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    Question

    Which substance changes the rate of chemical reactions and remains chemically different during reaction?

    A Reactor Correct Answer Incorrect Answer
    B Solvent Correct Answer Incorrect Answer
    C Trigger Correct Answer Incorrect Answer
    D Exposure Correct Answer Incorrect Answer

    Solution

    "Trigger" loosely, it could be seen as a factor that initiates or changes the rate of a reaction. Typically, in chemistry, such a role is played by a catalyst, but a catalyst does not undergo permanent chemical change itself.

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