LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – CHEMISTRY
SECOND SEMESTER – APRIL 2012
CH 207 / 209 – GENERAL CHEMISTRY II
Date : 16-04-2012 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
Part A
Answer ALL questions: (10 x 2 = 20 Marks)
- What are semiconductors?
- How are ortho and para-nitrophenols separated?
- What is the product obtained by the nitration of naphthalene?
- Define chromophores.
- Draw the structure of aspirin.
- State I law of thermodynamics.
- What is the catalyst used in Haber’s process?
- State Beer Lambert’s law.
- Define entropy.
- How is PVC prepared?
Part B
Answer any EIGHTquestions: (8 x 5 = 40 Marks)
- Differentiate inter and intramolecular hydrogen bonding with examples.
- Explain lanthanide contraction.
- Discuss the mechanism of nitration of furan.
- How is congo red prepared?
- Discuss the vulcanization of rubber.
- State Kohlrausch’s law. Give an example.
- Mention any two applications and any two risks of genetic engineering.
- Derive rate constant for a first order reaction.
- How is nickel estimated by photocolorimetry?
- Explain any two methods of prevention of corrosion.
- Differentiate homo and heterogeneous catalysis with examples.
- Explain the replication of DNA with a neat diagram.
Part C
Answer any FOUR questions: (4 x 10 = 40 Marks)
- Explain the optical isomerism in square planar and octahedral complexes.
- What are buffer solutions? Derive an expression for Henderson equation for an acidic buffer.
- Explain electrophoresis with a suitable diagram.
- Define steric acceleration and steric hindrance. Explain with an example for each.
- How are the following prepared?
(i) nylon (ii) terylene (iii) neoprene (iv) PVC
- Explain in detail the optical isomerism of tartaric acid.