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

Explain partition chromatography. What is partition chromatography? Describe paper chromatography.

Given below are two statements:
Statement-$I$: Retardation factor $(R_f)$ can be measured in $meter/centimeter$.
Statement-$II$: $R_f$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below:

The purification method based on the following physical transformation is $:$
$\text{Solid} (X)$ $\xrightarrow{\text{Heat}} \text{Vapour} (X)$ $\xrightarrow{\text{Cool}} \text{Solid} (X)$

Steam distillation process cannot be used for purifying which of the following?

What is the difference between distillation,distillation under reduced pressure,and steam distillation?