Explain (i) Dispersion forces (ii) Dipole Dipole forces (iii) Dipole induced Dipole forces (iv) Hydrogenbond by giving example.

Dispersion/London Force: These are the force of attraction found between non polar molecules which arises due to the movement of electrons .Due to the motion, at one instant of time the electronic clouds of one molecule get distorted to make a momentry dipole which attracts the other momentry dipole of another molecule and this creates a force of attraction called as london force or dispersion force.

Dipole-dipole interaction: It is a force of attraction which occurs between the polar molecules. Actually the polar molecules have permanent dipoles thus the positive pole of one molecule attracts the negative pole of another molecule and vice -versa.

Dipole induced Dipole: This is arises when a polar molecule is come in contact of non-polar molecule. So the charge cloud of polar molecule induces a kind of dipole in non-polar molecule. This means polar molecule cause polarization of non-polar molecule and then interact with it.

All three is compared in given diagram

Hydrogen bonding : When a compound containing hydrogen atom is suroounded with the molecules containing electronegative atoms like O ,N, F etc then they create a bond which is called hydrogen bond.

the example is showing the hydrogen bonding in water molecule.