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Colloidal dispersion mcq

The document contains 75 multiple choice questions related to colloids and colloidal systems. The questions cover topics such as types of colloids, properties of colloids, methods of preparation and destruction of colloids, micelles, emulsions, and applications of colloidal systems. The document provides answers to each multiple choice question.

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By:- Gourav singh SEM-04 MCQ 1 4/19/2021
1. fog is an example of which type of colloidal system? a) Gas in liquid b) Solid in gas liquid in gas c) Gas in gas d) Liquid in gas Answer:(b) 2. Which of the following properties of colloids does not depend on the charge on particles? a) Coagulation b) Electro-osmosis C) Electrophoresis d) Tyndall Effects Answer:(d) 3. The term used to determine the protecting power of a lyophilic colloids is a) oxidation number b) coagulation number c) gold number d) critical micelle concentration Answer: (c) 4. This method is commonly used for destruction of colloid a) addition of electrolyte b) Condensation c) Dialysis d) Filtration of animal membrane Answer: (a) 4/19/2021 2 Gourav Singh
5. Which of the following compounds form micelles, if their concentration is increased in aqueous solution? a) Urea b) Glucose c) Pyridinium chloride d) Dodecyl trimethyl ammonium chloride Answer: (d) 6. If the concentration of surfactant molecules increases above the critical micelle concentration (CMC), then they a) become soluble b) dissociate c) associate d) decompose Answer: (c) 7. The ability of an ion to coagulate a given colloid is dependent on the a) only charge b) magnitude c) both magnitude and charge d) sign of the charge Answer: (c) 8. 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 Answer: (a) 4/19/2021 3 Gourav Singh
9. Which of the following is an associated colloid? a) Soap b) Sol of gold c) Proteins d) Starch Answer: (a) 10. The position occupied by non-polar hydrophobic and polar hydrophilic group in a micelle is a) non-polar towards the outside and polar towards inside b) polar towards the outside and non-polar towards inside c) both present only at the surface d) both distributed throughout Answer: (b) 11.The dimension of colloid particles is a)Less than that of true solution. b)Between solution and suspension. c)More than that of Suspended particle. d)Can be of many dimension. Answer:(b) 12. Which of the following is the correct order of size of particle. a)Suspension>Colloidal solution>true solution b) Suspension>Colloidal solution=true solution c) true solution>Suspension>Colloidal solution d) true solution=Suspension=Colloidal solution Answer:(a) 4/19/2021 4 Gourav Singh
13. The greater adsorption capacity of colloidal particle is due to a)Electric charge on their particle b)More surface area c)Zigzag motion of colloidal particle d)None of these Answer:(a) 14. Which of the following is an anionic detergent a)Sodium lauryl sulphate b)Cetyl trim ethyl ammonium bromide c)Glyceryl oleate d)Sodium citrate Answer:(b) 15. Which type of colloid is sulphur dissolution a) Associated colloidal b) Michesle c) Multimolecular colloidal d) Macromolecular colloidal Answer:(d) 16.Which of the following colloidal solution can not be prepared by Brediqs are method. a) Sulphur b) Silver c) Gold d) Platinum Answer:(c) 4/19/2021 5 Gourav Singh
17.With which property of colloidal Tyndall effect is associated. a) Mechanical b) Colligative c) Optical d) Electrical Answer:(c) 18. By which instrument the existence of positive or negative electric charge of colloidal is determine a) Electrophoresis b) Microscope c) Ultrasonic dispersed d) Voltmeter Answer:(c) 19. At isoelectric point the colloid a) Stabilizes b) Does not passes electrical charge c) Can not be coagulated d) All of the above Answer:(a) 20.Which method is used to determine the molecular mass of polymer molecules like colloids a)Decreases in vapour pressure b)Depression in freezing point c)Elevation in boiling point Answer:(b) 4/19/2021 6 Gourav Singh
21. The simplest way to check whether the system is colloid by using a) Brownian movement b) Tyndall effect c) Electrodialysis d) Finding out particle size Answer:(b) 22. Which of the following form a colloidal solution in water? a) C6H12O6 b) Nacl c) Ba(No3)2 d) Starch Answer:(d) 23. Which method cannot be used for the coagulation of lyophobic solution? a) By persistant dialysis b) By boiling c) Electro-osmosis d) By Electrophoresis Answer:(c) 24. When amount of dispersed particle is low and intensity of scattered light is measured at right angle to direction of incident light is known to be a) Nephelometer b) Electron microscope c) Tyndall effect d) Diffusion Answer:(a) 4/19/2021 7 Gourav Singh
