M.Sc. (Previous) DEGREE EXAMINATION, MAY First Year CHEMISTRY Paper - I : General Chemistry. Time : 03 Hours Maximum Marks : 80

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1 M.Sc. (Previous) DEGREE EXAMINATION, MAY First Year CHEMISTRY Paper - I : General Chemistry (DCHE 01) Time : 03 Hours Maximum Marks : 80 Part-A (4 x 8 = 32) Answer Any Four questions 1) What are the sources of different radiation in EMR? 2) What are the types of molecular spectroscopy? 3) Why are absorption bands farmed instead of sharp lines in the spectrum? 4) Explain the vibrational structure of an electronic transition in uv-visible spectroscopy? 5) Define the terms accuracy and precision? 6) Describe the significance of T-test? 7) Compare micro, main-frame and super computers? 8) Write a brief note on directed INPUT and OUTPUT statements? Part-B (4 x 12 = 48) Answer All questions 9) a) i) Explain the Rotational spectra of diatomic molecules in microwave spectroscopy? Write a note on Isotopic effect in Rotation spectra?

2 b) i) Show that on the rigid rotor model, the energy difference between the adjacent lines in a rotation spectrum of a diatomic molecule is constant? Explain the basic principle of ESR spectroscopy? 10) a) i) Describe briefly the classification of bands in uv-visible spectroscopy? Explain the vibrational spectra of diatomic molecules in IR spectroscopy? b) i) Explain the vibrational spectra of an harmonic oscillator in IR spectroscopy? Describe the vibrational and Rotational spectra of diatomic molecules in IR spectroscopy? 11) a) Explain the following: i) Precision of mean. i Standard deviation. Confidence intervals. b) i) What is an Error? Explain the types of errors and propagation of errors? Write the measures of centre value and dispersion? 12) a) Write flowchart and program on roots of a quadratic equation-application to hydrogen ion concentration of a strong acid? b) Write flowchart and program on standard deviation and variance of univariate data? E E E

3 M.Sc. (Previous) DEGREE EXAMINATION, MAY First Year CHEMISTRY Paper II : Inorganic Chemistry (DCHE 02) Time : 03 Hours Maximum Marks : 80 Part-A (4 x 8 = 32) Answer Any Four questions 1) Explain the photoelectric effect and Compton effect. 2) Explain the orthogonality and normalization of wave functions. 3) Explain the atomic spectra of alkali metals. 4) Describe the VSEPR theory. 5) Compare VB and MO methods. 6) Describe the John Teller s effect on Oh complexes. 7) Discuss the electronic spectra of complexes with orgel diagrams. 8) Discuss the bonding in metal nitrosyls. Part-B (4 x12 = 48) Answer All questions 9) a) Deduce the schrodinger wave equation for an electron in a box. b) Discuss the variation method and application to determine ground state energy of hydrogen atom

4 10) a) Explain the valence bond approach to H 2 molecule. Discuss the concept of resonance Mo treatment of H 2 molecule. b) Explain the various types of crystals with suitable examples. 11) a) Explain valena bond theory? Discuss its merits and demerits. b) Describe the optical method for the determination of stability constants of complexes. 12) a) Discuss about the inner and outer sphere mechanism. give examples for ligand substitution SN 1 and SN 2 in octahedral complexes. b) Describe the synthesis, properties and structure of carboranes. E E E

5 M.Sc. (Previous) DEGREE EXAMINATION, MAY First Year CHEMISTRY Paper III : Organic Chemistry (DCHE 03) Time : 03 Hours Maximum Marks : 80 Part-A (4 x 8 = 32) Answer Any Four questions 1) What are alternate and non-alternate hydrocarbons. 2) Define the terms Threo and Erythro Isomers? 3) What is Halmnett equation. 4) Give the definition and types of Ambient Nucleophiles. 5) What is Gatter mann Koch reaction. 6) Explain the mechanism of Michael addition reaction with a suitable example. 7) Write a note on hydrolysis of esters. 8) What is E IC B reaction? Explain it with an example? Part-B (4 x12 = 48) Answer any Four questions Unit -I 9) a) i) Indicate the following compounds which are Aromatic, non aromatic, anti Aromatic explain with reasons

6 What are annulenes? Explain the aromatic nature of [1, 4] annulenes and [18] annulenes? b) i) What is Atropisomerism? Explain with suitable examples. Discuss the stereochemistry of allenes. Unit -II 10) a) Arrange the following in the order of stability & & & & i) C6H5CH 2, CH3CH 2, Me2CH, CH2 = CHCH2 i b) i) Explain SN 1 reactions with suitable mechanism and discuss the effect of nature of leaving group and nucleophile in SN 1 reaction. Write about acetolysis of A proceeds times faster than B.

7 Unit -III 11) a) i) Write a short note on sandmeyer reaction. Write a note on free radical rearrangement reactions. b) i) Write a short note on Allylic Halogenation and Auto oxidation. Discuss the mechanism of electrophilic addition to a carbon carbon double bond. Unit -IV 12) a) Carry out the following Transformations b) i) What is E 1 elimination and write the mechanism involved in it? Explain pyrolytic eliminations with suitable examples? E E E

8 (DCHE04) M.Sc. (Previous) DEGREE EXAMINATION, MAY 2015 First Year CHEMISTRY Paper - IV : Physical Chemistry Time : 3 Hours Maximum Marks: 80 SECTION -A (4 8 = 32) Answer any four questions 1) Explain the criteria of equilibrium and Spontaneity of free energy changes in ideal gas. 2) Derive classius clapeyron equation. 3) Discuss various types of radio active decay in elementary treatment. 4) Give the significance of compound nucleus theory. 5) Discuss the relation between electrical and chemical energies. 6) Explain Langmuir adsorption isotherm. 7) Discuss Lindman s theory of unimolecular reactions. 8) Explain the mechanism of homogeneous catalysis. SECTION B (4 12 = 48) Answer All questions 9) a) Derive Gibb s Helmholtz equation. b) Explain free energy change accompanying a chemical reaction.

9 10) a) Describe Scintillation counters. b) Explain Radiometric analysis in medicine and Agriculture. 11) a) Explain anomalous behavior of strong electrolytes. b) Describe the electrical phenomena at interfaces including electro kinetic-zero potential. 12) a) Explain Michaelis-Menten kinetics. b) Discuss Jablonski diagram.