Chemical Reactions Quiz
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Questions and Answers

What are the substances which take part in a chemical reaction called?

  • Products
  • Equations
  • Catalysts
  • Reactants (correct)

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

  • Melting of ice
  • Boiling of water
  • Rusting of Iron (correct)
  • Dissolving sugar in water

    • What helps to determine whether a chemical reaction has taken place?

  • Change in volume
  • Change in state (correct)
  • Change in density
  • Change in shape

    • What is a chemical equation?

    <p>A symbolic representation of a chemical reaction (C)</p> Signup and view all the answers

    Why is it important to mention the physical state of the reactants and products in a chemical equation?

    <p>To make the chemical reaction more informative (D)</p> Signup and view all the answers

    Which observation helps to determine whether a chemical reaction has taken place?

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

    What is the symbolic representation of a chemical reaction called?

    <p>Chemical equation (C)</p> Signup and view all the answers

    What are the substances formed in a chemical reaction called?

    <p>Products (A)</p> Signup and view all the answers

    What does the Law of Conservation of Mass state?

    <p>Mass remains constant in a chemical reaction (C)</p> Signup and view all the answers

    Why is it important to mention the physical state of the reactants and products in a chemical equation?

    <p>To make the reaction more informative (C)</p> Signup and view all the answers

    Which of the following is a necessary condition to determine whether a chemical reaction has taken place?

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

    What is the symbolic representation of a chemical reaction called?

    <p>Molecular equation (A)</p> Signup and view all the answers

    Which method is used to balance chemical equations based on the Law of Conservation of Mass?

    <p>Fractional coefficients method (A)</p> Signup and view all the answers

    Which observation helps to determine whether a chemical reaction has taken place?

    <p>Evolution of heat (B)</p> Signup and view all the answers

    What does the symbol (aq) represent in a chemical equation?

    <p>Aqueous solution (A)</p> Signup and view all the answers

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