Identify the purification technique for the following mixtures:
$(i)$ Chloroform and aniline
$(ii)$ Impure acetone
$(iii)$ Impure aniline
$(iv)$ Chlorobenzene and bromobenzene

What is an eluant?

In the given $TLC$ plate,the distances of spots $A$ and $B$ from the base line are $4 \ cm$ and $6 \ cm$,respectively. The distance moved by the solvent front from the base line is $8 \ cm$. If the $R_f$ value of $B$ is $x \times 10^{-1}$ times that of $A$,find the value of $x$.

What is collected in the flask at the end in steam distillation?

Glycerol boils at $290\,^oC$ with slight decomposition. Impure glycerin can be purified by:

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.