Bharathiar University 2007 B.Sc Chemistry VIII - - exam paper
Sunday, 24 March 2013 03:50Web
Time :Three hours Maximum : 75 Marks
ans ALL ques. in every part
part A—(10 X 1=10) marks
select the accurate ans
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 1 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 subsequent
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 × five = 25)
11 (a). Assign R and S configuration of the subsequent compounds
(i) COOH
D NH2
Cl
CHO
(ii) Br OH
Cl
(or)
(b) describe the subsequent terms:
(i) Enantiomers.
(ii) Diastereomer
(iii) Chirality
12. (a) Predict the Product and Suggest mechanism
R2CO + NH3 H2SO4
(or)
(b) discuss the mechanism of Claisen Rearrangement
13 (a) With the example describe the subsequent terms.
(i) Anomers
(ii) Epimers
(or)
(b) Draw the structure of Maltose and sucrose
14 (a) provide the product found 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 indicates aromatic character- discuss this fact with molecular orbital picture
(or)
(b) provide the synthesis of Isoquinoline
part C – (5 × eight = 40)
16.(a) describe the term Racemization and resolution and provide 1 method for every
process.
(or)
(b) (i) With illustration discuss Asymmetric Synthesis
(ii) explain the optical activity exhibited by Allenes
17. (a) provide 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) explain the Secondary Structure of Protein
(or)
(b) Explain:
(i)Gabrial synthesis
(ii) Strecker amino acid synthesis
20 (a) Complete the subsequent reactions
(i) Pyrrole +PhN2+Cl-
(ii) Furan + Maleic anhydride
(iii) Thiphene + HCHO + HCl
(iv) Pyridine + NaNH2
(or)
(b) How will you Synthesis the subsequent Compounds
(i) Quinoline
(ii) Indole
Earning: Approval pending. |