Which of the following statements are true of catalysts? Select all correct answers.
A. They are used up in the reaction.
B. They increase the rate of reactions.
C. They are considered reactants in chemical reactions.
D. They lower activation energy.

Catalysts are substances that take are added to the reaction to increase the speed of the reaction and, it does not get consumed in the reaction. A biological catalyst is an enzyme.

They increase the rate of reaction and when the rate increases the activation energy gets low.

Thus, the correct options are B and D.

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Which of the following statements are true of catalysts? Select all correct answers. A. They are used up in the reaction. B. They increase the rate of reactions. C. They are considered reactants in chemical reactions. D. They lower activation energy.

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What is a catalyst?

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Which of the following statements are true of catalysts? Select all correct answers.
A. They are used up in the reaction.
B. They increase the rate of reactions.
C. They are considered reactants in chemical reactions.
D. They lower activation energy.