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Name of the University : Vardhman Mahaveer Open University
Degree : M.Sc
Department : Chemistry
Subject Code/Name : MSCCH-06 – Reaction Mechanisms, Paricyclic Reactions, Organic Photochemistry, Stereochemistry
Year : II
Document Type : Question Bank
Website : vmou.ac.in
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/vmou.ac.in/3705.-MSCCH-06_136.pdf

VMOU Reaction Mechanisms Question Paper

Very short questions :

Section – A

1. Stability order of following carbonium ions Benzylic, Allylic tertary, secondary-

Related : VMOU MSCCH08 Natural Products, Heterocycles, Biogenesis and Spectroscopy M.Sc Question Bank : www.pdfquestion.in/3703.html

2. Why cyclopropyl carbonyl carbonium ion is stabilized-
3. Which type of structure of carboniun ion-
4. Which compound are isoelectronic with carbanions-
5. One of the modern methods of studying free radicals is-
6. What is the stability order of following radicals-
7. Give the one example of Gomberg Bachmann reaction-
8. Which type of carbine are more stable-
9. Which Hybridation are present in singlet nitrene-
10. In the Hafmann reaction the rate of Reaction are depended.

11. Define the Sautzeff rule-
12. Define the Hafmann rule-
13. What is the electrocyclic reaction-
14. Define the pericyclic reaction.
15. Define the cyclo addition reaction-
16. Give the one example of sigmatropic reaction-
17. Define the sigmatropic reaction-
18. Give the one example of cyclo addition reaction-
19. Give the one example of electrocyclic reaction-
20. What is the Fluorescence-
21. Define the phosphorescence process-
22. Which type of transition are possible in carbonyl compounds-
23. Define the paterno buchi reaction.
24. Define the Narrish cleavages.
25. Which type of transition are involved in photo chemical reaction of compound-
26. Give the one example of – — methane rearrangement.
27. Give the one example of suitable (2+2) cycloaddition reaction.
28. Which type of the production from following reaction
29. Define the barton reaction.
30. Which type of transition are present in Azo compound?
31. Define the conformers?
32. Define the Rotational Isomers?
33. Which compound are thermodynamically more stable :
(a) Meso isomer
(b) Active isomer
34. Give the one example of Meso isomer.
35. In following compound the stability order of conformers of cyclooctane is boat chair, crown, chair, Boart Boat, Boat.
36. Which form is more stable in Cyclooctane?
37. Write the name of compound gives cis-trans isomerisation.
38. Which type of compounds give the narrish type-II cleavage.
39. Which type of states involved in Narrish cleavages?
40. Which type of transition are possible when carbonyl compound are absorbed UV visible radition.
41. Which type of ransition are possible when Alkenes are absorbed UV-visible radition?
42. Define the photo sensitizer.
43. Define the fluroscence process?
44. Define the chromphere with example?
45. Define the phosphorescence process.
46. Complete the following reaction:
47. What are sigmatropic shift?
48. Give the one example of 𝛾-Elimanation reaction?
49. Define the fries rearrangement process.
50. In the curtius reactin acyl azides gives the product when are thermally decomposed.

51. Which intermediate are formed in wagner meerwein rearrangement?
52. Which Intermediate are forms in pinacol-pinacalone rearrangement.
53. Define the trans annulator rearrangements.
54. Give the structure of Arynes.
55. Give the structure of singlet Nitrene.
56. Give the structure of triplet Nitrene.
57. Give the structure of singlet carbine.
58. Define the carbenoids.
59. Carbenes are formed by following compound:
(a) Ketene (b) diazo compounds
60. Which type of cleavage are generated face radicals?
61. Which type of cleavage are generated carbonium ions?
62. Give the one example of addition reaction of free radials.
63. Which type of radicals detected by molecular weight determination?
64. Define the Redox reaction.
65. Which type of Intermediate are formed in decarboxylation reaction.
66. Give the one example of claisn ester condensation reaction.
67. Write the structure of carbanions.
68. Write the structure of carbonium ions.
69. Write the structure of tropane compound.

Section – B

1. How are carbonions detected- Outline the mechanism of Claisen
2. Write a short notes of Gomberg Bachmann reaction.
3. Write a notes of Auto oxidation with useful example.
4. Give the cyclopropanation reaction with useful example-
5. What is the arynes structure with suitable example-
6. Write short notes on :(a) Migratory aptitude
7. Discuss the mechanism of Baeyer-villiger oxidation.
8. Discuss the mechanism of the Wolff rearrangement.
9. Discuss the mechanism of an – 1reaction, with a suitable example.
10. What are pyrolytic elimination reactions- Explain with example.
11. Explain – 1mechanism with a suitable example.
12. What are pericyclic reachons- Explain their salient features.
13. Classify the following reactionsn as con and dis electro cyclic.
14. Explain the mechanism of following reactions :

Section – C

1. Explain the mechanism of Autoxidation of organic compounds.
2. Explain the Benzein condensation mechanism with suitable example.
3. Explain the following observations :(a) Trans-cyclooctene
4. State the principle of conservation of orbital symmetry.
5. Write short note on :(a) Perpendicular triplet state
6. What are the products in the following reactions-
7. Write short notes on :(a) The Barbon reaction
8. Discuss the relative stability (a) Ethylene chloro hydrins
9. Write short notes on :(a) Pitzer strain