Correct : B. dispersed particles are in the size range of 1 nm to 1 µm
3. Solutions of proteins and starch in water are the examples of the colloidal type:
Correct : A. hydrophilic
4. Electrodialysis method is employed in the colloidal chemistry for the purpose of :
Correct : C. Purification
5. Silica gel is an example for the type of gel:
Correct : C. rigid
6. Which of the following DO NOT form colloid spontaneously?
Correct : C. lyophobic
7. Sulphur sol is an example of colloidal type:
Correct : D. lyophobic
8. Thixotropic type of behavior is shown by the gel:
Correct : A. bentonite
9. In the determination of size, shape and structure of colloidal particles, which one of the following CAN
NOT be used?
Correct : D. ultramicroscope
10. Surfactant solutions are termed as association colloids when their concentrations are:
Correct : D. more than cmc
11. Name the type of colloidal dispersion to which electrolytes are normally added in small quantities to
stabilize:
Correct : C. lyophobic
12. Protective colloids DO NOT:
Correct : C. lower the interfacial tension
13. Which one of the following colloids is difficult to prepare?
Correct : C. hydrophobic
14. In high concentrations, electrolytes destabilize a lyophilic sol by a process termed as :
Correct : C. salting out
15. Which quality of the dispersed phase is responsible for the increased viscosity of a hydrophilic
colloidal dispersion?
Correct : D. surface area
16. Dispersion of acacia in water gives the colloid of type:
Correct : B. negative
17. Addition of alcohol to a hydrophilic colloid leads to:
Correct : C. precipitation
18. The critical value of zeta potential (in milli volts) for a stable colloid (except gold sol) is:
Correct : A. from 20 to 50
19. If kinetic energy of interaction is about 25 kT (Where k is gas constant), the system can be considered
to have:
Correct : B. long half life
20. In foams, the dispersed phase and dispersion medium, respectively, are:
Correct : A. gas and liquid
21. The characteristic of a lyophobic sol is that:
Correct : C. particles have high electric charge
22. Hydrosol refers to a system in which the dispersed phase and dispersion medium, respectively, are:
Correct : C. solid and water
23. Electrodialysis is used, when impurities in a sol are:
Correct : C. electrolytes
24. Under ultramicroscope, colloid particles appear as:
Correct : A. bright specks against dark background
25. Which one of the following properties is extensively applied for determining the molecular weight of
polymer?
Correct : D. osmotic pressure
26. Aerosol is the reverse of :
Correct : B. liquid foam
27. In the determination of the gold number of a protective colloid, the endpoint is indicated by:
Correct : C. observing the color change
28. The semipermeable membrane used in haemodialysis is:
Correct : A. cellophane
29. The stability of acacia in water is due to:
Correct : B. hydration of solids
30. The molecular weight of dispersed solids in a colloidal system can be determined using an
instrument:
Correct : A. ultracentrifuge
31. When the size of particle is less than 1nm then it is called
Correct : A. Molecular dispersions
32. The movement of colloidal particles through a liquid under the influence of electric field is called
Correct : A. Electrophoresis
33. The potential difference develop when particles settle under the influence of gravity is called
Correct : D. Sedimentation potential
34. When distance between the particle are large, the particles experience attractive force and aggregates
are formed. This is known as
Correct : C. secondary minimum
35. According to schulze-Hardy rule, the precipitating power increases rapidly with the
Correct : A. Presence of valence or charge of the ions
36. When a beam of light is pass through a colloidal solution, the path of light gets illuminated. This
phenomenon is known as
Correct : C. Tyndall effect
37. The continuous collisions between the colloidal particles and molecules of dispersion medium
produce zigzag movement of colloidal particles which is known as
Correct : A. Brownian movement
38. The protective ability of colloids is measured as
Correct : C. Gold number
39. If the gold number is less then the protective action will be
Correct : A. more
40. In sol, the dispersed phase and dispersion medium are
Correct : A. Solid and liquis
41. Homogenous phase (True solution) having size range of
Correct : D. <0.01 µm
42. Heterogeneous phase (Coarse dispersion) having size range of …
Correct : C. 10 to 1000 µm
43. Solubility of Drug can be improved by…
Correct : D. Addition of Surface active agent
44. Targeting of drugs to specific organs can be achieved by
Correct : A. Liposomes
45. The following statement is appropriate for Molecular Dispersion
Correct : C. Does not scatter light
46. The following statement is NOT appropriate for Molecular dispersion
Correct : A. Shows tyndall effect
47. The following statement is true for Colloidal dispersion
Correct : D. All of above
48. In _____Colloids, dispersed particles have a greater affinity to the dispersion medium.
Correct : A. Lyophilic colloids
49. Dispersion of rubber or polystyrene in benzene or ethyl methyl ketone is referred to as________
Correct : B. Lyophilic colloids
50. Lyophobic colloids can be prepared by
Correct : D. All of above
51. A .......... is a mixture in which one substance of microscopically dispersed insoluble particles is
suspended through another substance.
