Concept:Hydrogen bonding is an intermolecular force, not a true chemical bond.
Explanation:A hydrogen bond forms when a hydrogen atom attached to a highly electronegative atom, such as nitrogen, oxygen, or fluorine, is attracted to another electronegative atom nearby.
This attraction occurs between separate molecules or between different parts of the same molecule.
It is much weaker than ionic or covalent bonds but stronger than ordinary dipole interactions.
Because it is an electrostatic attraction between molecules, hydrogen bonding is classified as a type of van der Waals force.
It is not a dative bond, ionic bond, or true covalent bond because no electrons are shared or transferred in the hydrogen bond itself.
Answer:A. van der waals force