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Samuels PS Kinetics
Test Description: Physical Science Kinetics.
Instructions: Answer all questions to get your test result.
1) The kinetic energy needed for molecules to chemically react is known as _____.
A
activation energy
B
concentration
C
potential energy
D
catalyst
2) If the concentration is increased the reaction rate will:
A
decrease
B
there is not enough information
C
increase
D
stay the same
3) In order to increase reaction rate by increasing surface area of a solid, which of the following would you do?
A
decrease the temperature
B
increase the pressure
C
make the pieces bigger by clumping them
D
make the pieces smaller by grinding them
4) What is a substance that alters the rate of a chemical reaction without being permanently changed in the chemical reaction?
A
coefficient
B
product
C
reactant
D
catalyst
5) In a chemical reaction, if the reaction occurs backward and forward at the same time and rate then the system is said to be at ________.
A
balanced
B
equilibrium
C
incomplete
D
inefficient
6) 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
7) A decrease in temperature will do what to a chemical reaction?
A
speed it up
B
slow it down
C
nothing
D
equalize it
8) In gases increasing pressure will increase the rate of reaction. Which factor does it fall under?
A
activation energy
B
surface area
C
temperature
D
concentration
9) If a reaction is at equilibrium the amount of the chemicals:
A
decrease
B
remain constant
C
increase
D
get used up
10) Why does increasing the kinetic energy of molecule make a reaction faster?
A
there are more collisions
B
there are more molecules
C
there are less molecules
D
there is more disorder
*select an answer for all questions
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