Which of the following can adsorb the largest volume of hydrogen gas?

The graph drawn between $\log \left(\frac{x}{m}\right)$ and $\log (p)$ is shown below with intercept $OA = 0.3010$. What is the value of $\left(\frac{x}{m}\right)$ at a pressure of $0.3 \ atm$ ? (Given: $\log 2 = 0.3010, \log 3 = 0.477$)

Which one of the following graphs represents the Freundlich adsorption isotherm?

What is the number of molecular layers on the adsorbent in chemical adsorption?

Which of the following statements regarding adsorption is incorrect?

$A$ plot of $\log (x/m)$ versus $\log p$ for the adsorption of a gas on a solid gives a straight line with slope equal to