Physical Science --- Chapter 6

10 Questions | Total Attempts: 173

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Chapters Of Physical Science Quizzes & Trivia

Chapter 6 Chemical Reactions.


Questions and Answers
  • 1. 
    A synthesis reaction is a reaction between at least two compounds in which
    • A. 

      A compound is decomposed by an electric current.

    • B. 

      One breaks down into at least two products.

    • C. 

      A compound burns in the presence of oxygen.

    • D. 

      A new, more complex compound is formed.

  • 2. 
    Which statement about endothermic reactions is correct?
    • A. 

      Energy is always created in the form of heat.

    • B. 

      Energy is transferred from the surroundings to the reactants.

    • C. 

      Energy is transferred from the reactants to the surroundings.

    • D. 

      Energy is used to force electrons to move to higher energy levels.

  • 3. 
    A change in color, such as rusting of metal, is a sign that
    • A. 

      A chemical change is taking place.

    • B. 

      A physical change has just occurred.

    • C. 

      Organic chemicals are present.

    • D. 

      Oxygen is present.

  • 4. 
    When water is broken down by electrolysis, the products are
    • A. 

      Water and carbon dioxide

    • B. 

      Hydrogen and oxygen ions

    • C. 

      Hydrogen gas and oxygen gas

    • D. 

      Oxygen and methane

  • 5. 
    All of the following factors may speed up a chemical reaction except
    • A. 

      Smaller surface area

    • B. 

      Higher pressure

    • C. 

      Higher temperature

    • D. 

      Presence of a catalyst

  • 6. 
    What happens in a chemical reaction?
    • A. 

      Atoms are destroyed.

    • B. 

      Atoms are created.

    • C. 

      Atoms are heated and cooled.

    • D. 

      Atoms are rearranged.

  • 7. 
    A substance that undergoes a change in a chemical reaction is
    • A. 

      A product.

    • B. 

      A chemical.

    • C. 

      A reactant.

    • D. 

      An enzyme.

  • 8. 
    In a balanced chemical reaction, the total mass of the products always equals the
    • A. 

      Atomic mass of the reactants.

    • B. 

      Proportional masses of the reactants.

    • C. 

      Molar mass of the reactants.

    • D. 

      Total mass of the reactants.

  • 9. 
    The product of the synthesis reaction between sodium and chlorine gas is
    • A. 

      Carbon dioxide.

    • B. 

      Polyethylene.

    • C. 

      Sodium chloride.

    • D. 

      Copper (II) chloride.

  • 10. 
    In an exothermic reaction, energy is transferred from
    • A. 

      The surroundings to the reactants.

    • B. 

      One reactant to another.

    • C. 

      The container to the chemicals.

    • D. 

      The reactants to the surroundings

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