Which of the following is $NOT$ a characteristic of physical adsorption?

If $x$ gram of gas is adsorbed by $m$ gram of adsorbent at pressure $P$,the plot of $\log \frac{x}{m}$ versus $\log P$ is linear. The slope of the plot is: ($n$ and $k$ are constants and $n > 1$ )

Which of the following is true for the adsorption of a gas on the surface of a solid?

Which one of the following statements is not correct?

Which of the following becomes less than zero during the process of adsorption?

The number of incorrect statement/s from the following is/are:
$A.$ Water vapours are adsorbed by anhydrous calcium chloride.
$B.$ There is a decrease in surface energy during adsorption.
$C.$ As the adsorption proceeds,$\Delta H$ becomes more and more negative.
$D.$ Adsorption is accompanied by decrease in entropy of the system.