Which purification method is used to separate a volatile liquid from non-volatile impurities?

Glycerol is separated in soap industries by

Give the difference between paper chromatography and thin layer chromatography.

Explain partition chromatography. What is partition chromatography? Describe paper chromatography.

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.

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.