Glycerol is purified by

Which type of solvent is added to an aqueous solution in the differential extraction method?

Thin-layer chromatography is an example of

Compare the pressure of aniline and water in vapour phase distillation.

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

By mistake,an alcohol (boiling point $97\,^{\circ}C$) was mixed with a hydrocarbon (boiling point $68\,^{\circ}C$). Suggest a suitable method to separate the two compounds. Explain the reason for your choice.