Chemistry Engineering Question:

A hydrogen bond is a special type of attractive interaction (perhaps a variation of a dipole-dipole bond) that exists between an electronegative atom and a hydrogen atom bonded to another electronegative atom. This type of bond always involves a hydrogen atom, thus the name. Hydrogen bonds can occur between molecules (intermolecular) or within different parts of a single molecule (intramolecularly). The typical hydrogen bond is stronger than van-der-Waals forces, but weaker than covalent or ionic bonds.