In the steam distillation of toluene, the pressure of toluene in the vapour is:
1. | Equal to the pressure of the barometer |
2. | Less than the pressure of the barometer |
3. | Equal to vapour pressure of toluene in simple distillation |
4. | More than the vapour pressure of toluene in simple distillation |
The best method for the separation of naphthalene and benzoic acid from their mixture is:
1. Sublimation
2. Chromatography
3. Crystallisation
4. Distillation