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Science, Chemistry

10th -

11thgrade

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Chemical Reactions

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt

    What type of change occurs during a chemical reaction?

    chemical change

    physical change

    no change occurs

  • 2. Multiple Choice
    1 minute
    1 pt

    In this reaction, which substances are the reactants? Check all that apply.

    CH4 + 2O2 → CO2 + 2H2O

    CH4

    O2

    CO2

    H2O

  • 3. Multiple Choice
    1 minute
    1 pt

    Which of these would be evidence that a chemical reaction has occurred?

    Bubbles formed from heating the substance.

    A color change due to red food coloring being added to the reaction.

    An odor is detected that wasn't present before the reaction.

    A temperature change because the reaction was heated.

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