When is steam distillation applied?

How will you separate a mixture of two organic compounds which have different solubilities in the same solvent?

Given below are two statements: One is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: Thin layer chromatography is an adsorption chromatography.
Reason $R$: $A$ thin layer of silica gel is spread over a glass plate of suitable size in thin layer chromatography which acts as an adsorbent.
In the light of the above statements,choose the correct answer from the options given below.

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

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

In thin layer chromatography,a substance moved by a distance of $4 \ cm$,whereas the solvent moved by a distance of $5 \ cm$. Then the value of retardation factor $(R_f)$ is