JEE Main 2023 — Surface Chemistry Question with Solution
From: JEE Main 2023 (Online) 12th April Morning Shift
Question
Four gases A, B, C and D have critical temperatures and respectively. For their adsorption on a fixed amount of charcoal, the correct order is:
Choose an option
Show full solutionCorrect option: A
Step-by-step explanation
The extent of adsorption of a gas on a solid surface depends on the critical temperature of the gas and the temperature of the solid surface. The critical temperature is the temperature above which a gas cannot be liquefied, no matter how much pressure is applied. Therefore, gases with higher critical temperatures are less likely to be adsorbed on a solid surface than gases with lower critical temperatures.
In this case, the gases are A, B, C, and D, with critical temperatures of 5.3 K, 33.2 K, 126.0 K, and 154.3 K, respectively. Therefore, the correct order of adsorption on a fixed amount of charcoal is:
D > C > B > A
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This is a previous-year question from JEE Main 2023, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.