An Effective Teaching Strategy
The following is an example of how a Teaching Assistant can enhance his/her Class Instruction with the aid of Students' Online Responses. It also helps students improve their performance in the given subject.
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2003
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Name :
University Registration Number:
Practice Test no. 1
Q. 0.98 L of edible oil (density = 1.1 g ml
-1
) weighs
more
less
than a kilogram of the same.
A large number of students tend to GUESS the correct answer if the test is designed in this way. The probability of getting a correct GUESS can be significantly reduced by setting the question in such a way, that it becomes necessary for the student to make the appropriate calculations before arriving at the result. Hence, the above question should be re-designed as follows :
1. 0.98 L of edible oil (density = 1.1 g ml
-1
) weighs
gms
more
less
than a kilogram of the same.
2. What are the degenerate states of an energy level with n
x
=4, n
y
=5 and n
z
=1 ?
3. Which SI unit is associated with the term 'exp (-E
1
/kT)' ?
(Hint: b = e
c
implies that log
e
b = c...!)
4. How many chiral carbons are present in the following compounds ?
a. o-Nitroaniline
b. Cyclohexanol
c. 3-Ethyl-1-hexene
d.
Buckminsterfullerene
5. An octahedron has
faces,
vertices and
edges.
(Hint: Verify using the formula F + V = E + "?")
6. Derive the expression for the half-life (t
1/2
) of a radioactive decay process.
(Hint: Refer to the rate law for first-order reactions.)
7. During
ab initio
computations, a linear combination of Gaussian functions is used to mimic a
Plot the corresponding graphs of both these functions on the same axis, for identical values of the variable 'x'. What do you observe ?
8. Write a small program (in FORTRAN or QBasic) to calculate the activation energy 'E
act.
' , by employing the Arrhenius equation.
9. How is the boiling point of a substance related to the following ?
a. Surrounding pressure conditions.
b. The nature of bonding. (ionic/covalent)
c. Inter-molecular hydrogen bonding.
10. Write a brief essay on a topic of
scientific interest
and make a list of all the references. Point out the limitations of your search (if any) and try to estimate the significance of the chosen topic.
(CGI-courtesy: www.geocities.com)
http://www.geocities.com/chemistry7000