Which among the following is steam volatile?

o-nitrophenol

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Aniline

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Glycerol

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p-nitrophenol

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Solution

The correct option is A o-nitrophenol
Molecules having intermolecular H-bonding have higher boiling points (less volatile) than the molecules having intramolecular H-bonding.
So, due to intramolecular H-bonding, o-nitrophenol is steam volatile whereas, other molecules have intermolecular H-bonding.

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