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(A) In $Physisorption$ (physical adsorption),the adsorbate molecules are held to the surface by weak $Van 	ext{ } der 	ext{ } Waals$ forces. Due to

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Physisorption

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(A) In $Physisorption$ (physical adsorption),the adsorbate molecules are held to the surface by weak $Van 	ext{ } der 	ext{ } Waals$ forces. Due to these weak forces,multiple layers of adsorbate can accumulate on the adsorbent surface,leading to the formation of a multimolecular layer. In contrast,$Chemisorption$ involves strong chemical bonds and is typically limited to the formation of a unimolecular layer.

Which type of adsorption leads to the formation of a multimolecular layer?

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Assertion $(A)$: van der Waals' forces are responsible for chemisorption.
Reason $(R)$: High temperature is favourable for chemisorption.
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Freshly prepared precipitate of $Fe(OH)_3$ is peptized by adding a solution of $FeCl_3$. The charge on the colloidal particles is due to the adsorption of ........

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