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Question

Among the three isomers of the nitrophenol, the one that is least soluble in water is:

A
m-nitrophenol
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B
o-nitrophenol
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C
p-nitrophenol
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D
none of these
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Solution

The correct option is B o-nitrophenol
Intramolecular hydrogen bonding in ortho-substituted nitrophenol reduces water solubility and increases volatility. Thus, o-nitrophenol is steam distillable while the isomeric p-nitrophenol is soluble in water.

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