McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Bachelor of Pharmacy (B. Pharma) , Pharmacy .
Chapters
| 101. |
In psedoplastic flow as shear stress increases, shear rate............... |
| A. | Increases |
| B. | Increases but linear |
| C. | Increases but not linear |
| D. | Decreases |
| Answer» C. Increases but not linear | |
| 102. |
Dilatant materials are frequently called as............... |
| A. | strain-thinning systems |
| B. | shear-thickening systems |
| C. | shear-thinning systems |
| D. | strain-thinning systems |
| Answer» B. shear-thickening systems | |
| 103. |
The Rheogram of thixotropic material determined by................... |
| A. | Duration through which sample is exposed to any one shear rate. |
| B. | Rate at which shear increased or decreased. |
| C. | Both of the above |
| D. | None of the above |
| Answer» C. Both of the above | |
| 104. |
....... is the isothermal and moderately slow recovery on standing of material of which stability lost owing to shearing. |
| A. | Thermochemistry |
| B. | Viscosity |
| C. | Entiotropy |
| D. | Thixotropy |
| Answer» D. Thixotropy | |
| 105. |
......is the alteration in the shape and the size of a body owing to applied external forces and internal forces. |
| A. | Deformation |
| B. | Formation |
| C. | Conjugation |
| D. | None of the above |
| Answer» A. Deformation | |
| 106. |
A wetting agent is included in the formulation of a suspension, particularly when the suspended particles: |
| A. | are hydrophobic |
| B. | are more denser than the vehicle |
| C. | are water soluble |
| D. | have lesser interfacial tension |
| Answer» A. are hydrophobic | |
| 107. |
For a flocculated suspension, one of the following criterion is satisfied or established |
| A. | High inter-particle repulsions |
| B. | strong inter-particle attractions |
| C. | weak inter-particle attractions |
| D. | weak inter-particle repulsions |
| Answer» C. weak inter-particle attractions | |
| 108. |
In stokes’ relationship, a parameter that greatly changes the velocity of settling is: |
| A. | density of the liquid |
| B. | density of particle |
| C. | radius of the particle |
| D. | viscosity of the medium |
| Answer» C. radius of the particle | |
| 109. |
The protamine-zinc insulin suspension is prepared by a method viz.,: |
| A. | altered pH precipitation |
| B. | dispersion method |
| C. | double decomposition |
| D. | organic solvent precipitation |
| Answer» A. altered pH precipitation | |
| 110. |
Methyl cellulose is a polymer, which is of a type: |
| A. | anionic |
| B. | amphilytic |
| C. | cationic |
| D. | non-ionic |
| Answer» D. non-ionic | |
| 111. |
For a flocculated suspension the degree of flocculation is observed to be one. The sedimentation volume is also 1 (one). These values, respectively, indicate the limits: |
| A. | lower and lower |
| B. | lower and upper |
| C. | upper and lower |
| D. | upper and upper |
| Answer» B. lower and upper | |
| 112. |
For an ideal suspension, the sedimentation volume should be: |
| A. | equal to one |
| B. | less than one |
| C. | more than one |
| D. | zero |
| Answer» A. equal to one | |
| 113. |
In case of suspensions, all statements below are true EXCEPT that: |
| A. | it contains a suspending agent |
| B. | it does not include a preservative |
| C. | it is an injectable preparation |
| D. | it is an oral preparation |
| Answer» B. it does not include a preservative | |
| 114. |
In practice, an acceptable suspension should have particles: |
| A. | of nearly 0.1 micrometer |
| B. | which can be readily re-dispersible after they settle |
| C. | which should form a cake after settling |
| D. | should not settle |
| Answer» B. which can be readily re-dispersible after they settle | |
| 115. |
For oral administration of a suspension to a patient, which one of the factors is the most important? |
| A. | acceptable color and odour |
| B. | polyumorphism |
| C. | specific surface area |
| D. | viscosity |
| Answer» A. acceptable color and odour | |
| 116. |
Which one of the following properties is applicable to suspensions? |
| A. | Brownian movement |
| B. | laminar flow |
