Name Reaction Question and Answer for CSIR NET GATE IIT-JAM
Name Reaction-1: Question with Solution
The reaction is named after the scientist who first discovered the reaction. Chemists discover new organic compounds using different types of Organic synthesis or rearrangement.
Today we will discuss Name reactions to a few questions solved for CSIR NET GATE IIT-JAM TIFR BARC and other equivalent entrance examinations. Name reaction part is the most important and learning part of the chemistry subject. A chemistry student must read the mechanism and Rearrangement of the name reaction. These reactions are different types of chemical rearrangement such as
- Pinacol-Pinacolone Rearrangement
- Semipinacol-Pinacolone Rearrangement
- Baeyer-Villiger Oxidation
- Dienone-Phenol Rearrangement
- Beckmann Rearrangement
- Favorskii Rearrangement
- Bamford-Stevens Rearrangement
- Shapiro Reaction
- Appel Reaction
- Darzens Reaction
- Fries Rearrangement
- Staudinger Reaction
- Peterson Elimination
- Swern Oxidation Reaction
All are name reactions formed as a rearrangement reaction with a name. above all rearrangements are most famous and most important for a chemistry aspirant. Exam preparation on organic chemistry must follow those rearrangement reactions.
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How to question solve the Name Reaction part in the exam hole?
First of all, see the question given in the Question paper, and check the reagent of the reaction. If the reactant and reagent are similar to the above any rearrangement reaction. Then follow those steps which rearrangement reaction is similar to this Question. And simply apply those steps to the Question. That is very simple.
This trick works when you practice those name reaction Question solve regularly.
How to solve those name reaction Questions without any time waste?
We know that the maximum entrance examination question pattern is Multiple Choice Questions (MCQ) such as CSIR NET, GATE, IIT-JAM, etc., and a few exam question pattern objective types question.
Our suggestion that sees the question and read and then choose those questions which are most common. And those questions are solved as soon as possible without any time wasted then check other questions which tropical or complex questions for you.
Related Topics: Reagents and Reaction Mechanism Questions and Answer
Which Books are Best Name Reaction?
A textbook of Organic Chemistry by Clayden. It most common and most famous book in the world for a beginner to clear all most Name Reaction concepts. A chemistry student must be read. And another most popular and ground-level concept clearing book: Is organic Chemistry by I. L. Finar. For an M.Sc level student (Aspirant of CSIR NET, GATE, IIT JAM entrance exam) to discuss advanced levels, the question is directly through by Research article, the book: Modern Methods of Organic Synthesis by W. Carruthers and I. Coldham (Third edition).
Name Reaction Question Solution
All rearrangement reaction Questions for M.Sc. level students. Today we will briefly discuss a few questions and answer solutions for CSIR NET, GATE, IIT JAM, and other equivalent entrance examinations in organic chemistry. Name reaction part is the most conceptual rearrangement reaction. We will provide a PDF file in Name reaction Question with a solution.
Q.1. The major product A formed in the following reaction is
(A)
(B)
(C)
(D)
Answer: Option: (B)
Hints:
This reaction is a Dienone-Phenol Rearrangement reaction in case Ring expansion occurs. And formation or more stable carbocation. Acid H+ is used for catalysis and formation of Aromatic alcohol. Aromaticity acted as a driving force of this Dienone-Phenol Rearrangement.
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| Dienone-Phenol Rearrangement reaction follows those mechanism steps. |
Dienone tried with Acid medium (aq. HCl) formation of Phenol, this reaction is known as Dienone-Phenol reaction.
Q.2. The most suitable reagent for performing the following transformation is
(A)
(B)
(C)
(D)
Answer: Option: (C)
Hints:
This reaction is called Staudinger Reaction. It is a mild azide reduction using reagent PPh3 and water.
The mechanism of the Staudinger Reaction is following those steps:
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| Staudinger Reaction in the presence of PPh3. Reaction Mechanism. |
In case you can see that PPh3 has lone pair which is donated with azide Nitrogen and the formation of phosphorus cation. Azide anionic nitrogen attacked this Phosphorus cation and formed a three-member ring then released the Nitrogen gas (that is the driving force of this Staudinger Reaction). After releasing the P(OH)2Ph3 and formation of the final product amine.
Q.3. The major product of the following reaction is
Option:
(A)
(B)
(C)
(D)
Answer: Option: (B)
Hints:
This reaction is called Peterson Elimination. In presence of base (KH) formation of Cis alkene. The Reaction Mechanism of Peterson Elimination follows those steps:
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| Peterson Elimination reaction mechanism in presence of a base (KH). Formation of Cis alkene. |
Q.4. The major product formed in the following reaction is
(1)
(2)
(3)
(4)
Answer: Option: (3)
Hints:
Favorskii Rearrangement reaction in presence of Base (NaOMe) and solvent Et2O. And the formation of Ester of this reaction.
Reaction Mechanism:
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| Favorskii Rearrangement reaction in presence of Base (NaOMe) and solvent Et2O. |
Q.5. The major product formed in the following reaction is
(1)
(2)
(3)
(4)
Answer: Option: (4)
Hints:
In absents of Base (e.g.- Et3N) Swern Oxidation reaction forms a substitution product. The reagent Dimethyl sulfoxide (DMSO) reacts with Oxalyl Chloride (COCl)2 formation of (CH3)2(Cl)S+ electrophile and CO2 + CO gas and Cl-. Which CO2 and CO gas act as the driving force of this reaction. In the absence of a base follow this mechanism:
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| Swern Oxidation reaction mechanism. |
Name Reaction Questions and Answer download free pdf file
You can easy to download a free pdf file for the Name reaction QA full session including:
Conclusion:
Finally, the Name reaction Chapter is a vital part of organic synthesis. Those rearrangement reaction Questions clarify the most important concept of organic chemistry. The reaction mechanism of all questions solves for a beginner like- a Bachelor of Science in chemistry student. That is why it is easy to read. Thank you for Reading.
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