Which of the following orders is correct?

The correct order of the volume of $NH_3, CO_2$,and $H_2$ gases adsorbed on $1 \ g$ of charcoal at $300 \ K$ is:

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.

The plot of $\log(\frac{x}{m})$ against $\log P$ is a straight line inclined at an angle of $45^{\circ}$. When the pressure is $0.5 \ atm$ and the Freundlich parameter $(K)$ is $10$,the amount of solute adsorbed per gram of adsorbent will be $(\log 5 = 0.699)$ .......... $g$.

Which among the following gases is adsorbed to a greater extent at similar conditions of temperature and pressure if the adsorbent remains same?

Which of the following curves is in accordance with the Freundlich adsorption isotherm?