Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Most Important Selected Qs for JEE AdvancedChemistrySurface Chemistry

Which of the following statements are correct:

Options

  1. AThe flocculating value of PO ₄³⁻ is less than that of SO ₄²⁻ .
  2. BCharcoal adsorbs gases with higher critical temperature more than gases with lower critical temperature.
  3. CChemisorption is multilayered.
  4. DIn the manufacture of NH ₃ by Haber's process, molybdenum is used as promoter for the catalyst iron.

Correct answer

D. In the manufacture of NH ₃ by Haber's process, molybdenum is used as promoter for the catalyst iron.

Step-by-step solution

Chemisorption unimolecular layer

Practice Surface Chemistry on Quantrex Academy →

More from Surface Chemistry

At a given temperature, 0.45 g of acetic acid in 50 mL of water is shaken with 1.0 g of charcoal and the pH of the resulting solution is 3.0 . Assume, the adsorption of acetic acid 2026Adsorption of phenol from its aqueous solution on to fly ash obeys Freundlich isotherm. At a given temperature, from 10 mg g ⁻¹ and 16 mg g ⁻¹ aqueous phenol solutions, the concent 2025Consider the following statements related to colloids. (I) Lyophobic colloids are not formed by simple mixing of dispersed phase and dispersion medium. (II) For emulsions, both the 202320 mL of 0 . 5 M NaCl is required to coagulate 200 mL of As 2 S 3 solution in 2 hours. The coagulating value of NaCl is ___________. 2023Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R. Assertion A : The diameter of colloidal particles in solution should not be mu 2023What happens when a lyophilic sol is added to a lyophobic sol? 2023Four gases, A , B , C and D have critical temperatures 5 . 3 , 33 . 2 , 126 . 0 and 154 . 3 K respectively For their adsorption on a fixed amount of charcoal, the correct order is 2023The number of correct statements about modern adsorption theory of heterogeneous catalysis from the following is ...... A. The catalyst is diffused over the surface of reactants. B 2023 Full Surface Chemistry list All Most Important Selected Qs for JEE Advanced PYQs