EPA 608 Core · Ozone Depletion · Hard
How does chlorine destroy ozone?
Answer: B. It strips an oxygen atom from ozone.
- AIt dissolves the ozone into a liquid.
- BIt strips an oxygen atom from ozone.✓ Correct
- CIt blocks the UV light needed to create ozone.
- DIt binds with nitrogen to displace ozone.
Why B is right
Chlorine reacts with ozone (O3), stealing an oxygen atom to form ClO and leaving O2 behind.
More Core questions
- What makes HFC refrigerants harmful to the environment?
- Which metric compares a gas's global warming impact to carbon dioxide?
- Why can CFCs released at ground level damage the ozone layer?
- R-410A has a GWP of about 2,088. What does that mean?
- What is the Ozone Depletion Potential (ODP) of HFC refrigerants such as R-134a and R-410A?
Go deeper with the study guide EPA 608 Core Exam: Study Guide for 2026, try the free 10-question test or browse all EPA 608 practice questions.
A practice question written for study, checked against 40 CFR Part 82, Subpart F. It is not an official EPA exam question, and this site is not affiliated with the U.S. EPA.