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Q. No.The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon is:
1.
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.
2.
A carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.
3.
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.
4.
A carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.
Subtopic: Aldehydes & Ketones: Preparation & Properties |
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A reagent that can distinguish cis-cyclopenta-1,2-diol from the trans-isomer is:
1. Ozone
2. MnO2
3. Aluminium isopropoxide
4. Acetone
Subtopic: Aldehydes & Ketones: Preparation & Properties |
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NEET - 2016
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The product formed by the reaction of an aldehyde with a primary amine is:
1. Ketone
2. Carboxylic acid
3. Aromatic acid
4. Schiff base
Subtopic: Aldehydes & Ketones: Preparation & Properties |
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NEET - 2016
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The reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by the elimination of water. The reagents are:
| 1. | A Grignard reagent. |
| 2. | Hydrazine in the presence of a feebly acidic solution. |
| 3. | Hydrocyanic acid. |
| 4. | Sodium hydrogen sulphite. |
Subtopic: Isomers & Reaction Mechanism |
60%
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NEET - 2015
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Compounds that can exhibit tautomerism, are:
1. l and ll
2. l and lll
3. ll and lll
4. l, ll and lll
Subtopic: Isomers & Reaction Mechanism |
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NEET - 2015
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Subtopic: Isomers & Reaction Mechanism |
83%
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AIPMT - 2014
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What is the order of the stability of the following tautomeric compounds?
1. III > II > I
2. II > I > III
3. II > III > I
4. I > II > III
2. II > I > III
3. II > III > I
4. I > II > III
Subtopic: Isomers & Reaction Mechanism |
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AIPMT - 2013
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Subtopic: Name Reaction |
82%
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AIPMT - 2013
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Subtopic: Isomers & Reaction Mechanism |
65%
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AIPMT - 2012
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Acetone is treated with excess ethanol in the presence of hydrochloric acid.
The product obtained will be:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Isomers & Reaction Mechanism |
72%
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AIPMT - 2012
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