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Q. No.Given below are two statements:
Statement I:
Aldehydes and ketones having at least one \(\alpha\)-hydrogen undergo aldol condensation in the presence of dilute alkali as catalyst.
Statement II:
When aldol condensation is carried out between two different aldehydes, it is called cross aldol condensation. Ketones do not give this reaction.
In light of the above statements, choose the most appropriate answer from the options given below:
1.
Statement I is correct and Statement II is incorrect.
2.
Statement I is incorrect and Statement II is correct.
3.
Both Statement I and Statement II are correct.
4.
Both Statement I and Statement II are incorrect.
Subtopic: Name Reaction |
72%
Level 2: 60%+
NEET - 2022
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The correct IUPAC name of the following compound is:
| 1. | 2-Ethylhex-3-en-4-one | 2. | 4-Methylhex-3-en-2-one |
| 3. | 4-Ethylpent-3-en-2-one | 4. | 3-Methylhex -3-en-4-one |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
87%
Level 1: 80%+
NEET - 2022
Hints
The product(s) formed from the following reaction is/are:
| 1. | RCOOH only | 2. | RCH2COOH only |
| 3. |  |
4. | RCOOH and RCH2COOH |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
68%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties | Name Reaction |
64%
Level 2: 60%+
NEET - 2022
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Subtopic: Acid Derivatives - Preparation, Properties & Uses |
54%
Level 3: 35%-60%
NEET - 2022
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Which of the following reactions is not an example of nucleophilic addition–elimination reaction?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Isomers & Reaction Mechanism |
71%
Level 2: 60%+
NEET - 2022
Hints
Subtopic: Name Reaction |
76%
Level 2: 60%+
NEET - 2022
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Subtopic: Carboxylic Acids: Preparation & Properties | Acid Derivatives - Preparation, Properties & Uses |
61%
Level 2: 60%+
NEET - 2022
Hints
Which one of the following is not formed when acetone reacts with 2-pentanone in the presence of dilute NaOH followed by heating?
| 1. |  |
| 2. |  |
| 3. |  |
| 4. |  |
Subtopic: Name Reaction |
54%
Level 3: 35%-60%
NEET - 2022
Hints
\(\mathrm{RMgX}+\mathrm{CO}_{2} \underset{\bf\text { ether }}{\stackrel{\bf\text { dry }}{\longrightarrow}} \mathrm{Y} \xrightarrow{{\mathrm{H}_{3} \mathrm{O}^{+}}}RCOOH\)
What is Y in the above reaction?
1. (RCOO)2Mg
2. RCOO-Mg+X
3. R3CO-Mg+X
4. RCOO-X+
What is Y in the above reaction?
1. (RCOO)2Mg
2. RCOO-Mg+X
3. R3CO-Mg+X
4. RCOO-X+
Subtopic: Carboxylic Acids: Preparation & Properties |
87%
Level 1: 80%+
NEET - 2022
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