How can an organic compound present in an aqueous solution be separated?

$A$ chromatography column,packed with silica gel as the stationary phase,was used to separate a mixture of compounds consisting of $(A)$ benzanilide,$(B)$ aniline,and $(C)$ acetophenone. When the column is eluted with a mixture of solvents,hexane: ethyl acetate $(20: 80)$,the sequence of obtained compounds is:

On which principle does the solvent move on chromatography paper?

Which of the following can be purified by sublimation?

Glycerol is purified by

Glycerol boils at $290\,^oC$ with slight decomposition. Impure glycerin can be purified by: