Welcome to the Quiz!
This quiz contains 15 questions from a mix of 1 subtopics.
A substance that increases the rate of a reaction without being chemically changed, or used up, is called a .
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Do transition metals make good catalysts?
yes
no
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Should you include the catalyst in the chemical reaction as one of the reactants?
yes
no
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The two graphs above show the same chemical reaction, but in the presence and absence of a catalyst.
Which one shows the reaction occurring in the presence of a catalyst?
graph 2
graph 1
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Which of the following is an example of a reaction that uses homogeneous catalysis?
ozone depletion with chlorine radicals as a catalyst
making esters with sulfuric acid as a catalyst
catalytic converters in cars
making ammonia with iron as a catalyst
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Which type of catalyst has a different physical state from the reactants?
homogeneous
heterogeneous
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What is the purpose of a catalytic converter in a car?
to improve the acceleration of the car
to reduce the noise produced by the engine
to convert harmful exhaust gases into less harmful gases
to increase the fuel efficiency of the engine
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What is the term for a catalyst that has the same physical state as the reactants?
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Describe the effect of a catalyst on the activation energy and enthalpy change of a chemical reaction.
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What is the role of catalysts in a chemical reaction?
to decrease the activation energy
to increase the activation energy
to slow down the reaction rate
to change the equilibrium constant
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Which type of catalysis occurs when the catalyst is in the same phase as the reaction mixture?
heterogeneous catalysis
enzymatic catalysis
homogeneous catalysis
autocatalysis
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What is the term for the process in which reactant molecules become weakly bonded onto the surface of a solid catalyst?
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What is the term for the breaking of the bonds between product molecules and the surface of a solid catalyst?
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What is the effect of a catalyst on the Boltzmann distribution curve?
the curve becomes flatter
the curve becomes steeper
the curve remains unchanged
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How does adding a catalyst affect the x-axis of a Boltzmann distribution curve?
the activation energy position moves to the left
the activation energy position moves to the right
the average energy position moves to the left
the average energy position moves to the right
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