Which of the following statements is not correct?

The Freundlich adsorption isotherm gives a straight line on plotting:

The graph of $\log \frac{x}{m}$ vs $\log p$ for an adsorption process is a straight line inclined at an angle of $45^{\circ}$ with an intercept equal to $0.6020$. The mass of gas adsorbed per unit mass of adsorbent at the pressure of $0.4 \ atm$ is $......... \times 10^{-1}$ (Nearest integer). Given: $\log 2 = 0.3010$.

$10 \ g$ of a gas is adsorbed on $500 \ g$ of solid at $10 \ bar$. If the pressure is increased to $20 \ bar$, $14 \ g$ of the gas is adsorbed by the same solid at the same temperature. What is the slope of Freundlich adsorption isotherm?

Which of the following is not correct about Freundlich adsorption isotherm?

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