Get premium membership and access revision papers, questions with answers as well as video lessons.

Sch 2206: Environmental Chemistry Question Paper

Sch 2206: Environmental Chemistry

Course:Bachelor Of Industrial Chemistry

Institution: Dedan Kimathi University Of Technology question papers

Exam Year:2014

Page 1 of 1
DEDAN KIMATHI UNIVERSITY OF TECHNOLOGY
UNIVERSITY EXAMINATIONS 2014/2015
YEAR TWO SEMESTER ONE EXAMINATION FOR DEGREE OF BACHELOR OF
SCIENCE INDUSTRIAL CHEMISTRY AND BACHELOR OF SCIENCE LEATHER
TECHNOLOGY
SCH 2206: ENVIRONMENTAL CHEMISTRY
DATE: 21ST AUGUST 2014 TIME: 11.00am-1.00pm
INSTRUCTIONS: Answer Question ONE and any other TWO questions
QUESTION ONE (30 MARKS)
a) Distinguish between primary and secondary air pollutants. (4 Marks)
b) Discuss how the following important tests may be carried out in a water sample.
i. Total organic carbon (3 Marks)
ii. Bacterial measurements (3 Marks)
c) i. Explain the main role of ozone in the atmosphere. (2 Marks)
ii. Explain in detail how the ozone layer is depleted in the atmosphere. (4 Marks)
d) Particulates are some of the air pollutants produced in a cement manufacturing company.
Assume that you have been contracted by a cement company to advise them on how to
control particulates. Using diagrams explain in detail how your methods will work.
(10 Marks)
e) Explain how the ion-exchange process is used to purify drinking water. (4 Marks)
Question Two (20 Marks)
a) Describe in detail the sources and effects to the environment of the pollutants listed below
and their control.
i. Carbon monoxide (5 Marks)
ii. Oxides of nitrogen (NOX) (5 Marks)
iii. Oxides of sulphur (SOX) (5 Marks)
Page 2 of 2
b) Using five relevant examples explain the effects of metal particulates in the environment.
(5 Marks)
Question Three (20 Marks)
a) i. Distinguish between, classical and photochemical smog. (2 Marks)
ii. Using ethane as a typical hydrocarbon, discuss how photochemical smog is formed.
(8 Marks)
b) Explain the four problems associated with the increased use of persistent organochlorine
insecticides. (4 Marks)
c) i. List the four factors that affect the amount of dissolved oxygen in a water body. (2 Marks)
ii. Using a relevant example, how chemical oxygen demand (COD) may be measured a
water sample. (4 Marks)
Question Four (20 Marks)
a) i. Define natural scavenging process. (1 Mark)
ii. Discuss the natural scavenging process. (7 Marks)
b) Give a detailed account of the waste water treatment process. (use the activated sludge
process as your secondary process) (12 Marks)
Question Five (20 Marks)
a) Briefly discuss three methods used to estimate carbon monoxide pollutant in an air
polluted sample. (6 Marks)
b) Describe any two sources of water pollution. (4 Marks)
c) Global warming is nowadays a major concern to both developed and developing countries.
Explain the cause and three effects of global warming. (6 Marks)
d) List any four principles of green chemistry. (4 Marks)

Sch 2206: Environmental Chemistry Question Paper

More Question Papers

Popular Exams

Mid Term Exams

End Term 1 Exams

End Term 3 Exams

Opener Exams

Full Set Exams