When $H_2S$ gas is passed through an arsenious oxide solution,an arsenious sulphide sol is formed. The charge on the particles is due to the adsorption of .......

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

The correct order of adsorption of the following gases on the surface of charcoal is: $H_2$ $(I)$,$CH_4$ $(II)$,$SO_2$ $(III)$.

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

$CO_{2}$ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal,the mass of $CO_{2}$ adsorbed becomes $64$ times when the pressure of $CO_{2}$ is doubled. The value of $n$ in the Freundlich isotherm equation is $......\,\times 10^{-2}$. (Round off to the Nearest Integer)

Which of the following statements is correct for chemisorption?