Question

which statement about catalysts is true? catalysts always change states of matter during the reaction. catalysts increase the rate of the reaction. catalysts serve the same function as inhibitors. catalysts increase the activation energy required for the reaction.

Explanation:

• Analyze each option:
• "Catalysts always change states of matter during the reaction": Catalysts can remain in the same state (e.g., solid catalysts in gas reactions), so this is false.
• "Catalysts increase the rate of the reaction": By definition, catalysts (positive catalysts) speed up reactions by lowering activation energy, so this is true.
• "Catalysts serve the same function as inhibitors": Inhibitors slow reactions, catalysts speed them, so false.
• "Catalysts increase the activation energy required for the reaction": Catalysts lower activation energy, so false.

Answer:

B. Catalysts increase the rate of the reaction.