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Posted By: Manav Member Level: Gold Posted Date: 10 Jan 2008
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2007 Guru Nanak Dev University B.Sc ORGANIC CHEMISTRY OF FUNCTIONAL GROUPS-III (Chem-302) 3rd Sem (DEC, 2k7) Question paper
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5412
B.Sc. (H.S) in Chemistry 3rd Semester
2117
PAPER - Chem-302
Organic Chemistry of Functional Groups-III
Time Allowed : 3 hours
Maximum marks : 75
Note : Attempt TEN questions in A, EIGHT questions in B and TWO in Section-C
SECTION - A
10 x 1½ = 15
1.
(i) How will you distinguish between glucose and sucrose ?
(ii) How a-amino acids are prepared ? Give two examples.
(iii) How can you explain the fact that triethyl amine boils at lower temperature than dimethyl amine ?
(iv) What is azo dye ?
(v) How will you differentiate between terminal and internal alkynes by IR ?
(vi) What is bathochromic shift ?
(vii) What do you understand by Zwitter ion ?
(viii) Glucose decolourises colour of bromine water while fructose does not. Explain ?
(ix) What is strecker synthesis ?
(x) How diazopropane can be converted to n-propyl bromide ?
(xi) How will you define the term diastereoisomer ? Give an example.
(x) refer to attachment
SECTION - B
(8 x 4½ = 36)
2. How will you synthesize alanine from ethyl chloride ?
3. Write down all the structures of tripeptide made up of glycine and alanine.
4. How will you synthesize 1,4-diaminobutane from ethylene ?
5. Discuss the cyclic structure of D-glucose.
6. (i) Explain why amines are more basic than amides.
(ii) Explain the term epimer and anomer.
7. Starting from glucose how will you prepare :-
(a) sorbitol
(b) n-Hexane
8. How will you differentiate between 1º, 2º and 3º amine by IR ?
9. What is a dye ? How are they classified on the basis of application ?
10. refer to attachment.
11. Why the optical rotation of aq. solution of D-glucose changes with time and finally becomes constant ?
SECTION - C
12. Write short notes on :-
(a) Hoffman's degradation
(b) Gabriel Phthamide synthesis
(c) Ruff degradation (4 x 3)
13. refer to attachment
14. refer to attachment
15. refer to attachment
Attachments:
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