25. Which equation is used to determine osmotic pressure a) Vant Hoff b) Stokes law c) Einstein’s equation d) Nernst equation Answer:(a) 26. _______ is the method of combining negatively and positively charged hydrophilic colloids a)Coacervation b)Peptization c)Coagulation d)Floculation Answer:(a) 27. The molecule in molecular dispersion phase have size a) Less than 10nm b) Less than 1nm c) More than 1nm d) More than 10nm Answer:(b) 28. Which of the following will have the highest coagulation power As2S3 Colloids? a) Al3+ b) Na+ c) Po4 3- d) PO4 2- Answer:(a) 4/19/2021 8 Gourav Singh
29. Ferric hydroxide is negative solution , which of the following electrolyte will coagulate most a) CaCO3 b) Nacl c) Fecl3 d) BaSo4 Answer:(c) 30. which substance is added containing Suspended impurities to coagulate the suspend impurities and make water fit to drink a)Milk of magnesia b)Kcl c)Nacl d)Alum Answer:(d) 31. Coarse dispersion have? a) 1phase b) 2phase c) 3phase d) 4phase Answer:(b) 32.Sedimentation velocity of spherical particle is governed by_____ a)Electrical property b) Chemical property C) Stokes law d) None of the above Answer:(c) 4/19/2021 9 Gourav Singh
33.Which is more stable among the following ? a)flocculated suspension b)Deflocculated suspension c)Paracetamol suspension d)None of the above Answer:(a) 34. Pharmaceutical emulsions can be a) o/w and w/o b) Multi emulsion c) Micro emulsion d) None of above. Answer:(a) 35.Liquid phase in emulsion cannot be semisolid a)True b) False. Answer:(b) 36.Multimalecular emulsifying agent include a a)Hydrophobic colloids b)Hydrophillc Colloids c) Lyophobic colloids d) Lypophilic Colloids Answer:(b) 4/19/2021 10 Gourav Singh
37. Phase Inversion can also occur due to alterations in emulsifier HLB value by adding ions a)True b)False Answer:(a) 38. Size of Coarse dispersion is a)> 0.3 microns b)< 0.3 microns c)>0.5 microns d)<0.5 microns Answer:(c) 39. All suspensions will settle on sediment over time a)True b)False. Answer:(a) 40. Phase that is presented as fine droplet in emulsion? a)Internal Phase b)External Phase c)None of above Answer:(a) 4/19/2021 11 Gourav Singh
41.fine disperse is a Example of 0/W Emulsion is_____? a)Cream b)Lotion c) Vitamin emulsions d)Gel Answer:(c) 42.Example of W/O emulsion is______? a)Mineral oil b)ointments c)Both d)None of above Answer:(b) 43. Multimolecular emulsifying agents include. a)ACACIA b)Gelatin c)Both d)None above Answer:(c) 44.Change in interfacial tension or film between 2 phase that lead to separation of emulsion into constituent part is called a)Breaking b)Compression C)Cutting d)All of the above Answer:(a) 4/19/2021 12 Gourav Singh
45.According to DLVO, optimal balance in force of attraction and repulsion lead to loosely aggregated particles called? a)Flocs b)Deflocs c)Both A and B d)None of the above Answer:(a) 46. Emulsion are used for? a)Injectable b)Oral c)Opthalmic d)All of the above Answer(d) 47. Monomolecules emulsifying agent include a)Surfactant b)Amphiphiles c)Both A and B d)None of the above Answer:(c) 48.Why we use suspensions? a)Drug is soluble in suspension b)Drug is more stable in Suspension c)Dosing Non- flexibility d)None of the above Answer:(b) 4/19/2021 13 Gourav Singh
49. In a well formulated suspension, drug particle must be_______ a)Appropriate size for site of administered b)Large size of administration c)Small size of administration d)None of the above Answer:(a) 50.Rate of creaming can be decreased by? a)Reducing globule size b)Increase viscosity of continuous phase c)Decrease density of difference between phase d)All of the above Answer:(d) 51.Creaming is the sign of instability? a)True b)False Answer:(a) 52.Stability is achieved by balancing? a)Electrical force of attraction b) Electrical force of repulsion c)Force of solvation d) All of the above Answer:(d) 4/19/2021 14 Gourav Singh
53.Amount of dispersed phase can constitute? a)>20% of total volume b)<40% of total volume c) >50% of total volume d) <30% of total volume Answer:(c) 54. The stability of lyophobic colloids can be described by a)DLVO theory b)Lyotropic series c)Schulze hardy d)Donar Answer:(a) 55.Tyndall effect is shown by a)Colloidal system b)Coarse dispersion c)True solution d)Both a and b Answer(d) 56.Which of the following is not a solution? a)Salt water b)Air C)Smoke d)All of the above Answer:(c) 4/19/2021 15 Gourav Singh
