A

Admin • 807.45K Points
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Q. Which of the following best defines a catalyst?

  • (A) A substance that slows down reactions
  • (B) A substance that speeds up reactions without being consumed
  • (C) A substance that changes the products
  • (D) A substance that increases activation energy
Explanation by: Admin
Catalysts, including enzymes, speed up reactions without undergoing permanent change.

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