P-dichlorobenzene has higher melting point than its ortho and meta iso

1.	P-dichlorobenzene has higher melting point than its ortho and meta isomers
Answer» It's Because The P- isomers being more symmetrical and FITS closely in the crystal lattice and thus has stronger inter-molecular forces of attraction than o- and m- isomers . As during melting or dissolution , the crystal lattice BREAKS , therefore a large amount of energy is needed to melt or DISSOLVE the p - isomer than the CORRESPONDING o-and m-isomers .

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