During steam distillation of a mixture of $O^{-}$ nitrophenol and p – nitrophenol, which of the
statement is false

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both 2 & 3

vapours of $O^{-}$ nitrophenol are carried by steam because of its lower boiling point due to

chelation

vapours of p- nitrophenol are carried by steam because of its lower boiling point.

vapours of $O^{-}$ nitrophenols are carried by steam becuae of its lower boiling point and

solubility in steam

answer is D.

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Detailed Solution

Ortho nitrophenol has intra molecular hydrogen bonding while para introphenol has

intemolecualr hydrogen bonding (comparatively stronger). Due to this reason, the boiling point of o– nitrophenol less than that of p – nitro phenol. Hence O – nitro phenol is steam volatile and can be separated from P – nitro phenol by steam distillation.

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