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

Grignard reagent and acetyl chloride does not react with:

(1) ${\mathrm{RNH}}_2$

(2) ${\mathrm{R}}_2\mathrm{NH}$

(3) ${\mathrm{R}}_3\mathrm{N}$

(4) None of these

General formula of an amine is:

(1) ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+1}\mathrm{N}$

(2) ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+2}\mathrm{N}$

(3) ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}+3}\mathrm{N}$

(4) ${\mathrm{C}}_{\mathrm{n}}{\mathrm{H}}_{2\mathrm{n}}\mathrm{N}$

The amine may contain:

(1) $-{\mathrm{NH}}_2 \mathrm{gp}.$

(2) $\underset{\left|}{\overset{\right|}{\mathrm{N}}}\mathrm{H}$ gp.

(3) $-\underset{\left|}{\overset{\right|}{\mathrm{N}}}$ gp.

(4) all of these