Question

Define hydrogen bond. Is it weaker or stronger than the van der Waals forces?

Answer 1

The weak electrostatic force of attraction between the highly eletronegetive atoms like F,CL, and hydrogem atom is called hydrogen bond. And hydrogen bond is stronger than the van der waals forces.

Answer 2

Answer:

Hydrogen bonding (H-bonding) is an inter molecular force having partial ionic-covalent character. H-bonding takes place between a hydrogen atom attached with an electronegative atom such as O, N and F and an electronegative atom such as O,N and F. They are strong forces.

Example: $HF$ has hydrogen bonding

Vanderwaal force also known as London Dispersion forces, are intermolecular forces that arise from the electrostatic attraction between temporary dipoles formed by electrons occupying certain positions in atoms. All molecules exert vanderwaal forces. They are weak intermolecular forces.

Example: $H_2$

Thus hydrogen bond is stronger than the van der Waals forces.