CBSE Class 10 Science: Chemical Reactions and Equations Quiz
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Questions and Answers

What occurs when one or more reactants are changed into one or more products?

  • Melting
  • Chemical change (correct)
  • Boiling
  • Physical change
  • In a chemical reaction, what happens to the constituent atoms of the reactants?

  • They remain unchanged
  • They are rearranged (correct)
  • They evaporate
  • They are destroyed
  • What are the products formed when copper sulphate reacts with iron?

  • Iron and copper sulphate
  • Ferrous sulphate and copper (correct)
  • Copper and iron sulphate
  • Copper sulphide and iron
  • What does science explain about chemical reactions?

    <p>How molecular interactions occur</p> Signup and view all the answers

    When do physical and chemical changes occur?

    <p>When a substance changes form</p> Signup and view all the answers

    What are the CBSE notes for Class 10 Science Chapter 1 known for?

    <p>Being comprehensive and detailed yet concise</p> Signup and view all the answers

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

    <p>Boiling of water</p> Signup and view all the answers

    What helps determine a chemical reaction?

    <p>Evolution of a gas</p> Signup and view all the answers

    In which type of chemical reaction do reactants transform into products by making or breaking bonds between different atoms?

    <p>Redox reaction</p> Signup and view all the answers

    What is a word equation in the context of chemical reactions?

    <p>A chemical reaction expressed in words rather than chemical formulas</p> Signup and view all the answers

    Which factor can help categorize chemical reactions?

    <p>Formation of a precipitate</p> Signup and view all the answers

    What occurs in an exothermic reaction?

    <p>Release of heat</p> Signup and view all the answers

    Which type of reaction involves the breakdown of a single compound into two or more simpler substances?

    <p>Decomposition reaction</p> Signup and view all the answers

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