What are molecular solids? State its types.

(N/A) Molecular solids are solids in which the constituent particles are molecules held together by weak Van der Waals forces or hydrogen bonds.
Examples include $I_2$,$P_4$,and $H_2O$ (ice).
Molecular solids are classified into three types:
$i$. Non-polar molecular solids: These consist of atoms or non-polar molecules held by weak London dispersion forces.
$ii$. Polar molecular solids: These consist of polar molecules held by dipole-dipole interactions.
$iii$. Hydrogen-bonded molecular solids: These consist of molecules containing hydrogen atoms linked to highly electronegative atoms ($N$,$O$,or $F$),held by strong hydrogen bonds.