Question

The most suitable method of separation of $1:1$ mixture of ortho and para-nitrophenols is:

• A. steam distillation
• B. sublimation
• C. chromatography
• D. crystallisation

Answer 1

The correct option is A steam distillation

Ortho and para-nitrophenols are separated by steam distillation because ortho-nitrophenol is steam volatile while para-nitrophenol is not.

As there are intramolecular H-bonds in ortho nitrophenol.