Nucleophilic and Electrophilic Substitution in Aryl Halides

Q.

Predict the nature of P in the following reaction

1. 

2. 

3. 

4. All the three

Q. The product P (major) is:

1. 
2. 
3. 
4. 

Q. Aryl halides are less reactive towards substitution nucleophilic unimolecular reactions due to the instability of phenyl cation.

1. True
2. False

Q. Aryl halides are less reactive towards substitution nucleophilic unimolecular reactions due to the instability of phenyl cation.

1. True
2. False

Q.

Replacement of Cl of chlorobenzene to give phenol requires drastic conditions but chlorine of 2, 4-dinitrochlorobenzene is readily replaced because

[CBSE PMT

1. NO₂ make ring electron rich at ortho and para

2. NO₂ withdraws e^- from meta position

3. denotes e^- at meta position

4. NO₂ withdraws e^- from ortho/para positions

Q. Among the following, reaction(s) which give(s) tert-butyl benzene as the major product is/are:

1. 
2. 
3. 
4. 

Q. Toluene when refluxed with $B{r}_2$ in the presence of light mainly gives

1. o-Bromotoluene
2. p-Bromotoluene
3. Mixture of o- and p- bromotoluene
4. Benzyl bromide

Q.

Which of the following structure is more stable?

1. 

2. 

3. 

4. 

Q. Most reactive for alkaline hydrolysis is:

1. 
2. 
3. 
4. 

Q.

Which reaction is used for the preparation of acetophenone?

1. Reimer-Teimann reaction

2. Wurtz-Fittig reaction

3. Friedel-Crafts reaction

4. Cannizzaro’s reaction

Q.

Chlorobenzene is

1. Less reactive than benzyl chloride

2. More reactive than ethyl bromide

3. Nearly as reactive as methyl chloride

4. More reactive than isopropyl chloride