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Test List
Name:
Chemistry 3
Created By:
V. Gokal
Max Time:
5 mins
Select an option for each question and click Submit
1. Study the graph. The activation energy, in kJ.mol
-1
for the reverse reaction is …
35
50
85
-50
2. Consider the following equation of a reversible reaction.
Which set of factors below would favour the formation of orange dichromate ion? Temp / H
+
Decrease / Increase
Decrease / Decrease
Increase / Increase
Increase / Decrease
3. The following reversible reaction is used in the production of hydrogen iodide gas:
H
2
(g) + I
2
(g) ↔ 2HI(g) ΔH<0
The graph X was obtained under certain conditions.
Graph Y was obtained for the same experiment using the same amount of H
2
(g).
What changes were done to obtain graph Y?
More I
2
(g) was added and the temperature was decreased.
The temperature and pressure was decreased.
A catalyst was added and the temperature was increased.
A catalyst was added and the temperature was decreased.
4. A saturated solution of copper sulphate is in equilibrium with its ions.A few drops of concentrated H
2
SO
4
is then added while T remains constant. Equilibrium is re-established. How will the product [Cu
2+
][SO
4
2-
] now compare to what they were originally?
Remains the same
Increases
Decreases
Cannot be determined
5. Which one of the following half-cells would have to be connected to a Pb/Pb
2+
half-cell to obtain a voltmeter reading of 0,27V in the following standard electrochemical cell?
Pt, H
2
S / S
Cd/Cd
2+
Cr/Cr
3+
Sn/Sn
2+
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