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Regents Chemistry Unit 9
Test Description: Kinetics and Equilibrium Fun!
Instructions: Answer all questions to get your test result.
1) Particles that collide with the correct amount of energy and in the proper orientation can lead to
A
Ineffective collisions
B
Altered Hemizygosity
C
Reciprocal transmutations
D
Effective collisions
2) In a diatomic molecule, what must occur to break the bonds that exist between the two molecules?
A
An increase in electronegativity of each atom
B
The hokey pokey
C
Energy must be absorbed
D
Energy must be released
3) A chemical reaction can only proceed as fast as the
A
Speed of sound
B
Electronegativities allow
C
Rate determining step
D
Speed of light
4) What type of substance can be added to a reaction to speed up the reaction by providing an alternate pathway?
A
Product
B
Inhibitor
C
Reactant
D
Catalyst
5) What type of substance can be added to a reaction to slow down the reaction by adding additional steps to the mechanism?
A
Reactant
B
Product
C
Inhibitor
D
Catalyst
6) Increasing the number of effective collisions will have what influence on chemical reaction rate
A
Remain the same
B
Increase
C
Decrease
D
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7) What type of reactions occur very quickly?
A
Violent
B
Covalent
C
Ionic
D
Metallic
8) What type of reactions occur very slowly and usually require a catalyst to proceed in biological systems?
A
Covalent
B
Violent
C
Metallic
D
Ionic
9) Increasing the temperature has what influence on reaction rate?
A
Increase
B
Remain the same
C
Decrease
D
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10) Increasing the concentration of reactants has what influence on reaction rate?
A
Decrease
B
Remain the same
C
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D
Increase
11) Increasing the surface area has what influence on reaction rate?
A
Uh, I like tacos
B
Remain the same
C
Decrease
D
Increase
12) In a written chemical equation, energy on the left side of the arrow indicates which type of reaction?
A
Ionic
B
Endothermic
C
Exothermic
D
Covalent
13) In a written chemical equation, energy on the right side of the arrow indicates which type of reaction?
A
Endothermic
B
Ionic
C
Covalent
D
Exothermic
14) What term is used to describe the amount of energy that is needed to start a chemical reaction?
A
Activation energy
B
Heat of the reaction
C
Entropy
D
Enthalpy
15) The difference between the energy of the reactants and the energy of the products in a chemical reaction is referred to as the
A
Heat of the reaction
B
Encephalopathy
C
Entropy
D
Activation energy
16) What must be true if a system is at equilibrium?
A
The temperature is 273 K
B
The rate of the forward reaction is the same as the rate of the reverse reaction
C
All reactants are gases
D
The amount of reactants is the same as the rate of the products
17) Reactions that have an increase in entropy tend to be favored. Which answer choice indicates an increase in entropy, the disorder of a system?
A
Gas to Liquid
B
Gas to Solid
C
Liquid to Solid
D
Solid to Liquid
18) What effect would increasing the concentration of a reactant have on a system at equilibrium?
A
Shift to the right
B
No effect
C
Shift to the left
D
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19) What effect would decreasing the concentration of a product have on a system at equilibrium?
A
Shift to the right
B
No effect
C
Shift to the left
D
Uh, I like tacos
*select an answer for all questions
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