Identify physisorption from the following.

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(D) Physisorption (physical adsorption) is characterized by weak van der Waals forces between the adsorbate and the adsorbent. It is non-specific in n

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All gases deposited on charcoal

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(D) Physisorption (physical adsorption) is characterized by weak van der Waals forces between the adsorbate and the adsorbent. It is non-specific in nature. Chemisorption involves strong chemical bonds and is highly specific. $O_2$ on tungsten,$H_2$ on nickel,and $N_2$ on iron involve chemical bond formation (chemisorption). Adsorption of gases on charcoal is a classic example of physisorption due to weak van der Waals forces.

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