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- 1. Multiple Choice
Which of these factors increase the rate of a reaction?
increasing temperature
increasing concentration
adding a catalyst
All of these
- 2. Multiple Choice
Under the collision theory, the particles must collide with ____ and ____ for a reaction to occur.
sufficient rate and sufficient energy
sufficient surface area and the correct orientation
sufficient catalyst and sufficient energy
sufficent energy and the correct orientation
- 3. Multiple Choice
Given the following balanced equation :
2NO(g) + Cl2(g) → 2NOCl(g)
If the rate of disappearance of Cl2 is 4.84 x 10-2 M/s, what is the rate of disappearance of NO?
1.45 x 10-2 M/s
2.42 x 10-2 M/s
4.84 x 10-2 M/s
9.68 x 10-2 M/s
- 4. Multiple Choice
Given the reaction: 2 A + B --> 3 C,
if the rate of formation of C is 12 M/s, what is the rate of reaction?
4 M/s
12 M/s
6 M/s
36 M/s
- 5. Multiple Choice
Given the following rate law,
rate = k[A]2[B]
if [A] were doubled, what must happen to [B] to maintain the same rate of reaction?
[B] must quadruple
[B] must double
[B] must be cut in half
[B] must decrease by a factor of 4
- 6. Multiple Choice
The following data were measured for a reaction where BF3 and NH3 are reactants.
What is the rate law for the reaction?
rate = k[NH3]
rate = k[BF3]2[NH3]
rate =
k[BF3][NH3]
rate =
k[BF3][NH3]2
- 7. Multiple Choice
The decomposition of compound A is a first-order process. The rate constant for this reaction is 0.030 min-1 at 100oC . Calculate the half-life of A.
1.5 min
8.3 min
23 min
67 min
- 8. Multiple Choice
A reaction has the following rate law: rate = k[A]
The rate constant is 0.50 M-1s-1. If the initial concentration of A is 0.10 M, how long will it take for [A] to drop to 0.025 M?
0.70 s
1.4 s
2.8 s
5.6 s
- 9. Multiple Choice
In a second-order reaction, the initial concentration of reactant A is 0.24 M. If the rate constant is 8.1 x 10-2 M-1 s-1, what is the concentration of A after 29 seconds?
0.023 M
0.15 M
0.30 M
6.5 M
- 10. Multiple Choice
This is a proposed mechanism for the decomposition of ozone:
step 1: O3 → O2 + O
step 2: O3 + O → 2 O2
The oxygen atom (O) is considered to be a(n) _____?reactantcatalystintermediate
activated complex - 11. Multiple Choice
What is the enthalpy change for the reaction (ΔH)?
-40 kJ
-20 kJ
80 kJ
60 kJ
20 kJ
- 12. Multiple Choice
What is the activation energy for this energy profile curve?
150 kJ
250 kJ
50 kJ
200 kJ
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