Aniline in a set of the following reactions yielded a coloured product Y.                        

$\underset{(273-278 \mathrm{K})}{\overset{{\mathrm{NaNO}}_2/\mathrm{HCl}}{\to }}X\stackrel{\mathrm{N},\mathrm{N}- \mathrm{dimethylaniline}}{\to }Y$

The structure of Y would be

1.

2. 

3. 

4. 

What is the end product in the following sequences of operations;

Acetamide$\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }\mathrm{A}\stackrel{4\mathrm{H}}{\to }\mathrm{B}$ ?

1. CH₃NH₂                              

2. C₂H₅NH₂

3. CH₃CN                                   

4.  CH₃COONH₄

Name the end product in the following series of reactions,

CH₃COOH $\stackrel{{\mathrm{NH}}_3}{\to }$A$\stackrel{∆}{\to }$B$\stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to }$C:

1. CH₄ 

2. CH₃OH

3. acetonitrile 

4. ammonium acetate

 are ........... isomers.

1.Chain

2. functional

3. position

4. all of these

Primary nitroalkanes on hydrolysis give:

1. RCOOH + NH₂OH

2. RCOOH

3. NH₂OH

4. RCOR

The numbers of primary amines posible for the formula C₄H₁₁N is -

1. 1

2. 2

3. 3

4. 4

The type of isomerism shown by C₆H₅CN and C₆H₅NC is:

1. Position

2. Functional

3. enantiomer

4. Tautomerism

The product D in the following sequence of reactoins is, 

${\mathrm{CH}}_3\mathrm{COOH} \stackrel{{\mathrm{NH}}_3}{\to } A \stackrel{\mathrm{Heat}}{\to } B \stackrel{{\mathrm{P}}_2{\mathrm{O}}_5}{\to } C \stackrel{\mathrm{Na} + {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to } D$ :

1. Ester

2. Amine

3. Acid

4. Alcohol

An aromatic primary amine with cold nitrous acid leads to the formation of:

1. alcohol

2. nitrite

3. diazonium salt

4. benzene

The least basic aqueous solution among the following is -

1. $({\mathrm{CH}}_3{)}_2\mathrm{NH}$

2. ${\mathrm{CH}}_3{\mathrm{NH}}_2$

3. $({\mathrm{CH}}_3{)}_3\mathrm{N}$

4. ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{NH}}_2$