Question

In which of the following molecules intra molecular hydrogen bonding is present? a) HF b) O-nitro phenol c) H2O d) NH3​

Answer 1

Answer:

O-nitro phenol

Explanation:

When phenol is nitrated by dilute HNO3, two products form : o-nitrophenol & p-nitrophenol . Both solid isomers could be separated & compared.

o-Nitrophenol forms intramolecular H bond whereas molecules of p-Nitrophenol get associated through intermolecular H bonding.  Consequences of this, e.g.:

i) p-Nitrophenol has higher boiling point than the ortho isomer.

ii) p-Nitrophenol is more acidic than the ortho isomer since the (H) of (-OH) is "caged" by the intramolecular H-bonding in the ortho product.

Answer 2

Your answer is Ortho nitro phenol, this is because of the electron withdrawing group present in benzene ring

This pulls the hydrogen atom connected to the oxygen atom towars the nitro group

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