LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PHYSICS & MATHEMATICS
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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.
- Write any four characteristics of d-block elements.
- Write the IUPAC name of the following.
a)[ CoCl(NH3)5] Cl2 b)[ Pt(NH3)6] Cl4
- What is Friedel-Craft’s alkylation?
- Differentiate enantiomers and diastereomers.
- State Henry’s law.
- What is degree of freedom?
- Define quantum yield.
- Draw the structure of the following.
- Adenine b) Cytosine
- What is vulcanisation of rubber?
- How is Buna-s rubber prepared?
PART – B
Answer any eight questions. (8 x 5 = 40)
- a) Transition metal compounds are generally coloured. Why?
- b) Differentiate primary valency and secondary valency of coordination compounds.
12 Draw the structure of hemoglobin and explain its functions.
- Which of the following exhibit geometrical isomerism? Explain
- 2-butene b) 1,2-dichloro propane c) 2,3-butenedioic acid.
- Compare the stereochemistry of SN1 and SN2 reaction.
- Explain the optical isomerism of lactic acid.
- Draw the phase diagram of phenol-water system and explain.
- Derive the rate expression of first order reaction.
- State a) Grotthus-Draper law b) Stark-Einstein’s law.
- Write a note on replication of DNA.
- Draw the structure and give any two functions of the following.
- a) Oxytocin b) Adrenaline
- Define the following.
- a) polymer b) degree of polymerization c) Elastomers
- What are the causes of corrosion?
PART-C
Answer any four questions. (4 x 10 = 40)
- a) What is EAN principle? Apply it to the following compounds and explain their
stability.
- i) [Co(NH3)6]3+ ii) K3[Fe(CN)6 ] (6)
- b) Predict the geometry, hybridization and magnetic properties of [Co(CN)6]3- (4)
24 a) Give the mechanism of halogenation of benzene. (4)
- Define the following term:
- i) racemic mixture ii) resolution iii) optical isomerism (6)
- a) What are the conditions of ideal solutions. (4)
- b) Draw the phase diagram of simple eutectic system. Explain. (6)
- Derive the rate expression for the reaction 2A¾® products. Find the value of half life period. (6+4)
- Discuss the double stranded helical structure of DNA. (10)
- a) Write a note on “galvanisation”. (4)
- b) Explain the mechanism of step growth and chain growth polymerization with any one example. (6)