(i) The loss of a proton from an amine gives an imide ion, while the loss of a proton from alcohol gives an alkoxide ion as shown below:

$\underset{\text{ Amine }}{\mathrm{R}}-{\mathrm{NH}}_2\to \mathrm{R}-\underset{\text{ Imide ion }}{{\mathrm{NH}}^{⊝}}+{\mathrm{H}}^{\oplus }$

R – O – H → R – O^⊖ + H^⊕

Since O is more electronegative than N, therefore, (RO^⊖) can accomodate the negative charge more easily than R^⊖NH can accomodate the negative charge.

In other words, RO^⊖ is more stable than R^⊖NH. Thus, alcohols are more acidic than amines. Conversely, amines are less acidic than alcohols.

(ii) 1º amines form stronger intermolecular H-bonding between N atom of one and H atom of another molecule.

(iii) Aliphatic amines are stronger bases due to the +I effect of the alkyl group, leading to high electron density on the N atom.