1.

p-nitrophenol and o-nitrophenol are separated by :

Answer»

distillation
steam distillation
crystallization
fractional crystallization

Solution :p-nitrophenol has more boiling point due to intermolecular hydrogen bonding. Separated by distillation

In the o-compound the hydrogen boiling is intramolecular, and so the molecule BEHAVES as a 'single unit'. Hydrogen bonding in the p-compound is intermolecular. Thus, we are DEALING with associated molecules, which behave as a large molecule with high that of the monomer).
Since we have assumed that the o-compound has the type of hydrogen bonding SHOWN, this PRESUMABLY is also possible for the p-compound. On the other hand, hydrogen bonding between hydrozyl groups in the p-compound is possible.


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