LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

GH 55

FOURTH SEMESTER – APRIL 2008

CH 4501 – INORGANIC CHEMISTRY – II

 

 

 

Date : 29/04/2008                Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

            PART-A

Answer all the questions                                                           (10 ´ 2 = 20)

1. What are the basic chemical changes observed in roasting of an ore?
2. Give any two examples for reduction of an oxide ore.
3. Why do d-block elements exhibit variable oxidation states?
4. What happens to the mercuric salt when it acts as a reductant?
5. Write the IUPAC nomenclature of the following complexes.

(i)  K[Ag(CN)₂]  and   (ii)  [Pt(NH₃)₄NO₂Cl]CO₃

6. Define electroneutrality principle.
7. What is induced radioactivity? Give an example.
8. Write the role of moderators in nuclear reactor.
9. Give any two differences between amorphous and crystalline substances.
10. How are silicates classified?

PART-B

Answer any eight questions                                                    (8 ´ 5 = 40)

11. Write a note on Ellingham diagram.
12. What are the various processes used in the concentration of ores? How would you concentrate an ore using froath floatation process?
13. What are transition metals? Discuss their position in the periodic table.
14. How is uranium extracted from its ore?
15. Explain the following with an example.
16. Ionization isomerism
17. Ligand isomerism
18. Explain the postulates of valence bond theory of coordination complexes.
19. What are Magic numbers? What are their importance in the stability of nuclei?
20. Discuss the precipitation and conductivity methods for the study of complexes.
21. Describe the methods involved in the detection of radioactivity?
22. What is meant by nuclear fission? Write a note on chain reaction.
23. Explain the conductance and metallic luster of metals using metallic bond theory.
24. Derive Bragg’s law.

PART-C

Answer any four questions                                                   (4 ´ 10 = 40)

 

23. Explain the different techniques employed for refining of metals.
24. a) Discuss the lanthanide contraction and its consequences. (7)
25. b) Give the equations for the application of Cr(VI) and Mn(VII) as oxidants.                        (3)
26. a) State the postulates of Werner’s theory of coordination compounds. Illustrate with one

example                                                                                                                         (6)

1. b) Calculate EAN of the metals in the following complexes.

(i) K₄[Fe(CN)₆]                                 (ii) [Ni(CO)₄]                           (4)

26. a) What are the assumptions of Crystal field theory? (4)
27. b) Discuss the splitting of d- orbitals in the case of square planar complexes.              (6)
28. Discuss the application of nuclear energy in various fields.
29. a) How will you find the following for fcc and bcc crystals?                                      (6)

• Number of atoms in a unit cell
• Packing fraction
• Coordination number

1. b) Draw and explain (100), (111), (101) and (001) planes.                                           (4)

 

 

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