Chapter 5: Quiz - Vocabulary-chemical Reactions (19 Terms)

19 Questions

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Chapter  5:  Quiz - Vocabulary-chemical Reactions (19 Terms)

VA SOLs: PS4c PS. 5a, c, PS6a, b, c


Questions and Answers
  • 1. 
    What is a reaction in which one element replaces another in a compound, or in which two elements in a different compounds trade places?
    • A. 

      Synthesis

    • B. 

      Decomposition

    • C. 

      Inhibitor

    • D. 

      Replacement reaction

  • 2. 
    What is a solid that forms from a solution during a chemical reaction?
    • A. 

      Concentration

    • B. 

      Catalyst

    • C. 

      Precipitate

    • D. 

      Product

  • 3. 
    What is a chemcal reaction that breaks down a compound into simpler products?                                                                                  2 H2O2    yields    2 H2O + O2                                      (could not use yields symbol, the arrow) 
    • A. 

      Decomposition

    • B. 

      Activation energy

    • C. 

      Enzyme

    • D. 

      Fuel

  • 4. 
    What is a chemical reaction in which two or more simple substances combine to form a new, more complex substance? 
    • A. 

      Conservation of mass

    • B. 

      Synthesis

    • C. 

      Endothermic reaction

    • D. 

      Exothermic reaction

  • 5. 
    What is a number placed in front of a chemical formula in an equation that indicates how many atoms or molecules of each reactant and product are involved in a reaction? What is the 2 in the formual?                           2 CuO + C   
    • A. 

      Product

    • B. 

      Subscript

    • C. 

      Reactant

    • D. 

      Coefficient

  • 6. 
    What is the principle stating that matter is not created or desrtroyed during a chemical reaction?
    • A. 

      Synthesis

    • B. 

      Chemical equation

    • C. 

      Combustion

    • D. 

      Conservation of mass

  • 7. 
    What is a biological catalyst that lowers the activation energy of reactions in cells?
    • A. 

      Enzyme

    • B. 

      Catalyst

    • C. 

      Fuel

    • D. 

      Subscript

  • 8. 
    What is a material that increases the rate of a reaction by lowering the activation energy?
    • A. 

      Inhibitor

    • B. 

      Catalyst

    • C. 

      Decomposition

    • D. 

      Enzyme

  • 9. 
    What is a material that decreases the rate of a reaction?
    • A. 

      Inhibitor

    • B. 

      Fuel

    • C. 

      Catalyst

    • D. 

      Precipitate

  • 10. 
    What is the amount  of energy dissolved in a given amount of another material?
    • A. 

      Concentration

    • B. 

      Coefficient

    • C. 

      Replacement reaction

    • D. 

      Inhibitor

  • 11. 
    What is a rapid reaction between oxygen and fuel that produces thermal energy?
    • A. 

      Concentration

    • B. 

      Combustion

    • C. 

      Enzyme

    • D. 

      Fuel

  • 12. 
    What is the material that releases  energy when it burns?
    • A. 

      Chemical equation

    • B. 

      Exothermic reaction

    • C. 

      Fuel

    • D. 

      Endothermic reaction

  • 13. 
    What is the minimum amount of energy needed to start a chemical reaction?
    • A. 

      Coefficient

    • B. 

      Reactant

    • C. 

      Activation energy

    • D. 

      Product

  • 14. 
    What is a reaction that absorbs energy in the form of heat?
    • A. 

      Activation energy

    • B. 

      Replacement reaction

    • C. 

      Exothermic reaction

    • D. 

      Endothermic reaction

  • 15. 
    What is the reaction that releases energy in the form of heat?
    • A. 

      Exothermic reaction

    • B. 

      Endothermic reaction

    • C. 

      Fuel

    • D. 

      Combustion

  • 16. 
    What is the minimum amount of energy needed to start a chemical reaction?
    • A. 

      Activation energy

    • B. 

      Cata;yst

    • C. 

      Inhibitor

    • D. 

      Fuel

  • 17. 
    What is a short, easy way to show a chemical reaction, using symbols instead of words?
    • A. 

      Products

    • B. 

      Chemical equation

    • C. 

      Subscript

    • D. 

      Coefficient

  • 18. 
    What is a number in a chemical formula that tells the number of atoms in a molecule or the ratio of elements in a compound? What is the number 4?          Example: Mg + CuSO4
    • A. 

      Coefficient

    • B. 

      Subscript

    • C. 

      Catalyst

    • D. 

      Inhibitor

  • 19. 
                                                                                                                                                                                                                                                                                                                                                                                 endothermic reaction picturesWhat is a subtance that enters into a chemical reaction?
    • A. 

      Concentration

    • B. 

      Fuel

    • C. 

      Catalyst

    • D. 

      Reactant