MCQOPTIONS
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MCQOPTIONS
This section includes 58 Mcqs, each offering curated multiple-choice questions to sharpen your Bachelor of Pharmacy (BDot Pharma) knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
...is the diameter of a sphere having, the same observed area as the particle when viewed normal to its 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) | |
| 52. |
During autoclaving of dextrose solution, a straw colour is observed. It is due to the presence of a substance called: |
| A. | furfural |
| B. | 5-hydroxymethylfurfural |
| C. | 5-hydroxyfurfural |
| D. | 5-methylfurfural |
| Answer» C. 5-hydroxyfurfural | |
| 53. |
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 | |
| 54. |
Normally, ethyl acetate undergoes hydrolysis in presence of H+ and (OH)-ions. The order of the reaction observed in the acidic and alkaline solutions, respectively, are: |
| A. | first and second |
| B. | pseudo first and second |
| C. | second and first |
| D. | second and pseudo first |
| Answer» C. second and first | |
| 55. |
The reaction rate constant (k) is 2.0 x 10-3 min.-1 for aspirin hydrolysis in 0.1 N hydrochloric acid at 1mg/ml concentration. Under same conditions, if the product contains aspirin 4 mg/ml of the initial concentration, the k value in minutes-1 will be: |
| A. | 0.5 x l0-3 |
| B. | 2.0 x 10-3 |
| C. | 4.0 x 10-3 |
| D. | 8.0 x 10-3 |
| Answer» C. 4.0 x 10-3 | |
| 56. |
The comparatively fast sedimentation rate of the dispersed phase produced by means of gravity or other forces this is characteristic of.............. |
| A. | Colloidal dispersion |
| B. | Coarse dispersion |
| C. | Both of the above |
| D. | None of the above |
| Answer» C. Both of the above | |
| 57. |
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. | |
| 58. |
Name the type of colloidal dispersion to which electrolytes are normally added in small quantities to stabilize: |
| A. | association |
| B. | lyophilic |
| C. | lyophobic |
| D. | micellar |
| Answer» D. micellar | |