Which of the following is the most correct electron displacement for a nucleophilic reaction to take place? 

1.   
2.    

3.  

4.   
Subtopic:  Reaction Intermediates |
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Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating ?

1. –SO3H

2. –COOH

3. –NO2

4. –C≡N

Subtopic:  Directive Effect of functional grp |
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Among the following compounds the one that is most reactive towards electrophilic nitration is
1. Benzoic acid
2. Nitrobenzene
3. Toluene
4. Benzene

Subtopic:  Reagents |
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Among cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV) the correct order of decreasing acidic character will be?

1. III>II>IV>I
2. II>III>I>IV
3. II>III>IV>I
4. III>IV>II>I

Subtopic:  Directive Effect of functional grp |
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Which one is most reactive towards SN1 reaction?

1. C6H5CH(C6H5)Br

2. C6H5CH(CH3)Br

3. C6H5C(CH3)(C6H5)Br

4. C6H5CH2Br

Subtopic:  SN1 & SN2 Reactions |
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Which of the following reactions is an example of nucleophilic substitution reaction?
1. RX + KOH → ROH + KX
2. 2RX + 2Na →R — R + 2NaX
3. RX + H2→RH + HX
4. RX + Mg →RMg X
Subtopic:  SN1 & SN2 Reactions |
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Trichloroacetaldehyde, CCl3CHO reacts with chlorobenzene in presence of sulphuric acid and produces
1. 
2. 
3. 
4. 

 

Subtopic:  Addition Reaction of C=N, C=0 |
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The relative reactivities of acyl compounds towards nudeophilic 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:  Directive Effect of functional grp |
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Which one of the following is most reactive towards electrophilic attack?

1.  

2.  

3.  

4.  

Subtopic:  Directive Effect of functional grp |
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In a SN2 substitution reaction of the type 
 R-Br+Cl-DMFR-Cl+Br-
which one of the following has the highest relative rate?

1.  CH3-CH2-CH2Br

2.  CH3-CH|Br-CH2Br

3.  CH3-C||CH3CH3-CH2Br

4.  CH3CH2Br

Subtopic:  SN1 & SN2 Reactions |
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