MCQOPTIONS
Saved Bookmarks
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.
| 151. |
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» B. particles are packed closely | |
| 152. |
In _____Colloids, dispersed particles have a greater affinity to the dispersion medium. |
| A. | Lyophilic colloids |
| B. | Lyophobic colloids |
| C. | Association colloids |
| D. | Molecular colloids |
| Answer» B. Lyophobic colloids | |
| 153. |
An emulsion of o/w type has the viscosity: |
| A. | greater than that of the internal phase |
| B. | greater than that of the vehicle |
| C. | less than that of the internal phase |
| D. | less than that of the vehicle |
| Answer» B. greater than that of the vehicle | |
| 154. |
The stability of acacia in water is due to: |
| A. | formation of micelles |
| B. | hydration of solids |
| C. | lowering interfacial tension |
| D. | presence of electrical charge |
| Answer» C. lowering interfacial tension | |
| 155. |
Climatic zone II is |
| A. | Moderate climate |
| B. | Subtropical and Mediterranean climate |
| C. | Hot/dry climate |
| D. | Hot/humid climate |
| Answer» C. Hot/dry climate | |
| 156. |
Sieving method is used for size distribution analysis of powder. The disadvantage of this method is: |
| A. | agglomerates can be identified |
| B. | attrition of powder is possible |
| C. | large number of sieves are required |
| D. | tedious and time consuming |
| Answer» C. large number of sieves are required | |
| 157. |
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» C. it is an injectable preparation | |
| 158. |
Hydrosol refers to a system in which the dispersed phase and dispersion medium, respectively, are: |
| A. | gas and water |
| B. | liquid and water |
| C. | solid and water |
| D. | water and solid |
| Answer» D. water and solid | |
| 159. |
According to schulze-Hardy rule, the precipitating power increases rapidly with the |
| A. | Presence of valence or charge of the ions |
| B. | Lowering the interfacial tension |
| C. | Decreasing the freezing point |
| D. | Elevationof boiling point |
| Answer» B. Lowering the interfacial tension | |
| 160. |
The expiry date for a tablet is not mentioned on the label. It means that the expiry time in years is: |
| A. | five years |
| B. | nil |
| C. | three years |
| D. | two years |
| Answer» B. nil | |
| 161. |
1 micrometer (µm) is equal to |
| A. | 10-5 m |
| B. | 10-6 m |
| C. | 10-7 m |
| D. | 10-8 m |
| Answer» C. 10-7 m | |
| 162. |
Rate of reaction is the |
| A. | number of reactant molecules or atoms that take part in chemical reactions to give the products. |
| B. | sum of exponents or powers of concentration terms in the rate equation |
| C. | time required for reactant concentration to decrease to 90% of the initial concentration. |
| D. | speed at which chemical reaction takes place |
| Answer» E. | |
| 163. |
Which one of these distributions is more important in the design of dosage forms? |
| A. | Gaussian |
| B. | normal |
| C. | number |
| D. | weight |
| Answer» E. | |
| 164. |
The powder having low bulk density or large bulk volume is known as |
| A. | Light powder |
| B. | Heavy powder |
| C. | Bulk powder |
| D. | Granular powder |
| Answer» B. Heavy powder | |
| 165. |
After giving the i.m. injection of procaine penicillin G, the process of forming a depot in the muscle isdue to: |
| A. | high yield value |
| B. | low consistency |
| C. | low yield value |
| D. | rapid thixotropic recovery |
| Answer» E. | |
| 166. |
The ratio of void volume to bulk volume is known as |
| A. | Bulk density |
| B. | Tapped density |
| C. | Porosity |
| D. | Granule volume |
| Answer» B. Tapped density | |
| 167. |
Under ultramicroscope, colloid particles appear as: |
| A. | bright specks against dark background |
| B. | concentric rings |
| C. | dark specks against bright background |
| D. | fluorescent specks |
| Answer» B. concentric rings | |
| 168. |
In chemical kinetics, the rate of a reaction is expressed as (-dc/dt), where dc refers to theconcentration. Whose concentration does it refer to? |
| A. | catalyst |
| B. | product |
| C. | reactant |
| D. | solvent medium |
| Answer» D. solvent medium | |
| 169. |
A maximum sedimentation volume will be obtained when zeta potential is: |
| A. | negative |
| B. | neutral |
| C. | positive |
| D. | zero |
| Answer» E. | |
| 170. |
In the study of the rate of a reaction, 100 ml of 0.1 N hydrochloric acid is added to 10 ml methylacetate for the reaction to occur. The reason for making such a proportion is to make: |
| A. | analysis of degradation is easy |
| B. | reaction to follow first order |
| C. | reaction to proceed slowly |
| D. | reaction to undergo a pseudo first order |
| Answer» E. | |
| 171. |
Electrodialysis method is employed in the colloidal chemistry for the purpose of : |
| A. | Indentification |
| B. | preparation |
| C. | Purification |
| D. | Stabilization |
| Answer» D. Stabilization | |
| 172. |
Which of the following viscometer is based on the principle of Stokes' Law. |
| A. | Cup and Bob viscometer |
| B. | Falling Sphere Viscometer |
| C. | Cone and plate viscometer |
| D. | Rotational viscometer |
| Answer» C. Cone and plate viscometer | |
| 173. |
Targeting of drugs to specific organs can be achieved by |
| A. | Liposomes |
| B. | Emulsion |
| C. | Syrup |
| D. | Suspension |
| Answer» B. Emulsion | |
| 174. |
The molecule in the molecular dispersion phase have size............. |
| A. | Less than 10 nm |
| B. | More than 1 nm |
| C. | Less than 1 nm |
