Answer: increases and then decreases.
- A decreases continuously
- B increases and then decreases
- C remains constant throughout
- D becomes zero at once
Correct answer: B. increases and then decreases
Explanation: Chemisorption needs activation energy, so it initially rises with temperature and then falls at higher temperature.
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.