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A catalyst reduces the activation energy in a chemical reaction. Which statement below is accurate?

1. The reaction rate is inversely proportional to activation energy.
2. The reaction rate is directly proportional to activation energy.
3. The reaction rate does not depend on activation energy.
4. The reaction rate diminishes as activation energy increases.

Correct answer: The reaction rate diminishes as activation energy increases.

Solution

A catalyst lowers the activation energy, which increases the rate of reaction because the rate is inversely related to activation energy. Lower activation energy means more molecules can overcome the energy barrier.

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