Ethylene has a high $b.p.$ and high vapour pressure at $100\,^{\circ}C$ and does not dissolve in water. Hence,ethylene is separated by this method:

The correct match between items of List-$I$ and List-$II$ is:

List-$I$	List-$II$
$A$. Coloured impurity	$P$. Steam distillation
$B$. Mixture of $o$-nitrophenol and $p$-nitrophenol	$Q$. Fractional distillation
$C$. Crude oil	$R$. Charcoal treatment
$D$. Mixture of glycerol and sugars	$S$. Distillation under reduced pressure

What is adsorption chromatography? Write its types.

$A$ liquid contains a non-volatile impurity. Which technique will be applied for its purification?

Which of the following statements are correct?
$A$. Glycerol is purified by vacuum distillation because it decomposes at its normal boiling point.
$B$. Aniline is purified by steam distillation as it is immiscible in water.
$C$. Ethanol can be separated from an ethanol-water mixture by azeotropic distillation because it forms an azeotrope.
$D$. An organic compound is pure if the mixed $M.P.$ remains the same.
Choose the most appropriate answer from the options given below:

What is column chromatography?