Chemical Reactions and Equations Quiz
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Questions and Answers

What is a chemical reaction?

  • When reactants remain unchanged after interaction
  • When a new substance with new properties is formed (correct)
  • A physical change with no new substance formed
  • When atoms are rearranged without forming new substances

    • In a chemical reaction, what happens to the constituent atoms of the reactants?

  • They are rearranged to form new substances (correct)
  • They transform into different elements
  • They remain unaffected
  • They disintegrate completely

    • What distinguishes a physical change from a chemical change?

  • Formation of new substances with new properties (correct)
  • Rearrangement of atoms without any change in properties
  • Complete disintegration of the original substances
  • Change in physical appearance without new substance formation

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

    <p>Water changing to steam on boiling</p> Signup and view all the answers

    What kind of changes occur when copper sulphate reacts with iron?

    <p>Formation of ferrous sulphate and copper</p> Signup and view all the answers

    How can you determine a chemical reaction?

    <p>By observing if new substances are formed</p> Signup and view all the answers

    What allows differentiation between steam and water when they react with sodium?

    <p>They react in the same way and give the same products</p> Signup and view all the answers

    When does a chemical reaction involve only a change in state?

    <p>When there's no formation of new substances</p> Signup and view all the answers

    What happens during a physical change?

    <p>Only physical appearance is altered with no new substances formed</p> Signup and view all the answers

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