$\mathrm{R}-\mathrm{N}\underrightarrow{=}\mathrm{C}+\mathrm{HgO}\to \mathrm{A}+\mathrm{Hg}{}_2\mathrm{O}$ ; What is A?

1.  ${\mathrm{RNH}}_2$

2.  ${\mathrm{RCONH}}_2$

3.  $\mathrm{R}-\mathrm{NCO}$

4.  $\mathrm{RCOOH}$

 

Which of the following can be used to distinguish acetamide and urea?

1.  Fehling's solution

2.  Biuret test

3.  Hofmann's reaction

4.  NaOH solution

A colourless, odourless and non-combustible gas is liberated when ethylamine reacts with:

1.  NaOH

2.  ${\mathrm{CH}}_3\mathrm{COCl}$

3.  ${\mathrm{NaNO}}_2+\mathrm{HCl}$

4.  ${\mathrm{H}}_2{\mathrm{SO}}_4$ 

Carbonyl chloride reacts with ammonia to form:

1.  ${\mathrm{CO}}_2$

2.  ${\mathrm{NH}}_2{\mathrm{CONH}}_2$

3.  ${\mathrm{CH}}_3{\mathrm{COONH}}_4$

4.  ${\mathrm{CH}}_3{\mathrm{CONH}}_2$

Which of the following is hydrolyzed to give secondary amine?

1.  Alkyl cyanide

2.  $HCO{N}_{{\backslash }_{C{H}_3}}^{{/}^{C{H}_3}}$

3.  Nitroparaffins

4.  Acidamide

When aniline is heated with glacial acetic acid in the presence of anhydrous ${\mathrm{ZnCl}}_2$, the product is:

1. Acetamide

2. Acetanilide

3. Phenyl acetamide

4. Chlorobenzene

Carcinogens are the products of the reaction between:

1.  ${\mathrm{R}}_2\mathrm{NH}+{\mathrm{HNO}}_2$

2.  ${\mathrm{R}}_3\mathrm{N}+{\mathrm{HNO}}_2$

3.  ${\mathrm{RNH}}_2+{\mathrm{HNO}}_2$

4.  none of these 

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