A-LevelChemistryReaction kinetics9701/12 · Oct/Nov 2025 · Q141 Mark
20.0 cm³ of hydrogen peroxide decomposes to water and oxygen in the presence of a suitable catalyst. 160 cm³ of oxygen, measured at room conditions, is produced in 5.00 minutes. What is the average rate of decomposition of hydrogen peroxide during this reaction period?
A2.22 x 10⁻⁵ mol s⁻¹
B4.44 × 10⁻⁵ mol s⁻¹
C1.76 x 10⁻⁴ mol s⁻¹
D2.67 x 10⁻³ mol s⁻¹
✓ Correct answer
B: 4.44 × 10⁻⁵ mol s⁻¹
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Reaction kinetics and see which topics are most likely to come up next.
Sign up free →