What type of force is a hydrogen bond?

What type of intermolecular or intramolecular forces are present in ethylene glycol?

Hydrogen bonding plays a central role in the following phenomena:
$(A)$ Ice floats in water.
$(B)$ Higher Lewis basicity of primary amines than tertiary amines in aqueous solutions.
$(C)$ Formic acid is more acidic than acetic acid.
$(D)$ Dimerisation of acetic acid in benzene.

Which of the following interactions lies in the range of $8 - 42 \, kJ/mol$?

$HCl$ is a gas but $HF$ is a low boiling liquid. This is because

Number of molecules from the following which can exhibit hydrogen bonding is $..........$ (nearest integer).
$CH_3OH, H_2O, C_2H_6, C_6H_6, \text{o-nitrophenol}, HF, NH_3$