Question

Which of the isomers is more volatile ortho or para nitrophenol?

Answer 1

Ortho nitrophenol is more volatile as compared to para nitro phenol. There is Intramolecular hydrogen bonding in ortho nitrophenol while in para nitrophenol there is intermolecular hydrogen bonding which causes association of molecules. ... Inter molecular hydrogen bonding increases boiling point and reduces volatility.