This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 1 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Cooloidal solutions are not classified on the basis of: A) Molecular size. B) Nature of the particles. C) Surface tension value. D) Interaction between dispersed phase and dispersion medium. Show Answer Correct Answer: C) Surface tension value. 2. When the concentration of adsorbate is more on the surface than the bulk of the adsorbent it is called as A) Positive adsorption. B) Negative adsorption. C) Positive absorption. D) Negative absorption. Show Answer Correct Answer: A) Positive adsorption. 3. Which can be used as an adsorbent for removal of moisture and controlling humidity in room? A) Silicon. B) Clay. C) Silica. D) Ceramic. Show Answer Correct Answer: C) Silica. 4. The catalyst used in the hydrogenation of oil is A) V$_{2}$O$_{5}$. B) Fe. C) Ni. D) Pt. Show Answer Correct Answer: C) Ni. 5. Examples of lyophobic Sol? A) Protein. B) Gold sol. C) Cellulose. D) Gelatine. Show Answer Correct Answer: B) Gold sol. 6. Select the CORRECT property of a lyophobic sol. A) The colloidal particles are not easily detected by the ultra microscope. B) The surface tension of dispersed phase is generally lower than that of the dispersion medium. C) The viscosity of a sol is similar to that of the dispersion medium (solvent). D) Addition of low concentration of electrolytes has little effect on the coagulation. Show Answer Correct Answer: C) The viscosity of a sol is similar to that of the dispersion medium (solvent). 7. The formation of micelles takes place only above a particular temperature known as A) Craft temperature. B) Kraft temperature. C) Both. D) None of the above. Show Answer Correct Answer: B) Kraft temperature. 8. In EDTA method buffer is used A) To indicate the colour changes. B) To maintain the pH. C) To remove scale. D) To absorb impuritie. Show Answer Correct Answer: B) To maintain the pH. 9. Potential difference between Stern layer and Diffuse layer A) Electric Double layer. B) Helmholtz electrical double layer. C) Zeta potential. D) Bulk layer. Show Answer Correct Answer: C) Zeta potential. 10. Which law the following relation describesPV= a constant A) Charles's law. B) Boyle's law. C) Both the above. D) Avogadro's law. Show Answer Correct Answer: B) Boyle's law. 11. The depth of the color of the solution of methylene blue when treated with finely divided charcoal appreciably. A) Increases. B) No change. C) Decreases. D) May increases of may not increase. Show Answer Correct Answer: C) Decreases. 12. The values of colligative properties of colloidal solution are of small order in comparison to those shown by true solutions of same concentration because of colloidal particles ..... A) Exhibit enormous surface area. B) Remain suspended in the dispersion medium. C) Form lyophilic colloids. D) Are comparatively less in number. Show Answer Correct Answer: D) Are comparatively less in number. 13. A stable mixture of two or more liquids e.g. icecream A) Emulsion. B) Solution. C) Mixture. D) Insoluble. Show Answer Correct Answer: A) Emulsion. 14. Adsorption is an ..... phenomenon A) Bulk. B) Surface. C) Both. D) None of these. Show Answer Correct Answer: B) Surface. 15. Corrosion in metal is A) Adsorption. B) Absorption. C) Desorption. D) Sorption. Show Answer Correct Answer: A) Adsorption. 16. '' A substance is first ground to coarse particles and then mixed with the dispersion medium to produce a suspension."Name the method to produce sol as mentioned above. A) Double decomposition. B) Mechanical dispersion. C) Bredig's arc. D) Peptization. Show Answer Correct Answer: B) Mechanical dispersion. 17. Which of the following is not a multimolecular colloids A) Gold sol. B) Sulphur sol. C) Egg albumin. D) Fe(OH)$_{3}$ sol. Show Answer Correct Answer: C) Egg albumin. 18. Select the CORRECT statement regarding adsorption process. A) A substance is encapsulated in the solid or liquid form. B) A substance is distributed throughout the solid or liquid form. C) A substance becomes attached to the surface of a solid or a liquid. D) It may involve chemisorption only. Show Answer Correct Answer: C) A substance becomes attached to the surface of a solid or a liquid. 19. Only allow electrolytes to pass through under the influence of pressure or suction pump. A) Dialysis. B) Ultracentrifugation. C) Ultrafiltration. D) None of the above. Show Answer Correct Answer: C) Ultrafiltration. 20. Adsorption is A) Exothermic process. B) Endothermic process. C) Both. D) None of the above. Show Answer Correct Answer: A) Exothermic process. 21. In physisorption adsorbent does not show specificity for any particular gas because ..... A) Involved van der Waals forces are universal. B) Gases involved behave like ideal gases. C) Enthalpy of adsorption is low. D) It is a reversible process. Show Answer Correct Answer: A) Involved van der Waals forces are universal. 22. At high concentration of soap in water, soap behaves as A) Multimolecular colloid. B) Macromolecular colloid. C) Associated colloid. D) Solution. Show Answer Correct Answer: C) Associated colloid. 23. The particle size of Colloids are A) < 1 nm. B) >1nm and< 100nm. C) > 100nm. D) >1000. Show Answer Correct Answer: B) >1nm and< 100nm. 24. Freshly prepared precipitate sometimes gets converted to colloidal solution by ..... A) Coagulation. B) Electrolysis. C) Diffusion. D) Peptisation. Show Answer Correct Answer: D) Peptisation. 25. Process of converting a freshly prepared precipitate into colloidal particles by shaking it with the dispersion medium in the presence of a small amount of a suitable electrolyte is called A) Peptization. B) Coagulation. C) Both. D) None of the above. Show Answer Correct Answer: A) Peptization. Next →Related QuizzesClass 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 10Class 12 Chemistry (Part I) Chapter 5 Surface Chemistry Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books