What should be taken on the $Y$-axis in the Freundlich adsorption isotherm plot to obtain a straight line?

In the figure,a straight line is given for the Freundlich Adsorption isotherm equation $(y = mx + c)$,where the equation is $y = 0.3x + 0.7033$. The values of $\frac{1}{n}$ and $\log K$ are respectively:

The following graph is obtained for physisorption of a gas as a function of pressure at different temperatures. The correct order of the temperatures is:

When $O_{2}$ is adsorbed on a metallic surface,electron transfer occurs from the metal to $O_{2}$. The $TRUE$ statement$(s)$ regarding this adsorption is(are)
$(A)$ $O_{2}$ is physisorbed
$(B)$ heat is released
$(C)$ occupancy of $\pi_{2p}^{*}$ of $O_{2}$ is increased
$(D)$ bond length of $O_{2}$ is increased

Point out the wrong statement: Physical adsorption is characterized by

Why is chemisorption referred to as activated adsorption?