Among the following, the strongest base is:

1. C₆H₅NH₂

2. p-NO₂-C₆H₄NH₂

3. m-NO₂-$C_6$H₄NH₂

4. CH₃CH₂NH₂

An amine reacts with ${\mathrm{C}}_6{\mathrm{H}}_5{\mathrm{SO}}_2\mathrm{Cl}$ and the product is soluble in alkali, amine is:

(a) $1°$

(b) $2°$

(c) $3°$

(d) all of those

Among following reactions, the reaction does not yield an amine is-

1. 

2. 

3. 

4. 

The end product in the following sequence of reactions is

${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2\stackrel{{\mathrm{HNO}}_2}{\to }A \stackrel{{\mathrm{PCl}}_5}{\to }B\stackrel{{\mathrm{NH}}_3}{\to }C?$
$$

1. Ethyl cyanide

2. Ethylamine

3. Methylamine

4. Acetamide

Identfy X in the sequence,

$X \stackrel{{\mathrm{HNO}}_2}{\to }{\mathrm{C}}_3{\mathrm{H}}_8\mathrm{O} \underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7}{\to }}{\mathrm{C}}_3{\mathrm{H}}_6{\mathrm{O}}_2$ :

(a) ${\mathrm{CH}}_3-\mathrm{NH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

(b) ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_2-{\mathrm{NH}}_2$

(c) $({\mathrm{CH}}_3{)}_3\mathrm{N}$

(d) none of the above

CH₃CH₂NH₂ contains a basic NH₂ group, but CH₃CONH₂ does not, because;

1. Acetamide is amphoteric in nature

2. In CH₃CH₂NH₂ the electron pair on N-atom is delocalized by resonance

3. In CH₃CH₂NH₂ there is no resonance, while in acetamide the lone pair of electron on N-atom is delocalized and therefore less available for protonation

4. None of the above

Tertiary nitro compounds cannot show tautomerism because:

(a) they are very stable

(b) isomerises to give sec. nitro compounds

(c) do not have labile H-atom

(d) they are highly eactive

Aniline and ethylamine resembles in:

1. Solubility

2. Action with HNO₂

3. Action of Grignard reagent

4. Coupling reaction

A secondary amine is:

1. A compound with two -NH₂ groups

2. A compound with 2 carbon atoms and a -NH₂ group

3. A compound with a -NH₂ group on the carbon atom in number 2 position

4. A compound in which 2 of the hydrogens of NH₃ have been replaced by alkyl or aryl groups

This reaction is an example of?

(a) Intermolecular C-N coupling
(b) Intramolecular C-N coupling
(c) Intermolecular N-N coupling
(d) Intramolecular N-N coupling