| D. | More than 10 nm |
| Answer» D. More than 10 nm | |
| 175. |
In foams, the dispersed phase and dispersion medium, respectively, are: |
| A. | gas and liquid |
| B. | gas and solid |
| C. | liquid and gas |
| D. | solid and gas |
| Answer» B. gas and solid | |
| 176. |
If Carr's compressibility index value is in between 26 to 31, then flow will be |
| A. | Poor |
| B. | Excellent |
| C. | Passable |
| D. | Very, very poor |
| Answer» B. Excellent | |
| 177. |
In injections, procaine undergoes the degradation reactions in the following sequence: |
| A. | decarboxylation and hydrolysis |
| B. | hydrolysis and decarboxylation |
| C. | hydrolysis, decarboxylation and oxidation |
| D. | oxidation, decarboxylation and hydrolysis |
| Answer» C. hydrolysis, decarboxylation and oxidation | |
| 178. |
Methyl cellulose is a polymer, which is of a type: |
| A. | anionic |
| B. | amphilytic |
| C. | cationic |
| D. | non-ionic |
| Answer» E. | |
| 179. |
In the degradation studies of aspirin suspension, the orders observed initially and at the end,respectively, are: - |
| A. | first, second |
| B. | first, zero |
| C. | second, first |
| D. | zero, first |
| Answer» E. | |
| 180. |
A wetting agent is included in the formulation of a suspension, particularly when the suspendedparticles: |
| A. | are hydrophobic |
| B. | are more denser than the vehicle |
| C. | are water soluble |
| D. | have lesser interfacial tension |
| Answer» B. are more denser than the vehicle | |
| 181. |
In the photochemical degradation of multisulpha preparation, the order that the reaction follows is: |
| A. | first |
| B. | pseudo first |
| C. | second |
| D. | zero |
| Answer» E. | |
| 182. |
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» B. Degree of flocculation | |
| 183. |
An example for colloidal systems is: |
| A. | clays and gels |
| B. | ointments and pastes |
| C. | solutions of soaps and proteins |
| D. | suspensions and emulsions |
| Answer» D. suspensions and emulsions | |
| 184. |
In the determination of size, shape and structure of colloidal particles, which one of the following CANNOT be used? |
| A. | electron microscope |
| B. | instrument measuring light scattering |
| C. | Langmuir film balance |
| D. | ultramicroscope |
| Answer» E. | |
| 185. |
Which type of colloidal material is used commonly in the preparation of a structured vehicle? |
| A. | association |
| B. | hydrophilic |
| C. | hydrophobic |
| D. | inorganic |
| Answer» C. hydrophobic | |
| 186. |
Porosity of a porous powder is defined as: |
| A. | bulk volume/void volume |
| B. | void volume/bulk volume |
| C. | void volume/true volume |
| D. | true volume/bulk volume |
| Answer» C. void volume/true volume | |
| 187. |
A .......... is a mixture in which one substance of microscopically dispersed insoluble particles issuspended through another substance. |
| A. | Suspension |
| B. | Colloid |
| C. | Emulsion |
| D. | None of the above |
| Answer» B. Colloid | |
| 188. |
..........suspension involves individual particle settling. |
| A. | Flocculated |
| B. | Deflocculated |
| C. | Both of the above |
| D. | None of the above |
| Answer» C. Both of the above | |
| 189. |
The porosity of powder is equal to |
| A. | Ratio of void volume to bulk volume. |
| B. | Sum of void volume to bulk volume |
| C. | Product of void volume to bulk volume |
| D. | Void volume only |
| Answer» B. Sum of void volume to bulk volume | |
| 190. |
In the hydrolysis of sucrose in hydrochloric acid solution, the change in the optical rotation followsthe order: |
| A. | pseudofirst |
| B. | pseudo zero |
| C. | second |
| D. | zero |
| Answer» B. pseudo zero | |
| 191. |
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» C. increase in stability | |
| 192. |
Which of the following is a reversible phenomenon |
| A. | Creaming |
| B. | Coalescence |
| C. | Breaking |
| D. | All of the above |
| Answer» B. Coalescence | |
| 193. |
During storage, crystal growth is observed in a suspension due to: |
| A. | absorption of water |
| B. | fluctuations in the ambient temperatures |
| C. | presence of suspending agent |
| D. | volatilization of solids |
| Answer» C. presence of suspending agent | |
| 194. |
Density of oily phase increased by addition of ....... |
| A. | Butter |
| B. | Coconut oil |
| C. | water |
| D. | brominated oils |
| Answer» D. brominated oils | |
| 195. |
Emulsion have a ......... shelf life |
| A. | short |
| B. | no |
| C. | large |
| D. | none of the above |
| Answer» B. no | |
| 196. |
Creep testing is applied to analyse the viscoelastic property of: |
| A. | emulsions |
| B. | lotions |
| C. | ointments |
| D. | suspensions |
| Answer» D. suspensions | |
| 197. |
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» E. | |
| 198. |
Dispersion of rubber or polystyrene in benzene or ethyl methyl ketone is referred to as________ |
| A. | Hydrophilic colloids |
| B. | Lyophilic colloids |
| C. | Lyophobic colloids |
| D. | Hydrophobic colloids |
| Answer» C. Lyophobic colloids | |
| 199. |
Heterogeneous phase (Coarse dispersion) having size range of … |
| A. | 0.5 to 1.0 µm |
| B. | 10 to 100 µm |
| C. | 10 to 1000 µm |
| D. | 1 to 10 µm |
| Answer» D. 1 to 10 µm | |
| 200. |
Auxiliary emulsifying agents are used to stabilize the emulsion. They act on the principle: |
| A. | adjusting the HLB value |
| B. | strengthening the nonpolar tails of the emulsifier ^ |
| C. | strengthening the polar heads of the emulsifier |
| D. | thickening the continuous phase |
| Answer» E. | |