Download SGBAU BSc 2019 Summer 2nd Sem Industrial Chemistry Question Paper

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B.Sc. (Part—I) Semester—II Examination

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INDUSTRIAL CHEMISTRY (R/V)

Time : Three Hours] [Maximum Marks : 80

Note :

1. Question No. 1 is compulsory and carries 8 marks.
2. Remaining all six questions carry 12 marks each.

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3. Use of scientific calculator is allowed.
4. Draw diagram wherever necessary.

1. (A) Fill in the blanks :

1. Adsorption phenomenon occurs at _________ solid only.
2. The differences in _____ pressures of different components of a liquid mixture forms the basis of distillation.

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3. Percolation of a liquid through a fixed bed of solid is called as _________.
4. Vacuum crystallisation is used for _________ sensitive materials.

(B) Choose the correct alternatives :

1. Kick’s law is associated with this unit operation :
   (a) Screening (b) Mixing
   

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   (c) Size Reduction (d) Filtration
2. Axial flow and radial flow are the types of :
   (a) Impellers (b) Turbines
   (c) Paddles (d) Propellers
3. The dryer commonly used for getting material in the continuous sheet form such as paper and cloth is :
   

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   (a) Tray dryer (b) Spray dryer
   (c) Rotary dryer (d) Drum dryer
4. Which of the following statements is not true in case of chemical adsorption ?
   (a) Caused by Chemical bond formation
   (b) It is reversible
   

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   (c) Increases with increase in temperature
   (d) Forms unimolecular layer

1. Define adsorption.
2. What is screening ?
3. Define drying.

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4. What is evaporator economy ?

UNIT—I

2. (A) Explain short tube evaporator. (4)
(B) Give an account of forced circulation evaporator. (4)
(C) Describe packed column for distillation. (4)

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OR

3. (P) Discuss bubble cap tray in plate column distillation. (4)
(Q) Explain continuous distillation with rectification and stripping. (4)
(R) Give an account of climbing film evaporator. (4)

UNIT—II

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4. (A) Describe spray column extractor. (4)
(B) Discuss the properties of a solvent used in liquid-liquid extraction. (4)
(C) Give an account of rotocel. (4)

OR

5. (P) Explain Kennedy extractor. (4)

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(Q) Discuss countercurrent multiple contact (Shank’s system). (4)
(R) Describe mixer and settler as extracting equipment. (4)

UNIT—III

6. (A) Discuss the construction and working of vacuum crystalliser. (6)
(B) Give an account of spray dryer with respect to its construction and working. (6)

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OR

7. (P) Give the construction and working of tray dryer. (6)
(Q) Explain construction and working of Oslo cooler crystalliser. (6)

UNIT—IV

8. (A) Give an account of jaw crusher. (4)

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(B) Describe Trommel screens. (4)
(C) Discuss the characteristics of filter medium. (4)

OR

9. (Q) Discuss ball mill. (4)
(R) Explain the principle of cake filtration. (4)

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UNIT—V

10. (A) Give an account of mixing of liquids with liquids. (6)
(B) Explain tumbling mixers. (6)

OR

11. (P) Discuss ribbon blender. (6)

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(Q) Explain :
(i) Banbury mixer. (3)
(ii) Pug mills. (3)

UNIT—VI

12. (A) Explain any four applications of adsorption. (4)

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(B) Give an account of mechanism of adsorption. (4)
(C) Discuss any four properties of a catalyst. (4)

OR

13. (P) Give an account of Langmuir adsorption isotherm. (4)
(Q) Explain :

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(i) Autocatalysis.
(ii) Catalyst deactivation. (4)

(R) Discuss the mechanism of catalysis through intermediate compound formation. (4)

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