o-nitrophenol has _________ melting point than /j-nitrophenol.
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Explanation: In p-nitrophenol, molecular association takes place due to extensive hydrogen bonding between the molecules (intermolecular hydrogen bonding). Therefore, it has higher melting and boiling points. In o-nitrophenol, since the OH and NO2 are in close proximity to each other, intramolecular hydrogen bonding takes place.
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