Theoretical organic chemistry / by Julius B. Cohen.

  • Cohen, Julius B. (Julius Berend), 1859-1935.
Date:
1942
Catalogue details

Licence: In copyright

Credit: Theoretical organic chemistry / by Julius B. Cohen. Source: Wellcome Collection.

    36/636 (page 16)
    Questions on Chapter I 1. Give reasons for retaining organic chemistry as a separate branch of chemistry. 2. What is meant by fractional crystallisation and fractional dis¬ tillation ? With what object are these two processes employed ? 3. Explain the principle of the fractionating column. Can the process of fractional distillation be employed in the separation of all mixtures of volatile liquids of different boiling-points ? 4. How is the purity of organic liquids and solids ascertained ? 5. Devise methods for separating the constituents in the following mixtures: (1) alcohol from water; (2) benzene from alcohol; (3) glycerol (glycerine) from water.