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III Semester B.Tech. Degree Examination, June 2009 PHYSICAL AND INORGANIC CHEMISTRY (H) Time : 3 Hours
Max. Marks : 100 PART – A
Answer all questions, each question carries 4 marks. 1. Write note on the chemical characteristics of noble gases. 2. What are the important ores of chromium ? What are its uses ? 3. What is lanthanide contraction ? Explain. 4. Explain the important postulates of Werner’s coordination theory with example. 5. With the help of a graph, explain the variation of conductance of different electrolytes with dilution. 6. What is Ostwald’s dilution law ? Derive an expression for this law. 7. What is a super conductor ? Explain type-I and type-II, superconductors with example. 8. Write note on : i) principle of ESR spectrum. ii) ESR spectrum of methyl radical. 9. What are isotonic solutions ? A solution containing 8.6 gm/L of urea was found isotonic with a 5% solution of an organic nonvolatile solute. Calculate the molar mass of latter. (molar mass of urea = 60 gm mol–1 ) 10. Explain the Swarm theory of liquid crystals. ? P.T.O .
3124 PART – B
Answer any two questions from each Module. Each question carries 10 marks. Module – I 11. Describe the extraction, important properties and uses of Titanium. 12. Discuss the splitting of d-orbitals with examples in i) Octahedral complexes. ii) Tetrahedral complexes. 13. Describe the discovery, isolation and separation of rare gases. Module – II 14. Explain briefly the Raman spectrum and its applications. 15. Derive Henderson equation. Discuss its applications. 16. i) What is Kohlrauche’s law ? Explain two of its application. ii) Write briefly conductometric titrations. Module – III 17. What is distribution law ? What happens to this law when association and dissociation of solute takes place ? Explain. 18. What are the important postulates of kinetic theory of gases ? Derive the equation 2 K.E = 1 3 nmu .
19. Prove that depression in freezing point is a colligative property and derive an expression for the determination of unknown molecular weight of a solute. ______________