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, 2017
Time 3 Hours. Full Marks 80
Answer any FIVE Questions.
All questions carry equal marks.
1. State and explain the Franck-Condon principle. How is Franck-Condon principle helpful in
predicting the relative intensities of vibronic transition
2. Distinguish between pure rotational spectrum and vibration rotational spectrum of molecule.
How are they different from electronic spectrum
3. Answer the following
Define infrared spectrum.
Infrared active and inactive vibration.
4. Write in details the application of Mossbauer spectra to some of compounds of Fe .
5. Answer the following
Explain d-d transition.
In UV spectrum, the electronic band is usually broad.
I.R. Selection rule in I.R. spectroscopy.
6. What are applications of ESR in the study of organic and simple Inorganic radicals
7. Discuss various type of electronic transition. Explain the effect of solvent in this transitions, if
any. Identify the type of transition possible in following compounds
Acetone
Transition Metal Complex
Aromatic Carbonyl.
8. What is meant by the chemical shift in nmr spectroscopy. Describe the factors affecting
chemical shift. Explain the fine structure (Spin-Spin-Coupling).
9. Derive spectroscopic terms for p² configuration and write down Hund's rule to find out ground
state term.
10. Write notes on any Two of the following
Selection rule in I.R. Spectroscopy
Quantum theory
Vibrational Raman Spectra