This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 12 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In Freundlich Adsorption isotherm, the value of 1/n is A) 1 in case of physical adsorption. B) 1 in case of chemical adsorption. C) Between 0 and 1 in all cases. D) Less than 0 all cases. Show Answer Correct Answer: C) Between 0 and 1 in all cases. 2. Which of the following does NOT occur at the interface of phases? A) Crystallisation. B) Heterogenous catalysts. C) Homogenous catalysts. D) Corrosion. Show Answer Correct Answer: C) Homogenous catalysts. 3. Water which does not produce lather with soap solution A) Hard water. B) Soft water. C) Distilled water. D) None of the above. Show Answer Correct Answer: A) Hard water. 4. Which method can be used to separate colloids? A) Simple filtration. B) Ultrafiltration or centrifugation. C) Evaporation. D) Crystallization. Show Answer Correct Answer: B) Ultrafiltration or centrifugation. 5. Hey Aisha, have you ever wondered about the fascinating world of surface chemistry in catalysis? Let's explore its applications! A) Reducing the cost of raw materials. B) Increasing the temperature of reactions. C) Eliminating the need for catalysts. D) Applications of surface chemistry in catalysis include enhancing reaction rates, improving selectivity, and optimizing catalyst design through the manipulation of surface properties. Show Answer Correct Answer: D) Applications of surface chemistry in catalysis include enhancing reaction rates, improving selectivity, and optimizing catalyst design through the manipulation of surface properties. 6. What is the characteristic of elastic collisions? A) Loss of energy during the collision. B) No loss of energy during the collision. C) Loss of matter. D) All are correct. Show Answer Correct Answer: B) No loss of energy during the collision. 7. 47)Match the following1) Calgon-kerosene, agar-agar, gelatin, glue (a)2) Sodium Phosphate-NaAlO2 (b)3)Colloidal Conditioning-Na3PO4 (c)4)Sodium Aluminate-Na2(Na4(PO3)6 (d) A) 1-a, 2-b, 3-c, 4-d. B) 1-d, 2-c, 3-a, 4-b. C) 1-d, 2-a, 3-c4-b. D) 1-c, 2-d, 3-a, 4-b. Show Answer Correct Answer: B) 1-d, 2-c, 3-a, 4-b. 8. Area of interface separating two phases depends on A) Shape of the particles. B) Size of the particles. C) Temperature of the particles. D) Independent. Show Answer Correct Answer: B) Size of the particles. 9. Which one from these phenomenons that is not related to the colloidal system? A) Dialysis. B) Tyndall Effect. C) Absorption. D) Electrophoresis. Show Answer Correct Answer: C) Absorption. 10. Movement of colloidal particles under the influence of an electric field is called A) Electrophoresis. B) Electroosmosis. C) Both. D) None of the above. Show Answer Correct Answer: A) Electrophoresis. 11. Blue colour of the sky is due to: A) Absorption of light by dust particles. B) Reflection of light by dust particles. C) Scattering of light by dust particles. D) Presence of clouds. Show Answer Correct Answer: C) Scattering of light by dust particles. 12. Which of the following substances will precipitate the negatively charged emulsions? A) KCl. B) Glucose. C) Urea. D) None of the above. Show Answer Correct Answer: A) KCl. 13. Adsorption is accompanied by A) Decrease in entropy of the system. B) Decrease in enthalpy of the system. C) T$\Delta$S for the process is negative. D) All of the above. Show Answer Correct Answer: D) All of the above. 14. 20) The presence of chlorides and sulphates of calcium and magnesium A) Temporary Hardness. B) Permanent hardness. C) Total hardness. D) None of these. Show Answer Correct Answer: B) Permanent hardness. 15. Adsorption is an A) Endothermic. B) Exothermic. C) Neither endothermic nor exothermic. D) It can be endothermic or exothermic. Show Answer Correct Answer: B) Exothermic. 16. For the coagulation of 50mL of ferric hydroxide sol. 10mL of 0.5 M KCl is required. What is the coagulation value of KCl? A) 5. B) 10. C) 100. D) None of these. Show Answer Correct Answer: C) 100. 17. Which of the following interface cannot be obtained? A) Liquid-liquid. B) Solid-liquid. C) Liquid-gas. D) Gas-gas. Show Answer Correct Answer: D) Gas-gas. 18. What is the primary characteristic of physisorption? A) It involves strong chemical bonds. B) It is generally reversible and weaker. C) It occurs at high temperatures. D) It is limited to solid adsorbents only. Show Answer Correct Answer: B) It is generally reversible and weaker. 19. The diameter of particles in colloidal system is A) 10$^{-9}$ m to 10$^{-6}$ m. B) 10$^{-10}$ m to 10$^{-4}$ m. C) 10$^{-12}$ m to 10$^{-9}$ m. D) 10$^{-7}$ m to 10$^{-5}$ m. Show Answer Correct Answer: A) 10$^{-9}$ m to 10$^{-6}$ m. 20. The Langmuir adsorption isotherm is deduced using the assumption A) The adsorbed molecules interact with each other. B) The adsorption takes place in multilayers. C) The adsorption sites are equivalent in their ability to adsorb the particles. D) The heat of adsorption varies with coverage. Show Answer Correct Answer: C) The adsorption sites are equivalent in their ability to adsorb the particles. 21. Which is favourable for physical adsorption? A) High T and high P. B) High T and low P. C) Low T and high P. D) T and P do not affect. Show Answer Correct Answer: C) Low T and high P. 22. Silica and alumina are used as adsorbents for removing ..... and controlling humidity in a room A) Moisture. B) Cooling. C) Hot. D) Temperature. Show Answer Correct Answer: A) Moisture. 23. Critical Temperature is directly proportional to A) A. B) B. C) R. D) Both a and b. Show Answer Correct Answer: A) A. 24. Chemisorption is A) Multimolecular nature. B) Reversible. C) Often highly specific and directional. D) Not specific. Show Answer Correct Answer: C) Often highly specific and directional. 25. Surface compound formation takes place in A) Physical adsorption. B) Desorption. C) Chemical adsorption. D) Sorption. Show Answer Correct Answer: C) Chemical adsorption. ← 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