Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Advanced2015ChemistrySurface ChemistryActual

When O 2 is adsorbed on a metallic surface, electron transfer occurs from the metal to O 2 . The TRUE statement(s) regarding this adsorption is(are)

Options

  1. AO 2 is physisorbed
  2. BHeat is released
  3. COccupancy of π 2 p * of O 2 is increased
  4. DBond length of O 2 is increased

Correct answer

B. Heat is released

Step-by-step solution

It is a chemisorption Δ H is - v e for adsorption. Due to electron intake in O 2 molecule π 2 p x * or π 2 p y * (ABMO) will gain electrons and bond order of O 2 molecule (Adsorbed) will decrease and bond length increased.

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 JEE Advanced PYQs