LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – ADV.ZOO.&PLANT.BIO.&BIOTEC.

LM 07

THIRD SEMESTER – APRIL 2007

CH 3102 – CHEMISTRY FOR BIOLOGISTS – THEORY

 

 

 

Date & Time: 02/05/2007 / 9:00 – 12:00       Dept. No.                                                       Max. : 100 Marks

 

 

 

Part A

Answer all the questions.                                                                                      10×2=20

1. Define ionization energy.
2. Draw the resonance structures of phenol.
3. What is the oxidation state of the central metal ion in the following coordination compounds a) [Co(NH₃)₆]Cl₃     b)K₃[Fe(CN)₆]
4. What is Brownian movement?
5. Calculate the pH of 0.001N NaOH.
6. What are enantiomers? Give an example.
7. Mention the differences between order and molecularity.
8. Why is chloroacetic acid stronger than acetic acid?
9. Why do ionic compounds usually have higher melting point than the covalent compounds?
10. Define chiral carbon.

Part B

Answer any eight questions.                                                                                  8×5=40

11. Derive Henderson equation for basic buffer.
12. What are the factors affecting the rate of the reaction?
13. Derive the rate expression for the reaction A®
14. What are the requirements of a primary standard?
15. Explain the structure of SF₆ using hybridization.
16. Explain Electrophoresis with a diagram.
17. Draw and explain the crystal structure of NaCl.
18. Explain the process of vulcanization of rubber in detail.
19. Give reasons for the increase in acidity of the following:
20. Propionic acid < acetic acid < formic acid
21. a-Chloropropionic acid > b- chloropropionic acid

 

 

20. Explain any two methods of separation of racemic mixture.
21. Explain the optical isomerism of lactic acid.
22. Mention the differences between homo- and heterogeneous catalysis with examples.

Part C

Answer any four questions.                                                                                 4X10=40

 

23. Explain the geometrical and optical isomerism in octahedral complexes with one example for each.
24. Explain the hybridization of IF₇ and XeF₆ using VSEPR theory.
25. a) Describe any two methods for determining the order of a reaction.
26. b) What is inter- and intramolecular hydrogen bonding? Explain with examples.
27. Mention the differences between
28. a) Coagulation and peptisation
29. b) Lyophilic and lyophobic colloids
30. a) Explain electro osmosis with a diagram.
31. b) Draw and explain the crystal structure of CsCl.
32. How are the following polymers manufactured?
33. a) Nylon b) Terylene c) bakelite                    d) PVC

 

 

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