Question

p - dichlorobenzene has higher melting point and lower solubility than those of o - and m-isomers. Discuss. ?

Answer 1

Out of the above three isomers of dichlorobenzene, the p-isomer is more symmetrical than other two isomers, So, it has more closely packed arrangement of molecules in its crystal lattice. So, p-dichlorobenzene has a higer melting point and lower solubility as compared to ortho and meta isomers.