LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – CHEMISTRY

AD 03

FIRST SEMESTER – NOV 2006

CH 1503 – CONCEPTS IN INORGANIC CHEMISTRY

 

 

Date & Time : 03-11-2006/1.00-4.00     Dept. No.                                                       Max. : 100 Marks

 

 

 

PART – A

Answer all the questions                                  (10 x 2 = 20)

1. Write the Schrodinger wave equation and discuss the significance of wave function.
2. What is inert pair effect? Explain with an example.
3. Give the electronic configuration of manganese and its variable oxidation states.
4. Which of the following element has higher ionization energy? Give reasons:
   (a) oxygen (b)
5. What is galvanization? What is the role of standard electrode potential in this process?
6. Arrange the following acids in the increasing acid strength with suitable explanation,
   HOCl,          HClO₃,        HClO₂,       HClO₄.
7. What are the differences between roasting and calcination?
8. Write the Lewis dot formula for ammonia molecule and give the number of bonded and lone   pairs of electron.
9. Mention the hybridization and geometry of PCl₅
10. Why the density of ice is lesser than that of water?

 

PART – B

 

Answer any eight questions                                 (8 x 5 = 40)

11. Explain a) Heisenberg uncertainity principle b) Hund’s rule of maximum multiplicity.
12. Write short notes on a) froth floatation process b) Van-Arkel process in metallurgy.
13. Explain the diagonal relationship in the periodic table with an example.
14. What is lattice energy? How is it determined for the formation of CaF₂ using Born Haber’s
15. Calculate the electronegativity of carbon (r_C = 0.71 A^o) using Allred –Rochow method.
16. Explain the types of hydrogen bonding and explain any two of its consequences.
17. Discuss the structure of (a) SF₆ (b) COCl₂ using hybridization theory.
18. What is levelling effect? How does HNO₃ behave as a base in concentrated sulphuric acid?    Give the chemical equation.
19. What are clathrates? What are their characteristics?
20. What are conjugate acid base pairs? Give an example.
21. What is symbiosis? Give examples.
22. What are the different types of forces in non-polar molecules?

 

 

PART – C

 

Answer any four questions                                                 (4 x 10 = 40)

23. Describe the role of Ellingham diagram for the reduction of metal oxides

to metals in metallurgy.

24. Explain the structure of the following compounds using VSEPRtheory

(i) SF₄                      (ii) H₂O               (iii) ClF₃              (iv) ICl₄^–

25. Construct a qualitative MO energy level diagram for O₂ Write the MO electronic    configuration and bond order for O₂, O₂⁺, O₂²⁺ O^2-, O₂^2-molecule
26. Discuss fajan’s rule with suitable examples.
27. How does band theory of metals explain the conducting properties of metals and n-type and p-   type semicondctors?
28. Explain HSAB theory. Mention any four applications.

 

 

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