NEET Exam  >  NEET Questions  >  Which of the following does not undergo benzo... Start Learning for Free
Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde?
Verified Answer
Which of the following does not undergo benzoin condensation ? (1) Ben...
The answer is 3.
 

This question is part of UPSC exam. View all NEET courses
Most Upvoted Answer
Which of the following does not undergo benzoin condensation ? (1) Ben...
Introduction:
Benzoin condensation is a type of organic reaction in which two molecules of aldehyde condense to form a benzoin compound. This reaction is catalyzed by cyanide ions and typically occurs under basic conditions. In this process, the carbonyl group of one aldehyde acts as a nucleophile and attacks the carbonyl group of another aldehyde, resulting in the formation of a carbon-carbon bond.

Explanation:
Among the given options, all compounds except for (1) Benzene carbaldehyde can undergo benzoin condensation. Let's discuss each compound in detail:

1. Benzene carbaldehyde:
- Benzene carbaldehyde, also known as benzaldehyde, does not have an α-hydrogen atom necessary for benzoin condensation.
- In this reaction, the α-hydrogen atom of the aldehyde acts as a nucleophile and attacks the carbonyl group of another aldehyde.
- However, in benzaldehyde, the α-position is occupied by a benzene ring, which does not have an α-hydrogen atom.
- Therefore, benzene carbaldehyde cannot undergo benzoin condensation.

2. p-toluene carbaldehyde:
- p-toluene carbaldehyde, also known as p-tolualdehyde, contains an α-hydrogen atom necessary for benzoin condensation.
- It can undergo benzoin condensation as the α-hydrogen atom can act as a nucleophile and attack the carbonyl group of another aldehyde.

3. Phenylethanal:
- Phenylethanal, also known as phenylacetaldehyde, contains an α-hydrogen atom necessary for benzoin condensation.
- It can undergo benzoin condensation as the α-hydrogen atom can act as a nucleophile and attack the carbonyl group of another aldehyde.

4. 4-methoxybenzaldehyde:
- 4-methoxybenzaldehyde contains an α-hydrogen atom necessary for benzoin condensation.
- It can undergo benzoin condensation as the α-hydrogen atom can act as a nucleophile and attack the carbonyl group of another aldehyde.

Summary:
In summary, among the given options, benzene carbaldehyde (benzaldehyde) does not undergo benzoin condensation as it lacks an α-hydrogen atom necessary for the reaction. The other compounds, namely p-toluene carbaldehyde, phenylethanal, and 4-methoxybenzaldehyde, can undergo benzoin condensation as they possess the required α-hydrogen atom.
Community Answer
Which of the following does not undergo benzoin condensation ? (1) Ben...
I agree with you its c
Attention NEET Students!
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.
Explore Courses for NEET exam

Top Courses for NEET

Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde?
Question Description
Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde?.
Solutions for Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? in English & in Hindi are available as part of our courses for NEET. Download more important topics, notes, lectures and mock test series for NEET Exam by signing up for free.
Here you can find the meaning of Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? defined & explained in the simplest way possible. Besides giving the explanation of Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde?, a detailed solution for Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? has been provided alongside types of Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? theory, EduRev gives you an ample number of questions to practice Which of the following does not undergo benzoin condensation ? (1) Benzene carbaldehyde (2) p-toluene carbaldehyde (3) phenylethanal (4) 4-methoxybenzaldehyde? tests, examples and also practice NEET tests.
Explore Courses for NEET exam

Top Courses for NEET

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev