Answer: Accumulation of molecules on the surface of a solid or liquid.
- A Uniform distribution of a substance throughout a bulk material
- B Accumulation of molecules on the surface of a solid or liquid
- C Conversion of a liquid into a gas
- D Dissolving of a solid in a liquid
Correct answer: B. Accumulation of molecules on the surface of a solid or liquid
Explanation: Adsorption refers to molecules of a gas or liquid accumulating on the surface of an adsorbent, unlike absorption which is a bulk phenomenon.
A typical adsorption isotherm: x/m (mass adsorbed per gram of adsorbent) rises steeply at low pressure, then flattens into a saturation plateau as the adsorbent surface fills up.
Concept context
Explore the chemistry that happens at interfaces, from catalysts that speed up industrial reactions to colloids like milk, smoke, and gels that surround us every day.