BPH/III/23
Professional Course Examination, November 2018
Pre-CBCS
3rd Semester
BACHELOR OF PHARMACY
Paper No. 23
Pharmaceutical Unit Operation—II
Full Marks 40
Time 2 hours
The figures in the margin indicate full marks for the questions
Answer any eight questions
1. Explain the fundamental factors for selection of the location of
pharmaceutical industry. 5
2. What are the different ferrous metals used for making pharmaceutical
machineries? 2
What are the different types of glass used in pharmaceutical industry
as per IP? 3
3. Differentiate between heat exchanger and heat interchanger with
examples. 2
Calculate the amount of heat that will flow through a sheet of steel
10 m in thickness, 0·6 m wide and 1 m long in 30 minutes with a
temperature of 70 °C on one side and 30 °C on the other side. Assume
the thermal conductivity of water as 43 W/m.K. 2
Define blackbody. Write the equation of Stefan-Boltzmann for heat
flow through radiation process. ½+½=1
/491 1 Contd.
4. Define evaporation. Explain different factors influencing rate of
evaporation.
5. Define Raoult's law. What are constant boiling mixtures? How will you
separate?
6. Describe the principles and applications of steam distillation. 5
7. Define the following terms ½×4=2
Bound water
Unbound water
Hygroscopic substance
Equilibrium moisture content
Write the formula to calculate the following 1×3=3
loss on drying
moisture content
Drying rate
8. Explain the importance of size reduction in Pharmaceutical Technology. 5
9. Give the difference between leaching and expression. Explain the
importance of temperature in the extraction of active principles.
10. Write a note on boiling point composition curve mixture. 5