Question

give few points of difference between para-nitrophenol and ortho-nitrophenol .

Answer 1

In p-nitrophenol, molecular association takes place due to extensive hydrogen bonding between the molecules (intermolecular hydrogen bonding). Therefore, it has higher melting and boiling points. In o-nitrophenol, since the OH and NO2 are in close proximity to each other, intramolecular hydrogen bonding takes place.