| C. | rapid rate of sedimentation |
| D. | strokes’ law |
| Answer» C. rapid rate of sedimentation | |
| 117. |
Suspended particles become flocculated in a suspension, because: |
| A. | attractive forces between particles are appreciable |
| B. | particles are packed closely |
| C. | repulsive forces between particles are appreciable |
| D. | vehicle rejects the particles |
| Answer» A. attractive forces between particles are appreciable | |
| 118. |
Structured vehicle is included in the formulation of a suspension, in order to: |
| A. | decrease the interfacial tension |
| B. | prevent the caking of the sediment |
| C. | prevent the sedimentation of particles |
| D. | reduce the size by chemical me |
| Answer» A. decrease the interfacial tension | |
| 119. |
In the preparation of a structured vehicle, which one of the following substances is used? |
| A. | bismuth subnitrate |
| B. | ethyl alcohol |
| C. | glycerin |
| D. | methyl cellulose |
| Answer» D. methyl cellulose | |
| 120. |
Which type of colloidal material is used commonly in the preparation of a structured vehicle? |
| A. | association |
| B. | hydrophilic |
| C. | hydrophobic |
| D. | inorganic |
| Answer» B. hydrophilic | |
| 121. |
When charcoal powder is dusted on the surface of water, the contact angle (in degrees) that the charcoal exhibits is: |
| A. | zero |
| B. | one |
| C. | 90 |
| D. | 180 |
| Answer» D. 180 | |
| 122. |
A maximum sedimentation volume will be obtained when zeta potential is: |
| A. | negative |
| B. | neutral |
| C. | positive |
| D. | zero |
| Answer» D. zero | |
| 123. |
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» D. sulfaguanidine | |
| 124. |
Calcium hydrogen phosphate is dissolved in water. The apparent zeta potential initially is: |
| A. | negative |
| B. | neutral |
| C. | positive |
| D. | zero |
| Answer» A. negative | |
| 125. |
Which one of these preparations is NOT qualified as a suspension. |
| A. | barium meal for radiodiagnostic use |
| B. | calamine lotion for antiseptic use |
| C. | procaine penicillin G for intramuscular injection |
| D. | vitamin B complex tonic as nutritional supplement |
| Answer» D. vitamin B complex tonic as nutritional supplement | |
| 126. |
The ratio of the ultimate volume of sediment to the actual volume of sediment before settling is called |
| A. | Sedimentation volume |
| B. | Degree of flocculation |
| C. | Emulsification volume |
| D. | phase volume ratio |
| Answer» A. Sedimentation volume | |
| 127. |
The ratio of the sedimentation volume in case of flocculated suspension to the sedimentation volume in case of deflocculated suspension is called |
| A. | Sedimentation volume |
| B. | Degree of flocculation |
| C. | Emulsification volume |
| D. | phase volume ratio |
| Answer» B. Degree of flocculation | |
| 128. |
The size of dispersed particles in coarse dispersion ranges from |
| A. | 1 µm to 100 µm. |
| B. | 1 nm to l00nm |
| C. | 1mm to 100cm |
| D. | Less than 1 µm |
| Answer» A. 1 µm to 100 µm. | |
| 129. |
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» D. All of the above | |
| 130. |
In flocculated suspension, the rate of sedimentation is |
| A. | Low |
| B. | More |
| C. | Zero |
| D. | 50% |
| Answer» B. More | |
| 131. |
If zeta potential of a suspension is high, then the system will be considered as |
| A. | Deflocculation |
| B. | Flocculation |
| C. | Emulsion |
| D. | Sedimentation |
| Answer» A. Deflocculation | |
| 132. |
Which of the following is/are the properties of flocculated suspension? |
| A. | Rate of sedimentation is high |
| B. | On shaking sediment can be easily redispersed |
| C. | It does not form hard cake |
| D. | All of the above |
| Answer» D. All of the above | |
| 133. |
The value of sedimentation volume (F) gives a knowledge about the____________of the suspension |
| A. | physical stability |
| B. | Incompatibility |
| C. | Solubility |
| D. | All of the above |
| Answer» A. physical stability | |
| 134. |
Suspension is example of |
| A. | Biphasic liquid dosage form |
| B. | Solid dosage form |
| C. | Semi-solid dosage form |
| D. | All of the above |
