Which purification method is generally used for a high boiling organic liquid compound,which decomposes below its boiling point?

Two products $X$ and $Y$ are formed in the following reaction sequence: Benzene + $CH_3Cl \xrightarrow{Anhydr. AlCl_3} W \xrightarrow{dil. HNO_3/dil. H_2SO_4, warm} X + Y$. The suitable method that can be used for the separation of products $X$ and $Y$ is:

By the crystallisation of an impure compound,if the mother liquor becomes coloured,what shall be done to remove the colour?

What is the principle of extraction in a separatory funnel?

Which two organic compounds are purified by the sublimation technique?

What is meant by the term "chromatography"?