Liquefaction of Gases — Predicted 2026

AI-Predicted Question Angles for UPSC 2026

Based on trend analysis, current affairs, and recurring themes in Liquefaction of Gases.

Application of van der Waals constants to predict liquefaction ease.

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While direct calculations are rare, NEET might present scenarios where students need to infer the ease of liquefaction based on given 'a' and 'b' values, without necessarily calculating $T_c$ or $P_c$. For example, 'Gas X has a higher 'a' value and lower 'b' value than Gas Y. Which is easier to liquefy?' This tests the conceptual link between van der Waals constants and critical properties.

Integrated questions combining real gas behavior with liquefaction.

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NEET often combines related concepts. A question might present a scenario where a gas deviates from ideal behavior and then ask about its liquefaction potential. For instance, 'At what conditions (high P, low T) does a real gas show maximum deviation from ideal behavior, and how does this relate to its liquefaction?' This tests the understanding that conditions favoring deviation (strong intermolecular forces, small volume) also favor liquefaction.

Comparative analysis of different liquefaction methods.

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While the Joule-Thomson effect is covered, detailed knowledge of specific liquefaction processes like Linde's or Claude's cycle is generally beyond NEET scope. However, a conceptual question comparing the basic principles of different methods (e.g., cooling vs. compression) or their applicability to different gases could be asked, focusing on the underlying physical principles rather than engineering details.