Which one of the following statements is not correct?

For Freundlich adsorption isotherm,a plot of $\log (x / m)$ ($y$-axis) and $\log p$ ($x$-axis) gives a straight line. The intercept and slope for the line is $0.4771$ and $2,$ respectively. The mass of gas,adsorbed per gram of adsorbent if the initial pressure is $0.04 \ atm,$ is $........\times 10^{-4} \ g$.
$(\log 3 = 0.4771)$

Which of the following statements is correct for the spontaneous adsorption of a gas on a solid surface?

The spontaneous adsorption of a gas on the surface of a solid adsorbent is an exothermic process because...

Assertion $(A)$: van der Waals' forces are responsible for chemisorption.
Reason $(R)$: High temperature is favourable for chemisorption.
The correct answer is

Which of the following is zero during the process of adsorption?