Answer: iron with promoters.
- A platinum
- B iron with promoters
- C vanadium pentoxide
- D finely divided nickel
Correct answer: B. iron with promoters
Explanation: The Haber process uses finely divided iron with molybdenum or K₂O/Al₂O₃ promoters.
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.