Which of the following terms indicates concentration of molecules at the surface of a solid or liquid?

Question

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Adsorption refers to the concentration of molecules or particles at the surface of a solid or liquid. This can include physical adsorption (where the molecules are held by van der Waal forces) or chemisorption (where the molecules are bound by chemical bonds). Corrosion refers to the degradation of a material due to chemical reactions with its environment. Hydrophilic refers to a substance that has an affinity for water, while absorption refers to the uptake of a substance into another material (e.g. the absorption of a liquid into a sponge).

Which of the Following Terms Indicates Concentration of Molecules at the Surface