Bromination of (E)-2-butenedioic acid gives

(1) (2R, 3S)-2, 3-dibromosuccinic acid

(2) (2R, 3R)-2, 3-dibroniosuccinic acid

(3) a mixture of (2R, 3R) and (2S, 3S)-2, 3-dibromosuccinic acid

(4) (2S, 3S)-2, 3-dibromosuccinic acid

Subtopic:  Hofmann's Elimination & Saytzeff Elimination |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Consider the following reaction:-

Which response contains all the correct statement about this process?
(1)Dehydration
(2)E2 mechanism
(3)Carbon skeleton migration
(4)Most stable alkene will form
(5)Single-step reaction

(a)1,3        (b)1,2,3         (c)1,2,5          (d)1,3,4

heatH3PO4 OH  +

Subtopic:  Hofmann's Elimination & Saytzeff Elimination |
 54%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

HBr(X) acetoneNaI(Y) (Major); Product (Y) is:

(1) cis-2-butene                                 

(2) trans-2-butene

(3) 1-butene                                   

(4) Iso-butene

 

Subtopic:  Reagents |
 66%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which position will be attacked most rapidly by the nitronium ion (-NO2)+ when the compound undergoes nitration with HNO3/H2SO4 :-

1. A

2. B

3. C

4. D

Subtopic:  Directive Effect of functional grp |
 59%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

The electrophilic aromatic substitution proceeds through a:

(1) free radical

(2) sigma complex

(3) benzyne

(4) carbene

Subtopic:  Reaction Intermediates |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which of the following substitution of benzene is ortho-para in electrophilic substitution and ortho-para in nucleophilic substitution ?

(1) -NO2

(2) -NO

(3) -SO3H

(4) -SO2Me

Subtopic:  Directive Effect of functional grp |
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Which one of the following undergoes nucleophilic aromatic substitution at the fastest rate?
(1) 

(2) 

(3) 

(4) 

Subtopic:  Directive Effect of functional grp |
 71%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Many organic compounds are prepared by using PCl5 because:

(1) OH group of alcohol is easily replaced by chlorine atom

(2) chlorines are added to the unsaturated compounds

(3) it removes water from organic compounds

(4) phosphorus atoms are entered in the alcohol

Subtopic:  SN1 & SN2 Reactions |
 70%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

identify the product in the given reaction:

CH3-CH=CH2+NOClproduct

1. CH3CHCl·CH2·NO

2. CH3CH(NO)·CH2Cl

3. CH3CHCH(Cl)(NO)

4. CH2(NO)·CH2·CH2Cl

Subtopic:  Addition Reaction of C=C |
 58%
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints

Common oxidizing agents used in organic chemistry are;

1. Fenton's reagent

2. osmium tetroxide

3. acidified KMnO4

4. all are correct

Subtopic:  Reagents |
 66%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
Hints