Question

Which of the following statements is true about catalysts?
a. Catalysts slow down the rate of chemical reactions.
b. All catalysts are enzymes.
c. Catalysts are used up during a chemical reaction.
d. Catalysts lower the activation energy of a chemical reaction.

Answer 1

The correct option is d) Catalysts lower the activation energy of a chemical reaction.

Explanation:

• Activation energy can be described as the minimum amount of energy that is required for a chemical reaction to occur.
• Catalyst function to lower this activation energy.
• Other options, such as option A, are not true because catalyst increase the speed of a chemical reaction.
• They do not lower the rate of a chemical reaction.

Answer 2

d. Catalysts lower the activation energy of a chemical reaction.