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Seat No.: Enrolment No.
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GUJARAT TECHNOLOGICAL UNIVERSITY
B.PHARM - SEMESTER- 1 EXAMINATION - SUMMER -2019
Subject Code: 2210001 Date: 28-05-2019
Subject Name: Unit Operation-I
Time: 10:30 AM TO 01:30 PM Total Marks: 80
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Instructions:
1. Attempt any five questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Explain principle, construction, working, advantages and disadvantages of 06
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Swenson Walker crystallizer with the help of a diagram.(b) Explain Mier’s Super saturation theory. Discuss its limitations and applications 05
(c) Write a note on spherical crystallization. 05
Q.2 (a) Write a note on construction, principle, working, advantages, disadvantages and 06
Applications of fluid energy mill.
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(b) Explain factor affecting size reduction. 05(c) Explain in detail Kick’s theory, Bond’s theory and Rittinger’s theory for energy 05
requirements in size reduction.
Q.3 (a) Enumerate methods for determination of particle size. Write a note on Sieve 06
Shaker.
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(b) Give the classification of powders based on size and list the specification and 05standard for sieves
(c) Describe the construction, working; and uses of cyclone separator with the help 05
of a diagram
Q.4 (a) Write a note on mechanism and theory of mixing 06
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(b) Give examples of high shear and low shear mixers. Explain degree of mixing. 05(c) Explain in detail the Planetary mixer. 05
Q.5 (a) With a neat diagram explain the advantages and disadvantages of double cone 06
Mixer.
(b) Write a note on solvents used for extraction. 05
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(c) Differentiate maceration and percolation along with examples 05 Q.6 (a) Define extraction and explain theory of extraction 06
(b) Explain in detail flow level measurement in automated process control system 05
(c) What is caking of crystals? Explain methods for prevention of caking of 05
crystals
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Q.7 (a) What are possible industrial hazards? How can they be controlled? 06
(b) Write a note on waste water treatment in pharmaceutical industry. 05
(c) Write a note on temperature measurement in automated process control system 05
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