Top 250+ Solved Physical Pharmaceutics 2 MCQ Questions Answer
Q. Structured vehicles are also termed as or..............
a. Thickening
b. Suspending agents
c. Both of the above
d. None of the above
Q. ....... is the concentration of globules at the top or bottom of the emulsion.
a. Creaming
b. Cracking
c. Phase inversion
d. State
Q. Which of the following properties of a particle significantly affects the physical, chemical andbiological properties of the drug?
a. density
b. sedimentation
c. size
d. surface area
Q. It is difficult to express the size of particles in a meaningful diameter.
a. irregular in shape
b. irregular surface
c. spherical shape
d. uniform in size
Q. 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
Q. When cumulative percent frequency on a probability scale is plotted against logarithm of the particlesize, 50 percent on the probability scale gives the powder particle diameter of:
a. arithmetic mean
b. arithmetic mode
c. geometric mean
d. harmonic mean
Q. Which one of these distributions is more important in the design of dosage forms?
a. Gaussian
b. normal
c. number
d. weight
Q. In the formulation development of emulsions and suspensions, what type of diameter is important?
a. length number
b. projected
c. sieve
d. stokes
Q. 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
Q. 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
Q. 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
Q. In coulter-counter, as the particles travel through the orifice, the event that occurs is:
a. conductance between the electrodes increases
b. electronic scanners produce photographs for volume measurement
c. resistance between the electrodes increases
d. sedimentation increases
Q. Fisher subsieve sizer is used to determine the surface area of the powder. The surface area ismeasured based on the change in:
a. light transmission of gas that reaches the detector
b. pressure across the compacted powder
c. thermal conductivity of gas across the powdered pack
d. weight of powder when air is passed through the powdered pack