(DCHE01)
Total No. of Questions 12] [Total No. of Pages 02
M.Sc. (Previous) DEGREE EXAMINATION, MAY- 2018
First Year
CHEMISTRY
General Chemistry
Time 3 Hours Maximum Marks :70
SECTION A
Answer any four of the following questions.(4 x 71/2 30)
Q1)Explain sources of radiations used in molecular spectroscopy.
Q2)Write the important components and basic principle of NMR spectroscopy.
Q3)By taking an example, explain the electronic spectrum of a diatomic molecule.
Q4)By taking as example, explain the rotational spectrum of a diatomic molecule .
Q5)Explain student test.
Q6)How do you collect gaseous samples for analysis in atmosphere?
Q7)Write the important components and their functions of a micro computer.
Q8)Write a program for solving van der waals' equation.
SECTION B
Answer all of the following questions. Choosing one from each unit.
x 10 40)
Unit I
Write about the interaction of radiation with matter in molecular
spectroscopy.
OR
Write the important components, working principle and applications of ESR
Spectroscopy.
(DCHE01)
Unit II
Q10)a) Explain the classification of bands in UV and visible spectroscopy with
suitable examples.
OR
Write about various sources and detectors used in different regions of infrared
spectroscopy.Give the applications of IR spectroscopy.
Unit III
Q11)a) How do you evaluate random errors by following statistical procedures.
OR
Write about the collection of different liquid samples for analysis. What are
the precautions to be taken in the preservation of samples.
Unit IV
Q12)a) Explain READ and WRITE with E formats.
OR
Write a programme and flow chart for rate constant of a first order reaction.

(DCHE02)
Total No. of Questions [Total No. of Pages 02
M.Sc. (Previous) DEGREE EXAMINATION, MAY- 2018
First Year
CHEMISTRY
Inorganic Chemistry
Time Hours Maximum Marks :70
SECTION A
Answer any four of the following questions.(4 x 71/2 30)
Q1)Explain photoelectric effect.
Q2)Explain wave function and its physical interpretation.
Q3)Write the postulates of valence bond theory.Explain bonding in H2 molecule
according to V.B. Reory.
Q4)Explain born Haber cycle.
Q5)Write about splitting of orbitals in tetrahedral complexes by taking an
example.
Q6)Draw and explain the Orgel diagram of a complex with an example.
Q7)Explain the synthesis and properties of diborane.
Q8)By taking an example, explain the inner sphere mechanism.
SECTION B
Answer all of the following questions.
Choosing one from each unit.(4 x 10 40)
UNIT I
Q9) Explain schrodinger wave equation for an electron in a box.
OR
Discuss the atomic spectra of alkali metals.
(DCHE02)
UNIT II
Q10)a) Give an account on LCAO approach and explain bonding with suitable
examples.
OR
Write the properties and applications of molecular crystals and covalent
crystals.
UNIT III
Q11)a) How do you determine the stability constants of a complex by pH metric
method?
OR
How do you explain the magnetic and color of transition metal ions?
UNIT IV
Q12)a) Write about classification of labile and inert complexes according to crystal
field theory. Give examples.
OR
Write the synthesis, properties and structure of silicones.

(DCHE03)
Total No. of Questions 12] [Total No. of Pages 02
M.Sc. (Previous) DEGREE EXAMINATION, MAY 2018
First Year
CHEMISTRY
Organic Chemistry
Time 3 Hours Maximum Marks :70
SECTION A
Answer any four questions. × 71/2 30)
Q1) Explain about Aromaticity with examples.
Q2) Write a note on effect of conformation on reactivity in cyclohexane derivatives.
Q3) Explain structure and reactivity of carbocation and carbanions.
Q4) Explain the neighbouring group mechanism with examples.
Q5) Write a not on Gattermann Koch reaction.
Q6) Explain the Sandmeyer reaction.
Q7) Explain addition of Grignard reagents to carbonyl and unsaturated carbonyl
compounds.
Q8) Write a note on E1 and E1CB mechanism.
SECTION B
Answer all questions. × 10 40)
Q9) Explain the following.
Cross conjugation
ii) Resonance
OR
Explain about stereospecific and stereoselective synthesis.
(DCHE03)
Q10) Explain methods of determining mechanisms isotopic effects.
OR
Explain SN1 and SN2 mechanism.
ii) Explain about SN1 mechanism.
Q11) Write a note on generation and characteristics of free radicals.
OR
Hydroboration
ii) Michael reaction
Q12) Explain the following:
Knoevenagel
ii) Mannich
iii) Perkin reactions
OR
Write a note on mechanism and orientation in pyrolytic elimination.

(DCHE04)
Total No. of Questions 12] [Total No. of Pages 02
M.Sc. (Previous) DEGREE EXAMINATION, MAY 2018
First Year
CHEMISTRY
Physical Chemistry
Time 3 Hours Maximum Marks :70
SECTION A
Answer any four of the following questions. × 71/2 30)
Q1) Define entropy and write about entropy changes in isolated systems.
Q2) Describe classius Clayperon equation.
Q3) Explain the theory of α decay by giving examples.
Q4) Write about schotky and Frenkel defects in crystals.
Q5) Define cell EMF and its measurement.
Q6) Write about micelles and reverse micelles.
Q7) Write the mechanism of homogeneous catalysis reaction with an example.
Q8) State and explain Laws of photochemistry.
SECTION B
Answer all questions. Choosing one from each unit.
× 10 40)
Unit I
Q9) Write about partial molar quantities and Van't Hoff's equation.
OR
Derive thermodynamic phase rule.
Unit II
Q10) Write the principle and applications of Isotope dilution analysis and
radiometric titrations.
OR
Explain Miller indices and labelling of planer.
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Unit III
Q11) How do you determine cell concentration without transference?
OR
Explain specific conductance and equivalent conductance. Write about their
variation with concentration.
Unit IV
Q12) Write Lindmann's theory of reaction rates.
OR
Define quantum yield of a photochemical reaction and reactional with high
and low quantum yields.