The compound A and B respectively are

Reaction of $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-{\mathrm{NH}}_2$ with a mixture of Br₂ and KOH gives R-NH₂ as the main product. The intermediates involved in this reaction are: 

1. $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-\mathrm{NHBr} \mathrm{and} \mathrm{R}-\mathrm{N}=\mathrm{C}=\mathrm{O}$

2. RCN

3. $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-{\mathrm{NBr}}_2$

4. RNHBr

In which of the following reaction cyanide will be obtained as a major product ?

1. 

2. 

3. 

4. 

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

A will be:

(a) CH2 = $\begin{array}{ccccc}\mathrm{CH}& -& \underset{\mathrm{OH}}{\underset{|}{\mathrm{CH}}}& -& {\mathrm{CH}}_3\end{array}$

(b) 

(c)  

(d) 

$\underset{{\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{{\mathrm{LiAlH}}_4\left(\mathrm{excess}\right)}{\to }}product$

The product formed in the above reaction is -

1. 

2. 

3. 

4. 

Which of the following reactions can be used to prepare acetophenone?

1. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CN} \underset{2{\mathrm{H}}_2\mathrm{O}}{\overset{1.{\mathrm{AlCl}}_3}{\to }}$

2. ${\left({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{COO}\right)}_2\mathrm{Ca} + {\left({\mathrm{CH}}_3\mathrm{COO}\right)}_2\mathrm{Ca}\stackrel{ \mathrm{heat} }{\to }$

3. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{CN} \underset{2 {\mathrm{H}}_3{\mathrm{O}}^{+}}{\overset{1.{\mathrm{CH}}_3\mathrm{MgI}}{\to }}$

4. Both 2, and 3

Above compounds (P) & (Q) can be differentiated by:

1. amm. AgNO₃

2. NaOH

3. FeCl₃

4. Both 1 & 2

Identify the product (A)  in following reaction series,

CH₃CN $\stackrel{\mathrm{Na}/{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$(X) $\stackrel{{\mathrm{HNO}}_2}{\to }$(Y) $\stackrel{\left[\mathrm{O}\right]}{\to }$(Z) $\stackrel{\mathrm{Tollens} \mathrm{reagent}}{\to }$(A):

(a) CH₃CHO

(b) CH₃CONH₂

(c) CH₃COOH

(d) CH₃-CH₂-NHOH

Amine may contain:

Which nitro compound will show tautomerism ?

(a) ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NO}}_2$

(b) $({\mathrm{CH}}_3{)}_3{\mathrm{CNO}}_2$

(c) ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NO}}_2$

(d) o-nitrotoluene