ASSIGNMENT - 1, DEC M.Sc. (FINAL) SECOND YEAR DEGREE CHEMISTRY. Maximum : 20 MARKS Answer ALL questions.
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1 (DCHE 21) ASSIGNMENT - 1, DEC PAPER- V : ANALYTICAL 1. How can you determine PK values of an acid base indicator? Explain with an example. 2. Explain the principle of Nephelometry. Write few applications of Nephelometry technique. 3. Define fluorescence. Explain the factors affecting the fluorscence. 4. Describe the technique of flame photometry. Write its applications and limitations in analytical chemistry. 5. Write the simultaneous determination of any two cations by using spectrophotometer. Explain in detail. 6. Describe the theory, instrumentation, principle and applications of Infrared Spectroscopy(IR). 7. Describe the theory, instrumentation, principle and applications of atomic absorption spectrophotometry (AAS). Write its advantages over flame photometry. 8. Write the principle, instrumentation and applications of fluorimetry. What are its advantages and limitations?
2 (DCHE 21) ASSIGNMENT - 2, DEC PAPER- V : ANALYTICAL 1. Write the principle and applications of conductometric titrations. 2. Describe various types of electrodes used in potentiometric titrations. 3. Write the principle and action of ion exchangers. Write few applications of ion-exchangers. 4. Write the principle, development methods and applications of Thin Layer Chromatography (TLC). 5. Explain the terms over voltage and decomposition potential.write the principle and applications of amperometric titrations. 6. Describe the theory, instrumentation principle and applications of coulometry. 7. Write the principle and applications of solvent extraction technique. What factors will affect solvent extraction? What do you understand by chelate and ion associated systems? 8. Describe the theory, instrumentation, working principle of high performance liquid chromatography (HPLC). Write the advantages of HPLC over GLC.
3 (DCHE 22) ASSIGNMENT - 1, DEC PAPER- VI : INORGANIC 1. Write the uses of lanthanides and actinide compounds. 2. Discuss the comparative study on the properties of lanthanides and actinides. 3. Discuss the applications of Raman spectroscopy in structural elucidation of inorganic compounds. 4. How can you interpret the X-ray diffraction data? Explain with an example. 5. Describe the extraction and separation of lanthanides. 6. Discuss the colour spectra and magnetic properties of lanthanides. 7. Describe the light sources, detectors used in IR spectroscopy. Write its working principle and applications to inorganic samples. 8. Explain the principle and application of X-ray diffraction technique in detail.
4 (DCHE 22) ASSIGNMENT - 2, DEC PAPER- VI : INORGANIC 1. Define magnetic moment of a substance. How can you determine magnetic susceptibility by gray balance method? 2. How can you explain NMR peaks-illustrate with two examples? 3. Describe the formation of fragmentations in mass spectroscopy with an example. 4. Discuss the mechanism of enzymes and co-enzymes. 5. How can you determine the magnetic susceptibility by Faraday method? Write the applications of magnetic methods for the study of stereochemistry of compounds. 6. Describe the instrumentation, working principle and applications of NMR spectroscopy. 7. Describe the instrumentation, principle and applications of mass spectroscopy. 8. Write a detailed note on synthetic oxygen carriers.
5 (DCHE 23) ASSIGNMENT - 1, DEC PAPER- VII : ORGANIC 1. Calculate the λ max of the following : (a) (b) (c) 2. Discuss the effect of Hydrogen bounding on vibrational frequencies with examples. 3. (a) Explain the Anisotropic effects on Aceteline and Benzene compounds. (b) Define chemical shift with examples. 4. Explain the Mass spectral fragmentation of any three different types of organic molecules.
6 5. (i) Write down the Woodward Fieser rules for calculating absorption maxima of α, β unsatuvated carbonyl compounds. (ii) Explain steric effect in biphenyls. 6. (i) Discuss in detail the various types of stretching and bending vibrations in IR spectrum of carbonyl compounds, carboxylic acids and lactones. (ii) Describe the solvent effect on vibrational frequencies with exmaples. 7. Write notes on the following : (i) Nuclear Over hausev Effect (NOE). (ii) Effect of Hydrogen bonding on chemical shifts. (iii) Karplus Curve with suitable example. 8. (i) Describe the Mc Lafferty rearrangement of different organic molecules. (ii) Define Metastable peak, Nitrogen rule.
7 (DCHE 23) ASSIGNMENT - 2, DEC PAPER- VII : ORGANIC 1. (a) Define Quantum yield, and actinometry. (b) Predict the products and mechanim of 2. (a) Justify disrotatory mode always mirror axies of symmetry where as con rotatory mode always C 2 axies of symetry with an example each. (b) Define superficial shift and autovafacial shift with an example each. 3. Explain the structure elucidation and synthesis of menthol. 4. Give the brief account on : (a) Hofmann rearrangement. (b) Benzil-Benzilic acid rearrangement. 5. (i) Discuss the photo chemistry of Aromatic compounds, and their derivatives.
8 (ii) Write the mechanism of the following reaction Norrish type I Norrish types II Photo Fries rearrangement. 6. Prove that all the (4m+2)π electron system of electro cyclic reactions are thermally dis rotation and photochemically conrotation, by using correlation diagram and FMO methods. 7. Write the structure elucidation and synthesis of Quinine. 8. Explain the mechanism of the following rearrangement reaction (i) Balyer Villager. (ii) Neber. (iii) Beckmann.
9 (DCHE 24) ASSIGNMENT - 1, DEC PAPER- VIII : ENVIRONMENTAL 1. What are soil colloids? Write the ion exchange properties of soils. 2. How do you analyse total nitrogen content in soil? 3. Explain the effects organic pollutants and particulate matter on the atmosphere. 4. How can you analyse ozone in Air samples? 5. Explain the methods of soil sampling. How can you determine silicon and nitrogen in soil samples? 6. Discuss the principles of weathering. Write the effects of temperature, water and air on weathering. 7. Describe the sources and emission of carbon monoxide and the oxides of nitrogen. Write the analytical procedure for the determination of carbon monoxide. 8. What are the causes for acid rains? Explain their effects. Explain the effects of air pollution with respect to radio active pollutants.
10 (DCHE 24) ASSIGNMENT - 2, DEC PAPER- VIII : ENVIRONMENTAL 1. Explain the sources and effects of Thermal pollution. 2. Discuss the effects of hydrocarbons with regard to water pollution. 3. Explain the methods of monitoring of sulphurdioxide in case of water pollutions. 4. Explain the water treatment by reverse osmosis method. 5. Discuss the effects of detergents and pesticides with regard to water pollution. 6. Explain the causes for domestic water pollution and write the effects of water pollution to agricultural and shipping industries. 7. How can you determine BOD, COD and phosphates in water samples? 8. Describe the primary and secondary methods of treatment of water.
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