To separate different fractions of crude oil in the petroleum industry,the method used is:

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.

$p-$nitrophenol and $o-$nitrophenol are separated by

In $TLC$ for compound $X$,$R_f = 0.7$ and for $B$,$R_f = 0.4$. Which substance migrates more?

Describe the simple distillation method for the purification of liquid compounds.

The organic compound which can be purified by steam distillation is