Give the difference between paper chromatography and thin layer chromatography.

Which one of the following methods is suitable to separate a mixture of $n$-pentane and toluene?

Which are the methods of purification of organic compounds?

Three organic compounds $A$,$B$ and $C$ were allowed to run in thin layer chromatography using hexane and gave the following result (see figure). The $R_f$ value of the most polar compound is $............\, \times 10^{-2}$

$X$ and $Y$ have $R_f$ values of $0.75$ and $0.25$ respectively. In column chromatography,which component is obtained first?

Fill in the Blanks :
$(1)$ The steam distillation of $.......$ liquid is done and it is boiled at $.........$ temperature.
$(2)$ $.........$ and $........$ used to reduce pressure in distillation under reduced pressure.
$(3)$ In steam distillation the equation of total vapour pressure is $P = p_1 + p_2$ where $p_1$ is more than $...........$
$(4)$ $.........$ apparatus is used in differential extraction.