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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Context: In a laboratory experiment, the decomposition of hydrogen peroxide is much faster when manganese dioxide is added. What role does manganese dioxide play in this reaction?
Define the term 'catalyst' in chemistry.
Describe the difference between a homogeneous and a heterogeneous catalyst.
Describe what is meant by 'catalytic poisoning'.
Explain how a catalyst affects the rate of a chemical reaction.
Explain why a catalyst does not affect the equilibrium position of a reversible reaction.
Explain why the use of a catalyst is considered environmentally beneficial in industrial processes.
Context: In a laboratory experiment, the decomposition of hydrogen peroxide is much faster when manganese dioxide is added. What role does manganese dioxide play in this reaction?
In the contact process for manufacturing sulfuric acid, which catalyst is used? (1) Iron (2) Vanadium(V) oxide (3) Platinum (4) Nickel
Which of the following best describes a homogeneous catalyst? (1) It is in the same phase as the reactants. (2) It is in a different phase than the reactants. (3) It is always a solid. (4) It is always a gas.
Which of the following is a characteristic of an enzyme? (1) Works at high temperatures (2) Is a protein (3) Is a metal (4) Is always inorganic
Which of the following is a heterogeneous catalyst? (1) Enzyme in digestion (2) Iron in the Haber process (3) Acid in esterification (4) Base in saponification
A catalyst is not ________ in the overall chemical reaction.
A catalyst provides an alternative reaction pathway with ________ activation energy.
Fill in the blank: Enzymes are ________ catalysts.
Fill in the blank: The substance that increases the rate of a reaction without itself undergoing any permanent chemical change is called a ________.
Does a catalyst change the enthalpy change (ΔH) of a reaction? Yes or No.
True or False: A catalyst lowers the activation energy required for a chemical reaction to occur.
True or False: Catalysts can be both organic and inorganic substances.
True or False: Catalysts can be used repeatedly in chemical reactions.
