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Samuels CHEM Chemical Kinetics I
Test Description: Chemistry Chemical Kinetics I
Instructions: Answer all questions to get your test result.
1) The kinetic energy needed for molecules to chemically react is known as ______.
A
concentration
B
catalyst
C
potential energy
D
activation energy
2) If the concentration is increased the reaction rate will:
A
increase
B
decrease
C
stay the same
D
there is not enough information
3) In order to increase reaction rate by increasing surface area of a solid, which of the following would you do?
A
make the pieces bigger by clumping them
B
make the pieces smaller by grinding them
C
increase the pressure
D
decrease the temperature
4) What is a substance that alters the rate of a chemical reaction without being permanently changed in the chemical reaction?
A
reactant
B
catalyst
C
product
D
coefficient
5) What is not true of a catalyst?
A
lowers the activation energy
B
increases activation energy
C
written over the arrow
D
increases rate of reaction
6) A decrease in temperature will do what to a chemical reaction?
A
speed it up
B
equalize it
C
slow it down
D
nothing
7) Which of the following states that reactant particles must collide for a chemical reaction to occur?
A
kinetic theory
B
reaction theory
C
activation theory
D
collision theory
8) Which of the following is created as a temporary, high energy, unstable molecule during a reaction?
A
enthalpy complex
B
exothermic complex
C
endothermic complex
D
activated complex
9) The difference in amount of energy contained by the reactant and the products is known as ______.
A
endothermic of reaction
B
exothermic of reaction
C
activation energy
D
enthalpy of reaction
10) This looks at the rate of chemical reactions.
A
nuclear chemistry
B
biochemistry
C
equilibrium
D
chemical kinetics
*select an answer for all questions
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