LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – PHYSICS & MATHEMATICS

LM 03

SECOND SEMESTER – APRIL 2006

                               CH 2100 – GENERAL CHEMISTRY FOR PHYSICS & MATHS

(Also equivalent to CH 3100)

 

 

Date & Time : 26-04-2006/1.00-4.00 P.M.   Dept. No.                                                       Max. : 100 Marks

 

 

                                 PART-A                                                             (10×2=20)

   Answer all questions.

 

1. Write any four characteristics of d-block elements.
2. Write the IUPAC name of the following.

a)[ CoCl(NH₃)₅] Cl₂          b)[ Pt(NH₃)_6] Cl₄

3. What is Friedel-Craft’s alkylation?
4. Differentiate enantiomers and diastereomers.
5. State Henry’s law.
6. What is degree of freedom?
7. Define quantum yield.
8. Draw the structure of the following.
9. Adenine b) Cytosine
10. What is vulcanisation of rubber?
11. How is Buna-s rubber prepared?

 

                                                    PART – B

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

 

11. a) Transition metal compounds are generally coloured. Why?
12. b) Differentiate primary valency and secondary valency of coordination compounds.

12     Draw the structure of hemoglobin and explain its functions.

13. Which of the following exhibit geometrical isomerism? Explain
14. 2-butene b) 1,2-dichloro propane c) 2,3-butenedioic acid.
15. Compare the stereochemistry of S_N1 and S_N2 reaction.
16. Explain the optical isomerism of lactic acid.
17. Draw the phase diagram of phenol-water system and explain.
18. Derive the rate expression of first order reaction.
19. State a) Grotthus-Draper law b) Stark-Einstein’s law.
20. Write a note on replication of DNA.
21. Draw the structure and give any two functions of the following.
22. a) Oxytocin   b) Adrenaline

 

 

21. Define the following.
22. a) polymer      b) degree of polymerization     c) Elastomers
23. What are the causes of corrosion?

 

PART-C

         Answer any four questions.                                                             (4 x 10 = 40)

23. a) What is EAN principle? Apply it to the following compounds and explain their

stability.

1. i) [Co(NH₃)₆]³⁺                       ii) K₃[Fe(CN)₆  ]                                   (6)
2. b) Predict the geometry, hybridization and magnetic properties of [Co(CN)₆]^3-                                                                                                                  (4)

24        a)  Give the mechanism of halogenation of benzene.                                     (4)

1. Define the following term:
2. i) racemic mixture ii) resolution iii) optical isomerism                               (6)
3. a) What are the conditions of ideal solutions.                         (4)
4. b) Draw the phase diagram of simple eutectic system. Explain.                    (6)
5. Derive the rate expression for the reaction 2A¾® products. Find the value of half life period.                                                             (6+4)
6. Discuss the double stranded helical structure of DNA. (10)
7. a) Write a note on “galvanisation”. (4)
8. b) Explain the mechanism of step growth and chain growth polymerization with any one example.                                                                         (6)

 

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