alleryA gas losing freedom of movement on adsorption shows a fall in:
AEntropy
BEnthalpy
CPressure
DDensity
Answer & Solution
Correct answer: A. Entropy
1. Free gas molecules move about the whole vessel.
2. Once adsorbed, their movement is restricted.
3. So the entropy of the gas decreases.
_Source: syllabus Chemistry Part I, Chapter 5, Surface Chemistry._
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