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Which is not correct regarding the adsorption of a gas on surface of solid?

1. On increasing temperature, adsorption increases continuously
2. Enthalpy and entropy changes are negative
3. Adsorption is more for some specific substances
4. This phenomenon is reversible

Correct answer: On increasing temperature, adsorption increases continuously

Solution

Adsorption generally decreases with an increase in temperature because it is an exothermic process, and higher temperatures favor desorption according to Le Chatelier's principle.

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