Which of the following is not a favourable condition for physical adsorption?

Why is the adsorption of a gas on a solid exothermic?

What is the value of the slope in the Freundlich adsorption isotherm plot of $\log \frac{x}{m}$ against $\log C$?

Why is adsorption always exothermic?

Which one of the following is correct for the adsorption of a gas at a given temperature on a solid surface?

Which statements among the following are correct?
$(i)$ Freundlich isotherm fails at high pressure of the gas.
$(ii)$ $\Delta H < 0$ for both physical and chemical adsorption.
$(iii)$ Physical adsorption is non-selective.
$(iv)$ Chemical adsorption is reversible,whereas physical adsorption is irreversible.