Chemistry - Environmental Chemistry Question with Solution | TestHub

Explanation:

The question asks to identify which of the listed pollutants do not contribute to the chemical process of destroying the stratospheric ozone layer ( ${\mathrm{O}}_3$ ).

Concept:

This is based on the ozone layer depletion pollutants (CFCs).

Solution:

Freons (Chlorofluorocarbons or CFCs) are the primary class of pollutants responsible for ozone

depletion. They release chlorine atoms in the stratosphere, which catalyze the destruction of O₃

O₂ (Sulfur dioxide) and CO₂ (Carbon dioxide) are major air pollutants, primarily contributing to acid rain and the greenhouse effect (global warming), respectively, but they are generally not considered direct ozone-depleting substances.

DDT (Dichlorodiphenyltrichloroethane) is an insecticide known for causing water and soil pollution and environmental toxicity, but it does not cause ozone layer depletion.

Therefore, SO₂ , DDT, and CO₂ are the pollutants that are not responsible for ozone layer depletion.