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

What is a chromatogram?

Explain differential extraction.

On which principle does the solute move on chromatography paper?

Among the following,in which type of chromatography,both stationary and mobile phases are in liquid state?

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 | $12.5$ |