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.
| 201. |
Which one of them is refered as a general rate equation (-dc/dt) for a second order? |
| A. | A°B° |
| B. | A1B1 |
| C. | A1B2 |
| D. | A2B2 |
| Answer» C. A1B2 | |
| 202. |
Which one of the following is primarily NOT a chemical decomposition? |
| A. | isomerisation |
| B. | hydrolysis |
| C. | oxidation |
| D. | volatilization |
| Answer» E. | |
| 203. |
…..is directly proportional to the molecular weight of lyophilic colloid. |
| A. | Solubility |
| B. | Turbidity |
| C. | Density |
| D. | None of the above |
| Answer» C. Density | |
| 204. |
Normally preservatives are added to an emulsion. One of the following statements is true. |
| A. | amount of the preservative added is below minimum inhibitory concentration |
| B. | emulsifier should enhance the preservative action |
| C. | preservatives remain in the aqueous phase |
| D. | preservatives stay in the oil phase |
| Answer» D. preservatives stay in the oil phase | |
| 205. |
The critical value of zeta potential (in milli volts) for a stable colloid (except gold sol) is: |
| A. | from 20 to 50 |
| B. | from 50 to 100 |
| C. | less than 20 |
| D. | mor than 100 |
| Answer» B. from 50 to 100 | |
| 206. |
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» B. dispersion method | |
| 207. |
The continuous collisions between the colloidal particles and molecules of dispersion mediumproduce zigzag movement of colloidal particles which is known as |
| A. | Brownian movement |
| B. | Tyndall effect |
| C. | Diffusion |
| D. | Sedimentation |
| Answer» B. Tyndall effect | |
| 208. |
The time required for the complete degradation of a drug in solution is a finite value. The order ofthat reaction is: |
| A. | first |
| B. | pseudo first |
| C. | second |
| D. | zero |
| Answer» E. | |
| 209. |
For an ideal suspension, the sedimentation volume should be: |
| A. | equal to one |
| B. | less than one |
| C. | more than one |
| D. | zero |
| Answer» B. less than one | |
| 210. |
The semipermeable membrane used in haemodialysis is: |
| A. | cellophane |
| B. | cellulose acetate |
| C. | polyethene |
| D. | polyvinyl acetate |
| Answer» B. cellulose acetate | |
| 211. |
The units for the specific rate constant for a second order reaction are: |
| A. | liter/moles.sec |
| B. | liter.sec/moles |
| C. | moles/liter.sec |
| D. | moles.sec/liter |
| Answer» B. liter.sec/moles | |
| 212. |
The system that undergoes gel-to-sol transformation is known as: |
| A. | elastic |
| B. | permanent deformation |
| C. | shear thickening |
| D. | shear thinning |
| Answer» E. | |
| 213. |
Surfactant solutions are termed as association colloids when their concentrations are: |
| A. | insufficient to saturate the bulk phase |
| B. | insufficient to saturate the interface |
| C. | less than critical micellar concentration (cmc) |
| D. | more than cmc |
| Answer» E. | |
| 214. |
For a stable emulsion, the phase volume ratio is generally about: |
| A. | 26/74 |
| B. | 52/48 |
| C. | 74/26 |
| D. | 74/100 |
| Answer» C. 74/26 | |
| 215. |
The following statement is appropriate for Molecular Dispersion |
| A. | Diffusion rate is slow |
| B. | Impermeable across semipermeable membrane |
| C. | Does not scatter light |
| D. | Particle size less than 1.0 µm |
| Answer» D. Particle size less than 1.0 µm | |
| 216. |
....... 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» E. | |
| 217. |
Electrodialysis is used, when impurities in a sol are: |
| A. | amphiphiles |
| B. | colloids |
| C. | electrolytes |
| D. | nonelctrolytes |
| Answer» D. nonelctrolytes | |
| 218. |
The integral equation (in common notation) k = x/at (a - x) is concerned with the order: |
| A. | first |
| B. | pseudo first |
| C. | second |
