Dr. A.P.J. Abdul Kalam University MSC (Chemistry) II SEM Group Theory & Spectroscopy-II [MSC204T] June 2021 Question Paper

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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