Van der waals interactions and hydrogen bonds?

Question

I don't understand the difference .... ;\ can somebody please explain. Thanks very much.

Answer 1

H bonding is simply a subset of Van der waal's forces which include      *  dipole–dipole forces

*  hydrogen bonding-------

*  London (instantaneous dipole–induced dipole) forces

*  induced-dipole induced-dipole (dispersion forces)

Answer 2

H-boding is a type of van der waals force. Van der waals are forces that attract molecules together (attractions between molecule and molecule) and are relatively weak. H-boding is the strongest type of van der waals which is due to the polar bonding between the hydrogen and oxygen atom (H becomes partially positive, O becomes partially negative, thus molecules end up attracted to one another in a weak force). There are other types of van der waals forces such as London Dispersion and Dipole-Dipole.