Chemistry Methods Question Paper

Chemistry Methods

Course:Bachelor Of Education

Institution: Kenyatta University question papers

Exam Year:2008

KENYATTA UNIVERSITY
UNIVERSITY EXAMINATIONS 2007/2008
INSTITUTE OF OPEN LEARNING
SUPPLEMENTARY/SPECIAL EXAMINATION FOR THE DEGREE OF
BACHELOR OF EDUCATION
ECT 305: CHEMISTRY METHODS

DATE: Tuesday 7th October, 2008

TIME: 1.00pm-3.00pm
________________________________________________________________________
INSTRUCTIONS
Answer Q1 and any other TWO

Q1.
(a)
(i)
As a topic “Alkanes” is commonly taught in high schools. A student you are teaching asked, “Sir/Madam what is the general formula of alkanes?” What answer would you give?
(ii)
The same student follows up, “Is there an exception?” What would be your comment?
(b)
(i)
Concept formation is recommended in the teaching and learning of Chemistry. Using the subject “Reactions of Halogens and Alkenes” show how TWO techniques illustrate concept formation.
(ii)
In what ways does repletion illustrate concept formation? Explain using group properties of families in the periodic table.
(c)
(i)
What would you tell a teacher who uses a water-type fire extinguisher on electronic fires.
(ii)
Sometimes a head to department is forced to buy chemicals in small quantities.
(d)
(i)
How would you treat a student who accidentally pour sulphuric acid on his/her skin?

2.
(a)
(i)
State clearly the roles of the teacher and learner in problem solving in chemistry.
(ii)
It is not always the case that subordinate skills underlie super ordinate skills. Exemplify.
(b)
(i)
You have the following item in your examination. “Write out all structures of chloropentane.” Write out these structures.
(ii)
On a marketing scheme of 10 marks, how would you distribute your marks? Explain your criteria.

3.
(a)
(i)
With reference to periodic table give ONE example each of lateral and vertical transfer.
(ii)
Colour codes are important in chemical modes. What colour codes would you assign to carbon and chlorine?
(b)
(i)
It is important to link classroom chemistry to industry. What is the one industrial importance of nitrogen that you would highlight in your teaching?
(ii)
Your demonstrating, “Reaction of sodium with water”. What laboratory precaution would you observe?

4.
(a)
Ammonia is a pyramidal structure compound. Please draw the structure of ammonium molecule.
(b)
Why is the ammonium molecule generally reactive going by your structure?
(c)
As you would to a high school class write out a complete symbol equation of the reaction between hydrogen chloride and ammonia.
5.
(a)
The chemistry of sulphur is taught at form one.
(i)
Write the symbol equation of the burning of sulphur in air.
(ii)
Write out the symbol equation of the product of (i) above with water.
(b)
It is important to link chemistry and environment. The Kyoto Convention is along this thinking.
(i)
Water is the main concern?
(ii)
Which emission does it aim to reduce?

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