Account for the following:

N-ethylethanamine boils at $329.3\mathrm{K}$ and butanamine boils at $350.8\mathrm{K}$, although both are isomeric in nature. 

Explain the following :

Amines are less acidic than alcohols of comparable molecular masses.

Given below are two statements :

Statement I : Pure Aniline and other arylamines are usually colourless.

Statement II : Arylamines get coloured on storage due to atmospheric reduction.

In the light of the above statements, choose the most appropriate answer from the options given below :

Arrange the following in increasing order of boiling points :
${\left({\mathrm{CH}}_3\right)}_2\mathrm{NH}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{OH}, {\mathrm{C}}_2{\mathrm{H}}_5{\mathrm{NH}}_2$

Arrange the following compounds in decreasing order of their boiling points:

Butanol, Butanamine, Butane

Give reasons : ${\left({\mathrm{CH}}_3\right)}_2\mathrm{NH}$ is more basic than ${\left({\mathrm{CH}}_3\right)}_3\mathrm{N}$ in an aqueous solution.

n-butylamine (I), diethylamine (II) and N, N-dimethylethylamine (III) have the same molar mass. The increasing order of their boiling point is

Account for the following:

Ethylamine is soluble in water whereas aniline is not.

Arrange the following in increasing order of boiling point: ${\mathrm{C}}_2{\mathrm{H}}_5\mathrm{O}\mathrm{H}, {\left(\mathrm{C}{\mathrm{H}}_3\right)}_2\mathrm{N}\mathrm{H}, {\mathrm{C}}_2{\mathrm{H}}_5\mathrm{N}{\mathrm{H}}_2$.

n-butylamine (I), diethylamine (II) and N, N-dimethylethylamine (III) have the same molar mass. The increasing order of their boiling point is