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 A compound in which 2 of the hydrogens of NH₃ have been replaced by alkyl or aryl groups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

The hydrochlorides of amines form double salt with: 

(a) PtCl₄

(b) AuCl₃

(c) both (a) and (b)

(d) none of these

An amine is reacted with benzene sulphonyl chloride then a solid compound is formed which is insoluble in alkali, The amine is

1. ${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{NH}}_2$

2. ${\mathrm{CH}}_3-\mathrm{NH}-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

3. $({\mathrm{CH}}_3{)}_3\mathrm{N}$

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

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