Given below are two statements:
Statement-I: Retardation factor ($$R_f$$) can be measured in meter/centimetre.
Statement-II: $$R_f$$ value of a compound remains constant in all solvents.
Choose the most appropriate answer from the options given below:

Let us analyze both statements about the retardation factor ($$R_f$$) in chromatography.

Statement-I claims that $$R_f$$ can be measured in meter/centimetre. The retardation factor is defined as $$R_f = \frac{\text{Distance moved by solute}}{\text{Distance moved by solvent front}}$$. Since it is a ratio of two distances, it is a dimensionless quantity with no units. Therefore, Statement-I is false.

Statement-II claims that the $$R_f$$ value of a compound remains constant in all solvents. This is also false because the $$R_f$$ value depends on the nature of the solvent (mobile phase), the adsorbent (stationary phase), the thickness of the layer, and the temperature. Changing the solvent will change the $$R_f$$ value of a compound.

Since both statements are false, the correct answer is option (C): Both Statement-I and Statement-II are false.