Given below are two statements:Statement-I: R | vedclass

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(C) $R_f$ (Retardation factor) is defined as the ratio of the distance travelled by the substance to the distance travelled by the solvent front from

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Both statement-$I$ and statement-$II$ are false.

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(C) $R_f$ (Retardation factor) is defined as the ratio of the distance travelled by the substance to the distance travelled by the solvent front from the reference line.$R_f = \frac{	ext{Distance travelled by the substance from reference line (cm)}}{	ext{Distance travelled by the solvent from reference line (cm)}}$Since $R_f$ is a ratio of two identical units (length),it is a dimensionless quantity. Thus,Statement-$I$ is false.The $R_f$ value of a compound depends on the nature of the solvent and the stationary phase used. Therefore,it is not constant for all solvents. Thus,Statement-$II$ is false.

List-$I$ (Separation of)	List-$II$ (Separation Technique)
$A$. Aniline from aniline$-water$ mixture	$I$. Simple distillation
$B$. Glycerol from spent$-lye$ in soap industry	$II$. Fractional distillation
$C$. Different fractions of crude oil in petroleum industry	$III$. Distillation at reduced pressure
$D$. Chloroform$-Aniline$ mixture	$IV$. Steam distillation

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

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