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Which of the following is an example of physical adsorption?
Option: 1
The formation of a rust layer on the surface of iron due to exposure to air and moisture.
Option: 2
The adsorption of hydrogen gas on a palladium catalyst.
Option: 3
The adsorption of a dye molecule on a fabric surface.
Option: 4
The adsorption of an enzyme on the surface of a solid support.
Answers (1)
The adsorption of hydrogen gas on a palladium catalyst is an example of physical adsorption because it occurs due to the weak van der Waals forces between the hydrogen molecules and the surface of the palladium catalyst. Option A represents a chemical process
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