ii) Describe the various types of detectors used in IR spectroscopy.

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1 (DCHE 21) ASSIGNMENT - 1, DEC PAPER - V : ANALYTICAL 1) Describe a method for the determination of manganese in complex matrices. 2) Describe the instrumentation and working principles of IR. 3) What are factors affecting the fluorescence. Explain define the terms fluorescence and phosphorescence. 4) Explain the principle and analytical application of Flause photometry. 5) i) Discuss the sampling techniques used for getting IR spectrum of solids, ii) Describe the various types of detectors used in IR spectroscopy.

2 6) i) How can you determine iron present in a matrix by using spectro photometer. ii) Explain the procedure for the analysis of ammonia by using UV-visible spectrophotometer. 7) i) Describe the theory and instrumentation of AAS. Write few analytical applications of it. ii) Explain the interferences that occur in AAS and how it to overcome these 8) i) Describe the theory and instrumentation of spectrofluori -meter. Write its applications. ii) Classify the different types of burners that are employed in AAS and explain

3 (DCHE 21) ASSIGNMENT - 2, DEC PAPER - V : ANALYTICAL 1) Draw and explain the conductometric titration curve of a strong acid - strong base with an example. 2) Discuss various components of the instruments employed in electro gravimetric analysis. 3) Describe the principle and analytical applications of solvent extraction technique. 4) Describe the principle and application of gas chromatography. 5) i) What are the advantages of dropping mercury electrode in polarography? ii) Write a detailed account on ampero-metric titrations. 6) i) Discuss the importance of constant current Coulometry. ii) State and explain Ilkosic equation. 7) i) Discuss the action of various ion-exchange reris used for separation of ii) Briefly explain about TLC. 8) Explain the principle, instrumentation and application of HPLC.

4 (DCHE 22) ASSIGNMENT - 1, DEC PAPER- VI : INORGANIC 1) Describe a two methods of synthesis of transuranium elements. 2) Discuss the magnetic properties of Lanthanide and colour of actinide ions. 3) Explain the principle and application of Raman Spectroscopy. 4) Discuss the various crystals and explain their properties. 5) What is meant by actinide contraction? Explain its consequences. Mention the uses of Lanthanide and actinide compounds. 6) Describe a method for separation of Lanthanides. Discuss the oxidation states of actinides. 7) Describe the working principle of electronic absorption spectroscopy. Write few applications of this technique to inorganic systems.

5 8) Explain, how Raman spectroscopy employed in elucidation of structure of metal complexes with suitable example.

6 (DCHE 22) ASSIGNMENT - 2, DEC PAPER- VI : INORGANIC 1) Explain how magnetic methods are used to study the stereo chemistry of metal complexes. 2) Give an detail account on chemical shifts are spin-spin coupling 3) Describe the role of essential elements. Mention the uses of zinc enzyme. 4) Describe the mechanism of oxygen transformation. 5) Describe in detailed Goy s method. Explain it application to inorganic compounds for structure elucidation, with example. 6) Explain with neat block diagram of instrumental working principle and application of M S. 7) Discuss the important utility and its existence of oxygen carriers. Describe a method of synthesis of it. 8) What is meant by Hydrogen bonding? Explain how this property is used by NMR for elucidation of metal complexes.

7 (DCHE 23) ASSIGNMENT - 1, DEC PAPER- VII : ORGANIC 1) Calculate the λ max of the following. a) Et b) CoC 2 H 5 CH 3 CO OH c) O 2) Explain the vibrational frequencies of esters and lactones. 3) Explain the chemical shift and spin-spin interaction in NMR. 4) What are the factors affecting fragmentation n? Explain. 5) i) Write down the Fiesev-Woodward rules for calculating absorption maxima of carbonyl compounds.

8 ii) Explain the solvent effect on vibrational frequencies with suitable examples. 6) i) Discuss in detail the steric effect in biphenyls. ii) Describe the hydrozen bonding effect on fermi resonance. 7) i) What is nuclear overhauser effect? Explain its importance with suitable example. ii) Write the principle of FT-NMR. Explain its advantages. 8) i) How will you distinguish between 3-methyl and 4-methyl cyclo hexane on the basis of mass spectrometry? ii) Explain the mass spectral fragmentation of organic compounds.

9 (DCHE 23) ASSIGNMENT - 2, DEC PAPER- VII : ORGANIC 1) Describe in detail of actinometry. 2) What is Mc Lafferty rearrangement in mass spectrometry. 3) Describe the classification and role of essential elements. 4) Write a detailed note on metal DNA interactions. 5) Will the following systems show ESR spectra. Give reason. i) Cyclo propenyl system ii) Benzene denegation ion (C 6 H 6 ) 2. iii) 1,3,5 triphenyl benzene dianion. 6) Which of the following compounds undergo this rearrangement under electron impact and why i) 2-Isopropyl cyclo hexane ii) Ethyl isobutyrate iii) 2-Nitr toluene

10 7) i) Describe the mechanism of oxygen transformation. ii) Explain in detail on natural antibiotics as ionophores. 8) i) Write about Myoglobin and Haemoglobin. ii) Write a note on metal ion toxicity.

11 (DCHE 24) ASSIGNMENT - 1, DEC PAPER- VIII : ENVIRONMENTAL 1) Explain the effects of weathering on the environment. 2) What is meant by sampling? Write its importance in soil analysis 3) Explain the sources and emission of organic pollutants. 4) Give a detail account on the reaction of nitrogen oxides in the atmosphere. 5) i) Discuss the altitude, temperature and important chemical speces present in various regions of atmosphere. ii) Write down the principles involved in soil formation. 6) i) Discuss the various functions of soils and properties of ion-exchange in soils. ii) How do you determine the moisture and humus content in soil systems.

12 7) Write short notes on: i) Radio active substances ii) Oxides of nitrogen iii) Acid rain 8) How do you carry out the analysis of i) Aromatic hydro carbons ii) Hydrogen sulphide and iii) Ammonia in air samples

13 (DCHE 24) ASSIGNMENT - 2, DEC PAPER- VIII : ENVIRONMENTAL 1) Discuss the various stages of hydrological cycle. 2) Give a detail account on arsenic and oil pollution. 3) Discuss the principles of electro dialysis and ion-exchange methods. 4) Describe a method for determination of nitrogen compounds in water pollution. 5) Explain the water pollution due to solid waste, industrial and shipped operations. 6) Give a detail account on pesticides, lead, and nitrides and related pollution aspects. 7) Explain the methods for determining COD and BOD. Explain their significance. 8) Give a detailed account of various techniques adopted in water treatment.

(DCHE 21) M.Sc. (Final) DEGREE EXAMINATION, DECEMBER Second Year. Chemistry. Paper V ANALYTICAL CHEMISTRY. PART A (4 10 = 40 marks)

(DCHE 21) M.Sc. (Final) DEGREE EXAMINATION, DECEMBER 2010. Second Year Chemistry Paper V ANALYTICAL CHEMISTRY Time : Three hours Maximum : 100 marks PART A (4 10 = 40 marks) Answer any FOUR questions.