NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY
COURSE CODE: CHM305
COURSE TITLE: ORGANIC CHEMISTRY TIME ALLOWED: 2 hours
INSTRUCTION: ANSWER ANY FIVE QUESTIONS
1 (a) Discuss the classes of alcohols based on the number of hydroxyl group and give one examples of each (name and structure).
(b) Name the following compounds;
(c) Discuss the esterification reaction of alcohols.
2 (a) Compare and contrast, ethers and alcohols. (b) Discuss the Williamson Synthesis.
(c) State the Physical and chemical properties of ethers.
3 (a) Epoxides are compounds formed when an oxygen atom is linked to the carbon chain forming a three membered ring. Discuss the methods of preparation of epoxides.
(b) List the reactions of epoxides.
(c) Choose one of the reactions listed in 3b above and discuss in detail.
4 Discuss the followings:
- a) Friedel – Crafts acylation
- b) Cannizzaro Reaction c) Saponification
- d) Aldol Condensation e) Iodoform reaction
5 (a) Show the Cross Aldol condensation between the compounds below:
(b) What are Quinones
6 (a) What is Diels-Alder reaction?
(b) Show the route of obtaining a product from the reaction of the two compounds below:
7 (a) With the aid of structures, differentiate between Thiophene, Pyrrole, and Furan. (b) Discuss briefly the physical and chemical properties of Pyrrole.
(c) Describe a test for Pyrrole.