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Organic Chemistry Question Paper

Organic Chemistry

Course:Bachelor Of Science

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2008/2009
SECOND SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
SCIENCE
HFN 201:
ORGANIC CHEMISTRY
================================================================
DATE: FRIDAY 11TH SEPTEMBER 2009
TIME: 2.00 P.M. – 4.00 P.M.

INSTRUCTIONS:
Answer ALL Questions from this section.

Q. 1
Give the structures of the isomers of an alkane with the molecular formula C5H12. (6 marks)
Q.2
Give the IUPAC names for the following organic compounds
a)
CH3 CH(CH3) CH2 CH2 CH3
b)
CH3
c)
Br
CH2 CHCHCH2 Br (6 marks)
Q.3
Identify the reagents for the following chemical conversions.
a)
CH3 CH(CI)CH3
CH3 CH CH2
b)
c)
CH3 CH2 CH2OH
CH3COO CH2 CH2CH3
(6 marks)
Q.4
Write the mechanism for the following reaction.
CH2 CHCH2 CH3 + HBr
Peroxide
Br CH2CH2CH2CH3
(6 marks)
Q.5
Show how you could prepare Ethyne (acetylene) from Ethylene. (6 marks)

SECTION B
Answer TWO questions only from this section.
Q.6
a)
Give the characteristics of an SNI reaction mechanism.
b)
Explain the factors that influence elimination or substitution in a reaction.
c)
Give the mechanism for the reaction between propyl bromide and sodium ethoxide. (20 marks)
Q.7
Explain how to distinguish the following organic compounds by suitable chemical reaction
a)
Ethanol and Ethanal
b)
Propanoic Acid and Ethylpropanoate
c)
Butene and Butane
d)
I - Butanol and 2 – Butanol
e)
Methylamine and methylethanamide.
(20 marks)
Q.8
Write explanatory notes on each of the following
a)
Rancidity of oils
b)
Substitution in benzene ring
c)
Polymerization of Alkenes
d)
Amino acids structure and classification.
(20 marks)

Organic Chemistry Question Paper

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