M.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Third Semester
Chemistry
ANALYTICAL INSTRUMENTATION
(CBCS 2015 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions in about 100 words each.
1. State Bragg's law.
2. Write any two advantages of X-ray method.
3. Give the basic principle of NMR.
4. What is hyper Raman effect?
5. What is the essential requirement for a solvent to be used
in UV Spectroscopy?
6. Why is ethanol a good solvent in UV?
7. Distinguish between TGA and DSC.
8. Define change in enthalpy.
9. What is the principle of AFM?
10. What is the principle of SEM?
Sub. Code
536703
RW-961
2
wk12
Part B x 5 25)
Answer all questions choosing either or
11. List out the limitations of X-ray diffraction.
Or
Write a short note on X-ray detectors.
12. Describe the working principle of Laser Raman
Spectrometer.
Or
With neat diagram explain the working principle of
NMR and sample preparation techniques.
13. Explain the applications of UV absorption
spectrometry.
Or
Explain in detail applications of photoluminescence
spectrometry.
14. With neat block diagram explain working principle
of Differential Scanning Calorimetry.
Or
Discuss in detail the mechanical principles of DSC.
15. Explain the working principle of AFM and
calculation of RMS value.
Or
Write a short note on contact and non-contact mode
of AFM.
RW-961
3
wk12
Part C x 10 30)
Answer any three questions.
16. Explain the principle and working of X-ray fluorescence
spectrometer.
17. With neat illustration explain the working principle of
ESR spectrometer.
18. What are filters? Enumerate the role of filters and
detectors in UV-absorption spectrometry.
19. Explain the working principle of TGA.
20. Describe the principle, construction and working of
ESCA.
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