Gas masks containing activated charcoal to remove poisonous gases from the atmosphere act on the principle of:

The graph of $\log \frac{x}{m}$ vs $\log p$ for an adsorption process is a straight line inclined at an angle of $45^{\circ}$ with an intercept equal to $0.6020$. The mass of gas adsorbed per unit mass of adsorbent at the pressure of $0.4 \ atm$ is $......... \times 10^{-1}$ (Nearest integer). Given: $\log 2 = 0.3010$.

According to the Langmuir adsorption isotherm,which of the following plots is a straight line?

Which one of the following is not applicable to chemisorption?

If $x$ amount of gas is adsorbed on $m$ amount of adsorbent at pressure $p$,the Freundlich adsorption isotherm plot gives a straight line for which of the following?

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