Nucleophilic Substitution in Aryl Halides

Q. In the following sequence of reactions,

\( H _{3} C - Br \stackrel{ KCN }{\longrightarrow} Ether \underset{ Ci LiAlH _{4} O ^{+}}{\longrightarrow} \)the product (C) is :

(AIPMT 2012 (PRE))

1. Ethyl alcohol
2. Acetone
3. Methane
4. Actaldehyde

Q. What is the order of reactivity of the following compounds towards nucleophilic substitution?

1. $IV<I<II<III$
2. $III<IV<II<I$
3. $II<IV<III<I$
4. $IV<III<II<I$

Q. Ortho chlorotoluene on oxidation with $KMn{O}_4$ gives

1. o-Chlorobenzaldehyde
2. Benzoic acid
3. o- Chlorobenzoic acid
4. Toluene

Q. Bottles containing C₆H₅I and C₆H₅CH₂I lost their original labels. They are labelled as A and B. A and B were separately taken in a test tubes and boiled with NaOHsolution.Then in each test tube Dilute HNO₃ and Ag NO₃ was added. Substance B gave a yellow precipitate. Which one of thefollowingstatements is true for this experiment?

1. Addition of HNO₃ was not necessary

2. B was C₆H₅I

3. A was C₆H₅Cl

4. A was C₆H₅CH₂I

Q.

The structure of the major product formed in the following reaction is

1. 
   

2. 
   

3. 
   

4. 
   

Q. Which of the following will be the least reactive towards nucleophilic substitution

1. 
2. C₂H₅Cl
3. 
4. 

Q.

Which of the following statements is incorrect for low reactivity of chloro benzene

1. sp² hybridised state of C atom

2. Polarity of C-X bond

3. Due to +E effect of Cl

4. Due to resonance

Q. The final product obtained in the reaction

1. 
2. 
3. 
4. 

Q. Which of the following compounds undergoes replacement of $-Cl$ by $-OH$ by merely warming the compound with aqueous NaOH

1. 
2. 
3. 
4. 

Q.

The Dow's process is used for the preparation of

1. Fluorobenzene

2. Bromobenzene

3. Phenol

4. Chlorobenzene