57.In which type of filtration colloid of particle are separated? a)Conventional b)Cloth type c)Ultra d)Sieve Answer:(c) 58.Less interaction with dispersion medium shown by a)Associative b)Lyophobic c)Lyophillic d)All of the above Answer(b) 59. Lyophobic and Lyophillic colloids are classify by a)The appearance b)The interaction of two phase c)The structure of particle d)Shapes of particles Answer:(b) 60.Peptization is a process in which a)Suspension is converted into a solution b)Colloidal particle are settle c)Precipitate dissolve solution d)Precipitate converted into colloids Answer:(d) 4/19/2021 16 Gourav Singh
61.Flocculation value of a coagulating electrolyte is expressed in a)Milli mol L- b) Mol L-1 c)Mg d) Microgram Answer(a) 62.Which one is example of colligative property a)Osmotic pressure b)Dissociation c)Solubility d)None of the above Answer(a) 63.Colloidal drug delivery systems include a)Nano particles. b)Microsphere c)Liposomes d)All of these Ans:(d) 64.Colloidal drug delivery systems include are used. a)Topically b) Orally c) Parentally d)All of these Answer:(d) 4/19/2021 17 Gourav Singh
65. ...........to defined as the diameter of a circle having the same area of the particle. a)Feret's diameter b)Projected area diameter. c)Martin diameter d)All of these Answer:(b) 66.The ............is due to scattering of light a)Loss of intensity b)gain of intensity c)Precipitation. d)Centrifugation Answer:(a) 67.The scattering intensity increases with in the particle radius a)No change b)Decrease c)Increase b)None of these Answer:(c) 68.________is a measure of the protective ability of hydrophillic colloid. a)Precipitation b)Solubility c)Crystallization d)Gold number Answer:(d) 4/19/2021 18 Gourav Singh
69. ...........is defined as the attachment of water molecules to the molecules of dispersed phase. a)Sublimation b)Solvation c)Hydration d)None of these Answer:(c) 70. ........... are the materials which form lyophobic colloides A)Gold B)Acacia C)sulfur. D)silver iodine a)B and C b)A,C and D C) A,C and A d)B and D Answer:(b) 71. ......is defined as the resistance to flow of liquid under an applied stress a)Elasticity b)Obesity c)Velocity d)Viscosity Answer:(d) 72. Gold number of gelatin is a)0.2-0.5 b)1-5 c)0.005-0.01 d)2-5 Answer:(c) 4/19/2021 19 Gourav Singh
73. The major different between crystalloids & Colloid is a)The Volume of their particle b)There Solubility c) the partical of diffusion (spreading) Answer:(a) 74. Calculate the size of the colloidal particle present in the mixture of fats and milk from the given data. Amount of milk in litres:20 Amounts of fats in gram:10 Time taken to mix the ingredient:20 sec a)3 b)6 c)4 d)61 Answer:(c) Explanation: Size of colloidal particle can be given by the formula Size=amount of solvent x time/amount of colloidal Size=20 x 20 / 10 Size=4 75.What is the size of normal an amino acid? a)1 to 2 nm b)2 to 3 nm c)4 to 5 nm d)2 to 5 nm Answer:(a) 4/19/2021 20 Gourav Singh
76.What is called a dispersion phase? a)It is the main layer b)It is the secondary layer in which the colloidal particles are dispersed c)It is the secondary layer d)It is the basic colloidal layer Answer:(b) 77.What is called a dispersion medium? a)It is where the dispersed phase settles b)It is where the solute particles settle c)It is where the dispersed phase is suspended d)It is the primary medium Answer:(c) 78.When the tiny particle of a substance are dispersed through a medium then the mixture is called a)Alloys b)Amalgams c)Suspension d)Colloid Answer(d) 79.Colloids can a)Scatter light b)Not scatter light c)Absorb heat d)Evolve heat Answer:(a) 4/19/2021 21 Gourav Singh
80.Gold number of Egg Albumin is a)0.15 to 0.25 b)25 c)0.03 d)0.4 Answer:(b) 81.Size of molecular dispersion is a)Greater than 10nm b)Lesser than 0.1nm c)Greater than 1nm d)Less than 1nm Answer:(d) 82.colloidal dispersion is detected by? a)Microscope b)Tyndall effect C)Ultramicroscope d)Compound microscope Answer:(c) 83.What is tyndall effect? a)Beam of light pass through a colloidal solution b) Beam of light pass through a ideal solution c)Both A and B d)None of these Answer:(a) 4/19/2021 22 Gourav Singh
