Answer: An electric field.
- A A magnetic field
- B An electric field
- C Gravity alone
- D Surface tension
Correct answer: B. An electric field
Explanation: Electrophoresis is the movement of charged colloidal particles toward an oppositely charged electrode when an electric field is applied.
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.