enol tautomerism.. \textbf{Answer:} (D) The carbonyl rapidly equilibrates with its enol, a process called keto-enol tautomerism.

  1. A.(A) A carbonyl compound with a hydrogen atom on its -carbon never equilibrates with its corresponding enol.
  2. B.(B) A carbonyl compound with a hydrogen atom on its -carbon rapidly equilibrates with its corresponding enol, and this process is known as aldehyde-ketone equilibration.
  3. C.(C) A carbonyl compound with a hydrogen atom on its -carbon rapidly equilibrates with its corresponding enol, and this process is known as carbonylation.
  4. D.(D) A carbonyl compound with a hydrogen atom on its -carbon rapidly equilibrates with its corresponding enol, and this process is known as keto-enol tautomerism.✓

Correct Answer

(D) (D) A carbonyl compound with a hydrogen atom on its -carbon rapidly equilibrates with its corresponding enol, and this process is known as keto-enol tautomerism.

Solution & Explanation

\textbf{Answer:} (D) The carbonyl rapidly equilibrates with its enol, a process called keto-enol tautomerism. \textbf{Solution:} A carbonyl compound bearing an -hydrogen exists in equilibrium with its enol form, in which the -H migrates to the carbonyl oxygen giving a unit. This rapid proton-shift interconversion between the keto and enol forms is keto-enol tautomerism.

🎯
43,000+ questions in हिंदी & English · one-tap toggle
Practice NEET 2016 Phase 1 Chemistry — free, with instant solutions
43,000+ NEET questions solved step-by-step, chapter-wise, in the MedicNEET app.
📚Practice all NEET Chemistry PYQs chapter-wise →💡Don't get it? Learn the Aldehydes, Ketones And Carboxylic Acid concepts →
← Chemistry Q16Chemistry Q18 →

More NEET PYQ solutions

ChemConsider the reaction: CH3COCH3 ->[dil. Ba(OH)2] X The functional groups present in compound X areChemWhich one of the following is not formed when acetone (CH3COCH3) reacts with 2-pentanone (CH3COCH2CH2CH3) in the presence of dilute NaOH followed by heating?ChemThe reaction between benzaldehyde and acetophenone in the presence of dilute NaOH is known as:ChemWhich of the following is the product formed when cyclohexanone undergoes aldol condensation followed by heating?ChemWhich among the following molecules (I, II, III) can exhibit tautomerism?ChemThe correct order of decreasing acidity of the following aliphatic acids is:ChemWhich one of the following reactions does NOT belong to Lassaigne's test?ChemHow many products (including stereoisomers) are expected from the monochlorination of 2-methylbutane, (CH3)2CH-CH2-CH3?
More: All NEET 2016 Phase 1 Chemistry PYQs · NEET Chemistry PYQs · All NEET PYQs · Previous year papers