Which among the following is true for chemisorption?

  • A
    Heat of adsorption is in the range of $20-40 \ kJ \ mol^{-1}$
  • B
    It is multimolecular layered
  • C
    Van der Waals forces are involved
  • D
    It is favored at high temperature up to a certain limit

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The rate of physical adsorption:

Adsorption of a gas follows the Freundlich adsorption isotherm. In the given plot,$x$ is the mass of gas adsorbed on mass $m$ of the adsorbent at pressure $p$. $\frac{x}{m}$ is proportional to:

Statement $I$: Silica gel and alumina are used as adsorbents for adsorption chromatography.
Statement $II$: Paper chromatography is a type of partition chromatography.
In the light of the above statements,select the correct option.

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?

What are the factors which influence the adsorption of a gas on a solid?

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