MCQOPTIONS
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MCQOPTIONS
This section includes 925 Mcqs, each offering curated multiple-choice questions to sharpen your GPAT knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The resistance of a liquid to flow is termed as |
| A. | Viscosity |
| B. | Density |
| C. | In ter facial tension |
| D. | Surface tension |
| Answer» B. Density | |
| 102. |
....... is the concentration of globules at the top or bottom of the emulsion. |
| A. | Creaming |
| B. | Cracking |
| C. | Phase inversion |
| D. | State |
| Answer» B. Cracking | |
| 103. |
.......... is the method accountable for the development of stable dispersion of colloidal particles indispersion medium. |
| A. | Coacervation |
| B. | Peptization |
| C. | Flocculation |
| D. | Coagulation |
| Answer» C. Flocculation | |
| 104. |
Stokes’ law cannot be used, if Reynolds number is more than: |
| A. | 0.2 |
| B. | 1.8 |
| C. | 9.0 |
| D. | 18.0 |
| Answer» B. 1.8 | |
| 105. |
High repose angle of the granules indicated: |
| A. | bulk density of the granules |
| B. | porosity of the granules |
| C. | roughness of the granule surface |
| D. | smoothness of the granule surface |
| Answer» D. smoothness of the granule surface | |
| 106. |
Acetates and Citrates are |
| A. | Buffering agent |
| B. | Colouring agents |
| C. | Thickening agent |
| D. | Flocculating agents |
| Answer» B. Colouring agents | |
| 107. |
Which one of the following properties is extensively applied for determining the molecular weight ofpolymer? |
| A. | depression of freezing point |
| B. | elevation of boiling point |
| C. | lowering of vapour pressure |
| D. | osmotic pressure |
| Answer» E. | |
| 108. |
A limitation that is NOT related to the falling sphere viscometer: |
| A. | Applicable to only less viscous liquids |
| B. | Large volume of sample is required |
| C. | Needs the sample to be transparent |
| D. | Plug flow |
| Answer» E. | |
| 109. |
Dilatant materials are frequently called as............... |
| A. | strain-thinning systems |
| B. | shear-thickening systems |
| C. | shear-thinning systems |
| D. | strain-thinning systems |
| Answer» C. shear-thinning systems | |
| 110. |
Rheology is the |
| A. | Science or study of the flow of a material. |
| B. | Study of particle size |
| C. | Study of formation of colloids |
| D. | Study of formation of complex |
| Answer» B. Study of particle size | |
| 111. |
Protective colloids DO NOT: |
| A. | aid in dispersion |
| B. | decrease the zeta potential |
| C. | lower the interfacial tension |
| D. | offer a mechanical barrier |
| Answer» D. offer a mechanical barrier | |
| 112. |
Which of the following are the desired features of good suspension: |
| A. | The particles which settle down should not deposit at the bottom as hard cake. They must be easily re-suspended by moderate shaking. |
| B. | It should be free from grittiness. |
| C. | It should be stable in case of physical, chemical and microbial attack. |
| D. | All of the above |
| Answer» E. | |
| 113. |
The reciprocal of mobility is known as |
| A. | Apparent viscosity |
| B. | plastic viscosity |
| C. | Dynamic viscosity |
| D. | Kinematic viscosity |
| Answer» C. Dynamic viscosity | |
| 114. |
The change in velocity between two planes of liquid which is separated by distance is called |
| A. | Rate of shear |
| B. | Shearing stress |
| C. | Strain |
| D. | Yield value |
| Answer» B. Shearing stress | |
| 115. |
Which of the following is not the cause of Instability in emulsion |
| A. | Upward Creaming |
| B. | Phase inversion |
| C. | Downward creaming |
| D. | Mottling |
| Answer» E. | |
| 116. |
The accelerated stability studies are primarily used to determine: |
