Environmental Chemistry Question Paper

Environmental Chemistry

Course:Bachelor Of Environmental Studies

Institution: Kenyatta University question papers

Exam Year:2009

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2009/2010
FIRST SEMESTER EXAMINATION FOR THE DEGREE OF BACHELOR OF
ENVIRONMENTAL SCIENCE
ENS 131: ENVIRONMENTAL CHEMISTRY

DATE: TUESDAY, 22ND DECEMBER 2009

TIME: 8.00 A.M. - 10.00 A.M.

INSTRUCTIONS: Answer question One and any other Three

Illustrate your answers with suitable diagrams.

1.
a)
Describe three accurate volume measuring devices and their uses. (9 marks)

b)
Discuss the causes and precautionary measures for the following
laboratory
accidents:

i)
Burns

(2 marks)

ii)
Cuts

(2 marks)
iii)
Explosions
(2
marks)

c)
Explain the importance of making a choice on the filter and filter
medium
to
use
in
filtration.
(5
marks)

d)
Discuss the ideal characteristics of a washing liquid and explain how a

precipitate is washed.

(5 marks)

2.
Discuss any major five parameters and how you would measure them to

recommend a reservoir for fishery development.

(15 marks)

3.
a)
Explain the trend of the following across and down the periodic table.

i)
Ionic radius

(1 mark)
ii)
Metallic
character
(1
mark)

Page 1 of 2

b)
Show the electronic configuration of the following elements and

explain the trend in their ionization energy: Berlyllium, carbon,
nitrogen,
oxygen,
fluorine
and
Neon.
(12
marks)

4.
Discuss the effects of carbon dioxide on the environment and suggest
practical
interventions. (15
marks)

5.
Write short notes on five heating methods used in the laboratory and explain

the conditions under which each is used.

(15 marks)

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