LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIO.& BIOTECH. & ADV. ZOO.& BIOTECH
SUPPLEMENTARY EXAMINATION – JUNE 2009
CH 3104 - CHEMISTRY FOR BIOLOGIST - I
Date & Time: 26/06/2009 / 10:00 - 1:00 Dept. No.
Max. : 100 Marks
Part A
Answer all the questions.
10 x 2 = 20
1.
Mention the type of hybridization and shape of ammonia.
2.
Draw the resonance structures of phenol.
3.
Name the following coordination compounds.
a) [Co(NH3)6]Cl3
b) Na3[Co(NO2)6]
4.
Define tyndall effect.
5.
Calculate the pH of 0.01N NaOH.
6.
What are enantiomers? Give an example.
7.
How is maleic and fumaric acid differentiated?
8.
Calculate the molarity of a solution which contains 6 g of NaCl (MW 58.44) in 200
ml of the solution.
9.
Arrange the following in the order of acidity and give reason.
a) chloro acetic acid b) acetic acid c) dichloro acetic acid d) trichloroacetic acid
10. Mention the differences between lyophilic and lyophobic colloids.
Part B
Answer any eight questions.
8 x 5 = 40
11. Draw and explain the crystal structure of CsCl.
12. Define optical activity. Explain the optical isomerism of lactic acid.
13. State the postulates of Werner’s theory.
14. Derive Henderson equation for acidic buffer.
15. Derive the rate expression for the reaction A products.
16.
What are the requirements of a primary standard?
17. Explain the structure of SF6 using hybridization.
18. Explain the electrophoresis with a diagram.
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19. What is peptisation? Explain with an example.
20. Mention the differences between homo- and heterogeneous catalysis with examples.
21. Discuss any two methods of separation of racemic mixture.
22. Briefly discuss the structure and functions of chlorophyll.
Part C
Answer any four questions.
4 x 10 = 40
23. Explain the hybridization of IF7 and PCl5 using VSEPR theory.
24. What is crude rubber? How is it vulcanized? Explain.
25. Discuss the geometrical and optical isomerism in octahedral complexes with
examples.
26.
a) What is inter- and intramolecular hydrogen bonding? Explain with examples.
b) Describe any two methods for determining the order of a reaction.
27. How are the following polymers manufactured?
a) Nylon
b) Terylene
c) neoprene
28. a) Explain electro osmosis with a diagram.
b) Differentiate order and molecularity with examples. (5+5)
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d) bakelite
(5+5)