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

For the adsorption of hydrogen on platinum,the activation energy is $30 \ kJ \ mol^{-1}$ and for the adsorption of hydrogen on nickel,the activation energy is $41.4 \ kJ \ mol^{-1}$. The logarithm of the ratio of the rates of chemisorption on equal areas of the metals at $300 \ K$ is $........$ (Nearest integer). Given: $\ln 10 = 2.3$,$R = 8.3 \ J \ K^{-1} \ mol^{-1}$.

When is the term 'sorption' used?

What is an adsorption isotherm? Describe Freundlich adsorption isotherm.

Which substance is used as an adsorbent in chromatography?

Which of the following statements is true for adsorption?