Give any four differences between Physisorption and Chemisorption.

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Solution

Physisorption Chemisorption
It involves physical or van der Waals forces between the particles of adsorbate and adsorbent.
It involves chemical bonds (covalent bonds) between adsorbate and adsorbent particles.
It has low heat of adsorption (20 to 40 kJ/mol)
It has high heat of adsorption (40 to 200 kJ/mol)
It is relatively weak.
It is relatively strong.
Adsorption is multilayer.
Adsorption is monolayer.

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Physisorption	Chemisorption
It involves physical or van der Waals forces between the particles of adsorbate and adsorbent.	It involves chemical bonds (covalent bonds) between adsorbate and adsorbent particles.
It has low heat of adsorption (20 to 40 kJ/mol)	It has high heat of adsorption (40 to 200 kJ/mol)
It is relatively weak.	It is relatively strong.
Adsorption is multilayer.	Adsorption is monolayer.