What is the principle of extraction in a separatory funnel?

Explain why an organic liquid vaporises at a temperature below its boiling point during steam distillation.

$A$ mixture of dichloromethane and aniline can be separated by

Thin-layer chromatography is an example of

Using the provided information in the following paper chromatogram,calculate the $R_{f}$ value of $A$ .......... $\times 10^{-1}$.

Fill in the blanks:
$1$. In differential extraction from two layers,the .......... layer is above because .............
$2$. The organic solvent used in differential extraction is .......... in water.
$3$. If an organic compound is ......... soluble in an organic solvent,then the continuous extraction technique is used.
$4$. ........ solution is added to produce the precipitate of halide for the estimation of halogen.