Kinetics Practice MCQ's
Quiz
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Chemistry
•
12th Grade
•
Practice Problem
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Medium
+3
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Jacqueline Bakalov
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78 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The initial-rate data in the table above were obtained for the reaction represented below. What is the experimental rate law for the reaction? A + B → 2 C
rate = k[A][B]
rate = k[A][B]²
rate = k[A]²[B]³
rate = k[A]²[B]²
rate = k [A] [B]
Tags
NGSS.HS-PS1-5
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
For the reaction for which rate law is given below a plot of which of the following is a straight line?
rate=k[A]2
Tags
NGSS.HS-PS1-5
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When the concentration of substance Y in the reaction 2 X₍g₎ + Y₍g₎ → 2 Z₍g₎ is doubled, all other factors being held constant, it is found that the rate of the reaction quadruples. The most probable explanation for this observation is that
substance X is not involved in any of the steps of the mechanism.
substance Y is involved in the rate-determining step of the mechanism but is not involved in subsequent steps.
substance Y is probably a catalyst and thus speeds up the rate of the reaction.
the reactant with the smallest coefficient in the balanced equation generally has the greatest effect on the rate of the reaction.
the order of the reaction with respect to Y is 2.
Tags
NGSS.HS-PS1-5
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The proposed steps for a catalyzed reaction between X⁺ and Z⁻ are represented in the image. The catalyst in this process is
X⁺
X²⁺
Y⁴⁻
Y²⁻
Z⁻
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The balanced equation for the reaction of nitrogen dioxide and fluorine is
2 NO₂ + F₂ → 2 NO₂F.
The proposed mechanism is in the image. Which of the following are correct?
I. The mechanism supports an experimentally determined rate law of rate = k[NO₂]²[F₂]
II. F is an intermediate
III. The reaction is first order in F₂
I only
I and II only
I and III only
II and III only
I, II, and III
Tags
NGSS.HS-PS1-5
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Each of the following is true about heterogeneous catalyst EXCEPT
Its presence changes the rate of chemical change.
It does not undergo a permanent change.
It is in the same phase as the reacting particles.
Its presence lowers the activation energy of the overall reaction.
Its presence decreases the potential energy of the activated complex.
Tags
NGSS.HS-PS1-4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1
2
3
5
6
Tags
NGSS.HS-PS1-5
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