p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Disc

1.	p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Discuss
Answer» The p-isomer being more symmetrical fits closely in the crystal lattice and thus has stronger inter- molecular forces of attraction than o- and m-isomers. Since 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. ln other words, the melting point of the p-isomer is higher and its solubility lower than the corresponding o-and m-isomers.

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p-Dichlorobenzene has higher m.p. than those of o- and m-isomers. Discuss

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