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

Given below are two statements $:$
Statement $(I) :$ In partition chromatography,stationary phase is a thin film of liquid present on an inert support.
Statement $(II) :$ In paper chromatography,the material of the paper acts as a stationary phase.
In the light of the above statements,choose the correct answer from the options given below $:$

The technique used for purification of steam volatile water immiscible substances is:

Describe the crystallisation technique used for the purification of organic compounds.

Aniline is usually purified by

The most suitable method of separation of a $1:1$ mixture of $ortho$- and $para$-nitrophenols is: