Factors Affecting Adsorption — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

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

Combined effect of multiple factors

high

NEET often moves towards more integrated questions. A question might present a scenario where both temperature and pressure are changed, or ask to compare adsorption of two different gases on two different adsorbents. For example, 'Which gas (A or B) would adsorb more on adsorbent X at high temperature and low pressure?' This requires applying knowledge of critical temperature, temperature effect, and pressure effect simultaneously. Students need to be able to synthesize information about multiple factors.

Graphical interpretation of adsorption vs. temperature/pressure

medium

While adsorption isotherms (Freundlich, Langmuir) are covered separately, questions might present a simple graph showing the amount adsorbed versus temperature or pressure and ask for an interpretation. For instance, a graph showing decreasing adsorption with increasing temperature would test the understanding of the exothermic nature of adsorption and Le Chatelier's principle. This tests visual data interpretation alongside conceptual knowledge.

Role of pH in adsorption from solutions (conceptual)

medium

While less common than gas adsorption, the effect of pH on adsorption from solutions is a distinct factor. Questions could explore how changing pH affects the surface charge of an adsorbent (e.g., metal oxides) or the speciation of an adsorbate (e.g., weak acids/bases), thereby influencing adsorption. This tests a slightly more advanced conceptual understanding relevant to environmental chemistry applications.