What is decreasing order of basicity of p-, s-, t-ethyl amines and ${\mathrm{NH}}_3$ in aqueous medium ?

(1) NH₃>C₂H₅NH₂>(C₂H₅)₂NH>(C₂H₅)₃N

(2) (C₂H₅)₃N>(C₂H₅)₂NH>C₂H₅NH₂>NH₃

(3) (C₂H₅)₂NH>C₂H₅NH₂>NH₃>(C₂H₅)₃N

(4) (C₂H₅)₂NH>(C₂H₅)₃N>C₂H₅NH₂>NH₃

Urea on heating with ethanol gives:

1. Urethane

2. Urea alcohol

3. Ureides

4. None of the above

Alkyl nitrite on reduction with Sn/HCl gives:

1. Alcohol

2. Hydroxylamine

3. Both (a) and (b)

4. Hydrazine

Which of the following compounds is expected to be the most basic?

(1) Aniline

(2) Ethylamine

(3) Hydroxylamine

(4) Methylamine

The action of nitrous acid on a primary amine gives:

(1) nitroalkane

(2) alkyl nitrite

(3) alcohol

(4) secondary amine

The reaction,

${\mathrm{CH}}_3\mathrm{CN}+4\mathrm{H}\stackrel{\mathrm{Na}/{\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{NH}}_2$ is called:

1. Hofmann's bromamide reaction

2. Mendius reaction

3. Sabatier reaction

4. None of the above

A colourless organic compound gave brisk effervescence with a mixture of ${\mathrm{NaNO}}_2$ and dil. HCl. It could be:

(1) glucose 

(2) oxalic acid

(3) urea 

(4)benzoic acid

Identify X in the sequence,

X $\stackrel{{\mathrm{HNO}}_2}{\to }$ C₃H₈O $\underset{{\mathrm{H}}_2{\mathrm{SO}}_4}{\overset{{\mathrm{K}}_2{\mathrm{Cr}}_2{\mathrm{O}}_7}{\to }}$ C₃H₆O₂

(1) CH₃-NH-CH₂-CH₃

(2) CH₃-CH₂-CH₂-NH₂

(3) (CH₃)₃N

(4) none of the above

Aliphatic amines are ......basic than ${\mathrm{NH}}_3$ but aromatic amines are .....basic than ${\mathrm{NH}}_3$

(1) more, less

(2) less, more

(3) both (a) and (b) 

(4) none of these

Aliphatic amines are soluble in water because:

(1) they are basic.

(2) they are amino compounds.

(3) they are lighter than water.

(4) of formation of hydrogen bonds with water.