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9th Class General Knowledge Science and Technology Question Bank Science and Technology

  • question_answer
    Physical changes are changes affecting the form of a chemical substance, but not its chemical composition. Which of the following can bring about a change in the physical state of matter?

    A)  When energy is taken out of the system

    B)  When energy is added to the system

    C)  Both A and B

    D)  Energy change is not required.

    Correct Answer: C

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