Which two organic compounds are purified by the sublimation technique?

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?

$A$ liquid compound $(x)$ can be purified by steam distillation only if it is

Using the given figure,the ratio of $R_f$ values of sample $A$ and sample $C$ is $x \times 10^{-2}$. The value of $x$ is . . . . . . . .
Table: Paper chromatography of Samples
| Component | Distance from base line (cm) |
| :--- | :--- |
| Sample $A$ | $5.0$ |
| Sample $B$ | $6.5$ |
| Sample $C$ | $10.0$ |
| Solvent front | $12.5$ |

In the given $TLC$ plate,the distances of spots $A$ and $B$ from the base line are $4 \ cm$ and $6 \ cm$,respectively. The distance moved by the solvent front from the base line is $8 \ cm$. If the $R_f$ value of $B$ is $x \times 10^{-1}$ times that of $A$,find the value of $x$.

On a thin layer chromatographic plate,an organic compound moved by $3.5 \ cm$,while the solvent moved by $5 \ cm$. The retardation factor of the organic compound is . . . . . . $\times 10^{-1}$.