Catalysts in Chemical Reactions Quiz

What is the primary role of a catalyst in a chemical reaction?

• To slow down the reaction

• To change the color of the reactants

• To speed up the reaction

• To increase the temperature of the reaction

In the video, what substance is used as a catalyst to speed up the breakdown of hydrogen peroxide?

• Copper sulfate

• Zinc chloride

• Manganese dioxide

• Iron oxide

What happens to a catalyst after a chemical reaction is complete?

• It remains unchanged and can be reused

• It changes into a different substance

• It is consumed and cannot be reused

• It evaporates

How do catalysts typically lower the activation energy of a reaction?

• By providing a surface for reactants to meet

• By changing the reactants into products

• By adding more reactants

• By increasing the temperature

Why are catalysts important in the manufacturing of chemicals?

• They speed up reactions, making production cheaper and more efficient

• They change the chemical properties of the products

• They increase the cost of production

• They make the process slower and more controlled