In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen ?

1. Carbon

2. Fe

3. Cl

4. Oxygen

Doubtly Asked 30 Oct 2026 NEET UG 2018 neet Save WhatsApp Report

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Answer: 3. Cl

UV rays split chlorofluorocarbons and release chlorine atoms, which act as catalysts in converting ozone to molecular oxygen.

\(\mathrm{Cl + O_3 \rightarrow ClO + O_2}\); Cl is regenerated, so one atom destroys many ozone molecules.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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