In chromatography, which of the following statements is incorrect for Rf ?

Question

In chromatography, which of the following statements is incorrect for Rf ? (A) Rf value depends on the type of chromatography (B) Higher Rf value means higher adsorption (C) Rf value is dependent on the mobile phase (D) The value of Rf can not be more than one

Tardigrade Admin · Accepted Answer

In chromatography, the expression of retention factor

(R_{f})

is

R_{f} = \frac{Distance travelled by the compound from origin}{Distance travelled by the solvent from origin} < 1

The value of

R_{f}

signifies the relative ratio of migration of each component of the mixture with respect to the developing solvent used.

R_{f}

value depends on the type of adsorption chromatography like TLC (Thin-Layer Chromatography), paper chromatography etc. The

R_{f}

value is also the characteristic of a compound (sample) for a given developing solvent at a given temperature.
When the compound in the sample (usually less polar) is weakly adsorbed the spot will travel a shorter distance from the origin and hence the

R_{f}

value will be decreased.

Q. In chromatography, which of the following statements is incorrect for $R_{f}$ ?

$R_{f}$ value depends on the type of chromatography

Higher $R_{f}$ value means higher adsorption

$R_{f}$ value is dependent on the mobile phase

The value of $R_{f}$ can not be more than one

Q. In chromatography, which of the following statements is incorrect for Rf​ ?

Rf​ value depends on the type of chromatography

Higher Rf​ value means higher adsorption

Rf​ value is dependent on the mobile phase

The value of Rf​ can not be more than one

Q. In chromatography, which of the following statements is incorrect for $R_{f}$ ?

$R_{f}$ value depends on the type of chromatography

Higher $R_{f}$ value means higher adsorption

$R_{f}$ value is dependent on the mobile phase

The value of $R_{f}$ can not be more than one