Q.

Which of the following is incorrect?

Moderate

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By Expert Faculty of Sri Chaitanya

Enthalpy (numerical value) of physisorption is greater than that of chemisorption

Physisorption is not very specific but chemisorption is highly specific

Chemisorption takes place at relatively high temperatures

In physisorption generally multi-molecular layers are formed on the adsorption

answer is A.

(Detailed Solution Below)

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Detailed Solution

Physisorption has a lower enthalpy (numerical value) than chemisorption. Vander Waals forces and other weak attraction forces cause physisorption, whereas specific strong forces cause chemisorption, which results in high enthalpy and high temperature reactions.

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