| A. | energy of the activation of the reaction |
| B. | k value at elevated temperatures |
| C. | k value at the room temperature |
| D. | shelf life of the product |
| Answer» E. | |
| 117. |
In general, reaction rate constants in neutral pH are comparatively: |
| A. | equal |
| B. | higher |
| C. | lower |
| D. | zero |
| Answer» D. zero | |
| 118. |
Structured vehicles are also termed as or.............. |
| A. | Thickening |
| B. | Suspending agents |
| C. | Both of the above |
| D. | None of the above |
| Answer» D. None of the above | |
| 119. |
When a series of steps are involved in a reaction, the ‘overall rate’ of a reaction depends upon therate(s) of: |
| A. | all steps |
| B. | all steps which follow the slowest step |
| C. | all steps which precede the slowest step |
| D. | the slowest step |
| Answer» D. the slowest step | |
| 120. |
The type of viscosity specified in I.P. (Ostwald viscometer) is: |
| A. | absolute viscosity |
| B. | dynamic viscosity |
| C. | kinematic viscosity |
| D. | viscosity coefficient |
| Answer» D. viscosity coefficient | |
| 121. |
Which of the following is the half life of first order reaction |
| A. | t1/2 = A0/2k |
| B. | t1/2 = 0.693/2k |
| C. | t1/2 = 2k |
| D. | t1/2 = 0.693/k |
| Answer» E. | |
| 122. |
According to the Newton's law of viscosity, "The shear stress in flowing fluid is__________ to therate of shear." |
| A. | Inversely proportional |
| B. | directly proportional |
| C. | Square root |
| D. | Perpendicular |
| Answer» C. Square root | |
| 123. |
Aspirin undergoes decomposition in a formulation. It can be prevented by: |
| A. | adding a chelating agent |
| B. | adding an antioxidant |
| C. | protecting it from light |
| D. | suppressing its solubility |
| Answer» E. | |
| 124. |
The unit of rate constant for second order reaction is |
| A. | litre.mole-2 sec-2 |
| B. | litre.mole-2 sec-1 |
| C. | litre |
| D. | litre.mole-1 sec-1 |
| Answer» E. | |
| 125. |
The movement of colloidal particles through a liquid under the influence of electric field is called |
| A. | Electrophoresis |
| B. | Electro-osmosis |
| C. | Electro chemical reaction |
| D. | Electrodialysis |
| Answer» B. Electro-osmosis | |
| 126. |
Pick the reason for the calibration of an instrument. |
| A. | most of the instruments are not reliable |
| B. | to calculate the constant for the instrument |
| C. | to calculate the relative property |
| D. | to correct the errors in the working of an instrument |
| Answer» E. | |
| 127. |
In the stability of emulsion, which important instability step should be prevented? |
| A. | Breaking |
| B. | Coalescence |
| C. | Flocculation |
| D. | Creaming |
| Answer» C. Flocculation | |
| 128. |
Which of the following DO NOT form colloid spontaneously? |
| A. | association |
| B. | lyophilic |
| C. | lyophobic |
| D. | micellar |
| Answer» D. micellar | |
| 129. |
Calcium hydrogen phosphate is dissolved in water. The apparent zeta potential initially is: |
| A. | negative |
| B. | neutral |
| C. | positive |
| D. | zero |
| Answer» B. neutral | |
| 130. |
Which one of the following emulsifier is used to stabilise the emulsion of W/O type |
| A. | SLS |
| B. | Span 20 |
| C. | Tween 20 |
| D. | Tragacanth |
| Answer» C. Tween 20 | |
| 131. |
A variety of factors would influence the rate of creaming in an emulsion.The factor open to formulation pharmacist is to regulate: |
| A. | density of dispersion medium |
| B. | density of dispersed phase |
| C. | globule size |
| D. | volume of dispersion medium |
| Answer» D. volume of dispersion medium | |
| 132. |
The rheological property of emulsion can be controlled by |
| A. | nature and concentration of emulsifying system |