84. What is diffusion? a)Particle diffuse from a region of a higher conc. To lower conc. b) Particle diffuse from a region of a lower conc. To lower conc. C) Particle diffuse from a region of a lower conc. To higher conc. d) Particle diffuse from a region of a higher conc. To higher conc. Answer:(a) 85.DLVO theory is given by scientist is a)Deming, Langmuir, vitullo, Ortmann b)David , Lisker, vilkomir, Orchard c)Derjaguin, Landau, Verway, Overbeek D)None of these Answer:(c) 86. The solution of rubber in benzene is example of- a) Multi-molecular b) Macro-molecule c) Associated d) Lyophobic Answer :(b) 87. The coagulation of 10ml of gold solution in just prevented by 1nm of 10% NaCl in presence of 0.025gm of starch. The gold of number is ______ a) 0.25 b) 25 c) 250 d) 25 Answer :(b) 4/19/2021 23 Gourav Singh
88. Particle size of colloidal dispersion is a) Less than in “m” b) 1µm to 0.5 mm c) 10 A0 d) 1nm to 0.5 µm Answer :(d) 89. Sulphur in water is example of a) Lyophilic b) Lyophobic c) Associate d) All Answer :(b) 90. Mayonaise is example of which colloidal type a) Solid liquid b) Liquid liquid c) Solid gel d) Solid solution Answer :(b) 4/19/2021 24 Gourav Singh
91. If the Zeta-potential of suspension is reduced below certain value the alteration of particle lead to a) Flocculation b) De-flocculation c) Sedimentation d) Precipitation Answer :(a) 92. Which of the following is Crystalloid a) Egg albumin b) Starch c) Glucose d) Gum Answer :(c) 93. Colloid on is a colloidal solution of cellulose nitrate in ethyl alcohol a) 2.1 b) 4.1 c) 1.1 d) 3.1 Answer :(b) 94. Which of the following dispersion and condensation both? a) Excessive cooling b) Peptization c) Bredig’s arc d) Hydrolysis Answer :(a) 4/19/2021 25 Gourav Singh
95. Suspending agent are also called as? a) Bumpers b) Non- bumpers c) Thickening agents d) None of the above Answer :(c) 96. In case of colloids, particles in red gold solution increase in size, the colour of dispersion will become _____ a) Green b) Red c) Blue d) Yellow Answer :(c) 97. Zig-zag motion of particles in colloid was observed by a) Tyndall b) Zsigmondy c) Robert brown d) Thomas Graham Answer :(c) 98.The gold number of A, B C and D are 0.04, 0.002, 10 and 25 respectively. Protective power of A, B, C and D are in order a)A>B>C>D b)B>A>C>D c)D>C>B>A d)C>A>B>D Answer :(b) 4/19/2021 26 Gourav Singh
99. If gold number of A, B, C and D are 0.005, 0.05, 0.5 and 5 respectively, then which of the following will have the highest protective power a)A b)B c)C d) D Answer :(a) 100. Which of the following statements is not true for a lyophilic solution? a) It can be easily solvated b) It carries no charge c) Coagulation of this sol is reversible in nature d) It is not very stable in a solvent Answer :(d) 101. . Whipped cream is an example of Dispersion medium Dispersed phase a) Gas Liquid b) Liquid Gas c) Liquid Liquid d) Liquid Solid Answer:(b) 4/19/2021 Gourav Singh 27
102. Which one of the sols acts as protective colloid? a) As2S3 b) Gelatin c) Au d) Fe(OH3) Answer :(b) 103. In shaving cream, the dispersion medium is a) Liquid b) Gas c) Solid d) None of these Answer :(a) 104.In dialysis, colloidal particles are separated from a) Solvent b) Dispersed phase c) Ions of electrolytes d) Particles of dispersion medium Answer :(c) 105. Colour of colloidal solution is due to a) Different size of colloidal particles b) Due to formation of complex c) Due to formation of hydrated crystal d) None of these Answer:(a) 4/19/2021 Gourav Singh 28
106. Which one of the following properties of colloids is related with scattering of light? a) Diffusion b) Peptization c) Tyndall effect d) Brownian movement Answer :(c) 107. The shape of colloidal particles is a) Sphere like b) Rod like c) Disc like d) Thread like e) All of these Answer :(e) 108.In which of the following Tyndall effect is not observed a) Suspensions b) Emulsions c) Sugar solution d) Gold sol Answer :(c) 109. Gold number is a) The number of mg of lyophilic colloid which should be added to 10 ml of ferric hydroxide sol so as to prevent its coagulation by the addition of 1 ml of 10% sodium chloride solution. b) The number of mg of lyophilic colloid which should be added to 10 ml of standard gold sol so as to prevent its coagulation by the addition of 1 ml of 10% NaCl. c) The mg of gold salt to be added to a lyophilic colloid to coagulate it. d) The mg of an electrolyte required to coagulate a colloid Answer :(b) 4/19/2021 Gourav Singh 29
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Colloidal dispersion mcq

  • 1.
  • 2.
