If there is no rotation of plane polarized light by a compound in a specific solvent, thought to be chiral,

it may mean that:

(1) the compound is certainly a chiral

(2) the compound is certainly meso

(3) there is no compound in the solvent

(4) the compound may be a racemic mixture

Subtopic:  Stereo Isomers |
 57%
NEET - 2007
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For the following :

(i) I-

(ii) Cl-

(iii) Br-

the increasing order of nucleophilicity would be :

1. I- < Br- < Cl-

2. Cl- < Br- < I-

3. I- < Cl- < Br-

4. Br- < Cl- < l-

Subtopic:  Nucleophile & Electrophile |
 57%
NEET - 2007
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The stability of carbanions in the following

(1) RCC

(2) 

(3) R2C=CH

(4) R3C-CH2

is in the order of

(a) (1)>(2)>(3)>(4)

(b) (2)>(3)>(4)>(1)

(c) (4)>(2)>(3)>(1)

(d) (1)>(3)>(2)>(4)

Subtopic:  Reaction Intermediates ; Preparation & Properties |
From NCERT
NEET - 2008
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Please attempt this question first.

A strong base can abstract an α-hydrogen from

1. alkene

2.amine

3. ketone

4. alkane

Subtopic:  Nucleophile & Electrophile |
NEET - 2008
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Which one of the following is most reactive towards electrophillic attack?

(a) 

(b) 

(c) 

(d) 

Subtopic:  Types of Reaction |
 65%
NEET - 2008
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The relative reactivates of acyl compounds towards nucleophilic substitution are in the order of

(1) Acyl chloride > Acid anhydride > Ester > Amide

(2) Ester > Acyl Chloride > Amide > Acid anhydride

(3) Acid anhydride > amide > Ester > Acyl chloride

(4) Acyl chloride > Ester > Acid anhydride > Amide

Subtopic:  Nucleophile & Electrophile |
 59%
NEET - 2008
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The IUPAC name of the compound having the formula CHC-CH=CHis

1. 3-butene-1-yne

2. 1-butyn-3-ene

3. but-1-yne-3-ene

4. 1-butene-3-yne

Subtopic:  Nomenclature |
 70%
From NCERT
NEET - 2009
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Which one is most reactive towards electrophilic reagent?

 

Subtopic:  Nucleophile & Electrophile |
 53%
NEET - 2010
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Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

1. CH3COOCH3

2. CH3CONH2

3. CH3COOCOCH3

4. CH3COCl

Subtopic:  Nucleophile & Electrophile |
 54%
NEET - 2010
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The correct order of increasing reactivity of C-X bond towards nucleophile in the following

compounds is

1. I < II < IV < III

2. II < III < I < IV

3. IV < III < I < IV

4. III < II < I < IV

Subtopic:  Nucleophile & Electrophile |
 59%
NEET - 2010
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