Which one of the following compounds is steam volatile?
A
o− nitrophenol
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B
Aniline
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C
Glycerol
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D
p− nitrophenol
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Solution
The correct option is Ao− nitrophenol Due to intramolecular hydrogen bonding o-nitro phenol is more volatile and therefore has a lower boiling point. Inter-molecular H-bonding increases the boiling point.