Which of the following alkene cannot be prepared by de-amination of n-Bu-NH₂ with NaNO₂/HCl ?

(1) 1-butene

(2) cis-2-butene

(3) trans-2-butene

(4) Iso-butene

 $\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{NaNO}}_2}{\to }} \left(\mathrm{A}\right); \mathrm{Product} \mathrm{of} \mathrm{this} \mathrm{reaction} \mathrm{is}:$

1.  

2. 

3.  

4.  

 $\stackrel{{\mathrm{HNO}}_2}{\to }$(A) + + CH₂ = CH-CH₂-CH₂-OH   

A will be:

(a) $\begin{array}{ccccc}{\mathrm{Ch}}_2 = \mathrm{CH}& -& \underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}& -& {\mathrm{CH}}_3\end{array}$

(b) 

(c) 

(d) 

Identify product D in the following reaction sequence:

1.  $C{H}_3$
$|$
$C{H}_{3}CC{H}_{2}C \equiv N$
$|$
$C{H}_3$

2.  $C{H}_3$
$|$
$C{H}_{3}CC{H}_{2}C{H}_{2}N{\left(C{H}_3\right)}_2$
$|$
$C{H}_3$

3.   $C{H}_3 N{\left(C{H}_3\right)}_2$
$| |$
$C{H}_{3}CC{H}_{2}CHN{\left(C{H}_3\right)}_2$
$|$
$C{H}_3$

4.   $C{H}_3$
$|$
$C{H}_{3}CC{H}_{2}CHN{\left(C{H}_3\right)}_2$
$| |$
$C{H}_{3 } OH$

Which amine yields N-nitroso amine after treatment with nitrous acid (NaNO₂, HCl) ?

1.		2.
3.		4.

The product formed in the below mentioned reaction is:

1.		2.
3.		4.

Deamination (or) diazotization of n-Bu-NH2 with NaNO₂/HCl gives ......... isomeric butene.

(1) 2

(2) 3

(3) 4

(4) 5

 $\underset{{\mathrm{H}}_2\mathrm{O}}{\overset{{\mathrm{Br}}_2}{\to }}$ (A) $\underset{\left(\mathrm{ii}\right) {\mathrm{H}}_3{\mathrm{PO}}_2}{\overset{\left(\mathrm{i}\right) {\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}$ (B), Product (B) in this reaction is:

1. 

2. 

3. 

4. 

Product (B) of this reaction is:-
1. 

2. 

3. 

4.  

This reaction is example of ?
(1) Intermolecular C-N coupling

(2) Intramolecular C-N coupling

(3) Intermolecular N-N coupling

(4) Intramolecular N-N coupling