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Posted By: sasi kala Member Level: Diamond Posted Date: 30 May 2008
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2007 Anna University B.E Chemical CH 245 — INSTRUMENTAL METHODS OF ANALYSIS Question paper
B.E./B.Tech. DEGREE EXAMINATION,
Fourth Semester
Chemical Engineering
CH 245 — INSTRUMENTAL METHODS OF ANALYSIS
Time : Three hours Maximum : 100 marks
Answer ALL questions.
PART A — (10 ? 2 = 20 marks)
1. What is meant by electromagnetic radiation?
2. State Beer-Lambert's law.
3. Explain the principle of scanning double-beam spectrophotometer.
4. What are the advantages of photometric titration?
5. Define specific refractometry and molecular refractivity.
6. Write any two applications of polarimetry.
7. Write Nernst equation.
8. Define single electrode potential.
9. State Mosley's law.
10. Write the important requirements of a carrier gas in gas chromatograph.
PART B — (5 ? 16 = 80 marks)
11. Write a note on the following : (4 ? 4 = 16)
(i) Sources of radiation and detectors in UV spectroscopy.
(ii) Thermo gram of CaC2O4H2O.
(iii) Ion selective electrodes.
(iv) Reference electrodes.
12. (a) (i) Limitations and deviations of Beer-Lambert's law. (8)
(ii) Explain briefly Duboscq calorimetry with neat diagram. (8)
Or
(b) (i) What is IR spectroscopy? Explain the different region of IR. (8)
(ii) Discuss the source, important parts and detectors of IR spectroscopy. (8)
13. (a) Explain the principle, instrumentation and applications of AAS. (16)
Or
(b) Explain the principle, instrumentation and applications of refractometry.
(16)
14. (a) Explain the measurement of PH by potentiometry and discuss the advantages. (16)
Or
(b) (i) What is X-ray diffraction? (4)
(ii) How X-rays are produced and detected by X-ray diffraction? (12)
15. (a) Write a note on
(i) Thermometric method of analysis and its applications. (8)
(ii) Differential thermal analysis and its applications. (8)
Or
(b) Discuss briefly the principle, apparatus used and its working and advantages of HPLC. (16)
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