Which apparatus is used to reduce pressure in distillation under reduced pressure?

The correct match between Item $I$ and Item $II$ is

Item $I$	Item $II$
$a$. Benzaldehyde	$p$. Mobile phase
$b$. Alumina	$q$. Adsorbent
$c$. Acetonitrile	$r$. Adsorbate

Which technique is used for the separation of a compound present in an aqueous solution?

On a thin layer chromatographic plate,an organic compound moved by $3.5 \ cm$,while the solvent moved by $5 \ cm$. The retardation factor of the organic compound is . . . . . . $\times 10^{-1}$.

$A$ mixture of methyl alcohol and acetone can be separated by

In chromatography technique,the purification of a compound is independent of: