What happens when a catalyst is added to a chemical reaction?
A) A new substance is formed
B) A physical reaction occurs
C) Speed of the reaction is decreased
D) Speed of the reaction is increased
Answer: D
Explanation: A) Incorrect. When a catalyst is added, the speed of the chemical reaction is increased, but the catalyst itself is not consumed in the reaction.
B) Incorrect. When a catalyst is added, the speed of the chemical reaction is increased, but the catalyst itself is not consumed in the reaction.
C) Incorrect. When a catalyst is added, the speed of the chemical reaction is increased, but the catalyst itself is not consumed in the reaction.
D) Correct. When a catalyst is added, the speed of the chemical reaction is increased, but the catalyst itself is not consumed in the reaction.
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