| D. | zero |
| Answer» D. zero | |
| 219. |
Porosity is expressed in |
| A. | Percentage |
| B. | Millimeter |
| C. | Gram/Millimeter |
| D. | Newton |
| Answer» B. Millimeter | |
| 220. |
In Dry gum method, 4:2:1 consist of |
| A. | 4 parts oil, 2 parts water, and 1 part emulsifier |
| B. | 4 parts water, 2 parts oil, and 1 part emulsifier |
| C. | 4 parts emulsifier, 2 parts water, and 1 part emulsifier |
| D. | 4 parts oil, 2 parts emulsifier and 1 part water |
| Answer» B. 4 parts water, 2 parts oil, and 1 part emulsifier | |
| 221. |
The conversion of trans-stilbene to cis-stilbene follows the molecularity: |
| A. | bimolecular |
| B. | termolecular |
| C. | unimolecular |
| D. | zeromolccular |
| Answer» D. zeromolccular | |
| 222. |
…...is the diameter of a sphere having, the same observed area as the particle when viewed normal toits most stable plane. |
| A. | The surface diameter (ds) |
| B. | The projected diameter (dp) |
| C. | The volume diameter (dv) |
| D. | The Stokes diameter (dst) |
| Answer» C. The volume diameter (dv) | |
| 223. |
Negative Thixotropy is a phenomenon in which there is |
| A. | increase in viscosity on down curve |
| B. | increase in viscosity on up curve |
| C. | decrease in viscosity on down curve |
| D. | decrease in viscosity on up curve |
| Answer» B. increase in viscosity on up curve | |
| 224. |
Which of the following viscometer is also called suspended-level viscometer |
| A. | Ubbelohde viscometer |
| B. | Capillary viscometer |
| C. | Ostwald viscometer |
| D. | Cone and plate viscometer |
| Answer» B. Capillary viscometer | |
| 225. |
The solid state decomposition of aspirin in presence of moisture follows the order: |
| A. | first |
| B. | pseudofirst |
| C. | second |
| D. | zero |
| Answer» E. | |
| 226. |
..........is produced by forcing a liquid to course through a stationary solid phase. |
| A. | Electrosmosis |
| B. | Electrophoresis |
| C. | The sediment potential |
| D. | The streaming potential |
| Answer» E. | |
| 227. |
Particle size with diameter of 0.5-1.0 Micrometers (µm) is useful for…….. |
| A. | Emulsions |
| B. | Suspensions |
| C. | Both of the above |
| D. | None of the above |
| Answer» D. None of the above | |
| 228. |
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» E. | |
| 229. |
The flocculated suspension is one in which zeta potential of particle is…… . |
| A. | -05 to +05 mV |
| B. | -10 to+10 mV |
| C. | -20 to+20 mV |
| D. | -30 to+30 mV |
| Answer» D. -30 to+30 mV | |
| 230. |
The type of a particle diameter obtained largely depends on: |
| A. | method by which it is determined |
| B. | nature of the powder |
| C. | procedure by which it is calculated |
| D. | way it is defined and described |
| Answer» B. nature of the powder | |
| 231. |
A prescription of liquid aspirin preparation contained 6.5 g/100 ml. The solubility of aspirin at 25°Cis 0.33 g/100 ml. The order of reaction in the kinetic study is: |
| A. | apparent first |
| B. | apparent zero |
| C. | first |
| D. | second |
| Answer» C. first | |
| 232. |
Solutions of proteins and starch in water are the examples of the colloidal type: |
| A. | hydrophilic |
| B. | hydrophobic |
| C. | lyophilic |
| D. | lyophobic |
| Answer» B. hydrophobic | |
| 233. |
Emulsion is |
| A. | stable preparation |
| B. | thermodynamically unstable preparation |
| C. | biphasic system |
| D. | B & C |
| Answer» E. | |
| 234. |
For the validity of accelerated stability studies of solution dosage form, the energy of activationshould be in the range of (in units of kcal/mole). |
| A. | 0 to 10 |
| B. | 11 to 30 |
| C. | 31 to 50 |
| D. | 51 to 70 |
| Answer» C. 31 to 50 | |
| 235. |
In the determination of the gold number of a protective colloid, the endpoint is indicated by: |
