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Acidity of Alcohols and Phenols

Why ortho-Nit...

Question

Why ortho-Nitrophenol is steam volatile while para-Nitrophenol is less volatile?

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Solution

Ortho nitrophenol is more volatile than para nitrophenol because O-Nitrophenol has intramolecular hydrogen bonding whereas para nitrophenol has inter molecular H bonding and so boils relatively at higher temperature.

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

Q. Ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to

1.

Intramolecular hydrogen bonding present in ortho-nitrophenol

2.

Intermolecular hydrogen bonding present in para-nitrophenol

3.

Intramolecular hydrogen bonding present in para-nitrophenol

4.

Inter-molecular hydrogen bonding present in ortho-nitrophenol.

Q. While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile? Give reason.

Q. Ortho-Nitrophenol is more volatile than

p

-nitrophenol because of :

Q. Assertion :A mixture of o-nitrophenol and p-nitrophenol can be separated by steam distillation. Reason: p-nitrophenol is steam volatile whereas o-nitrophenol is not steam volatile.

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