JEE Main Chemistry question

Not in JEE Main or NEET syllabus

According to Langmuir's adsorption isotherm, the amount of gas adsorbed at very high pressure:

(A)Reaches a constant limiting valueCorrect
(B)Goes on increasing with pressure
(C)Goes on decreasing with pressure
(D)Increases first and decreases later with pressure

Answer: (A)

Solution

Langmuir's model treats adsorption as restricted to a single layer; as pressure increases, more and more of the finite number of surface sites get occupied until the surface becomes completely

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Question ID VK-145015