NEET 2007 Chemistry question

Not in JEE Main or NEET syllabus

The Langmuir adsorption isotherm is deduced using the assumption

(1)The adsorbed molecules interact with each other
(2)The adsorption takes place in multilayers
(3)The adsorption sites are equivalent in their ability to adsorb the particlesCorrect
(4)The heat of adsorption varies with coverage

Answer: (3)

Solution

Langmuir's isotherm assumes that (a) adsorption is limited to a monolayer, (b) all adsorption sites are identical (equivalent in their ability to adsorb), (c) there is no interaction between adsorbed molecules, so adsorption at one site is independent of adjacent sites, and

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Question ID VK-089848