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National Open University Exam Past Question – CHM305 JUNE/JULY 2013 EXAMINATION

NATIONAL OPEN UNIVERSITY OF NIGERIA

14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS SCHOOL OF SCIENCE AND TECHNOLOGY

JUNE/JULY EXAMINATION

 

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;

 

name the foll

 

(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:

  1. a) Friedel – Crafts acylation

 

  1. b) Cannizzaro Reaction c)        Saponification
  2. d) Aldol Condensation e)        Iodoform reaction

 

 

 

5 (a) Show the Cross Aldol condensation between the compounds below:

show the cros

(b) What are Quinones

CH3CHO

 

 

 

 

6  (a) What is Diels-Alder reaction?

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(b) Show the route of obtaining a product from the reaction of the two compounds below:

show the rout

 

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.

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