Which one of the following mixtures can be separated by steam distillation technique?

Which method is used to separate a mixture of aniline and water?

Give the information of the following in short.
$(i)$ Fractional column $(ii)$ Theoretical plate $(iii)$ Mechanism of fractional column.

$A$ liquid contains a non-volatile impurity. Which technique will be applied for its purification?

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 | $12.5$ |

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.