Download RTMNU (Rashtrasant Tukadoji Maharaj Nagpur University) B.Pharma (Bachelor of Pharmacy) 5th Semester 2017 Winter Pharmaceutics V (Physical Pharmacy) Question Paper
B.Pharm Fifth Semester (C.B.S.) Examination
PHARMACEUTICS?V (Physical Pharmacy)
Paper?l
Time : Three Hours] [Maximum Marks : 80
NB. :? (1) Question N0. 1 is compulsory.
(2) Attempt any four questions out of remaining.
(3) All questions carry equal marks.
(4) Draw neat labelled diagram wherever necessary.
(5) Assume suitable data wherever necessary.
1. Attempt any ?ve of the following :
(a) Explain why mixed emulsi?ers produce a more stable emulsion than single emulsi?er.
(b) How the surfactants are classi?ed according to HLB ?
(c) What is Hofmeister series ?
(d) What is critical micelle concentration ? What is its signi?cance ?
(e) What are the factors responsible for Sedimentation of particles ? How they can be
controlled ?
(1) Describe the mechanism by which paIticle gets charged in the medium.
(g) De?ne :
(1) Interfacial tension
(2) Adsorption. 5X4=20
2. (a) Give the applications of colloids. 8
(b) What is effect of electrolyte 0n CMC of surfactants ? 7
3. What is zeta potential ? What is Nernst potential and electrokinetic potential ? How does it control
physical stability of emulsions ? 15
4. Derive the equation for Langmuir?s adsorption isotherm. 15
5. (a) Explain DLVO theory of suspensions. 8
(b) Write a note on controlled ?occulation. 7
6. What is angle of repose ? How it is determined ? What is its signi?cance ? Describe derived
properties of powders. 15
7. Write notes on (any two) :
(a) Porosity, its types and signi?cance
(b) Davies theory of emulsions
(c) Classi?cation of surfactants as per chemical structure. 15
POY?27552
This post was last modified on 19 January 2020