Hofmann's rearrangement During the conversion of an amide to amine involves ..... rearrangement.

1.  Intermolecular

2.  Intramolecular

3.  Both (1) and (2)

4.  None of the above 

Aniline is a weaker base than ethylamine because:

1. lone pair of electrons of N-atom is not freely available for coordination due to resonance than in ethylamine.

2. Its b.p. is higher than that of ethylamine.

3. It does not produce a sufficient concentration of ${\mathrm{OH}}^{-}$ ions in solution.

4. It is insoluble in water while ethylamine is soluble in water.

Diethyl carbonate on heating with ammonia gives:

1.  ${\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2$

2.  ${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_{3}N$

3.  ${\left({\mathrm{C}}_2{\mathrm{H}}_5\right)}_{2}NH$

4.  Urea

Nitroalkane is acidic only towards:

1.  ${\mathrm{Na}}_2{\mathrm{CO}}_3$

3.  $\mathrm{NaOH}$

3.  alcohol

4.  liquid ${\mathrm{NH}}_3$

Primary, secondary, and tertiary amines may be separated by using:

1.  Ethanoyl chloride 

2.  Diethyl oxalate

3.  Thionyl chloride

4.  None of the above

The name urea was given by:

1. Wohler

2. Berzelius

3. Roulle

4. Lemery

Urea when heated a white residue is formed. Its alkaline solution when treated with few drops of ${\mathrm{CuSO}}_4$ solution gives:

1. Red colour

2. Violet colour

3. Green colour

4. Yellow colour

The diamide of carbonic acid is:

(1) acetamide

(2) formamide

(3) benzamide

(4) urea

The basic character of methylamines in vapour phase is:

(1) $3°>2°>1°>N{H}_3$

(2) $2°>3°>1°>{\mathrm{NH}}_3$

(3) $1°>2°>3°>{\mathrm{NH}}_3$

(4) None of these

Gabriel's phthalimide reaction is used to prepare:

(1) Primary amine

(2) Secondary amine

(3) Tertiary amine

(4) All of the above