LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.Sc. DEGREE EXAMINATION – PLANT BIOLOGY & ADV. ZOOLOGY
FIRST SEMESTER – NOVEMBER 2012
CH 1100 – CHEMISTRY FOR BIOLOGISTS – I
Date : 03/11/2012 Dept. No. Max. : 100 Marks
Time : 1:00 – 4:00
Part – A
Answer all the questions: (10 × 2 = 20)
- Define relative error.
- Why TLC is superior to paper and column chromatography?
- What are adsorbents? Give an example.
- What is intermolecular hydrogen bonding? Give an example.
- What is dipole – dipole interaction?
- What are hormones?
- Define normality?
- What is enzyme catalyst?
- Give the source and deficiency of vitamin A.
- Draw the structure of vitamin E.
Part – B
Answer any eight questions: (8 × 5 = 40)
- Mention five points of handling of acids.
- Explain the factors affecting Rf
- Discuss the crystal structure of CsCl.
- What are the factors involving the formation of ionic bond?
- Discuss the hybridization and geometry of CH4 and H2
- List the postulates of Werner’s theory.
- Discuss the geometrical isomerism of octahedral complexes.
- Give the difference between molecularly and order.
- Discuss the occurrence and composition of fats.
- What is the biological effects and thyroid hormones?
- Explain the mechanism of acid buffer.
- What are secondary standard solutions and how are they standardised?
Part – C
Answer any four questions: (4 × 10 = 40)
- What are the prerequisites for choosing adsorbents?
- Describe the three types of adsorbents with suitable example.
- a) Discuss the optical isomerism of octahedral complexes.(7)
- b) What are polydentate ligands? Give an example. (3)
- a) What is rate law? Derive the rate expressions for I order reactions.(5)
- b) What are the prerequisites for the preparation of primary standard solutions?(5)
- What is catalyst? Explain homogeneous and heterogeneous catalyst with suitable example.
- Explain in detail the structure and function of vitamin A, C, D, K and E.
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