R05322203-analytical-instrumentation

Set No. 1

Code No: R05322203

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 ANALYTICAL INSTRUMENTATION (Instrumentation & Control Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Prove that pH of water is 7. (b) Show that pH depends on Temperature & Explain the relationship between pH and emf at different Temperatures. (c) Why do you think temperature Compensation is necessary in Conductivity measurement? Describe a method of temperature compensation. [16] 2. (a) What is Photoelectric effect? Discuss its use. (b) What are Photoelectric Cells? Describe their construction and working. [6+10] 3. With a neat block diagram explain the basic parts of gas Chromatograph.

[16]

4. What do you mean by Dissolved Oxygen? Name and explain a method to measure it. [16] 5. Write short notes on: (a) Charge transfer devices. (b) Barrier-layer cells.

[8+8]

6. Give the block diagram of electronic circuit of an spectro photometer and explain each component. [16] 7. (a) What is the need of electrostatic accelerating system in mass spectrometer? (b) Give the applications of mass spectrometry. (c) Discuss the merits of various types of mass spectrometer.

[6+5+5]

8. discuss in detail the construction and principle of ionization chamber and GM counter and compare them. [16] ⋆⋆⋆⋆⋆

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Set No. 2

Code No: R05322203

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 ANALYTICAL INSTRUMENTATION (Instrumentation & Control Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Define each of the following: i. ii. iii. iv.

Absorption Emission Transmission Refraction.

(b) What are the different physical properties used in the analytical instruments? Define them and give example instrument of each. [2+2+2+2+8] 2. (a) Explain the working principle of Hot Wire Thermal Conductivity Analyzer. (b) With a block diagram explain the principle of Gas analyzer based on Gas density. [8+8] 3. (a) What are Syringe type Pumps. Explain the principle by which these are used to deliver mobile phase in the Chromatograph. (b) Name the different mobile phase delivery system in Chromatographs and explain any one. [8+8] 4. How do you analyze Dissolved oxygen? Explain.

[16]

5. (a) Explain in detail with necessary diagram the Echellette grating. (b) Write short notes on holographic gratings.

[8+8]

6. (a) Briefly explain about the hollow cathode lamps used in atomic absorption spectroscopy. (b) Discuss about the burners and flames for atomic absorption spectcoscopy. [8+8] 7. (a) In NMR spectroscopy, what are the advantages of using a magnet with as great a field strength as possible. (b) Explain the difference between a continuous wave and a Fourier transform NMR. [8+8] 8. Explain in detail with a neat sketch the measurement of ionizing current using DC Ionizing chamber. [16] ⋆⋆⋆⋆⋆

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Set No. 3

Code No: R05322203

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 ANALYTICAL INSTRUMENTATION (Instrumentation & Control Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Prove that pH of water is 7. (b) Show that pH depends on Temperature & Explain the relationship between pH and emf at different Temperatures. (c) Why do you think temperature Compensation is necessary in Conductivity measurement? Describe a method of temperature compensation. [16] 2. (a) With a neat sketch explain the analysis of Nitric Oxide using CO Laser. (b) Discuss Laser-Opto Acoustic Detector for the detection of nitric oxides. [8+8] 3. (a) List out the characteristics of the ideal detector for gas Chromatography (b) Explain Thermal Conductivity Detector for Gas Chromatography.

[8+8]

4. (a) Draw and explain OXYMAT-M Oxygen analyzer. (b) With a neat characteristic curve explain Polarographic Cell.

[8+8]

5. (a) State and explain the Beer- Lambart law. (b) If the order used in an echelle grating is 70 and a dispersion angle 60 degrees, groove density 80/ mm and focal length 0.5m, obtain the reciprocal linear dispersion and resolution. [6+10] 6. Explain in detail about the atomic emission and absorption spectroscopy and where they are using? [16] 7. Explain in detail about the wide line NMR.

[16]

8. (a) Discuss the variation of count rate with voltage using suitable counter. (b) What is the dead time of the counter? Explain. ⋆⋆⋆⋆⋆

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[10+6]

Set No. 4

Code No: R05322203

III B.Tech II Semester Supplimentary Examinations, Aug/Sep 2008 ANALYTICAL INSTRUMENTATION (Instrumentation & Control Engineering) Time: 3 hours Max Marks: 80 Answer any FIVE Questions All Questions carry equal marks ⋆⋆⋆⋆⋆ 1. (a) Write short notes on i. Importance of Buffer Solution in pH measurement ii. Nernst Equation. (b) With neat sketch explain the conductivity method for the measurement of SO2 in the air sample. [8+8] 2. (a) With a neat sketch explain the analysis of Nitric Oxide using CO Laser. (b) Discuss Laser-Opto Acoustic Detector for the detection of nitric oxides. [8+8] 3. Define Chromatography. Explain the principles of Gas Chromatography and Liquid Chromatography. Name two applications of each. [16] 4. (a) Draw and explain OXYMAT-M Oxygen analyzer. (b) With a neat characteristic curve explain Polarographic Cell.

[8+8]

5. (a) State and explain the Beer- Lambart law. (b) If the order used in an echelle grating is 70 and a dispersion angle 60 degrees, groove density 80/ mm and focal length 0.5m, obtain the reciprocal linear dispersion and resolution. [6+10] 6. (a) Discuss the calibration method adopted for IR spectrometer. (b) Give the advantages of FT spectroscopic technique. 7. Explain in detail about the wide line NMR.

[8+8] [16]

8. What is a semiconductor detector? Explain the advantages in the sense of working principle compared to other radio active detectors. [16] ⋆⋆⋆⋆⋆

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