    1. fog isan example of which type of colloidal system? a) Gas in liquid b) Solid in gas liquid in gas c) Gas in gas d) Liquid in gas Answer:(b) 2. Which of the following properties of colloids does not depend on the charge on particles? a) Coagulation b) Electro-osmosis C) Electrophoresis d) Tyndall Effects Answer:(d) 3. The term used to determine the protecting power of a lyophilic colloids is a) oxidation number b) coagulation number c) gold number d) critical micelle concentration Answer: (c) 4. This method is commonly used for destruction of colloid a) addition of electrolyte b) Condensation c) Dialysis d) Filtration of animal membrane Answer: (a) 4/19/2021 2 Gourav Singh
  • 3.
    5. Which ofthe following compounds form micelles, if their concentration is increased in aqueous solution? a) Urea b) Glucose c) Pyridinium chloride d) Dodecyl trimethyl ammonium chloride Answer: (d) 6. If the concentration of surfactant molecules increases above the critical micelle concentration (CMC), then they a) become soluble b) dissociate c) associate d) decompose Answer: (c) 7. The ability of an ion to coagulate a given colloid is dependent on the a) only charge b) magnitude c) both magnitude and charge d) sign of the charge Answer: (c) 8. 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 Answer: (a) 4/19/2021 3 Gourav Singh
  • 4.
    9. Which ofthe following is an associated colloid? a) Soap b) Sol of gold c) Proteins d) Starch Answer: (a) 10. The position occupied by non-polar hydrophobic and polar hydrophilic group in a micelle is a) non-polar towards the outside and polar towards inside b) polar towards the outside and non-polar towards inside c) both present only at the surface d) both distributed throughout Answer: (b) 11.The dimension of colloid particles is a)Less than that of true solution. b)Between solution and suspension. c)More than that of Suspended particle. d)Can be of many dimension. Answer:(b) 12. Which of the following is the correct order of size of particle. a)Suspension>Colloidal solution>true solution b) Suspension>Colloidal solution=true solution c) true solution>Suspension>Colloidal solution d) true solution=Suspension=Colloidal solution Answer:(a) 4/19/2021 4 Gourav Singh
  • 5.
    13. The greateradsorption capacity of colloidal particle is due to a)Electric charge on their particle b)More surface area c)Zigzag motion of colloidal particle d)None of these Answer:(a) 14. Which of the following is an anionic detergent a)Sodium lauryl sulphate b)Cetyl trim ethyl ammonium bromide c)Glyceryl oleate d)Sodium citrate Answer:(b) 15. Which type of colloid is sulphur dissolution a) Associated colloidal b) Michesle c) Multimolecular colloidal d) Macromolecular colloidal Answer:(d) 16.Which of the following colloidal solution can not be prepared by Brediqs are method. a) Sulphur b) Silver c) Gold d) Platinum Answer:(c) 4/19/2021 5 Gourav Singh
  • 6.
    17.With which propertyof colloidal Tyndall effect is associated. a) Mechanical b) Colligative c) Optical d) Electrical Answer:(c) 18. By which instrument the existence of positive or negative electric charge of colloidal is determine a) Electrophoresis b) Microscope c) Ultrasonic dispersed d) Voltmeter Answer:(c) 19. At isoelectric point the colloid a) Stabilizes b) Does not passes electrical charge c) Can not be coagulated d) All of the above Answer:(a) 20.Which method is used to determine the molecular mass of polymer molecules like colloids a)Decreases in vapour pressure b)Depression in freezing point c)Elevation in boiling point Answer:(b) 4/19/2021 6 Gourav Singh
  • 7.
    21. The simplestway to check whether the system is colloid by using a) Brownian movement b) Tyndall effect c) Electrodialysis d) Finding out particle size Answer:(b) 22. Which of the following form a colloidal solution in water? a) C6H12O6 b) Nacl c) Ba(No3)2 d) Starch Answer:(d) 23. Which method cannot be used for the coagulation of lyophobic solution? a) By persistant dialysis b) By boiling c) Electro-osmosis d) By Electrophoresis Answer:(c) 24. When amount of dispersed particle is low and intensity of scattered light is measured at right angle to direction of incident light is known to be a) Nephelometer b) Electron microscope c) Tyndall effect d) Diffusion Answer:(a) 4/19/2021 7 Gourav Singh
  • 8.
    25. Which equationis used to determine osmotic pressure a) Vant Hoff b) Stokes law c) Einstein’s equation d) Nernst equation Answer:(a) 26. _______ is the method of combining negatively and positively charged hydrophilic colloids a)Coacervation b)Peptization c)Coagulation d)Floculation Answer:(a) 27. The molecule in molecular dispersion phase have size a) Less than 10nm b) Less than 1nm c) More than 1nm d) More than 10nm Answer:(b) 28. Which of the following will have the highest coagulation power As2S3 Colloids? a) Al3+ b) Na+ c) Po4 3- d) PO4 2- Answer:(a) 4/19/2021 8 Gourav Singh
  • 9.
