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Revisiting Tautomerism

What statemen...

Question

What statement is correct for keto-enol tautomerism?

A

Tautomerism can be catalysed by acid and base both.

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B

Tautomers are present in dynamic equilibrium state.

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C

Generally keto form is more stable than enol form in simple ketone.

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D

All of the above

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Solution

The correct option is D All of the above

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Similar questions

In which one of the following keto-enol system is the keto form more stable than the enol form?

Q. The conversion of a keto form into enol is enolisation. It depends on structural factor, temperature and nature of solvent. Resonance and hydrogen bonding increases enol content. Enolic form of phenol is more stable than keto form by -13 kcal/mole of energy hence phenol exist exclusively as an enol. Enolic tautomer is less polar due to intramolecular hydrogen bonds than the corresponding keto form. Any polar solvent would decrease the enolisation and favour keto form intramolecular hydrogen bonding stablized enol form by 7kcal/mole and resonance stabilizes enol form by 15 kcal/mole.
The enol content of ethyl acetoacetate is maximum in :

Number of compounds given above where keto form is more dominationg than enol form in benzene solvent, is:

Q. In which of the following compounds, keto form is more dominating than enol form?

The number of compound(s) in which keto form is more dominating than enol form is/are:

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Revisiting Tautomerism

Standard XII Chemistry

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