This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 5 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. 48) The metal EDTA complex is stable at pH . This pH range is maintained by adding buffer. A) 8-10, ammonium. B) 7-10, aluminium. C) 9-10, argentonium. D) 6-9, platinum. Show Answer Correct Answer: A) 8-10, ammonium. 2. Activated adsorption is the other name of A) Physisorption. B) Chemisorption. C) Sorption. D) Absorption. Show Answer Correct Answer: B) Chemisorption. 3. Which are not purely surface phenomena? A) Adsorption, surface tension. B) Surface tension, viscosity. C) Adsorption, viscosity. D) Absorption, viscosity. Show Answer Correct Answer: D) Absorption, viscosity. 4. Chemisorption is held by A) Covalent bond. B) Chemical forces. C) Van der Waal forces. D) Centrifugal. Show Answer Correct Answer: A) Covalent bond. 5. Which of the following is an associated colloid? A) Soap. B) Sol of gold. C) Proteins. D) Starch. Show Answer Correct Answer: A) Soap. 6. What is the primary difference between adsorption and absorption? A) Adsorption is a chemical process, while absorption is physical. B) Adsorption occurs only in gases, while absorption occurs in liquids. C) Adsorption is always reversible, while absorption is not. D) Adsorption involves surface interaction, while absorption involves bulk uptake. Show Answer Correct Answer: D) Adsorption involves surface interaction, while absorption involves bulk uptake. 7. Which one of the following is not a boiler trouble? A) Scale. B) Sludge. C) Zeolite. D) Priming. Show Answer Correct Answer: C) Zeolite. 8. Which substance that includes in aerosol system? A) Soap foam. B) Paint. C) Colored glass. D) Smoke. Show Answer Correct Answer: D) Smoke. 9. Catalyst increases the rate of reaction by: A) Decreasing threshold energy. B) Decreasing activation energy. C) Increasing activation energy. D) Decreasing equilibrium constant. Show Answer Correct Answer: B) Decreasing activation energy. 10. How crystals of pure substance are formed A) By crystallization. B) By chromatography. C) By peptization. D) By all of these method. Show Answer Correct Answer: A) By crystallization. 11. Micelles are A) Ideal solutions. B) Associated colloids. C) Adsorbed surfaces. D) Macromolecular colloids. Show Answer Correct Answer: B) Associated colloids. 12. Which forms multi molecular layers during adsorption A) Vander waal's adsorption. B) Physical adsorption. C) Freundlich adsorption. D) All are correct. Show Answer Correct Answer: D) All are correct. 13. Which of the following ion will have highest coagulating power for coagulating a negatively charged sol? A) $NaCl$. B) $CaCl_2$. C) $AlCl_3$. D) $KCl$. Show Answer Correct Answer: C) $AlCl_3$. 14. What type of adsorption is typically characterized by a high activation energy? A) Physisorption. B) Chemiabsorption. C) Chemisorption. D) Physical adsorption. Show Answer Correct Answer: C) Chemisorption. 15. Indicator used in EDTA method A) Methyl red. B) Phenolphthalein. C) Methyl orange. D) EBT. Show Answer Correct Answer: D) EBT. 16. Which of the following is incorrect about bredig's arc method A) This is case of dispersion and condensation both. B) We can prepare Metal Sol. C) High potential difference is applied across electrodes. D) This is dispersion method. Show Answer Correct Answer: D) This is dispersion method. 17. Which of the following statements is not correct in respect of lyophilic sols A) These are stable and not easily coagulated. B) They carry positive charge. C) Particles are hydrated. D) There is a considerable interaction between the dispersed phase and dispersion medium. Show Answer Correct Answer: B) They carry positive charge. 18. Gold sol can be prepared by A) Hydrolysis of AuCl$_{3}$. B) Oxidation of Gold by aqua-regia. C) Peptization. D) Reduction of AuCl$_{3}$ with HCHO solution. Show Answer Correct Answer: D) Reduction of AuCl$_{3}$ with HCHO solution. 19. 19) The presence of bicarbonates of calcium and magnesium A) Temporary Hardness. B) Permanent hardness. C) Total hardness. D) None of these. Show Answer Correct Answer: A) Temporary Hardness. 20. Hardy-Schulze law states that: A) Solution must have higher gold number. B) Disperse phase and dispersion medium must be of the same sign. C) Micelles coagulate in presence of surfactants. D) The ions carrying more opposite charge to that of sol particle are effective in coagulation. Show Answer Correct Answer: D) The ions carrying more opposite charge to that of sol particle are effective in coagulation. 21. A sample of helium gas has a volume of 520cm$^{3}$ at 100$^{0}$C. Calculate the temperature at which the volume will become 250cm$^{3}$. Assume the pressure to be constant A) 236.45K. B) 101.23K. C) 179.33K. D) None of the above. Show Answer Correct Answer: C) 179.33K. 22. The scattering of light by the dispersed phase is called A) Brownian Movement. B) Tyndall Effect. C) Adsorption. D) None of these. Show Answer Correct Answer: B) Tyndall Effect. 23. What is the charge on hydroxide sol? A) Positive. B) Negative. C) Both. D) None. Show Answer Correct Answer: A) Positive. 24. What is brownian movement? A) Zigzag movement of colloids. B) Reflection of colloids. C) Dispersion of colloids. D) Adsorption of colloids. Show Answer Correct Answer: A) Zigzag movement of colloids. 25. EDL stands for ..... A) Electric double layer. B) Element diffuse layer. C) Element double layer. D) Electric diffuse layer. Show Answer Correct Answer: A) Electric double layer. ← 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 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