Correct : A. Suspension
52. Few colloids are translucent because of the ..
Correct : A. Tyndall effect
53. The comparatively fast sedimentation rate of the dispersed phase produced by means of gravity or
other forces this is characteristic of..............
Correct : B. Coarse dispersion
54. The molecule in the molecular dispersion phase have size.............
Correct : C. Less than 1 nm
55. The .......... colloids have strong attraction towards solvents.
Correct : A. Lyophilic
56. .......... is the method accountable for the development of stable dispersion of colloidal particles in
dispersion medium.
Correct : B. Peptization
57. The phenomenon which involves separation of macromolecular solutions into two liquid layers is
called as.........
Correct : D. Coacervation
58. …..is directly proportional to the molecular weight of lyophilic colloid.
Correct : B. Turbidity
59. Flocculated suspensions exhibit the flow of a type:
Correct : C. Plastic
60. A limitation that is NOT related to the falling sphere viscometer:
Correct : D. Plug flow
61. In general, Newtonian fluids are expressed in terms of viscosity. A corresponding expression in nonNewtonian fluids (in terms of viscosity) is:
Correct : A. apparent
62. One of the following is NOT a one point viscometer, but can be used for the same purpose. Pick the
viscometer of this type.
Correct : A. cup and bob
63. Fluidity is a term associated with newtoniam fluids. An equivalent term in plastic flow fluids is:
Correct : C. mobility
64. Dilatant flow is characterized as a reverse phenomenon of:
Correct : C. pseudoplastic flow
65. Deflocculated suspension with high concentration of the dispersed solids exhibits the flow of type:
Correct : A. dilatant
66. In antithixotropy, the down-curve is frequently positioned to: (with respect to up-curve):
Correct : C. right
67. At equilibrium, the thixotropic behavior of a pseudoplastic system exhibit the state of:
Correct : C. sol
68. Which one of the following physical Property is NOT a rheological property?
Correct : C. surface tension
69. The pseudoplastic flow behavior can be explained by:
Correct : A. apparent viscosity
70. Brookfield viscometer is an example of type:
Correct : D. rotating spindle
71. High viscosity indicates one of the following relationships in a system. Which is relevant?
Correct : B. intermolecular attractions are stronger
72. An emulsion of o/w type has the viscosity:
Correct : A. greater than that of the internal phase
73. Creep testing is applied to analyse the viscoelastic property of:
Correct : C. ointments
74. The system that undergoes gel-to-sol transformation is known as:
Correct : D. shear thinning
75. The type of viscosity specified in I.P. (Ostwald viscometer) is:
Correct : C. kinematic viscosity
76. After giving the i.m. injection of procaine penicillin G, the process of forming a depot in the muscle is
due to:
Correct : D. rapid thixotropic recovery
77. Pick the reason for the calibration of an instrument.
Correct : D. to correct the errors in the working of an instrument
78. Plug flow in NOT observed in cone and plate viscometer. The reason is:
Correct : C. shear can be maintained uniformly
79. The term rheology was invented by
Correct : A. Bingham and Crawford
80. According to the Newton's law of viscosity, "The shear stress in flowing fluid is__________ to the
rate of shear."
Correct : B. directly proportional
81. The unit of viscosity is
Correct : A. Newton sec m-2
82. Fluidity is
Correct : D. reciprocal of viscosity
83. Kinematic viscosity is the ratio of dynamic viscosity to the____________
Correct : A. density of the fluid
84. The effect of temperature on the viscosity (η) of a liquid is expressed by
Correct : C. Arrhenius equation
85. The reciprocal of mobility is known as
Correct : B. plastic viscosity
86. Pseudoplastic flow are also known as
Correct : A. shear thinning system
87. Dilatant flow is also known as
Correct : B. shear thickening system
88. Negative Thixotropy is a phenomenon in which there is
Correct : A. increase in viscosity on down curve
89. Which of the following is not a viscometers
Correct : D. Drop weight
90. Which of the following viscometer is also called suspended-level viscometer
Correct : A. Ubbelohde viscometer
91. Pseudoplastic flow is generally exhibited by
Correct : A. Jellies
92. Concentrated solid suspension generally exhibit
Correct : C. Plastic flow
93. Rheology is the
Correct : A. Science or study of the flow of a material.
94. The change in velocity between two planes of liquid which is separated by distance is called
Correct : A. Rate of shear
95. Which of the following viscometer is based on the principle of Stokes' Law.
Correct : B. Falling Sphere Viscometer
96. The resistance of a liquid to flow is termed as
Correct : A. Viscosity
97. A shear stress-shear rate relationship is generally explained in the form of curve i.e. or………
Correct : C. Both of the above
98. The cgs physical unit for kinematic viscosity is ...............
Correct : A. Stokes (St)
99. As the temperature increases, the viscosity of liquid...............
Correct : A. Decreases
100. The curve for a pseudo plastic material rheogram................