LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

WD 04

B.Sc. DEGREE EXAMINATION – MATHEMATICS & PHYSICS

SECOND SEMESTER – April 2009

CH 2102 / 2100 – GENERAL CHEMISTRY  FOR PHYSICS & MATHS

 

 

 

Date & Time: 25/04/2009 / 1:00 – 4:00  Dept. No.                                                 Max. : 100 Marks

 

 

                                                                      PART-A                  

 Answer ALL questions.                                                                   (10 x 2 = 20)

 

1. Write the IUPAC names of the following complexes.

(i) Na₂[Fe(CN )₆]      (ii)    [Co(en)₃]Cl ₃                                                                                                                                  2. The expected and actual configuration of Cr and Cu differs. Why?

3. Write the following acids in increasing order of their acidity. Justify your answer.

ClCH₂COOH, CH₃COOH, CCl₃COOH, Cl₂CHCOOH

4. Mention the type of isomerism exhibited by maleic and fumaric acids. Give their structures.
5. State Beer-Lambert’s Law.
6. Differentiate homogeneous and heterogeneous catalysis with suitable examples. 7. What are the types of RNA? Mention their functions.
7. What are the diseases associated with abnormal metabolism of thyroxine? What are its

symptoms?

9. What is meant by vulcanization?

10 How corrosion is prevented by electroplating?

 

PART-B

Answer any EIGHT questions.                                                        (8 x 5 = 40)

 

11. Explain the postulates of Werner’s theory of coordination complexes. 12. Explain the structure and functions of chlorophyll.
12. Write all possible isomers of (i) [RhCl₂(en)₂]⁺ (ii)  [CoCl₃(NH₃)₃]⁺
13. Discuss the various conformers of butane.
14. Explain the optical isomerism in tartaric acid. 16. Derive the expression for rate constant of first order reactions.                                                            17. Compare thermal and photochemical reactions.                                                                                      18.  Draw the structure and give any two functions of the following.
15. a) Oxytocin   b) Testosterone
16. What are the various achievements of genetic engineering and give any two possible

dangers of it.                                                                                                                                     20. Explain the electrochemical mechanism of corrosion.                                                                                                    21. State Raoult’s law. Discuss the positive deviations of real solutions from their ideal  behaviour.   22. Differentiate the following with suitable examples.

(a) Step growth and chain growth polymerization

(b) Thermoplastics and thermosetting plastics

 

PART-C

Answer any FOUR questions                                                          (4 x10 = 40)  

23. i) Discuss the postulates of VB theory.   (4+6)
24. ii) Predict the geometry, structure and magnetic property of [CoF₆]^3-
25. i) Compare S_N1 and S_N2 reactions (5+5)
26. ii) Give the mechanism of nitration of benzene.
27. Discuss the application of phase rule to water system.
28. i) What is the effect of temperature on the rate of a reaction? (4+6)
29. ii) Discuss the variation of mutual solubility of phenol and water with temperature.
30. Discuss the double helical structure of DNA. (5 + 5).
31. How do the following polymers prepared? Give any two uses of them.

(a) Buna-S     (b) Bakelite     (c) PET                 (3+4+3)

 

 

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