This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 15 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The following is the colloid synthesis.metal solFe(OH)$_{3}$ solAs$_{2}$S$_{3}$ solSulphur solAgCl solWhich are occupying condensation method? A) 1, 2, 4. B) 1, 4, 5. C) 1, 3, 4. D) 2, 3, 4. Show Answer Correct Answer: D) 2, 3, 4. 2. In Freundlich adsorption isotherm, at saturation pressure, the rate of adsorption becomes equal to the rate of ..... A) Absorption. B) Sorption. C) Desorption. D) Activation. Show Answer Correct Answer: C) Desorption. 3. A plot of log vs log p for adsorption of gas on a solid gives in straight line with slope equal to A) N. B) 1/n. C) Logk. D) -logk. Show Answer Correct Answer: B) 1/n. 4. The correct ascending order of adsorption of the following gases on the same mass of charcoal at same temperature and pressure is A) CH$_{4}$ < H$_{2}$ < SO$_{2}$. B) H$_{2}$ < CH$_{4}$ < SO$_{2}$. C) SO$_{2}$ < CH$_{4}$ < H$_{2}$. D) H$_{2}$ < SO$_{2}$ < CH$_{4}$. Show Answer Correct Answer: B) H$_{2}$ < CH$_{4}$ < SO$_{2}$. 5. What type of adsorption involves weak van der Waals forces? A) Chemisorption. B) Physisorption. C) Ion exchange. D) Electrostatic adsorption. Show Answer Correct Answer: B) Physisorption. 6. The gold number of gelatin is 0.01. Calculate the amount of gelatin to be added to 1000 mL of a colloid sol of gold to prevent its coagulation before adding 1 mL of 10 percent NaCl sol. A) 2mg. B) 1mg. C) 4mg. D) 5mg. Show Answer Correct Answer: B) 1mg. 7. ..... is used as a decolouriser inthe manufacture of canesugar. A) Silica gel. B) Animal charcoal. C) Alumina. D) Ceramic powder. Show Answer Correct Answer: B) Animal charcoal. 8. Example for physisorption A) Adsorption of O$_{2}$ on tungsten. B) Adsorption of H$_{2}$ on nickel. C) Adsorption of N$_{2}$ on mica. D) Adsorption of C$_{2}$H$_{5}$OH$_{ }$on nickel. Show Answer Correct Answer: C) Adsorption of N$_{2}$ on mica. 9. On the basis of data given below predict which of the following gases shows least adsorption on a definite amount of charcoal?Gas-CO2, SO2, CH4, H2 Critical temp./K 304, 630, 190, 33 respectively A) CO$_{2}$. B) SO$_{2}$. C) CH$_{4}$. D) H$_{2}$. Show Answer Correct Answer: B) SO$_{2}$. 10. If the substance is uniformly distributed throughout the body of a solid or a liquid, then it is called A) Adsorption. B) Chemisorption. C) Physiorption. D) Absorption. Show Answer Correct Answer: D) Absorption. 11. The adsorption due to gas molecules being held to the solid surface by vander waal's attractive forces is called A) Chemical adsorption. B) Physical adsorption. C) Chemisorption. D) Absorption. Show Answer Correct Answer: B) Physical adsorption. 12. The formation of micelles which occurs only beyond a certain temperature is called A) Critical temperature. B) Critical sol temperature. C) Kraft Temperature. D) Micelle temperature. Show Answer Correct Answer: C) Kraft Temperature. 13. Hey Shreya, have you ever wondered what role surfactants play in surface chemistry? Let's dive into the bubbly world of chemistry! A) Surfactants lower surface tension and enhance wetting and emulsification in surface chemistry. B) Surfactants have no impact on emulsification processes. C) Surfactants are used solely for cleaning purposes without affecting surface properties. D) Surfactants increase surface tension and reduce wetting. Show Answer Correct Answer: A) Surfactants lower surface tension and enhance wetting and emulsification in surface chemistry. 14. What is the Tyndall effect? A) Scattering of light by colloidal particles. B) Absorption of light by solution. C) Reflection of light by surfaces. D) Refraction of light in water. Show Answer Correct Answer: A) Scattering of light by colloidal particles. 15. Which of following is incorrect statement(s)? A) In lyophilic, surface tension of Sol is lesser than medium. B) In lyophobic, surface tension of Sol is same as medium. C) Colloidal sol shows brownian motion due to different charge on DP particles. D) Colloidal sol shows brownian movement due to same charge on DP particles. Show Answer Correct Answer: C) Colloidal sol shows brownian motion due to different charge on DP particles. 16. Brown colour of the apple after cutting is A) Physical change. B) Chemical change. C) No change. D) Biological change. Show Answer Correct Answer: B) Chemical change. 17. Which is not true for chemisorption? A) It involves high activation energy. B) It is highly specific. C) It involves chemical bond formation. D) It is reversible. Show Answer Correct Answer: D) It is reversible. 18. Formation of micelles takes place only above a particular concentration, known as A) Critical micelles concentration. B) Normal concentration. C) Both. D) None of the above. Show Answer Correct Answer: A) Critical micelles concentration. 19. Which of the following process does not occur at the interface of phases? A) Crystallisation. B) Heterogenous catalysis. C) Homogeneous catalysis. D) Corrosion. Show Answer Correct Answer: C) Homogeneous catalysis. 20. A plot of log x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to A) N. B) 1/n. C) Log K. D) -log K. Show Answer Correct Answer: B) 1/n. ← PreviousRelated 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