Q. The ozone hole is most severe over Antarctica, partly due to the formation of polar stratospheric clouds (PSCs). In which one of the following ways does PSCs contribute to ozone depletion?
Answer: B
Notes:
Explanation – PSCs form during the extreme cold conditions in the polar regions, particularly in Antarctica. These clouds contain ice crystals that provide a surface for the chemical reactions that convert inert chlorine-containing compounds, such as chlorofluorocarbons (CFCs), into more reactive forms. The reactive forms of chlorine can then catalyze the breakdown of ozone molecules, contributing to the ozone hole over Antarctica.
Source: The Hindu
