Master of Science II (Inorganic Chemistry)
Examination: Oct /Nov 2016 Semester IV (New CGPA)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD
289
Thursday
17/11/2016
02:30 PM
to
05:00 PM
Instrumental Techniques
C
XIII
Instructions: Attempt in all five questions.
Section I is compulsory.
Attempt any two questions from Section II and any two from
Section III
Answer to all questions (Section II and III) should be written
in one answer book.
All questions carry equal marks.
Figures to the right indicate full marks.
Use of log table and calculators in allowed.
Total Marks:70
SECTION I
Q.1 Answer the following: 14
Who discovered X-rays?
Why gases and non-viscous liquids do not exhibit Mössbauer effect?
When Mössbauer effect will occur?
Write a Selection rule for NQR.
What is isothermal/static thermogravimetry?
What is Mössbauer spectrum?
What are ENDOR and ELDOR?
NQR is observed for nuclei with
H2 and D2 can be easily distinguished by neutron diffraction method, why?
What is the wavelength of X-ray when produce using Cu target?
Name the factors affecting DSC curves.
What is Doppler broadening?
Which source is used in ESR spectrometer?
Name X-ray diffraction methods used for investigating the internal structure
compounds.
SECTION II
Q.2 Explain the theory and instrumentation of neutron diffraction method. 07
What are thermo mechanical analyses? Explain its instrumentation. 07
Q.3 Explain the condition qxx qyy qzz in NQR with suitable example. 07
Explain the principle and theory of X-ray diffraction by the crystal. 07
Q.4 Describe the importance of recoilless emission and absorption of X-rays in
Mössbauer spectroscopy.
07
Explain the mechanism of hyperfine interaction in the ESR spectra of organic
radical.
07
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SECTION III
Q.5 The Mössbauer spectrum of Na2Fe(CN)6 consists of a singlet while that of
Na2Fe (CN)5NO shows a quadrupole doublet, Explain the behaviour.
05
What will be the frequency of radiation for resonance for a free electron
placed in the magnetic field strength of 0.3T?
05
Give the applications of thermometric titrations. 04
Q.6 What is mean by thermogravimetry? Describe the features of typical
thermogram by taking any example.
05
The utilized reflecting plane of LiF analyzing crystal has a d value of 2.014Å.
Calculate the wavelength of second order diffracted line which has a value of
50.1.
05
Explain the isomer shift in iron compound in different states of its oxidation. 04
Q.7 Write note on any three of the following: 14
Relation of EFG with the molecular structure of the compounds.
Applications of neutron diffraction method.
Applications of differential thermal analysis (DTA).
Instrumentation of Mössbauer spectrophotometer