Multiple choice

In which of the following phenomena, a substance is released from or through a surface?

  1. Desorption

  2. Absorption

  3. Adsorption

  4. Sorption
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A Correct answer
Explanation

Desorption is a phenomenon whereby a substance is released from or through a surface. This occurs in a system being in the state of sorption equilibrium between bulk phase (fluid, i.e. gas or liquid solution) and an adsorbing surface (solid or boundary separating two fluids).

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