Acid Rain and Ozone Layer Depletion — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Acid Rain and Ozone Layer Depletion.

Integrated effects of acid rain and other pollutants

medium

NEET is increasingly moving towards integrated questions. Instead of just asking about acid rain, a question might link $ ext{SO}_2$ and $ ext{NO}_x$ emissions to both acid rain and particulate matter pollution, or even their role in tropospheric ozone formation. Students might be asked to identify a pollutant that contributes to multiple environmental problems, requiring a broader understanding of atmospheric chemistry and interconnections between pollution types.

Specific chemical reactions and intermediates in ozone depletion

high

While the general catalytic cycle is known, questions could delve into specific intermediates like $ ext{ClO} cdot$ or the role of $ ext{NO}_x$ in both forming and destroying ozone (e.g., $ ext{NO} cdot$ reacting with $ ext{O}_3$). Understanding the precise steps and the regeneration of the catalyst is crucial. Questions might also focus on the activation of chlorine reservoirs on PSCs, requiring knowledge of specific reactions like $ ext{HCl} + ext{ClONO}_2 o ext{Cl}_2 + ext{HNO}_3$.

Comparative analysis of different ODS and their ozone depletion potential (ODP)

medium

Beyond just identifying ODS, NEET could ask about the relative effectiveness of different ODS (e.g., bromine vs. chlorine, or different CFCs) in depleting ozone. While not requiring exact ODP values, understanding that bromine-containing compounds are generally more potent, or that different CFCs have varying lifetimes and chlorine content, could be tested conceptually. This would require a slightly deeper understanding of the properties of ODS.