Master of Science II (Inorganic Chemistry)
Examination: Oct Nov 2016 Semester III (New CBCS)
SLR No. Day
Date Time Subject Name Paper
No. Seat No.
SLR SD
283
Wednesday
16/11/2016
02:30 P.M
to
05:00 P.M
Inorganic Chemical
Spectroscopy
C
IX
Instructions: Attempt in all five questions.
Section I is compulsory.
Attempt any two questions from Section II and any two
questions 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 right indicate full marks.
Use of log table and calculators is allowed.
Total Marks:70
SECTION I
Q.1 Answer the following: 14
What is charge transfer spectrum?
Why rotational (microwave) spectroscopy studied only in gaseous state of
atom or molecules?
Name the internal standard used in NMR spectroscopy.
Write a full form of ESCA.
Why water can't be used as a solvent in IR spectroscopy?
Define the term spin-spin coupling.
Arrange the following in increase of order of energy:
n→σ* σ→σ*.
Why 12C, 16O do not show NMR spectra?
Who discovered Raman spectroscopy?
How many modes of vibration occur in H2O molecule?
To which point group does the allene molecule belongs?
What are the radiation sources used in photoelectron spectroscopy?
Write down the symmetry point group of ammonia.
Calculate ground term for d3 ion.
SECTION II
Q.2 Draw and explain the character table for C2v molecular point group. 07
What are the terms in complex with octahedral symmetry correlate with 3p
terms of a free ion with a d2 configuration?
07
Q.3 What are the requirements for a molecule to be Raman active? Explain why
homonuclear diatomic molecules are IR inactive and Raman active?
07
What are local and remote effects in NMR spectroscopy? 07
Q.4 Explain the effect of isotopic dilution in microwave spectrum. 07
Discuss the principle and instrumentation of photoacoustic spectroscopy. 07
SECTION III
Q.5 What are reducible and irreducible representations? Explain with suitable
example.
05
How would you distinguish octahedral and tetrahedral Ni(II) complexes on the
basis of their electronic absorption spectra?
05
A sample was excited by the 4358Å line of mercury. A Raman line was
observed at 4447Å. Calculate the Raman shift in cm-1.
04
Q.6 What is chemical shift? Explain its utility in NMR spectroscopy by giving
suitable example.
05
Give the applications of auger electron spectroscopy. 05
Calculate a reduced mass and moment of inertia of NaCl using the mean
internuclear distance of 2.36Å. The atomic masses are
Na 23 x 10-3 Kg/mole and C1 35 x 10-3 Kg/mole.
04
Q.7 Write a note on any three of the following: 14
Proper and improper axis of rotation
Morse potential energy diagram
Applications of microwave spectroscopy
Difference between Infrared and Raman spectroscopy