NATIONAL OPEN UNIVERSITY OF NIGERIA
14/16 AHMADU BELLO WAY, VICTORIA ISLAND, LAGOS
SCHOOL OF SCIENCE AND TECHNOLOGY
MARCH/APRIL 2014 EXAMINATION
COURSE CODE: CHM 311
COURSE TITLE: PETROLEUM CHEMISTRY
TIME ALLOWED: 2HOURS
INSTRUCTION:ANSWER ANY 4 QUESTIONS
1. (a) What do the following terms mean?
(i) Kerogen (ii) Allochthonous (iii) Autochthonous (2 mks each)
(b) What is Metagenesis? Discuss. (6 ½ mks)
(c) What are the advantages of the use of liquid methane as a jet engine fuel? (5mks)
(d) How are oil wells characterized on the basis of their purpose? (4 mks)
2. Write short notes on each of the following:
(i) Oil in Place (10 mks) (ii) Formation Volume Factor (7 ½ mks)
3. Write extensively on each of the following in relation to determining the properties of crude oil. (i)Salt content (5 ½ mks) (ii) Sulphur content (6mks)
(iii) Pour point (6 mks)
4. (a) Mention the six (6) main categories of unconventional natural gas. (6mks)
(b) What reasons accounts for a gas reserve being economically stranded? (4 mks)
(c) In just few lines, identify the various ways of Natural gas formation. (6mks)
(d) State one difference between conventional & unconventional natural gas. (1½ mk)
5. (a) How would you explain the term “Cracking”? (6 mks)
(b) List three (3) methods by which acid gases can be reduced or removed from
Natural gas. (3 mks)
(c) What is the essence of removing moisture from Natural gas? (2 ½ mks)
(d) Natural Gas Liquids are normally fractionated into three (3) streams.
List and mention the use of each stream. (6 mks)
6. (a) How would you explain the following:
(i) Petroleum (5 ½ mks) (ii) The Carbon Cycle (10 mks)
(b) What is Biomass? (2 mks)
For the 2015 – till date past questions for this course CLICK HERE
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