Dr. A.P.J. Abdul Kalam University
Master of Science (Chemistry)
Second Semester Main Examination, June-2021
Group Theory & Spectroscopy-II [MSC204T]
Time: 3:00 Hrs Max Marks 85
Note: Attempt all questions. All questions carry equal marks.
Q.1 (a) What happens when a spinning nucleus is placed in a magnetic field?
Explain in Details?
(b) Explain in details the term ‘Chemical shift’ and its measurements.
OR
(e) What do you mean by Chemically equitation +protons? Explain with
example?
(f) Write the structure formulae for the compounds with the following
formulae that show only one signal in their PMR Spectra
(i) C5 H12
(ii) C3H6
(iii) C2H6O
Q.2 (a) Explain electric field gradient and coupling constant.
(b) Write a note on Quadruple moment.
OR
(e) Discuss the theory of NQR
(f) What are the applications of NQR?
Q.3 (a) Explain the difference between ESR & NMR?
(b) Explain Mosley’s law?
OR
(a) Discuss different components of ESR spectrometer and its experimental
techniques.
(b) Write in details the types of Hyperfine interactions?
Q.4 (a) Deduce Bragg’s equitation and find the distance between successive lattice
planes in crystal.
(b) Calculate the distance d in rock salt if its density is 2.18 g/cc and
molecular weight 58.5?
OR
(a) Explain in detail the factor causing Neutron diffraction and its measuring
& techniques.
(b) Explain in detail scattering techniques & scattering anyes. Explain the
elucidation of structure of simple gas phase molecular by electron
diffraction studies?
Q.5 (a) What is weir equation.
(b) Explain Low energy Electron diffraction (LEED)?
OR
(a) What is X-Ray diffraction and Bragg’s law.
(b) The interaction of an Unpaired electron with N14 causes a Splitting of
there lines while with Mn55 in gives six lines why?
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