JAMB Chemistry 2016 Paper

Concept:Chlorofluorocarbons (CFCs) release chlorine atoms that destroy ozone molecules.Explanation:CFCs are stable compounds that rise to the stratosphere, where ultraviolet radiation releases chlorine atoms.These chlorine atoms catalytically break down ozone ($\mathrm{O}_3$) into oxygen ($\mathrm{O}_2$), depleting the ozone layer.Nitrogen dioxide ($\mathrm{NO}_2$), sulfur dioxide ($\mathrm{SO}_2$), and carbon monoxide ($\mathrm{CO}$) are major air pollutants but are not the primary cause of ozone layer depletion.Answer:A. CFCs