Question

Steam distillation cannot be employed for purification of

Answer 1

Steam distillation is a unique kind of distillation or separation process for temperature sensitive materials such as natural aromatic compounds. It cannot be employed for purification of organic compounds that are:

*Soluble in water

*Non-volatile in steam

*Have a low vapour pressure

*Have volatile impurities

Answer 2

It is the simplest method which is used to isolate materials that are temperature sensitive like organic compounds. It is applicable at a low boiling point in order to avoid decomposition. 

It cannot be applicable in the purification of those organic compounds that are:

 Water soluble, Non-volatile in steam, vapor pressure low and contains volatile impurities.

Hope this will prove helpful for you.