Answer: vanadium pentoxide.
- A iron filings
- B vanadium pentoxide
- C platinum sponge
- D manganese dioxide
Correct answer: B. vanadium pentoxide
Explanation: V₂O₅ catalyses the oxidation of SO₂ to SO₃ in the Contact process.
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.