Class 12 Exam > Class 12 Questions > Which can be deduced correctly regarding keto...
Start Learning for Free
Which can be deduced correctly regarding keto-enol tautomerism in general?
- a)Increasing temperature increases the enol content at equilibrium
- b)Mono-enols are usually more stable than dienols
- c)Enols of ketones are generally more stable than enols of aliphatic aldehydes
- d)Keto-enol taytomerism is catalysed by both acidic and basic catalys
Correct answer is option 'A,B,C,D'. Can you explain this answer?
Verified Answer
Which can be deduced correctly regarding keto-enol tautomerism in gene...
Increasing temperature increases equilibrium content of less stable enol tautomers.
Enolisation decreases stability, hence introducing two or more enol groups are further more difficult.
Enols of ketones are more substituted at double bond, hence more stable.
Both acid and base catalyses keto-enol tautomerism.
Enolisation decreases stability, hence introducing two or more enol groups are further more difficult.
Enols of ketones are more substituted at double bond, hence more stable.
Both acid and base catalyses keto-enol tautomerism.
Most Upvoted Answer
Which can be deduced correctly regarding keto-enol tautomerism in gene...
Keto-enol tautomerism:
Keto-enol tautomerism is a chemical phenomenon in which a compound exists in equilibrium between its keto form and enol form. The keto form refers to a carbonyl compound, typically a ketone or aldehyde, while the enol form contains a carbon-carbon double bond and a hydroxyl group.
Understanding the options:
a) Increasing temperature increases the enol content at equilibrium:
As per Le Chatelier's principle, increasing the temperature of a reaction at equilibrium favors the endothermic reaction. In the case of keto-enol tautomerism, the conversion of the keto form to the enol form is endothermic. Therefore, increasing the temperature will shift the equilibrium towards the enol form, resulting in an increase in the enol content.
b) Mono-enols are usually more stable than dienols:
Mono-enols have a single carbon-carbon double bond, while dienols have two double bonds. The presence of multiple double bonds in dienols increases the strain and instability of the molecule. Consequently, mono-enols are generally more stable than dienols.
c) Enols of ketones are generally more stable than enols of aliphatic aldehydes:
Ketones have two alkyl groups attached to the carbonyl carbon, while aliphatic aldehydes have one alkyl group and one hydrogen atom. The presence of two alkyl groups in ketones provides greater electron-donating resonance effects, which stabilize the enol form. In contrast, the absence of an additional alkyl group in aliphatic aldehydes limits the stabilization of the enol form. Therefore, enols of ketones are generally more stable than enols of aliphatic aldehydes.
d) Keto-enol tautomerism is catalyzed by both acidic and basic catalysts:
The interconversion between the keto and enol forms can be catalyzed by both acidic and basic conditions. Acidic conditions involve protonation of the carbonyl oxygen, leading to the formation of an enol intermediate. Basic conditions involve deprotonation of the alpha carbon, resulting in the formation of an enolate intermediate. Both acidic and basic catalysts can facilitate the keto-enol tautomerism by providing a favorable reaction pathway with lower activation energy.
In summary:
- Increasing temperature favors the formation of the enol form at equilibrium.
- Mono-enols are generally more stable than dienols due to the increased strain in dienols.
- Enols of ketones are more stable than enols of aliphatic aldehydes due to the presence of two alkyl groups in ketones.
- Keto-enol tautomerism can be catalyzed by both acidic and basic catalysts.
Keto-enol tautomerism is a chemical phenomenon in which a compound exists in equilibrium between its keto form and enol form. The keto form refers to a carbonyl compound, typically a ketone or aldehyde, while the enol form contains a carbon-carbon double bond and a hydroxyl group.
Understanding the options:
a) Increasing temperature increases the enol content at equilibrium:
As per Le Chatelier's principle, increasing the temperature of a reaction at equilibrium favors the endothermic reaction. In the case of keto-enol tautomerism, the conversion of the keto form to the enol form is endothermic. Therefore, increasing the temperature will shift the equilibrium towards the enol form, resulting in an increase in the enol content.
b) Mono-enols are usually more stable than dienols:
Mono-enols have a single carbon-carbon double bond, while dienols have two double bonds. The presence of multiple double bonds in dienols increases the strain and instability of the molecule. Consequently, mono-enols are generally more stable than dienols.
c) Enols of ketones are generally more stable than enols of aliphatic aldehydes:
Ketones have two alkyl groups attached to the carbonyl carbon, while aliphatic aldehydes have one alkyl group and one hydrogen atom. The presence of two alkyl groups in ketones provides greater electron-donating resonance effects, which stabilize the enol form. In contrast, the absence of an additional alkyl group in aliphatic aldehydes limits the stabilization of the enol form. Therefore, enols of ketones are generally more stable than enols of aliphatic aldehydes.
d) Keto-enol tautomerism is catalyzed by both acidic and basic catalysts:
The interconversion between the keto and enol forms can be catalyzed by both acidic and basic conditions. Acidic conditions involve protonation of the carbonyl oxygen, leading to the formation of an enol intermediate. Basic conditions involve deprotonation of the alpha carbon, resulting in the formation of an enolate intermediate. Both acidic and basic catalysts can facilitate the keto-enol tautomerism by providing a favorable reaction pathway with lower activation energy.
In summary:
- Increasing temperature favors the formation of the enol form at equilibrium.
- Mono-enols are generally more stable than dienols due to the increased strain in dienols.
- Enols of ketones are more stable than enols of aliphatic aldehydes due to the presence of two alkyl groups in ketones.
- Keto-enol tautomerism can be catalyzed by both acidic and basic catalysts.
|
Explore Courses for Class 12 exam
|
|
Similar Class 12 Doubts
Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer?
Question Description
Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer?.
Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? for Class 12 2025 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? covers all topics & solutions for Class 12 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer?.
Solutions for Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer?, a detailed solution for Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? has been provided alongside types of Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Which can be deduced correctly regarding keto-enol tautomerism in general?a)Increasing temperature increases the enol content at equilibriumb)Mono-enols are usually more stable than dienolsc)Enols of ketones are generally more stable than enols of aliphatic aldehydesd)Keto-enol taytomerism is catalysed by both acidic and basic catalysCorrect answer is option 'A,B,C,D'. Can you explain this answer? tests, examples and also practice Class 12 tests.
|
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup