This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 3 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Roushon loves A) Tory. B) Victoria. C) Plum. D) All are correct. Show Answer Correct Answer: D) All are correct. 2. Who investigated Brownian motion? A) Robert Charles. B) Charles Darwin. C) Robert-brown. D) Robert brown. Show Answer Correct Answer: D) Robert brown. 3. Tincture of iodine has antiseptic properties. this solution is made by dissolving A) Iodine in benzene. B) Iodine in water. C) Iodine in alcohol. D) Iodine in ether. Show Answer Correct Answer: C) Iodine in alcohol. 4. Rate of physisorption increases with temperature A) Decrease in temperature. B) Increase in temperature. C) Decrease in pressure. D) Decrease in surface area. Show Answer Correct Answer: A) Decrease in temperature. 5. The purpose of an emulsifier is to ..... A) Decrease surface area in a suspension. B) Reduce the interfacial tension between immiscible phase. C) Minimize the size of globules. D) Improve medication taste. Show Answer Correct Answer: B) Reduce the interfacial tension between immiscible phase. 6. Fixed dense layer of ions strongly adsorbed to the surface A) Stern layer. B) Diffuse layer. C) Electric Double Layer. D) Zeta Potential. Show Answer Correct Answer: A) Stern layer. 7. Which of these is an example of a lyophilic sol? A) Gold sol. B) Starch in water. C) Sulfur sol. D) Smoke. Show Answer Correct Answer: B) Starch in water. 8. POWDERED COFFEE AND WATER A) SOL. B) SUS. C) COL. D) None of the above. Show Answer Correct Answer: A) SOL. 9. How many layers are involved in chemical adsorption? A) One. B) Two. C) Many. D) Zero. Show Answer Correct Answer: A) One. 10. The movement of colloidal particles towards the oppositely charged electrodes on passing electric current is known as A) Tyndall Effect. B) Brownian Motion. C) Electrophoresis. D) Coagulation. Show Answer Correct Answer: C) Electrophoresis. 11. For protecting iron pipes from corrosion, they are coated with A) Zinc. B) Copper. C) Aluminium. D) Silver. Show Answer Correct Answer: A) Zinc. 12. Temperature above which micelles formation takes place is called as A) Critical temperature. B) Kraft temperature. C) Freezing point. D) None of these. Show Answer Correct Answer: B) Kraft temperature. 13. Name of the pressure involved in reverse osmosis A) Osmotic pressure. B) Hydrostatic pressure. C) Both a and b. D) None of the above. Show Answer Correct Answer: C) Both a and b. 14. On increasing Temperature, Chemical Adsorption A) Decreases. B) Increases. C) First increase then decrease. D) First decrease then Increases. Show Answer Correct Answer: C) First increase then decrease. 15. Which of the following increases adsorption? A) Decreasing surface area. B) Increasing temperature in all cases. C) Increasing pressure (for gases). D) Decreasing adsorbate concentration. Show Answer Correct Answer: C) Increasing pressure (for gases). 16. When hit by light, what happens to a colloidal mixture? A) Absorbed. B) Reflected. C) Diffracted. D) Passes through. Show Answer Correct Answer: C) Diffracted. 17. Extent of adsorption of adsorbate from solution phase increases with ..... A) Increase in amount of adsorbate in solution. B) Decrease in surface area of adsorbent. C) Increase in temperature of solution. D) Decrease in amount of adsorbate in solution. Show Answer Correct Answer: A) Increase in amount of adsorbate in solution. 18. Which type of colloids is obtained when both dispersed phase and dispersion medium both are solid A) Sol. B) Solid sol. C) Gel. D) None of the above. Show Answer Correct Answer: B) Solid sol. 19. When a gas is held on the surface of a solid by Van der Waals force, then the adsorption is A) Physical adsorption. B) Chemical adsorption. C) Both. D) None of the above. Show Answer Correct Answer: A) Physical adsorption. 20. What is the process in which colloid will coagulate due to the opposite charge presence? A) Tyndall effect. B) Brownian motion. C) Electrophoresis. D) Dialysis. Show Answer Correct Answer: C) Electrophoresis. 21. Adsorption is invariably an A) Endothermic process. B) Exothermic process. C) Can't be distinguished. D) Both endothermic & exothermic. Show Answer Correct Answer: B) Exothermic process. 22. Hard water may be softened by passing it through: A) Permutit (Zeolite) process. B) Demineralization method. C) Ion exchange resin. D) Sodium hexa meta phosphate (Calgon). Show Answer Correct Answer: A) Permutit (Zeolite) process. 23. Which of the following is lyophilic colloid? A) Milk. B) Gum. C) Fog. D) Blood. Show Answer Correct Answer: B) Gum. 24. For a linear plot of log(x/m) versus log p in a Freundlich adsorption isotherm, which of the following statements is correct? (k and n are constants) A) 1/n appears as the intercept. B) Only 1/n appears as the slope. C) Log(1/n) appears as the intercept. D) Both k and 1/n appear in the slope term. Show Answer Correct Answer: B) Only 1/n appears as the slope. 25. Coconut oil is non polar, while water is polar. They can not be mixed and will not dissolve each other.Emulsion is produce when oil-water mixture is shaken and is added by ..... A) Hot water. B) Salt solution. C) Soap solution. D) Kerosene. Show Answer Correct Answer: C) Soap solution. ← 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 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 10Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books