( ii ) Polar Molecular Solids : o The molecules like HCl , SO2 , are formed by polar covalent bonds .
o
In polar Molecular solids the comprised atoms or molecules are held together by stronger dipole-dipole interactions .
o They are soft and non-conductors of electricity .
o
The melting points of these solids are higher than those of non-polar molecular solids and usually exist in liquid or gaseous state at room temperature and pressure .
o Molecules like SO2 and solid NH3 are some examples of such solids .