BS-VIS/5
26547
26547
CHEMISTRY
Course No. : 601
(Organic Chemistry)
Time Allowed-3 Hours Maximum Marks-80
Section – A (Very Short Answer Type Questions)
Note: Attempt all ten questions. Each Question carries 2 marks.
1. What are chromophores? Give one example.
2. Define chemical shift.
3. Give one method of synthesis of Grignard reagent.
4. What is Zeigler - Natta catalyst?
5. Write down the product of the following reaction:
6. What is hydroboration?
7. Write down the molecular orbital diagram of Thiophene.
8. Write down the structure of Indigo.
9. Define electrophoresis.
10. What are glycosides? Give one example.
Section – B (Short Answer Type Questions)
Note: Attempt five questions one from each unit. Each question is of 6 marks.
UNIT-I
11. How will you distinguish between aldehydes and ketones using IR spectroscopy?
12. Define coupling constant. Discuss its significance in distinguishing between cis- and trans- stilbene.
UNIT-II
13. Write down the product along with mechanism of the following reaction:
14. Give two methods of synthesis of ethyl acetoacetate.
UNIT-III
15. What are phase transfer catalysts? Give one example of a reaction catalyzed by these catalysts.
16. Discuss the conformational analysis of mono-substituted cyclohexanes.
UNIT-IV
17. Among pyridine and pyrrole, which one is more basic and why?
18. Give one method of the synthesis of methyl orange.
UNIT-V
19. How will you carry out the selective hydrolysis of peptides?
20. What is mutarotation? Discuss its mechanism.
Section – C (Long Answer Type Questions)
Note: Attempt three questions. Each question is of 10 marks.
21. Calculate λmax (Ï€ – Ï€*) of the following compounds using Woodward - Fieser rules:
22. Write down the product along with mechanisms of the following reaction:
23. Write short notes on the stereochemistry of E2 anti-eliminations.
24. Write down the product and give the mechanism of the following reaction:
25. How will you prepare glucosazone? Give mechanism of its formation.