Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
B. Pharm. SEMESTER IV • EXAMINATION WINTER • 2016
Subject Code: 2240001 Date: 22-10-2016
Subject Name: Unit Operations-II
Time: 10:30 am 01:30 pm Total Marks: 80
Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Define filtration. Give the types and mechanism of filtration processes.
06

Write a note on conical disc centrifuge.
05

Explain in brief edge-filter.
05
Q.2

Describe theory of filtration.
06

Explain cartridge filter with suitable diagram.
05

Write a note on FBD.
05
Q.3

Draw schematic diagram of molecular distillation and discuss its application in pharma industry.
06

Define 'azeotropes. Write a note on preparation of Absolute alcohol.
05

Liquid mixture of ethanol and water is in equilibrium with a vapor containing ethanol and water at a total pressure of 760 mm.Hg. A sample of vapor indicates that it contains 3.3 moles of ethanol for every 1.7 moles of water. If the liquid has mole fraction of 0.52 ethanol what is relative volatility.
05
Q.4

Define drying. Give the detailed classification of dryers. Give the neatly labeled diagram of spray dryer.
06

Describe the factors affecting evaporation.
05

Write a note on microwave.
05
Q.5

Write a note on rectifying column.
06

Explain Duhring's rule and Raoult's law.
05

Explain climbing film evaporator.
05
Q. 6

Describe the method of drying rate calculation.
06

Explain refrigeration cycles.
05

Explain air conditioning.
05
Q.7

Write a note on HVAC system.
06

Describe with suitable diagram falling film evaporator.
05

Explain the psychrometric chart.
05