Aniline is usually purified by

What is the purification method based on the principle that the compound and the impurities have different solubilities in a given solvent?

If a liquid compound decomposes at its boiling point,which method$(s)$ can you choose for its purification? It is known that the compound is stable at low pressure,steam volatile,and insoluble in water.

Which of the following statements about $TLC$ are correct?
$(i)$ Glycine is identified on $TLC$ plate due to its colour.
$(ii)$ Amino acids can be detected by spraying the $TLC$ plate with $Ninhydrin$ solution.
$(iii)$ The retardation factor $(R_f)$ is the ratio of the distance travelled by the solute to that of the solvent from the base line.
$(iv)$ Sodium chloride is commonly used as an adsorbent.

Glycerol is separated in soap industries by

Match List-$I$ with List-$II$.

List-$I$ (Purification technique)	List-$II$ (Used to separate)
$A$. Simple distillation	$I$. Steam volatile compound
$B$. Fractional distillation	$II$. Two liquids with large difference in boiling points
$C$. Steam distillation	$III$. Liquid decomposing at its boiling point
$D$. Distillation under reduced pressure	$IV$. Two liquids with close boiling points