    29. Ferric hydroxideis negative solution , which of the following electrolyte will coagulate most a) CaCO3 b) Nacl c) Fecl3 d) BaSo4 Answer:(c) 30. which substance is added containing Suspended impurities to coagulate the suspend impurities and make water fit to drink a)Milk of magnesia b)Kcl c)Nacl d)Alum Answer:(d) 31. Coarse dispersion have? a) 1phase b) 2phase c) 3phase d) 4phase Answer:(b) 32.Sedimentation velocity of spherical particle is governed by_____ a)Electrical property b) Chemical property C) Stokes law d) None of the above Answer:(c) 4/19/2021 9 Gourav Singh
  • 10.
    33.Which is morestable among the following ? a)flocculated suspension b)Deflocculated suspension c)Paracetamol suspension d)None of the above Answer:(a) 34. Pharmaceutical emulsions can be a) o/w and w/o b) Multi emulsion c) Micro emulsion d) None of above. Answer:(a) 35.Liquid phase in emulsion cannot be semisolid a)True b) False. Answer:(b) 36.Multimalecular emulsifying agent include a a)Hydrophobic colloids b)Hydrophillc Colloids c) Lyophobic colloids d) Lypophilic Colloids Answer:(b) 4/19/2021 10 Gourav Singh
  • 11.
    37. Phase Inversioncan also occur due to alterations in emulsifier HLB value by adding ions a)True b)False Answer:(a) 38. Size of Coarse dispersion is a)> 0.3 microns b)< 0.3 microns c)>0.5 microns d)<0.5 microns Answer:(c) 39. All suspensions will settle on sediment over time a)True b)False. Answer:(a) 40. Phase that is presented as fine droplet in emulsion? a)Internal Phase b)External Phase c)None of above Answer:(a) 4/19/2021 11 Gourav Singh
  • 12.
    41.fine disperse isa Example of 0/W Emulsion is_____? a)Cream b)Lotion c) Vitamin emulsions d)Gel Answer:(c) 42.Example of W/O emulsion is______? a)Mineral oil b)ointments c)Both d)None of above Answer:(b) 43. Multimolecular emulsifying agents include. a)ACACIA b)Gelatin c)Both d)None above Answer:(c) 44.Change in interfacial tension or film between 2 phase that lead to separation of emulsion into constituent part is called a)Breaking b)Compression C)Cutting d)All of the above Answer:(a) 4/19/2021 12 Gourav Singh
  • 13.
    45.According to DLVO,optimal balance in force of attraction and repulsion lead to loosely aggregated particles called? a)Flocs b)Deflocs c)Both A and B d)None of the above Answer:(a) 46. Emulsion are used for? a)Injectable b)Oral c)Opthalmic d)All of the above Answer(d) 47. Monomolecules emulsifying agent include a)Surfactant b)Amphiphiles c)Both A and B d)None of the above Answer:(c) 48.Why we use suspensions? a)Drug is soluble in suspension b)Drug is more stable in Suspension c)Dosing Non- flexibility d)None of the above Answer:(b) 4/19/2021 13 Gourav Singh
  • 14.
    49. In awell formulated suspension, drug particle must be_______ a)Appropriate size for site of administered b)Large size of administration c)Small size of administration d)None of the above Answer:(a) 50.Rate of creaming can be decreased by? a)Reducing globule size b)Increase viscosity of continuous phase c)Decrease density of difference between phase d)All of the above Answer:(d) 51.Creaming is the sign of instability? a)True b)False Answer:(a) 52.Stability is achieved by balancing? a)Electrical force of attraction b) Electrical force of repulsion c)Force of solvation d) All of the above Answer:(d) 4/19/2021 14 Gourav Singh
  • 15.
    53.Amount of dispersedphase can constitute? a)>20% of total volume b)<40% of total volume c) >50% of total volume d) <30% of total volume Answer:(c) 54. The stability of lyophobic colloids can be described by a)DLVO theory b)Lyotropic series c)Schulze hardy d)Donar Answer:(a) 55.Tyndall effect is shown by a)Colloidal system b)Coarse dispersion c)True solution d)Both a and b Answer(d) 56.Which of the following is not a solution? a)Salt water b)Air C)Smoke d)All of the above Answer:(c) 4/19/2021 15 Gourav Singh
  • 16.
