Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2022ChemistrySurface Chemistry

The correct condition for physical adsorption is

Options

  1. AHigh T and high p
  2. BHigh T and low p
  3. CLow T and high p
  4. DT and p do not affect

Correct answer

C. Low T and high p

Step-by-step solution

Physical adsorption is an exothermic process, which can be represented by the equilibrium: Adsorbate + Adsorbent Adsorbed state + Heat. According to Le Chatelier principle, for an exothermic process, a decrease in temperature favors the forward reaction, leading to increased adsorption. Furthermore, increasing the pressure of the gas increases the concentration of gas molecules on the surface of the adsorbent, which also promotes physical adsorption. Therefore, physical adsorption is favored by low temperature and

Practice Surface Chemistry on Quantrex Academy →

More from Surface Chemistry

Which of the following nanomaterials has one dimension < 100 nm? 2026Identify the term used to describe movement of colloidal particles under applied electric potential without using semipermeable membrane. 2026Which of the following ranges of particle size defines nano scale ? 2026Which of following forces is responsible for physisorption ? 2026Which of the following properties of colloid is used to measure the rate of migration of sol particles? 2026Which of the following is an example of macromolecular colloid? 2026Which from following anions has greater power for coagulation of positive sol? 2026Which from following is NOT an example of oil in water emulsion? 2026 Full Surface Chemistry list All COMEDK PYQs