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

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

Which method is used to separate glycerol from spent lye in the soap industry?

What criterion is followed for the selection of the stationary phase in chromatography?

The mixture of compounds $A$ and $B$ is passed through a column of $Al_2O_3$ by using alcohol as eluant. Compound $A$ is eluted in preference to compound $B$. Which of the compounds $A$ or $B$ is more readily adsorbed on the column?

Which of the following compounds is used as an adsorbent in column chromatography?