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Roll No. ....................................
(i)
(i) Which of the following organic compound with molecular formula CāāHCāā exhibit only one signal in the IHNMR spectrum,
Total No. of Questions : 11
[Total No. of Printed Pages : 5
(a) 1,1 - dichloropropane
(b) 2,2 - dichloropropane
(c) 1,2 - dichloropropane
(d) 1,3 - dichloropropane
(ii) In the Born-Oppenheimer approximation nuclei are treated as ........ and while electron move around them.
(a) Stationary
(b) Unstable
(c) Excited
(d) None of above
(iii) Raman effect supports :
IJ-519
(a) Wave theory
M.Sc. IIIrd Semester (Reg./ATKT)
(b) Electro-magnetic theory
Examination, 2022-23
(c) Corpuscular theory
Physics
(d) Quantum theory
Paper - IV
Atomic & Molecular Physics
Time : 3 Hours]
[Maximum Marks : 85
Note :- Attempt all questions.
SECTION - 'A'
Objective Type Questions
5x3=15
1.
Choose the correct answer from the following :
(i) Which of the following organic compound with molecular formula CāāHCāā exhibit only one signal in the IHNMR spectrum,
(a) 1,1 - dichloropropane
(b) 2,2 - dichloropropane
(c) 1,2 - dichloropropane
(d) 1,3 - dichloropropane
(ii) In the Born-Oppenheimer approximation nuclei are treated as ........ and while electron move around them.
(a) Stationary
(b) Unstable
(c) Excited
(d) None of above
(iii) Raman effect supports :
(a) Wave theory
(b) Electro-magnetic theory
(c) Corpuscular theory
(d) Quantum theory
(iv) Mossbaeur spectroscopy is used to study.
(a) Nuclear structure with the absorption of X-rays
(b) Nuclear structure with the absorption and reemission of X-rays, part of the electromagnet-netic spectrum
(c) Atomic structure
(d) None of these
(v) Which of the following is used as detectors crystal in ESR Spectrometer.
(a) Silicon tungeston rectifier
(b) Silicon rectifier
(c) Silicon-Boron rectifier
(d) Silicon-quartz rectifier
SECTION - 'B'
Short Answer Type Questions
5x5=25
2.
Explain interaction between nuclear spin and magnetic field.
OR
Define relaxation process.3.
What do you understand by Born-Oppenheimer approximation.
OR
Explain spin-spin coupling between two and more nuclei.4.
What is Raman effect. Explain molecular polarizability in raman effect.
OR
Define dissociation and pre-dissociation.5.
Explain the principle of mossbaure spectroscopy.
OR
Explain quadrupole-splitting?6.
Explain G-value and how it is determined.
OR
Explain the principle of ESR.SECTION - 'C'
Long Answer Type Questions
9x5=45
7.
Explain the concept of nuclear magnetic resonance spectroscopy.
OR
Explain spin-spin coupling between two and more nuclei.8.
Describe vibration course structure of electronic spectra and intensity of vibrational electronic Spectra.
OR
Discuss franck-Condon principle in detail?9.
Explain vibrational - rotational raman-spectra of diatomic molecules.
OR
Give the application of Raman-infrared spectroscopy in the structure determination.10.
Explain the various applications of mossabauer spectroscopy.
OR
By defining mossabauer-effect describe recoilless emission of r-emission?11.
Explain ESR Spectra of free radicals in rotation?
OR
Discuss the splitting of electron, energy levels by the magnetic-field.