Adsorption — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Adsorption.

Integrated conceptual questions on physisorption vs. chemisorption

high

This is a core distinction and fundamental to understanding adsorption. NEET frequently tests these differences. Future questions might involve scenarios where a student needs to identify the type of adsorption based on given experimental observations (e.g., 'A gas adsorbs on a surface with an enthalpy change of -30 kJ/mol and forms multiple layers. What type of adsorption is this?'). This requires not just recall but application of multiple characteristics simultaneously.

Application-based questions with a slightly novel context

medium

While common applications like gas masks are well-known, NEET might introduce slightly less common but still relevant applications, or ask students to deduce the role of adsorption in a described process. For example, questions related to environmental remediation (e.g., removal of pollutants from water using adsorbents) or advanced material science (e.g., adsorption in MOFs - Metal-Organic Frameworks) could appear, requiring students to apply their understanding of adsorption principles to new contexts.

Graphical interpretation of Freundlich isotherm at different pressure ranges

medium

The logarithmic form of the Freundlich isotherm is standard. However, questions could delve into the behavior of the isotherm at very low and very high pressures, where the empirical Freundlich equation deviates from reality or simplifies. For instance, asking about the slope of the $\log(x/m)$ vs. $\log P$ plot at extremely high pressures (approaching zero) or very low pressures (approaching one), or comparing it with Langmuir isotherm behavior in these limits, would test deeper understanding.