JEE Main Chemistry question
Not in JEE Main or NEET syllabus
How many of the following represent a surface phenomenon? Adsorption, Surface tension, Surface energy, Viscosity, Absorption, Dissolution of soap in water, Silica gel adsorbing moisture in the presence of moisture.
Answer: 5
Solution
Adsorption, surface tension and surface energy are, by definition, phenomena confined to the surface/interface. Dissolution of soap in water lowers surface tension through adsorption of surfactant molecules at the air-water interface, and silica gel taking up atmospheric moisture is itself an adsorption process — both
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