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The Rate Law
Test Description: This is a formative assessment. Answer all questions and take a screenshot, then submit it on the google site.
Instructions: Answer all questions to get your test result.
1) For a reaction 2A + B 2C, with the rate equation: Rate = kA^2B
A
the order with respect to A is 1 and the order overall is 1.
B
the order with respect to A is 2 and the order overall is 2.
C
the order with respect to A is 2 and the order overall is 3.
D
the order with respect to B is 2 and the order overall is 3.
2) The minimum amount of energy needed to start a reaction is called the
A
Energy of reaction
B
Activation energy
C
Entropy of reaction
D
Reaction mechanism energy
3) A reaction was found to be zero order in A. Increasing the concentration of A by a factor of 3 will cause the reaction rate to _____.
A
Increase by a factor of 27
B
Triple
C
Increase by a factor of 9
D
Remain constant
4) As the temperature of a reaction is increased, the rate of the reaction increases because the __________.
A
Reactant molecules collide less frequently and with greater energy per collision
B
Activation energy is lowered
C
Reactant molecules collide more frequently and with greater energy per collision
D
Reactant molecules collide less frequently
5) The rate law for a reaction is kAB^2. Which one of the following statements is false?
A
The reaction is second-order overall
B
The reaction is first order in A.
C
k is the reaction rate constant
D
The reaction is second order in B.
6) The rate law is also known as the
A
rate theorem
B
rate equation
C
rate constant
D
chemical kinematics
7) For third-order reactions, the overall rate increases by eight times when the reactant concentration is
A
doubled
B
Negative
C
remains constant
D
halved
8) If the reaction is of the first order, doubling the reactant concentration will
A
double the reaction rate
B
half the reaction rate
C
nullify the reacton rate
D
tends to zero
9) Substances which undergo chemical reactions are called
A
None of the above
B
Products
C
Reactants
D
Both of these
10) Particles absorb more energy with the increase in the intensity of light thereby the rate of reaction
A
Decreases
B
Remains zero
C
Increases
D
Reduces to zero
*select an answer for all questions
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