    57.In which typeof filtration colloid of particle are separated? a)Conventional b)Cloth type c)Ultra d)Sieve Answer:(c) 58.Less interaction with dispersion medium shown by a)Associative b)Lyophobic c)Lyophillic d)All of the above Answer(b) 59. Lyophobic and Lyophillic colloids are classify by a)The appearance b)The interaction of two phase c)The structure of particle d)Shapes of particles Answer:(b) 60.Peptization is a process in which a)Suspension is converted into a solution b)Colloidal particle are settle c)Precipitate dissolve solution d)Precipitate converted into colloids Answer:(d) 4/19/2021 16 Gourav Singh
  • 17.
    61.Flocculation value ofa coagulating electrolyte is expressed in a)Milli mol L- b) Mol L-1 c)Mg d) Microgram Answer(a) 62.Which one is example of colligative property a)Osmotic pressure b)Dissociation c)Solubility d)None of the above Answer(a) 63.Colloidal drug delivery systems include a)Nano particles. b)Microsphere c)Liposomes d)All of these Ans:(d) 64.Colloidal drug delivery systems include are used. a)Topically b) Orally c) Parentally d)All of these Answer:(d) 4/19/2021 17 Gourav Singh
  • 18.
    65. ...........to definedas the diameter of a circle having the same area of the particle. a)Feret's diameter b)Projected area diameter. c)Martin diameter d)All of these Answer:(b) 66.The ............is due to scattering of light a)Loss of intensity b)gain of intensity c)Precipitation. d)Centrifugation Answer:(a) 67.The scattering intensity increases with in the particle radius a)No change b)Decrease c)Increase b)None of these Answer:(c) 68.________is a measure of the protective ability of hydrophillic colloid. a)Precipitation b)Solubility c)Crystallization d)Gold number Answer:(d) 4/19/2021 18 Gourav Singh
  • 19.
    69. ...........is definedas the attachment of water molecules to the molecules of dispersed phase. a)Sublimation b)Solvation c)Hydration d)None of these Answer:(c) 70. ........... are the materials which form lyophobic colloides A)Gold B)Acacia C)sulfur. D)silver iodine a)B and C b)A,C and D C) A,C and A d)B and D Answer:(b) 71. ......is defined as the resistance to flow of liquid under an applied stress a)Elasticity b)Obesity c)Velocity d)Viscosity Answer:(d) 72. Gold number of gelatin is a)0.2-0.5 b)1-5 c)0.005-0.01 d)2-5 Answer:(c) 4/19/2021 19 Gourav Singh
  • 20.
    73. The majordifferent between crystalloids & Colloid is a)The Volume of their particle b)There Solubility c) the partical of diffusion (spreading) Answer:(a) 74. Calculate the size of the colloidal particle present in the mixture of fats and milk from the given data. Amount of milk in litres:20 Amounts of fats in gram:10 Time taken to mix the ingredient:20 sec a)3 b)6 c)4 d)61 Answer:(c) Explanation: Size of colloidal particle can be given by the formula Size=amount of solvent x time/amount of colloidal Size=20 x 20 / 10 Size=4 75.What is the size of normal an amino acid? a)1 to 2 nm b)2 to 3 nm c)4 to 5 nm d)2 to 5 nm Answer:(a) 4/19/2021 20 Gourav Singh
  • 21.
    76.What is calleda dispersion phase? a)It is the main layer b)It is the secondary layer in which the colloidal particles are dispersed c)It is the secondary layer d)It is the basic colloidal layer Answer:(b) 77.What is called a dispersion medium? a)It is where the dispersed phase settles b)It is where the solute particles settle c)It is where the dispersed phase is suspended d)It is the primary medium Answer:(c) 78.When the tiny particle of a substance are dispersed through a medium then the mixture is called a)Alloys b)Amalgams c)Suspension d)Colloid Answer(d) 79.Colloids can a)Scatter light b)Not scatter light c)Absorb heat d)Evolve heat Answer:(a) 4/19/2021 21 Gourav Singh
  • 22.
    80.Gold number ofEgg Albumin is a)0.15 to 0.25 b)25 c)0.03 d)0.4 Answer:(b) 81.Size of molecular dispersion is a)Greater than 10nm b)Lesser than 0.1nm c)Greater than 1nm d)Less than 1nm Answer:(d) 82.colloidal dispersion is detected by? a)Microscope b)Tyndall effect C)Ultramicroscope d)Compound microscope Answer:(c) 83.What is tyndall effect? a)Beam of light pass through a colloidal solution b) Beam of light pass through a ideal solution c)Both A and B d)None of these Answer:(a) 4/19/2021 22 Gourav Singh
  • 23.
