o-nitrophenol is steam volatile, whereas p-nitrophenol is not. This is due to:

The presence of intermolecular H-Bonding in o-nitrophenol

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The presence of intramolecular H-Bonding in o-nitrophenol

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The presence of intramolecular H-Bonding in p-nitrophenol

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None of these

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Solution

The correct option is B The presence of intramolecular H-Bonding in o-nitrophenol
o-nitrophenol forms intramolecular H-bond whereas p-nitrophenol forms intermolecular H-bond. Strong intermolecular H-bonding increases the boiling point but intramolecular H-bonding cannot do so.

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Ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to [CBSE PMT 1989]

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