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Q. No.An organic compound C5H10O forms phenyl hydrazone that gives a positive iodoform test and undergoes Wolff Kishner reaction to give isopentane. The IUPAC name of the organic compound is:
1. Pentanol
2. Pentan-2-one
3. Pentan-3-one
4. 3-Methylbutan-2-one
1. Pentanol
2. Pentan-2-one
3. Pentan-3-one
4. 3-Methylbutan-2-one
Subtopic: Aldehydes & Ketones: Preparation & Properties | Name Reaction |
62%
Level 2: 60%+
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Consider the following reaction:
Bromobenzene \(\xrightarrow[dry \ ether]{Mg}\) A \(\xrightarrow[ii. \ H_{3}O^{+}]{i. \ CO_{2}}\) B
The name of compound B is:
Bromobenzene \(\xrightarrow[dry \ ether]{Mg}\) A \(\xrightarrow[ii. \ H_{3}O^{+}]{i. \ CO_{2}}\) B
The name of compound B is:
| 1. | Phenol | 2. | Benzaldehyde |
| 3. | Benzoic acid | 4. | None of these |
Subtopic: Carboxylic Acids: Preparation & Properties |
84%
Level 1: 80%+
Hints
The carboxylic acid among the following that can give the Hell Volhard Zelinsky (HVZ) reaction is:
1. HCOOH
2. 2,2-Dimethyl propanoic acid
3. Benzoic acid
4. Propanoic acid
1. HCOOH
2. 2,2-Dimethyl propanoic acid
3. Benzoic acid
4. Propanoic acid
Subtopic: Name Reaction |
80%
Level 1: 80%+
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Please attempt this question first.
Given below are two statements:
In the light of the above statements, choose the most appropriate answer from the options given below:
| Statement I | The boiling points of aldehydes and ketones are higher than hydrocarbons of comparable molecular masses because of weak molecular association in aldehydes and ketones due to dipole-dipole interactions. |
| Statement II | The boiling points of aldehydes and ketones are lower than the alcohols of similar molecular masses due to the absence of H-bonding. |
| 1. | Statement I is incorrect but Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct but Statement II is incorrect. |
Subtopic: Aldehydes & Ketones: Preparation & Properties |
65%
Level 2: 60%+
NEET - 2022
Hints
Match List-I with List-II.
Choose the correct answer from the options given below:
| List-I (Products formed) |
List - II (Reaction of carbonyl compound with) |
||
| (A) | Cyanohydrin | (I) | NH₂OH |
| (B) | Acetal | (II) | RNH₂ |
| (C) | Schiff's base | (III) | Alcohol |
| (D) | Oxime | (IV) | HCN |
| (A) | (B) | (C) | (D) | |
| 1. | (IV) | (III) | (II) | (I) |
| 2. | (III) | (IV) | (II) | (I) |
| 3. | (II) | (III) | (IV) | (I) |
| 4. | (I) | (III) | (II) | (IV) |
Subtopic: Name Reaction |
89%
Level 1: 80%+
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
Hints
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
Hints
Subtopic: Name Reaction |
64%
Level 2: 60%+
NEET - 2021
Hints
Consider the below reaction and identify the missing reagent/chemical.
\(\mathrm{CH_{3}CH_{2}COO^{-}Na^{+} \ \xrightarrow[\textbf{Heat}]{\textbf{NaOH, + ? }} \ CH_{3}CH_{3} \ + \ Na_{2}CO_{3}}\)
1. CaO
2. DIBAL-H
3. B2H6
4. Red Phosphorus
Subtopic: Carboxylic Acids: Preparation & Properties |
78%
Level 2: 60%+
NEET - 2021
Hints
Subtopic: Aldehydes & Ketones: Preparation & Properties | Carboxylic Acids: Preparation & Properties | Name Reaction |
64%
Level 2: 60%+
NEET - 2022
Hints
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