van der Waals forces between molecules

1. Van der Waals forces are both attractive and repulsive.
2. Weakest of Van der Waals forces are called dipole dipole interaction.
3. The Van Der Waals force present in Hydrogen Fluoride gas is Hydrogen bonds .
4. Strongest of Van der Waals forces is called London Dispersion forces.
5.The strongest of Van Der Waals forces is called Hydrogen bond.