What is the characteristic of $R_f$ value?

What is the principle of extraction in a separatory funnel?

The correct statements among the following,for a chromatography purification method is:

Match the type of mixture of compounds in Column-$I$ with the technique of separation/purification given in Column-$II$.

Column-$I$	Column-$II$
$A$. Two solids which have different solubilities in a solvent and which do not undergo reaction when dissolved in it	$1$. Crystallisation
$B$. Liquid that decomposes at its boiling point	$2$. Distillation under reduced pressure
$C$. Steam volatile liquid	$3$. Steam distillation
$D$. Two liquids which have boiling points close to each other	$4$. Fractional distillation
$E$. Two liquids with large difference in boiling points	$5$. Simple distillation

State whether the following statements regarding steam distillation at reduced pressure are True or False:
$i$. It is used in the soap industry.
$ii$. Water pumps,vacuum pumps,or air pumps are used.
$iii$. Liquids with high boiling points do not decompose.
$iv$. The liquid is decomposed.
$v$. The liquid is boiled at a low temperature.

Which of the following statements is correct for paper chromatography?