Catalysts in Chemical Reactions
Chemistry ⇒ Chemical Reactions and Equations
Catalysts in Chemical Reactions starts at 9 and continues till grade 12.
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A reaction proceeds much faster in the presence of a catalyst. What does this suggest about the activation energy of the catalyzed reaction compared to the uncatalyzed reaction?
A student adds manganese dioxide to hydrogen peroxide and observes rapid bubbling. What is the role of manganese dioxide in this reaction?
Describe the difference between a homogeneous and a heterogeneous catalyst.
Describe what happens to a catalyst at the end of a chemical reaction.
Explain how a catalyst affects the activation energy of a reaction.
Explain why catalysts are important in industrial chemical processes.
A reaction proceeds much faster in the presence of a catalyst. What does this suggest about the activation energy of the catalyzed reaction compared to the uncatalyzed reaction?
A student adds manganese dioxide to hydrogen peroxide and observes rapid bubbling. What is the role of manganese dioxide in this reaction?
Which of the following best describes the role of a catalyst in a chemical reaction?
(1) It increases the temperature of the reaction.
(2) It provides an alternative pathway with lower activation energy.
(3) It increases the concentration of reactants.
(4) It changes the chemical nature of the reactants.
Which of the following is a characteristic of a catalyst?
(1) It increases the activation energy.
(2) It is chemically unchanged at the end of the reaction.
(3) It decreases the rate of reaction.
(4) It is always a liquid.
Which of the following is an example of a catalyst used in the decomposition of hydrogen peroxide?
(1) Iron
(2) Manganese dioxide
(3) Sodium chloride
(4) Copper sulfate
Which of the following is an example of a homogeneous catalyst?
(1) Platinum in hydrogenation
(2) Sulfuric acid in esterification
(3) Iron in the Haber process
(4) Vanadium(V) oxide in the contact process
Fill in the blank: Enzymes are __________ catalysts found in living organisms.
Fill in the blank: In the Haber process for ammonia synthesis, the catalyst used is __________.
Fill in the blank: The catalyst used in the contact process for the manufacture of sulfuric acid is __________.
Fill in the blank: The catalyst used in the hydrogenation of vegetable oils is usually __________.
True or False: A catalyst changes the amount of products formed in a chemical reaction.
True or False: Catalysts are always solids.
True or False: Catalysts can be both organic and inorganic substances.
True or False: Catalysts can be specific to certain reactions and may not work for others.
