MolSynapsequestion bank
MolSynapse / Question bank / Surface Chemistry / Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms
NEET levelSingle correct optionDifficulty 1 of 3sc010

Which of the following is NOT an assumption of the Langmuir adsorption isotherm?

  1. AAdsorption is limited to a single layer of molecules
  2. BAdsorbed molecules attract each other strongly and build up further layers
  3. CAll adsorption sites on the surface are equivalent
  4. DThere is no interaction between adjacent adsorbed molecules

Answer: B

Langmuir assumed a monolayer, identical sites and no lateral interaction between adsorbed molecules. Strong attraction leading to multilayers contradicts these assumptions.
Practice Surface Chemistry More on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms

More questions on Adsorption: physisorption vs chemisorption, Freundlich and Langmuir isotherms