$\stackrel{\mathrm{NBS}}{\to }$(A)$\stackrel{{\mathrm{CH}}_3\mathrm{SNa}}{\to }$(B), Product (B) is:

1.

2.  

3. 

4. None of these

What is the major product of the following reaction?

${\mathrm{H}}_2\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{OH} \underset{\mathrm{excess}}{\overset{\mathrm{HBr}}{\to }} \mathrm{Product}$

1.  ${\mathrm{CH}}_3-\stackrel{\mathrm{Br}}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-\mathrm{Br}$

2.  ${\mathrm{H}}_2\mathrm{C}=\mathrm{CH}-{\mathrm{CH}}_2-\mathrm{Br}$

3.  ${\mathrm{CH}}_3-\stackrel{\mathrm{Br}}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-\mathrm{OH}$

4.  ${\mathrm{CH}}_3-\stackrel{OH}{\stackrel{|}{\mathrm{CH}}}-{\mathrm{CH}}_2-\mathrm{OH}$

S_N1 and S_N2 products are the same with (excluding stereoisomer):-

1.  
 2.  
3.  

4. 

Consider the nucleophilic attacks given below. Select in each pair that shows the greater S_N2 reaction rate.

(A)  

(B) $H_{3}C-Br+{}_{-}SH or H_{3}C-Br+C{H}_{3}SH$
$\left(iii\right) \left(iv\right)$

(C)  

(D)  


     A   B    C     D
1.  II   IV   VI   VIII
2.  II   III   V    VIII
3.  I    III   V    VIII
4.  I    III   V    VII 

Addition of KI accelerates the hydrolysis of primary alkyl halides because:

1. KI is soluble in organic solvents

2. the iodide ion is a weak base and a poor leaving group

3. the iodide ion is a strong base

4. the iodide ion is a powerful nucleophile as well as a good leaving group

The product X in the below mentioned reaction is:

1.		2.
3.		4.

What is the relative rate of reaction of the following amine when treated with methyl iodide?

(1) A > B > C

(2) A > C > B

(3) B > C > A

(4) B > A > C

Major product of the above reaction is:

1. 

2. 

3. 

4. 

Anisole$\underset{\mathrm{reflux}}{\overset{\mathrm{excess} \mathrm{HI} (\mathrm{conc}.)}{\to }}$Product

1. 

2. 

3. 

4. 

Which of the following compounds would react faster with NaCN in an S_N² reaction?

1. 

2. 

3. 

4.