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Physical Pharmaceutics
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Physical Pharmaceutics
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25 Questions

1. A sample of a powder with true density of 3 g/cm3 and weighing 100 g was found to have bulk volume of 80.33 cm3 when placed in a 100-ml graduated cylinder. Calculate the porosity.
2. Following are used for particle size analysis P. Coulter counter Q. BET N2 adsorption R. XRPD S. HIAC counter
3. The Du-Nouy ring method (Du-Nouy tensiometer) determines _______
4. Higher the HLB value of surfactant, more __________ it is.
5. When one of the reactants is present in such great excess then its concentration may be considered constant or nearly so, the reaction is said to be ________
6. One of the following ingredients improves the flow property of granules in
7. The particle size range of colloidal dispersion is _____.
8. A solvent sheath is formed around the particles of dispersed phase in __________ type of colloidal system.
9. Pseudoplastic flow is typically exhibited by
10. Kelvin equation is related to the
11. Following is related to the air permeability method:
12. Suspension follows _____ kinetics.
13. Wetting agent has - - - - - HLB value.
14. Ordinarily, interfacial tensions are _________ than surface tension.
15. Roto viscometer is a type of _______ viscometer.
16. Following is not used as a measure of flow property of powder:
17. A surfactant X forming poor/no dispersion in water at room temperature will be having an HLB value ______
18. Water is __________ fluid
19. Which of the following method is used to determine the surface area of particles?
20. Following is not the method for determining the surface area of particles:
21. Following gel shows a thixotropic behavior
22. Colloid particle have - - - - - type of rheology.
23. Thixotropy phenomenon can be applied to __________ system.
24. Carr's compressibility index gives an idea about
25. If the Carr's index of a powder is 10% then the type of powder flow is

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