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Posted Date: 13 Jun 2009 Posted By: L.Rajasekar Member Level: Bronze
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2007 Bharathiar University B.Sc PAPER VIII - CHEMISTRY Question paper
Time :Three hours Maximum : 75 Marks
Answer ALL questions in each section
SECTION A—(10 X 1=10) marks
Choose the correct answer
1.Identify the achiral molecule
a)D-glyceroldehyde
b) L-glyceroldehyde
c) Fumaric acid
d)Lactic acid
2. Op[tical inactivity of meso-tartaric acid due to the presence of
a) Achiral centre
b) Plane of symmetry
c) chiral centre
d) Nonsuperimposibleility
3. Isicyanide is not the intermediate for ------ rearrangement
a) Hofmann
b) Curitus
c) Benzidine
d) Lossen
4. An oxime become amide in which rearrangement
a) Claisen
b) Cope
c) Curtius
d) Beckmann
5. Glucose, Manose pair is termed as
a) Epimers
b) Anomers
c)Enantiomers
d)mesomers
6. The monomeric aldose is
a) Fructose
b)Sucrose
c)Maltose
d) Arabinose
7. Among the a-amino acids the optically inactive one is
a) Glycine
b) Alanine
c) Serine
d) Valine
8. Protein on complete hydrolysis yields
a) CO2 + H2O
b) a-Amino acids
c) ß-Amino acids
d) Glucose
9. Identify the non-aromatic compound among the following
a) Furan
b) Pyrrole
c) Pipperidine
d) Thophene
10. Skraup synthesis is connected with
a) Iso-Quinoline
b) Indole
C) Isatin
d) Quinoline
SECTION-B – (5 × 5 = 25)
11 (a). Assign R and S configuration of the following compounds
(i) COOH
D NH2
Cl
CHO
(ii) Br OH
Cl
(or)
(b) Define the following terms:
(i) Enantiomers.
(ii) Diastereomer
(iii) Chirality
12. (a) Predict the Product and Suggest mechanism
R2CO + NH3 H2SO4
(or)
(b) Explain the mechanism of Claisen Rearrangement
13 (a) With the example define the following terms.
(i) Anomers
(ii) Epimers
(or)
(b) Draw the structure of Maltose and sucrose
14 (a) Give the product obtained when alanine is treated with
(i) Ba(OH)2
(ii) HNO2
(iii)HCL
(or)
(b)Explain the classification of proteins based on their functions
15. (a) Pyridine shows aromatic character- Explain this fact with molecular orbital picture
(or)
(b) Give the synthesis of Isoquinoline
SECTION C – (5 × 8 = 40)
16.(a) Define the term Racemization and resolution and give one method for each
process.
(or)
(b) (i) With illustration explain Asymmetric Synthesis
(ii) Discuss the optical activity exhibited by Allenes
17. (a) Give a comparative account of
(i) Hofmann
(ii) Curtius and
(iii) Lossen Rearrangements.
(or)
(b) (i) Predict the product and suggest mechanism
Me2 C(OH)-C(OH)HPh
(ii)Explain the mechanismof Benzilic and rearrangement
18. (a) Deduce the structure of Glucose
(or)
(b) Write a note on:
(i) Muta rotation
(ii) Kiliani- Fischer synthesis
19 (a) Discuss the Secondary Structure of Protein
(or)
(b) Explain:
(i)Gabrial synthesis
(ii) Strecker amino acid synthesis
20 (a) Complete the following reactions
(i) Pyrrole +PhN2+Cl-
(ii) Furan + Maleic anhydride
(iii) Thiphene + HCHO + HCl
(iv) Pyridine + NaNH2
(or)
(b) How will you Synthesis the following Compounds
(i) Quinoline
(ii) Indole
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