Aldehydes, Ketones and Carboxylic Acids Class 12th Chemistry Ncert Solutions Chemistry Class 12th

Assertion A : Enol form of acetone [CH3COCH3] exists in <0.1% quantity. However, the enol

form of acetyl acetone [CH3COCH2OCCH3] exists in approximately 15% quantity.

Reason R : Enol form of acetylacetone is stabilized by intramolecular hydrogen bonding, which is

not possible in enol form of acetone.

Choose the correct statement:

Option 1 - <p><span lang="EN-IN">Both <strong>A </strong>and <strong>R </strong>are true and <strong>R </strong>is the correct explanation of <strong>A</strong></span></p>

Option 2 - <p><strong><span lang="EN-IN">A </span></strong><span lang="EN-IN">is true but <strong>R </strong>is false</span></p>

Option 3 - <p><span lang="EN-IN">) <strong>A </strong>is false but <strong>R </strong>is true</span></p>

Option 4 - <p><span lang="EN-IN">Both <strong>A </strong>and <strong>R </strong>are true but <strong>R </strong>is not the correct explanation of <strong>A</strong></span></p> <p><strong><span lang="EN-IN"> </span></strong></p>

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Answered by

Raj Pandey | Contributor-Level 9

5 months ago

Correct Option - 4

Detailed Solution:

The enol form of acetone exists in less than 0.1% quantity, since its keto form is highly stable. But in the case of acetylacetone, the enol form is stabilized by intramolecular H-bonding, so its quantity increases to approximately 15%.
The intramolecular H-bond in the enol form of acetylacetone is s

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Chemistry Ncert Solutions Class 12th 2023

Chemistry Ncert Solutions Class 12th 2023

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