Which method is used to separate a mixture of aniline and water?

On a thin layer chromatographic plate,an organic compound moved by $3.5 \ cm$,while the solvent moved by $5 \ cm$. The retardation factor of the organic compound is . . . . . . $\times 10^{-1}$.

If a liquid compound decomposes at its boiling point,which method$(s)$ can you choose for its purification? It is known that the compound is stable at low pressure,steam volatile,and insoluble in water.

Suggest a method for the separation of a mixture of $o$-nitroaniline and $p$-nitroaniline.

Explain why an organic liquid vaporises at a temperature below its boiling point during steam distillation.

Chromatography is used for the purification of: