Chemical Changes vs Physical Changes Quiz
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Questions and Answers

What is the main difference between a physical change and a chemical change?

  • Physical changes do not produce new substances, while chemical changes involve the formation or breaking of chemical bonds. (correct)
  • Physical changes involve the formation or breaking of chemical bonds, while chemical changes do not.
  • Physical changes always involve a change in color or temperature, while chemical changes do not.
  • Physical changes produce new substances, while chemical changes do not.

    • Which of the following is an example of a chemical change?

  • Cutting a piece of paper
  • Melting ice cubes
  • Burning coal (correct)
  • Dissolving sugar in water

    • What is a chemical bond?

  • A process that separates atoms from each other
  • A force that holds atoms together in a molecule (correct)
  • A mixture of two or more substances
  • A change in the physical properties of a substance

    • Which of the following is NOT a sign that a chemical change has occurred?

    <p>Change in color due to the addition of food coloring (B)</p> Signup and view all the answers

    What is the fundamental difference between a mixture and a compound?

    <p>A mixture can be separated by physical means, while a compound cannot. (B)</p> Signup and view all the answers

    What is the significance of the formation or breaking of chemical bonds?

    <p>It changes the chemical properties of the substance, resulting in a new substance. (C)</p> Signup and view all the answers

    What is the primary evidence that a chemical change has occurred during the burning of charcoal?

    <p>The production of a gas molecule called carbon dioxide (C)</p> Signup and view all the answers

    Which of the following is NOT considered a chemical change?

    <p>Changing the color of tree leaves (B)</p> Signup and view all the answers

    What is the purpose of the arrow in a chemical equation?

    <p>To indicate the direction of the reaction (D)</p> Signup and view all the answers

    What is the law of conservation of mass?

    <p>Matter is neither destroyed nor created during a chemical reaction, but rather transforms from one form to another (D)</p> Signup and view all the answers

    What is the ratio of carbon (C) atoms to oxygen (O) atoms in a carbon dioxide (CO2) molecule?

    <p>1:2 (A)</p> Signup and view all the answers

    What is the purpose of a chemical equation?

    <p>All of the above (D)</p> Signup and view all the answers

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