This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 9 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Whether the gas has mass A) Yes. B) No. C) None of the above. D) Can't Predict. Show Answer Correct Answer: A) Yes. 2. At what pH range the rate of enzyme catalysed reaction is maximum? A) 5 to 7. B) 6 to 8. C) 7 to 9. D) 8 to 9. Show Answer Correct Answer: A) 5 to 7. 3. The term 'sorption' stands for ..... A) Absorption. B) Adsorption. C) Both absorption and adsorption. D) Desorption. Show Answer Correct Answer: C) Both absorption and adsorption. 4. What is the primary factor that influences the rate of adsorption? A) Color of the adsorbent. B) Shape of the adsorbate. C) Nature of the adsorbent surface. D) Size of the adsorbate molecules. Show Answer Correct Answer: C) Nature of the adsorbent surface. 5. What is the primary mechanism by which adsorption occurs? A) Surface interaction between adsorbate and adsorbent. B) Diffusion through a membrane. C) Condensation of gases. D) Evaporation of the adsorbate. Show Answer Correct Answer: A) Surface interaction between adsorbate and adsorbent. 6. What is the dispersed phase and dispersion medium of aersol? A) Gas, liquid. B) Liquid, liquid. C) Liquid, solid. D) Gas, solid. Show Answer Correct Answer: C) Liquid, solid. 7. Which one of the following is not applicable to the phenomenon of adsorption? A) $\Delta H>0$. B) $\Delta G<0$. C) $\Delta S<0$. D) $\Delta H<0$. Show Answer Correct Answer: A) $\Delta H>0$. 8. The type of colloidal dispersion obtained when egg protein is mixed with water A) Multimolecular Colloids. B) Macromolecular colloids. C) Associated colloids. D) Lyophilic colloids. Show Answer Correct Answer: B) Macromolecular colloids. 9. Majority of particles in water have negative charge A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 10. DETERGENTS WITH LOW CMC ARE MORE ECONOMICAL TO USE A) YES, MICELLE FORMED AT LOW CONC. B) NO, MICELLE FORMED AT LOW CONC. C) YES, MICELLE FORMED AT HIGH CONC. D) NO, MICELLE FORMED AT LOW CONC. Show Answer Correct Answer: A) YES, MICELLE FORMED AT LOW CONC. 11. Electro-osmosis is observed when: A) Dispersion medium particles begins to move in an electric field. B) Dispersed phase begins to move in an electric field. C) Both (a) and (b). D) One of the above. Show Answer Correct Answer: A) Dispersion medium particles begins to move in an electric field. 12. Foam is a colloidal system which consists of a dispersed phase and a dispersion medium. Indicate the dispersed phase and dispersion medium of foam, respectively. A) Liquid and liquid. B) Solid and gas. C) Liquid and solid. D) Gas and liquid. Show Answer Correct Answer: D) Gas and liquid. 13. The dispersal of a precipitated material into colloidal solution by the action of an electrolyte in solutionis called A) Coagulation. B) Dialysis. C) Peptization. D) Ultra-filtration. Show Answer Correct Answer: C) Peptization. 14. A colloidal system having a solid substance as a dispersed phase and a liquid as a dispersion medium is classified as ..... A) Solid solution. B) Gel. C) Emulsion. D) Solution. Show Answer Correct Answer: D) Solution. 15. Another name of permanent hardness A) Non-carbonate hardness. B) Carbonate hardness. C) Bicarbonate hardness. D) None of the above. Show Answer Correct Answer: A) Non-carbonate hardness. 16. Physical adsorption A) Increases with increase in temperature. B) Decreases with increase in temperature. C) Occurs readily at high temperature. D) None. Show Answer Correct Answer: B) Decreases with increase in temperature. 17. These are colloidal system that the dispersed phase is liquid, except ..... A) Milk. B) Soap foam. C) Margarine. D) Fog. Show Answer Correct Answer: B) Soap foam. 18. Extent of physisorption increases with A) Decrease in surface area. B) Increase in temperature. C) Decrease in temperature. D) Decrease in strength of van der waal forces. Show Answer Correct Answer: C) Decrease in temperature. 19. Lyophobic colloids are A) Irreversible. B) Water loving. C) Solvent loving. D) Reversible. Show Answer Correct Answer: A) Irreversible. 20. By using what can the colloidal particles can be separated from particles of true solution? A) Parchment paper. B) An ultracentrifuge machine. C) An electrolyte. D) Ordinary cloth. Show Answer Correct Answer: A) Parchment paper. 21. The substance which when dissolved in a medium at higher concentration behave as a colloidal sol is A) Multimolecular Colloids. B) Macromolecular colloids. C) Associated colloids. D) Micromolecular colloids. Show Answer Correct Answer: C) Associated colloids. 22. Absorbed acetic acid on activated carbon is: A) Adsorber. B) Absorber. C) Adsorbent. D) Adsorbate. Show Answer Correct Answer: D) Adsorbate. 23. During adsorption, entropy A) Increases. B) Decreases. C) Remains same. D) None of the above. Show Answer Correct Answer: B) Decreases. 24. Adsorption is divided in to A) Physical adsorption. B) Chemical adsorption. C) Both a and b. D) None of these. Show Answer Correct Answer: C) Both a and b. 25. Physical adsorption is: A) Highly specific. B) Irreversible. C) Considerable at high temperature. D) Not very specific. Show Answer Correct Answer: D) Not very specific. ← PreviousNext →Related QuizzesClass 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 1Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 2Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 3Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 4Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 5Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 6Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 7Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 8Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 10Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books