Colloidal dispersion mcq 4th sem- physical pharmaceutics-ii

1. By:- Gourav singh
SEM-04
MCQ
1
4/19/2021

2. 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)
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3. 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)
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4. 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)
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5. 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)
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6. 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)
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7. 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)
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8. 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)
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9. 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)
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10. 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)
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11. 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)
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12. 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)
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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)
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14. 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)
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15. 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)
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16. 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)
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17. 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)
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18. 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)
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19. 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)
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20. 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)
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21. 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)
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22. 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)
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23. 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)
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24. 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)
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25. 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)
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26. 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)
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27. 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)
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28. 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)
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29. 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)
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