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| 1. |
p-Dichorobenzene has higher melting point and lowerr solubility than those of o- and m-isomers. Discuss. |
| Answer» Solution :The p-isomer being more symmetrical fits closely in the crystal lattice and thus has stornger INTERMOLECULAR forces of attraction than those of o- and m-isomers. Since during melting or DISSOLUTION, the crystal lattice breaks, therfore, a larger amount of ENERGY is needed to melt or dissolve the p-isomer than the corresponding o-and m-isomers. in other words, the melting POINT of the p-isomer is higher and it ssolubility lower than the corresponding o- and -isomers. | |