Environmentalhard · Past Paper
Which of the following chemical groups is most effective at destroying the ozone layer?
ANoble gases
BHalogens (like Chlorine and Bromine)
CAlkali metals
DLanthanides
✓ Correct Answer: B — Halogens (like Chlorine and Bromine)
Halogens act as catalysts in the stratosphere, where one chlorine atom can destroy thousands of ozone molecules.
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