Chemistry: Matter and Change

Section 4: Instantaneous Reaction Rates and Reaction Mechanisms

Self Check Quizzes

1
What quantity is defined by the change in concentration of a component in a chemical reaction divided by the change in time of the reaction?
A)specific rate constant
B)rate order
C)instantaneous rate
D)catalyst
2
What is the slowest of the elementary steps in a complex reaction called?
A)mechanism
B)propagating step
C)rate-limiting step
D)fast step
3
What is the name given to a chemical produced in one elementary step and used up in a subsequent elementary step?
A)complex step
B)elementary step
C)reaction mechanism
D)intermediate
4
In the reaction of hydrogen peroxide, what happens to the instantaneous rate as time passes?

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A)the rate increases
B)the rate decreases
C)the rate stays the same
D)the rate doubles
5
In the reaction shown, what are the intermediates?

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A)NO and H2
B)N2O2 and H2
C)N2O2 and H2O
D)N2O2, H2O and H2
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