JEE Main 2003 Chemistry question

Which one of the following characteristics is not correct for physical adsorption?

(1)Adsorption increases with increase in temperatureCorrect
(2)Adsorption is spontaneous
(3)Both enthalpy and entropy of adsorption are negative
(4)Adsorption on solids is reversible

Answer: (1)

Solution

Physical adsorption is exothermic, so by Le Chatelier's principle it decreases with increasing temperature; statement (1) is not correct and is the answer. Physisorption is

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Question ID VK-038189