The Langmuir adsorption isotherm is deduced using the assumption that:

  • A
    the adsorption sites are equivalent in their ability to adsorb the particles
  • B
    the heat of adsorption varies with coverage
  • C
    the adsorbed molecules interact with each other
  • D
    the adsorption takes place in multilayers

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Which one of the following characteristics is not correct for physical adsorption?

Give information about the Freundlich adsorption isotherm.

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Which plot is the adsorption isobar for chemisorption where $x$ is the amount of gas adsorbed on mass $m$ at temperature $T$?

Choose the correct statement for chemical adsorption.

The number of incorrect statement/s from the following is/are:
$A.$ Water vapours are adsorbed by anhydrous calcium chloride.
$B.$ There is a decrease in surface energy during adsorption.
$C.$ As the adsorption proceeds,$\Delta H$ becomes more and more negative.
$D.$ Adsorption is accompanied by decrease in entropy of the system.

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