13
QuizMultiple Choice

Catalysts

Question 13 • Chemistry - SC3210 A-CR

What overall effect does adding a catalyst have on a chemical reaction?

Answer
A
It increases pressure on the system.
B
It increases reactant surface area.
C
It lowers the activation energy that is needed.
D
It lowers the concentration of reactants.

Explanation

A catalyst provides an alternative reaction pathway with a lower activation energy, the minimum energy needed for the reaction to proceed. This makes the reaction faster without increasing pressure, changing reactant surface area, or lowering reactant concentration. The correct choice is “It lowers the activation energy that is needed.”

AI-written and checked against the verified answer.

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