B) Fractional crystallisation
D) Steam distillation
Correct Answer: D
Solution :o-nitro phenol has intra molecular hydrogen bonding, while p-nitrophenol has intermolecular hydrogen bonding (comparitively stronger). Due to this reason, the boiling point of o-nitrophenol is found quite less than that of p-nitrophenol. Hence, o-nitrophenol is steam volatile and can be separated from p-nitrophenol by steam distillation.
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