| B. | particle size of dispersed phase |
| C. | viscosity of continuous phase |
| D. | All of the above |
| Answer» E. | |
| 133. |
Concentrated solid suspension generally exhibit |
| A. | Dilatant flow |
| B. | Pseudoplastic flow |
| C. | Plastic flow |
| D. | All of the above |
| Answer» D. All of the above | |
| 134. |
......... technique is utilized in presence single reactant for determination of order of reaction. |
| A. | Half Life Method |
| B. | Graphical Method |
| C. | Initial Rate Method |
| D. | Van't Hoff Differential Method |
| Answer» C. Initial Rate Method | |
| 135. |
Stability Data for Climatic zone III & IV comes under___________ICH guideline |
| A. | Q1C |
| B. | Q1E |
| C. | Q1F |
| D. | Q1D |
| Answer» D. Q1D | |
| 136. |
The dielectric constant is used to measure |
| A. | Viscosity of solvent |
| B. | polarity of the solvent |
| C. | temperature of solvent |
| D. | flowability of solvent |
| Answer» C. temperature of solvent | |
| 137. |
Helium Pycnometer is used to determine |
| A. | Size |
| B. | True density |
| C. | Sedimentation rate |
| D. | Surface area |
| Answer» C. Sedimentation rate | |
| 138. |
Dilatant flow is also known as |
| A. | shear thinning system |
| B. | shear thickening system |
| C. | Elastic deformation |
| D. | Plastic deformation |
| Answer» C. Elastic deformation | |
| 139. |
O/W emulsions normally cream ......... |
| A. | up first & down then |
| B. | upward |
| C. | downward |
| D. | none of the above |
| Answer» C. downward | |
| 140. |
A substance is dissolved in water. The suspension has exhibited a negative apparent zeta potential.Identify the related substance. |
| A. | aluminum chloride |
| B. | bismuth subnitrate |
| C. | gelatin |
| D. | sulfaguanidine |
| Answer» E. | |
| 141. |
Near CMC, micelles of the surfactant molecules assume the shape of |
| A. | spherical |
| B. | layered |
| C. | rod shaped |
| D. | cylindrical |
| Answer» B. layered | |
| 142. |
At equilibrium, the thixotropic behavior of a pseudoplastic system exhibit the state of: |
| A. | gel |
| B. | paste |
| C. | sol |
| D. | wax |
| Answer» D. wax | |
| 143. |
If zeta potential of a suspension is high, then the system will be considered as |
| A. | Deflocculation |
| B. | Flocculation |
| C. | Emulsion |
| D. | Sedimentation |
| Answer» B. Flocculation | |
| 144. |
The flocculated suspensions sediment............. |
| A. | Slowly |
| B. | Quickly |
| C. | More quickly |
| D. | None of the above |
| Answer» D. None of the above | |
| 145. |
Lyophobic colloids can be prepared by |
| A. | Chemical method |
| B. | Peptization method |
| C. | Electric arc method |
| D. | All of above |
| Answer» E. | |
| 146. |
In a second-order reaction, the sum of the exponents in the rate law is equal to............... |
| A. | Zero |
| B. | One |
| C. | Two |
| D. | Three |
| Answer» D. Three | |
| 147. |
The value of t1/2 for second order reaction is |
| A. | 1/ak |
| B. | 0.693/k |
| C. | Ao/2k |
| D. | Ao/2 |
| Answer» B. 0.693/k | |
| 148. |
When a beam of light is pass through a colloidal solution, the path of light gets illuminated. Thisphenomenon is known as |
| A. | Brownian movement |
| B. | Diffusion |
| C. | Tyndall effect |
| D. | Donnan effect |
| Answer» D. Donnan effect | |
| 149. |
Penicillin G is prepared as a salt of procaine penicillin G. Now the rate of decomposition of penicillinG will be: |
| A. | increased |
| B. | reduced |
| C. | unchanged |
| D. | unpredictable |
| Answer» C. unchanged | |
| 150. |
The term Micromeritics was given by |
| A. | J.M. Dalla Valle |
| B. | James Kelvin |
| C. | William Procter |
| D. | Mahadeva Lai Schroff |
| Answer» B. James Kelvin | |