Which of the following statements regarding adsorption is not true?

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The phenomenon of adsorption implies the presence of excess concentration of adsorbate at the surface of adsorbent

The phenomenon of adsorption is due to the presence of residual forces at the surface of the body

During adsorption, there occurs a decrease in free energy of the system

During adsorption, there occurs an increase in entropy of the system

answer is D.

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Detailed Solution

The characteristics of the adsorbent and the adsorbate determine the extent of adsorption.
Adsorption in the phase of solution:
Solutes from solutions can also be adsorption by solids.
For instance, when the acetic acid solution is agitated with charcoal in it, some of the acetic acid gets adsorbed on the charcoal, which causes the concentration of acetic acid in the solution to decrease.

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