JEE Main 2019 — Chemistry solution

JEE Main2019Chemistry

In chromatography, which of the following statements is INCORRECT for R_f?

A
The value of R_fcannot be more than one.
B
Higher R_fvalue means higher adsorption.
C
R_fvalue is dependent on the mobile phase.
D
R_fvalue depends on the type of chromatography.

Solution

R_f represents retardation factor in chromatography.

$R_{f} = \frac{D i s tan ce m o v e d b y t h e s u b s tan ce f r o m ba se l in e}{D i s tan ce m o v e d b y t h e so l v e n t f r o m ba se l in e}$

– Higher R_fvalue means lower adsorpation

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