| Answer» A. Biphasic liquid dosage form | |
| 135. |
Acetates and Citrates are |
| A. | Buffering agent |
| B. | Colouring agents |
| C. | Thickening agent |
| D. | Flocculating agents |
| Answer» A. Buffering agent | |
| 136. |
In an emulsion, the velocity of sedimentation is found to be negative. It means that the creaming is: |
| A. | absent |
| B. | in both the directions |
| C. | in downward direction |
| D. | in upward direction |
| Answer» D. in upward direction | |
| 137. |
The density of the dispersed phase is more than that of the dispersion medium. According to the Stokes' equation, the creaming is: |
| A. | at the center of the emulsion |
| B. | in both the directions |
| C. | in downward direction |
| D. | in upward direction |
| Answer» C. in downward direction | |
| 138. |
When oil and water are triturated together, the interfacial free energy was observed to be increased. What does it indicate?: |
| A. | decrease in the interfacial tension |
| B. | decrease in the stability |
| C. | increase in stability |
| D. | stable film formation |
| Answer» B. decrease in the stability | |
| 139. |
For a stable emulsion, the phase volume ratio is generally about: |
| A. | 26/74 |
| B. | 52/48 |
| C. | 74/26 |
| D. | 74/100 |
| Answer» B. 52/48 | |
| 140. |
The HLB range of an emulsifier employed in the preparation of water-in-oil emulsion is: |
| A. | 3 to 6 |
| B. | 7 to 12 |
| C. | 13 to 15 |
| D. | more than 15 |
| Answer» A. 3 to 6 | |
| 141. |
In case of emulsions, the viscosity immediately after preparation and during storage, respectively, will be: |
| A. | higher and will gradually decrease |
| B. | higher and gradually increase |
| C. | lower and gradually decrease |
| D. | lower and gradually increase |
| Answer» C. lower and gradually decrease | |
| 142. |
The distribution of globules is not uniform in an emulsion. This stage is termed as: |
| A. | breaking |
| B. | caking |
| C. | coalescence |
| D. | creaming |
| Answer» D. creaming | |
| 143. |
An o/w microemulsion is prepared using a hydrophilic surfactant. The appearance of the microemulsion is: |
| A. | intense white |
| B. | milky white |
| C. | translucent |
| D. | tr |
| Answer» A. intense white | |
| 144. |
Emulsions are defined as thermodynamically unstable systems. The events that follow sequentially towards instability are: |
| A. | coalescence, breaking, creaming and flocculation |
| B. | coalescence, flocculation, creaming and breaking |
| C. | flocculation, creaming, breaking and coalescence |
| D. | flocculation, creaming, coalescence and breaking |
| Answer» D. flocculation, creaming, coalescence and breaking | |
| 145. |
In the stability of emulsion, which instability step is prevented by emulsifiers?: |
| A. | breaking |
| B. | coalescence |
| C. | creaming |
| D. | flocculation |
| Answer» B. coalescence | |
| 146. |
An ‘emulsion within emulsion’ is designated as: |
| A. | o/w/w |
| B. | w/o/o |
| C. | w/o/o/w |
| D. | w/o/w |
| Answer» D. w/o/w | |
| 147. |
The main function of an emulsifier in the preparation of an emulsion is to: |
| A. | develop a condensed membrane layer film |
| B. | increase the repulsions between globules coming together |
| C. | increase the surface free energy |
| D. | reduce the interfacial tension |
| Answer» A. develop a condensed membrane layer film | |
| 148. |
An emulsifier can be regarded as superior, if its mechanism of action is based on the principle of: |
| A. | developing solid adsorption film |
| B. | forming monomolecular adsorption film |
| C. | generating multimolecular adsorption film |
| D. | increasing interfacial energy |
| Answer» B. forming monomolecular adsorption film | |
| 149. |
An emulsifier is considered to be ideal, if it is soluble in: |
| A. | aqueous, oil and gas phases |
| B. | aqueous phase only |
| C. | both aqueous and oil phase |
| D. | oil phase only |
| Answer» C. both aqueous and oil phase | |
| 150. |
On commercial scale, emulsions are prepared by:: |
| A. | centrifugation |
| B. | dialysis |
| C. | freezing |
| D. | homogenization |
| Answer» D. homogenization | |
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