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12 May, 16:24

Which of the following is most likely an indication of a chemical change?

A. A loud sound when an MP3 player is turned on

B. A loud sound when someone claps their hands

C. A loud sound when a starter's pistol is fired at a race

D. A loud sound when a large object falls to the ground

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Answers (1)
  1. 12 May, 20:22
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    Hello there!

    Question: Which of the following is most likely an indication of a chemical change?

    Answer Choices:

    A. A loud sound when an MP3 player is turned on.

    B. A loud sound when someone claps their hands.

    C. A loud sound when a starter's pistol is fired at a race.

    D. A loud sound when a large object falls to the ground.

    Correct Answer:

    C. A loud sound when a starter's pistol is fired at a race.

    Reasons:

    A would not be correct since an MP3 player is a mechanical object and does not mix any substances that create a reaction.

    B would not be correct since clapping hands causes a loud sound due to two forces slamming together and causes a disturbance in the air.

    D would not be correct since a large object falling to the ground does not indicate any chemical reactions or changes since its merely the result of a mass hitting another mass.

    C would be correct since the gunpowder mixes with other substances inside the pistol's chamber and causes and explosion, and explosions are part of a chemical reaction indicators.
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