Download University of Jaffna, Sri Lanka B.Pharma 3rd Year 2013 July 3102 Pharmaceutics III Question Paper

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Time:02 Hours
(60 marks)
(40 marks)
UNIVERSITY OF JAFFNA, SRILANKA
BACHELOR OF PHARMACY
THIRD YEAR FIRST SEMESTER EXAMINATION (Old syllabus) ? July2013
PHACE 3102 PHARMACEUTICS III - PAPER II
Date: 21.10.2013
ANSWER ALL EIGHT QUESTIONS.
1.1 Explain the factors that affect dissolution rate of drugs.
1.2 Write note on steady state diffusion.
2.
2.1 What is a colloid? (10 marks)
2.2
Describe the different types of colloids.
(60 marks)
2.3
List the applications of colloids in pharmaceutical products?
(30 marks)
3.
3.1
List the properties of a suspension.
(20 marks)
3.2
Briefly explain the role of interfacial properties in the stability of
(80 marks)
suspension.
4. Briefly describe the
4.1
different types of non Newtonian system with the help of graphs.
(60 marks)
4.2
mechanism of thixotropy.
(40 marks)
5.1 List the pharmaceutical application of interfacial phenomena. (20 marks)
5.2 Describe how the surface tension of a liquid can be measured (40marks)
byDunuoytensiometer?
5.3
List the pharmaceutical applications of surfactants.
(40marks)
6.
6.1 List the factors influencing the cohesion of powders? (15 marks)
6.2 How cohesion of powder can be determined using Jenike cell? (45 marks)
6.3
How can the flow property of powder be improved?
(40 marks)
7.
7.1 Describe the structure and pharmaceutical uses of cyclodextrins. (60 marks)
7.2 Briefly explain the functions of Bentonite in Calamine lotion (40 marks)
8. Write an account on
8.1 prevention of oxidation of drugs. (30 marks)
8.2 preparation of gels. (40 marks)
8.3 significance of photochemistry in pharmacy. (30 marks)
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