N A L A N D A O P E N U N I V E R S I T Y
M.Sc. Chemistry, Part-II
PAPER-IX
(Spectroscopy)
Annual Examination, 2016
Time 3 Hours. Full Marks 80
Answer any FIVE Questions.
All questions carry equal marks.
1. What are the necessary conditions for a compound to be infrared active
Distinguish between the following on the basis of I. R. Spectroscopy.
CH 3CH 2CHo CH 3Co CH 3
2. Give an account of how Raman spectra of diatomic molecule give valuable information about
their molecular structure and other parameter.
3. Taking suitable examples, explain the mechanism of Melafferty rearrangment by taking
suitable examples.
4. How you will distinguish between cis and trans-isomers with the help of nmr
Why do atoms gives rise to line spectra while molecules show band spectra.
5. What is electron spin resonance Give details experimental technique.
6. Discuss the principle of NMR spectroscopy and explain how this technique is used in
elucidating of the structure of the molecules
7. Describe and explain K-band (Konjugierate), R-band (Radikalartig), B-band
(Benzenerid) and E-band (Ethylenic) in electronic spectra.
8. What do you mean by zero point energy Draw potential energy curve of diatomic molecule
undergoing an harmonic oscillation and write P.E. expression.
9. Answer the following
Explain d-d transition.
In uv spectrum, the electronic band is usually broad.
10. Write notes on any Two of the following
Charge Transfer Complexes Bands)
Franck-Condon Principle
Chemical shift in nmr spectroscopy.