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2026 /
Quiz 5

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MDCAT Practice Test - Practice Test - Chemistry - Reaction Kinetics - 2026 Quiz

Attempt 10 MCQs on MDCAT Practice Test - Practice Test - Chemistry - Reaction Kinetics (Year 2026) | Quiz 5

41. For an elementary reaction, how does order relate to molecularity?

Order equals molecularity
Order is always integer
Order is half-life
Order is rate constant

42. Which step determines the overall reaction rate?

Rate-determining step
Fast step
Equilibrium step
Initial step

43. If rate = k[A]^2, what is the order and likely molecularity?

2
1
0
3

44. What is the order of N2O5 decomposition?

First order
Second order
Zero order
Third order

45. What is the order of the reaction 2NO2 -> 2NO + O2 if rate = k[NO2]^2?

Second order
First order
Zero order
Third order

46. Which plot gives a straight line for a first-order reaction?

ln[A] vs t
[A] vs t
1/[A] vs t
[A]^2 vs t

47. Which plot gives a straight line for a second-order reaction?

1/[A] vs t
[A] vs t
ln[A] vs t
[A]^2 vs t

48. Which plot gives a straight line for a zero-order reaction?

[A] vs t
ln[A] vs t
1/[A] vs t
[A]^2 vs t

49. What are the units of k for different orders?

s^{-1} for first order
L mol^{-1} s^{-1} for second order
mol L^{-1} s^{-1} for zero order
All of these

50. What is true about half-life of a first-order reaction?

Constant
Variable
Depends on initial concentration
Depends on temperature only

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