Ozone depletion and CFCs Quiz
Studying this course? Keep your progress in one place.
Pick an answer for each. Quizzes never use energy.
5 questions, one answer each
Each answer is checked as you go, with why.
See all 5 questions
1. What is the main benefit of ozone in the upper atmosphere?
- A. It absorbs ultraviolet radiation
- B. It absorbs infrared radiation
- C. It destroys CFCs
- D. It provides oxygen to breathe
2. Which bond in a CFC is broken by ultraviolet radiation in the upper atmosphere?
- A. C–F
- B. C–Cl
- C. C–C
- D. C–H
3. Which equation represents a step in the catalytic decomposition of ozone by chlorine atoms?
- A. Cl· + O₂ → ClO·
- B. Cl₂ + O₃ → 2ClO
- C. O₃ → O₂ + Cl·
- D. ClO· + O₃ → 2O₂ + Cl·
4. Why does one chlorine atom destroy many ozone molecules?
- A. It is converted into oxygen
- B. It forms ozone each time
- C. It is regenerated in the cycle, acting as a catalyst
- D. It is a stable molecule
5. A new refrigerant contains only carbon, hydrogen and fluorine. Why is it less harmful to the ozone layer than a CFC?
- A. It contains no chlorine, so no chlorine atoms are formed
- B. It reacts with ozone faster
- C. It is more soluble in water
- D. It absorbs more UV radiation