| A. | measuring the change in particle size |
| B. | noting sedimentation volume of gold |
| C. | observing the color change |
| D. | weighing of the precipitate |
| Answer» D. weighing of the precipitate | |
| 236. |
When coulter-counter apparatus is employed for powder analysis, the following criterion is important: |
| A. | dispersion medium should be colored |
| B. | dispersion medium should be conducting |
| C. | suspended particles should be charged |
| D. | suspended particles should be spherical |
| Answer» C. suspended particles should be charged | |
| 237. |
Downward creaming means ........ rate of sedimentation |
| A. | negative |
| B. | positive |
| C. | same |
| D. | no change |
| Answer» B. positive | |
| 238. |
Few colloids are translucent because of the .. |
| A. | Tyndall effect |
| B. | Splitting effect |
| C. | Scattering |
| D. | None of the above |
| Answer» B. Splitting effect | |
| 239. |
......is the alteration in the shape and the size of a body owing to applied external forces and internalforces. |
| A. | Deformation |
| B. | Formation |
| C. | Conjugation |
| D. | None of the above |
| Answer» B. Formation | |
| 240. |
The size of a sphere is freely stated in terms of its............. |
| A. | Area |
| B. | Diameter |
| C. | Radius |
| D. | Volume |
| Answer» C. Radius | |
| 241. |
In case of emulsions, the viscosity immediately after preparation and during storage, respectively, willbe: |
| A. | higher and will gradually decrease |
| B. | higher and gradually increase |
| C. | lower and gradually decrease |
| D. | lower and gradually increase |
| Answer» D. lower and gradually increase | |
| 242. |
Which of the following is used as antioxidants for emulsified systems |
| A. | Dodecyl gallate, |
| B. | Butylated hydroxyanisole (BHT), |
| C. | Butylated hydroxytoluene (BHT) |
| D. | All of the above |
| Answer» E. | |
| 243. |
While using sedimentation method for size analysis, addition of a deflocculating agent to a suspensionis necessary in order to: |
| A. | accelerate the process of sedimentation |
| B. | make the particles spherical |
| C. | prevent the aggregation |
| D. | satisfy Reynolds number |
| Answer» D. satisfy Reynolds number | |
| 244. |
In high concentrations, electrolytes destabilize a lyophilic sol by a process termed as : |
| A. | coagulation |
| B. | dilution |
| C. | salting out |
| D. | solvation |
| Answer» D. solvation | |
| 245. |
Fluidity is a term associated with newtoniam fluids. An equivalent term in plastic flow fluids is: |
| A. | apparent viscosity |
| B. | flexibility |
| C. | mobility |
| D. | plastic viscosity |
| Answer» D. plastic viscosity | |
| 246. |
In sol, the dispersed phase and dispersion medium are |
| A. | Solid and liquis |
| B. | Liquid and liquid |
| C. | Solid and solid |
| D. | Liquid and Gas |
| Answer» B. Liquid and liquid | |
| 247. |
Which one of the following can be designated as the molecularity of a reaction? |
| A. | half |
| B. | one |
| C. | one and half |
| D. | zero |
| Answer» C. one and half | |
| 248. |
During autoclaving of dextrose solution, a straw colour is observed. It is due to the presence of asubstance called: |
| A. | furfural |
| B. | 5-hydroxymethylfurfural |
| C. | 5-hydroxyfurfural |
| D. | 5-methylfurfural |
| Answer» C. 5-hydroxyfurfural | |
| 249. |
The specific rate constant (k) determined for aspirin hydrolysis in pH 1.0 buffer at 1 mg/mlconcentration is 2.0x10-3 min-1 at 25°C. The shelf life of the product is (in minutes): |
| A. | 2.0 |
| B. | 52 |
| C. | 104 |
| D. | 346 |
| Answer» C. 104 | |
| 250. |
The density of the dispersed phase is more than that of the dispersion medium. According to theStokes' 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» D. in upward direction | |