    84. What isdiffusion? a)Particle diffuse from a region of a higher conc. To lower conc. b) Particle diffuse from a region of a lower conc. To lower conc. C) Particle diffuse from a region of a lower conc. To higher conc. d) Particle diffuse from a region of a higher conc. To higher conc. Answer:(a) 85.DLVO theory is given by scientist is a)Deming, Langmuir, vitullo, Ortmann b)David , Lisker, vilkomir, Orchard c)Derjaguin, Landau, Verway, Overbeek D)None of these Answer:(c) 86. The solution of rubber in benzene is example of- a) Multi-molecular b) Macro-molecule c) Associated d) Lyophobic Answer :(b) 87. The coagulation of 10ml of gold solution in just prevented by 1nm of 10% NaCl in presence of 0.025gm of starch. The gold of number is ______ a) 0.25 b) 25 c) 250 d) 25 Answer :(b) 4/19/2021 23 Gourav Singh
  • 24.
    88. Particle sizeof colloidal dispersion is a) Less than in “m” b) 1µm to 0.5 mm c) 10 A0 d) 1nm to 0.5 µm Answer :(d) 89. Sulphur in water is example of a) Lyophilic b) Lyophobic c) Associate d) All Answer :(b) 90. Mayonaise is example of which colloidal type a) Solid liquid b) Liquid liquid c) Solid gel d) Solid solution Answer :(b) 4/19/2021 24 Gourav Singh
  • 25.
    91. If theZeta-potential of suspension is reduced below certain value the alteration of particle lead to a) Flocculation b) De-flocculation c) Sedimentation d) Precipitation Answer :(a) 92. Which of the following is Crystalloid a) Egg albumin b) Starch c) Glucose d) Gum Answer :(c) 93. Colloid on is a colloidal solution of cellulose nitrate in ethyl alcohol a) 2.1 b) 4.1 c) 1.1 d) 3.1 Answer :(b) 94. Which of the following dispersion and condensation both? a) Excessive cooling b) Peptization c) Bredig’s arc d) Hydrolysis Answer :(a) 4/19/2021 25 Gourav Singh
  • 26.
    95. Suspending agentare also called as? a) Bumpers b) Non- bumpers c) Thickening agents d) None of the above Answer :(c) 96. In case of colloids, particles in red gold solution increase in size, the colour of dispersion will become _____ a) Green b) Red c) Blue d) Yellow Answer :(c) 97. Zig-zag motion of particles in colloid was observed by a) Tyndall b) Zsigmondy c) Robert brown d) Thomas Graham Answer :(c) 98.The gold number of A, B C and D are 0.04, 0.002, 10 and 25 respectively. Protective power of A, B, C and D are in order a)A>B>C>D b)B>A>C>D c)D>C>B>A d)C>A>B>D Answer :(b) 4/19/2021 26 Gourav Singh
  • 27.
    99. If goldnumber of A, B, C and D are 0.005, 0.05, 0.5 and 5 respectively, then which of the following will have the highest protective power a)A b)B c)C d) D Answer :(a) 100. Which of the following statements is not true for a lyophilic solution? a) It can be easily solvated b) It carries no charge c) Coagulation of this sol is reversible in nature d) It is not very stable in a solvent Answer :(d) 101. . Whipped cream is an example of Dispersion medium Dispersed phase a) Gas Liquid b) Liquid Gas c) Liquid Liquid d) Liquid Solid Answer:(b) 4/19/2021 Gourav Singh 27
  • 28.
    102. Which oneof the sols acts as protective colloid? a) As2S3 b) Gelatin c) Au d) Fe(OH3) Answer :(b) 103. In shaving cream, the dispersion medium is a) Liquid b) Gas c) Solid d) None of these Answer :(a) 104.In dialysis, colloidal particles are separated from a) Solvent b) Dispersed phase c) Ions of electrolytes d) Particles of dispersion medium Answer :(c) 105. Colour of colloidal solution is due to a) Different size of colloidal particles b) Due to formation of complex c) Due to formation of hydrated crystal d) None of these Answer:(a) 4/19/2021 Gourav Singh 28
  • 29.
    106. Which oneof the following properties of colloids is related with scattering of light? a) Diffusion b) Peptization c) Tyndall effect d) Brownian movement Answer :(c) 107. The shape of colloidal particles is a) Sphere like b) Rod like c) Disc like d) Thread like e) All of these Answer :(e) 108.In which of the following Tyndall effect is not observed a) Suspensions b) Emulsions c) Sugar solution d) Gold sol Answer :(c) 109. Gold number is a) The number of mg of lyophilic colloid which should be added to 10 ml of ferric hydroxide sol so as to prevent its coagulation by the addition of 1 ml of 10% sodium chloride solution. b) The number of mg of lyophilic colloid which should be added to 10 ml of standard gold sol so as to prevent its coagulation by the addition of 1 ml of 10% NaCl. c) The mg of gold salt to be added to a lyophilic colloid to coagulate it. d) The mg of an electrolyte required to coagulate a colloid Answer :(b) 4/19/2021 Gourav Singh 29
  • 30.