Question

The boiling point of p-nitrophenol is higher than that of o-nitrophenol because:

• A. $N{O}_2$ groups at a para positive behaves in a different way from that at o-position.
• B. intramolecular hydrogen exists in p-nitrophenol.
• C. there is intermolecular hydrogen bonding in p-nitrophenol.
• D. p-nitrophenol has a higher molecular weight than o-nitrophenol.

Answer 1

Answer: (C)

there is intermolecular hydrogen bonding in p-nitrophenol.

The boiling point of p-nitrophenol is higher than that of o-nitrophenol because there is intermolecular hydrogen bonding in p-nitrophenol and not in o-nitrophenol.