This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 13 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 13 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Select the FALSE statement about adsorption. A) The value of adsorption enthalpy of physical adsorption is less than chemical adsorption. B) Physical adsorption occurs due to Van der Waals'forces. C) Chemical adsorption decreases at high temperature and low pressure. D) Physical adsorption is reversible. Show Answer Correct Answer: C) Chemical adsorption decreases at high temperature and low pressure. 2. Method which is used to remove both cations and anions form hard water 8. Another name of permanent hardness a) Non-carbonate hardnessb) Carbonate hardness c) Bicarbonate hardnessd) None of the above A) Ion-exchange method. B) Zeolite method. C) Blow down operation. D) EDTA method. Show Answer Correct Answer: A) Ion-exchange method. 3. The action of enzyme in living system is to: A) Supply energy to tissues. B) Enhances immunity. C) Circulates oxygen. D) Enhances the rate of biochemical reactions. Show Answer Correct Answer: D) Enhances the rate of biochemical reactions. 4. Which shape selective catalyst is used to convert alcohol to gasoline? A) Trpsin. B) Calgon. C) ZSM-5. D) Zeigler-Natta catalyst. Show Answer Correct Answer: C) ZSM-5. 5. Which of the following statement is not correct regarding physical and chemical adsorption? A) Physical adsorption is reversible while chemical is irreversible. B) Chemical adsorption forms multimolecular layer while physical adsorption forms monolayer. C) Physical adsorption has low heat of adsorption than chemical adsorption. D) Chemical adsorption is highly specific in nature while physical adsorption is not. Show Answer Correct Answer: B) Chemical adsorption forms multimolecular layer while physical adsorption forms monolayer. 6. Which one will act as best protective colloid A) Gelatin (Gold no-0.005). B) Starch(gold no-25). C) Gum arabic(Gold no 0.15). D) Egg albumin( gold no 0.08). Show Answer Correct Answer: A) Gelatin (Gold no-0.005). 7. When dispersed phase is liquid and dispersion medium is gas, the colloidal system is called: A) Aerosol. B) Emulsion. C) Smoke. D) Gel. Show Answer Correct Answer: A) Aerosol. 8. A particular adsorption process has the following characteristics:(i) It arises due to van der Waals forces and(ii) it is reversible.Identify the correct statement that describes the above adsorption process A) Adsorption is monolayer. B) Adsorption increases with increase in temperature. C) Enthalpy of adsorption is greater than 100 kJ mol$^{-1}$. D) Energy of activation is low. Show Answer Correct Answer: D) Energy of activation is low. 9. Digestion of food is difficult during fever because A) The digestive system expands. B) The pressure inside the body decreases with respect to outside pressure. C) The volume of the tracts contracts. D) Increase in temperature results in low absorption. Show Answer Correct Answer: D) Increase in temperature results in low absorption. 10. What is the significance of the Langmuir isotherm in adsorption studies? A) It is used to calculate the boiling point of liquids. B) It models adsorption on a surface with a finite number of identical sites. C) It describes the relationship between pressure and volume. D) It explains the diffusion of gases in liquids. Show Answer Correct Answer: B) It models adsorption on a surface with a finite number of identical sites. 11. If the surface area per unit mass of the ..... is greater, then greater is its ..... capacity. A) Adsorbate, adsorbent. B) Solid, storage. C) Adsorbate, surface area. D) Adsorbent, adsorption. Show Answer Correct Answer: D) Adsorbent, adsorption. 12. Water matching distilled water is obtained by using: A) Zeolite process. B) Ion exchange process. C) Lime soda process. D) Boiling. Show Answer Correct Answer: B) Ion exchange process. 13. When adsorption and absorption occurs simultaneously, this process called A) Desorption. B) Adsorption. C) Absorption. D) Sorption. Show Answer Correct Answer: D) Sorption. 14. Electrolyte excess in a colloidal system can be removed by ..... process A) Electrophoresis. B) Ultrafiltration. C) Dialysis. D) Peptization. Show Answer Correct Answer: C) Dialysis. 15. Colloids in which there is strong affinity between the dispersed phase and dispersion medium A) Lyophobic colloids. B) Lyophillic colloids. C) Both. D) None of the above. Show Answer Correct Answer: B) Lyophillic colloids. 16. Identify the positively charged colloid. A) Haemoglobin. B) As$_{2}$S$_{3}$. C) Clay. D) Gold sol. Show Answer Correct Answer: A) Haemoglobin. 17. Size smaller than 1nm are called A) True solution. B) Colloidal solution. C) Suspension. D) Heterosolution. Show Answer Correct Answer: A) True solution. 18. Another name of Calgon is A) Sodium hexa meta phosphate. B) Sodium phosphate. C) Sodium alumino silicate. D) Sodium hydroxide. Show Answer Correct Answer: A) Sodium hexa meta phosphate. 19. In the adsorption of acetic acid on charcoal the acetic acid is A) Adsorbate. B) Adsorbent. C) Absorbent. D) Inner phase. Show Answer Correct Answer: A) Adsorbate. 20. The volume of gases H2, CH4, CO2 and NH3 adsorbed by 1 gm charcoal at 293 K can be given in the order? A) CH$_{4}$ > CO$_{2}$ > NH$_{3}$ > H$_{2}$ $_{ }$. B) CO$_{2}$ > NH$_{3}$ > H$_{2}$ > CH$_{4}$. C) NH$_{3}$ > CO$_{2}$ > H$_{2}$ > CH$_{4}$. D) NH$_{3}$ > CO$_{2}$ > CH$_{4}$ > H$_{2 }$. Show Answer Correct Answer: D) NH$_{3}$ > CO$_{2}$ > CH$_{4}$ > H$_{2 }$. 21. In gas masks which substance is used to absorb toxic gases and vapours? A) Coal powder. B) Animal charcoal. C) Wood charcoal. D) Activated charcoal. Show Answer Correct Answer: D) Activated charcoal. 22. Rough surface of an adsorbent has A) More porus. B) Non porus. C) More active centres. D) Less active centres. Show Answer Correct Answer: C) More active centres. 23. The process of settling of colloidal particle is called ..... A) Peptization. B) Caogulation. C) Dialysis. D) Emulsification. Show Answer Correct Answer: B) Caogulation. 24. Rate of physical adsorption increase with A) Increase in temperature. B) Decrease in pressure. C) Decrease in temperature. D) Decrease in surface area. Show Answer Correct Answer: C) Decrease in temperature. 25. Which of the following statements are correct about solid catalyst? A) Catalytic activity depends upon temperature. B) Catalyst does not change $\Delta$H of reaction. C) Catalyst is required in large quantities to catalyse reactions. D) Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption. Show Answer Correct Answer: B) Catalyst does not change $\Delta$H of reaction. ← 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 9Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books