Napathalene and Anthracene dissolve in benzene …

Polar molecules are dissolved by polar ,and non polar molecules are dissolved by non polar solvents respectively. This is because in polar solvents the negative end of dipoles surround the cations and positive part of dipoles surround anions , whereas in non polar solvents the vanderwalls forces or weak forces between the molecules of non polar solute are overcome by the weak forces of the solvent and hence they dissolve ,Non polar solutes do not dissolve in water or polar solvents because because the water molecules are strongly attracted to each other . To dissolve a non polar solute the water molecules need to form a cavity which makes less available neighbouring molecules, which causes decrease in entropy and disorderness of water . So the process of such dissolution is unfavorable. . Napthalene and anthracene only dissolve in non polar solvents like benzene and not in water as they are non polar.