Physical and Chemical Changes Quiz
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Questions and Answers

Which of the following is a characteristic feature of physical changes?

  • Accompanied by energy change
  • Change in the chemical composition
  • No change in the identity of the substance (correct)
  • Formation of new substances
  • When a tree grows taller, what type of change is it considered?

  • Biological change (correct)
  • Physical change
  • Chemical change
  • Mechanical change
  • Which of the following is a common misconception about chemical changes?

  • The original substance maintains its identity
  • The change is generally temporary
  • The original substance is completely lost (correct)
  • The change is not accompanied by energy change
  • When a nail rusts, what type of change does it represent?

    <p>Chemical change</p> Signup and view all the answers

    Which process involves a change in the molecular structure of substances?

    <p>Chemical change</p> Signup and view all the answers

    In which of the following scenarios is energy always absorbed or released?

    <p>Chemical change</p> Signup and view all the answers

    Which characteristic feature is typically associated with chemical changes?

    <p>The identity of the original substance is completely lost</p> Signup and view all the answers

    Which process is an example of a chemical change?

    <p>Fermentation of grapes</p> Signup and view all the answers

    What drives the formation of chemical bonds?

    <p>Attainment of a complete octet configuration</p> Signup and view all the answers

    Which type of change best defines a chemical reaction?

    <p>A process where new substances with entirely new properties are formed</p> Signup and view all the answers

    What precaution should be taken during the reaction between magnesium and oxygen?

    <p>Wear eye protection</p> Signup and view all the answers

    Why is cleaning the magnesium ribbon with sandpaper necessary before burning it?

    <p>To remove impurities</p> Signup and view all the answers

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