JEE Main 2016ChemistrySurface ChemistryAdsorptioneasyMCQ

JEE Main 2016 — Surface Chemistry Question with Solution

From: JEE Main 2016 (Online) 9th April Morning Slot

Question

A particular adsorption process has the following characteristics : (i) It arises due to van der Waals forces and (ii) it is reversible. Identify the correct statement that describes the above adsorption process :

Choose an option

Show full solutionCorrect option: B
Correct answer
BEnergy of activation is low.

Step-by-step explanation

From the given characteristics, the adsorption is an example of physical adsorption.

(i) Physical adsorption is multimolecular layer.

(ii) It decreases with increase in temperature.

(iii) Enthalpy of adsorption is low 20–40 kJ mol−1 for physical adsorption.

(iv) Energy of activation is low because in this type of adsorption no chemical reaction takes place.

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About this question

This is a previous-year question from JEE Main 2016, covering the Surface Chemistry chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.