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

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1 (DCHE 01) M.Sc. (Previous) DEGREE EXAMINATION, MAY (First Year) CHEMISTRY Paper - I : General Chemistry Time : 03 Hours Maximum Marks : 80 PART - A (4 8 = 32) 1) Discuss the micro wave spectra of linear molecules. 2) Discuss the various sources of difficult radiation in molecular spectroscopy. 3) Explain the rotational fine structure of electronic vibrational transition in visible spectroscopy. 4) Discuss the diatomic rotator in IR spectroscopy with suitable example. 5) Explain importance of Regression analysis in analytical data interpretation. 6) What is an error? How do you minimise the error in analytical analysis. 7) Explain the basic components of computer with block diagram. 8) Explain with lucid answer. a) Flow charts and b) Control statement in fortran. PART - B (4 12 = 48) Answer All questions 9) a) i) Discuss the microwave spectra of rigid rotor. ii) Explain the basic principle of ESR spectroscopy.

2 b) i) Explain the quantized energy levels in rigid rotor of microwave spectroscopy. ii) Explain the vibrational spectra of diatomic role in IR spectroscopy with example. 10) a) i) Discuss the vibrational spectra of an harmonic in IR spectroscopy. ii) Explain the basic principle of NMR spectroscopy. b) i) Write the analytical application of IR spectroscopy. ii) Explain the quantitation of vibrational motion in IR spectroscopy. 11) a) i) Explain the sampling techniques used in the collection of solid samples for analysis. ii) Explain the I) Storage sample II) Confidence intervals. b) i) Explain the significant figures and computation rules in analytical data ii) Discuss the importance and significance of central value and dispersion. 12) a) Write a flow chart and Fortran programme to Beers law by least square method. b) Write a flow chart and Fortran programme to hydrogen ion concentrate of standard.

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 8 = 32) 1) Explain the pulso electric effect and debroglie hypothesis. 2) Discuss the variation method and its application to determination of ground state energy of hydrogen atom. 3) Explain the bond orders and shortest bond length in CN, CN and CN +. 4) Explain the differences between dipole-dipole and dipole - induced dipoles. 5) Describe the John-Teller s effect on genetics of Oh complexes. 6) Discuss the CFSE and electrochemical series. 7) Explain the basic ideas of inner and outersphere mechanisms with example. 8) Explain the structural properties of intercalation compounds. PART - B (4 12 = 48) Answer All questions 9) a) Deduce the schrodinger wave equation for an electron in a box. b) Write a note on : i) Wave function and its physical interpretator. ii) Spin and orbit angular momentum. 10) a) State and explain the important postulates of MOT. Draw and explain M.O. energy diagram of O 2

4 b) Explain the various types of crystals with suitable examples. 11) a) Describe the optical method for the determination of stability of metal complexes with relevant examples. b) What is meant by CFSE? Write differences between the crystal field splitting of d orbitals in Octahedral and tetra hedral complexes. 12) a) Discuss the ligand of substitution of SN 1 and SN 2 in octahedral complexes with relevant examples. b) Write the preparation, properties and structures of carboranes.

5 (DCHE 03) M.Sc. (Previous) DEGREE EXAMINATION, MAY (First Year) CHEMISTRY Paper - III : Organic Chemistry Time : 03 Hours Maximum Marks : 80 PART - A (4 8 = 32) 1) a) Discuss the resonance and hyper conjugation with example. b) Explain the asymmetric synthesis with example. 2) Discuss the aromaticity in benzenoid and non-benzenoid compounds. 3) a) What is meant by regio selectivity? Explain its importance. b) Give the potential energy diagram of transition status and intermediate. 4) State and explain the Gattermann-Kock reaction. 5) Give any two methods for the generation of carbenes and explain the characteristics of free radicals. 6) a) Explain the oxidation pattern of aldehydes to carboxylic acid. b) Discuss the stereo chemical aspects of addition reaction. 7) Explain the mechanism and orientation in pyrolytic elimination reaction. 8) Discuss the mechanism of : a) Perkins reaction. b) Witting reaction.

6 PART - B (4 12 = 48) UNIT - I 9) a) i) Explain the Huckel rule to annuleues. ii) Explain the elements of symmetry with suitable examples. b) i) Discuss the differences between stereo specific and stereo selective synthesis with examples. ii) Explain the effect of conformation on reactivity in cyclohexane derivatives. UNIT - II 10) a) i) Give any three methods for the generation of carbanion. ii) Explain the structure, stability and reactivity of nitrenes. b) i) Explain kinetic and thermodynamic control reactions with examples. ii) Explain differences between classical and non classical phenomium ions. UNIT - III 11) a) i) Discuss the orientation and reactivity energy profile diagram of aromatic electrophilic substitution. ii) Explain the characteristics of free radicals. b) Give an account of the following reactions. i) Sand mayer reaction. ii) Hensdicker reaction. iii) Mechanism of hydro boration. UNIT - IV 12) a) Explain the following : i) Addition of Grignard reagents. ii) Amenolysis of ester. iii) EICB mechanism.

7 b) Discuss the mechanism of metal hydride reduction of saturated and unsaturated acids and ester with suitable examples.

8 (DCHE 04) M.Sc. (Previous) DEGREE EXAMINATION, MAY (First Year) CHEMISTRY Paper - IV : Physical Chemistry Time : 3 Hours Maximum Marks : 80 Part - A (4 x 8 = 32) 1) Explain the changes in isolated systems in reversible and irreversible process. 2) State and explain the Gibbs-Duhem equation. 3) Explain radio carbon dating and isotope dillution analyser. 4) Discuss the crystal defects. 5) What is meant by cell EMF? How it is determined? 6) Discuss the anamolous behaviour of strong electrolyte. 7) Write a notes on photosensitization. 8) Discuss the mechanism of acid-base catalysis. Part - B (4 x 12 = 48) Answer All questions 9) a) Derive Thermo dynamic phase rule and Raoults law. b) Explain about: i) Free energy change in ideal gas. ii) Variation of chemical potential with temperature and pressure

9 10) a) Describe Bragg s equation. Explain the Bravais lattices and Miller indices. b) Discuss the various counting devices used in radio activity. 11) a) Derive an equation for EMF of a cell with transference. b) Describe a method for the determination of standard electrode potential. Add a notes on Transport number. 12) a) Discuss the various types of catalysis with relevant examples. b) Write and explain photo chemical reactions and mechanism of Hydrogen and Chlorine.