Ch5 Chemical Reactions

26 Questions | Total Attempts: 265

SettingsSettingsSettings
Ch5  Chemical Reactions - Quiz

Chapter 5 Unit TestChemical Reactions


Questions and Answers
  • 1. 
    Which of the following does not indicate a chemical change has occurred?  
    • A. 

      Color change

    • B. 

      Formation of a precipitate

    • C. 

      Change in surface are

    • D. 

      Gas production

  • 2. 
    When balancing equation, you are only allowed to change the _________ in the chemical equation.  
    • A. 

      Products

    • B. 

      Reactants

    • C. 

      Coefficients

    • D. 

      Subscripts

  • 3. 
    Which of the following equation is chemically balanced? a.       2H2O  à   H2  + O2 b.      Zn + 2HCl  à ZnCl2  +  H2 c.       C2H5OH  + 2O2  à  3CO2  + 3H2O d.      NaOH  +  2HCl  à  NaCl  +  H2O
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 4. 
    The burning of wood produces loss of heat and is an example of a(n) ________ reaction.  
    • A. 

      Exothermic

    • B. 

      Endothermic

    • C. 

      Nuclear

    • D. 

      Terminal

  • 5. 
    The reaction graph below represents an  ________ reaction.
    • A. 

      Endothermic reaction

    • B. 

      Exothermic reaction

  • 6. 
    In the Potential Energy in a Chemical Reaction graph above, it can be observed that  ________ have more potential energy.  
    • A. 

      The reactants

    • B. 

      The products

    • C. 

      Substance A

    • D. 

      Substance AB

  • 7. 
     When chemical bonds are broken and new substances are created a chemist states ______ has occurred.  
    • A. 

      A nuclear reaction

    • B. 

      A chemical change

    • C. 

      No change has occurred

    • D. 

      Mass destruction

  • 8. 
     Study the chemical equation below.  Identify the chemical products and reactants. Mg  +  HCl  à  MgCl2  +  H2 a.       Reactants = Mg and Cl,   Products = MgCl2  and H2 b.      Reactants = Mg and HCl,   Products = MgCl2  and H2 c.       Reactants = MgCl2  and H2,   Products = Mg  and HCl d.      Reactants = MgCl and H2,   Products = MgCl2  and HCl
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      D

  • 9. 
     In this chemical formula for aluminum Sulfate, 3Al2(SO4)3, how many atoms of each element are indicated by the formula?
    • A. 

      A.4 aluminum, 12 sulfur, and 12 oxygen atoms

    • B. 

      6 aluminum, 9 sulfur, and 36 oxygen atoms

    • C. 

      5 aluminum, 12 sulfur, and 48 oxygen atoms

    • D. 

      6 aluminum, 9 sulfur, and 12 oxygen atoms

  • 10. 
     In the formula for 6 molecules of sodium sulfate, 6Na2SO4, what is the subscript for the sulfur atom?
      • A. 

        6

      • B. 

        2

      • C. 

        1

      • D. 

        4

    1. 11. 
      Which of the following actions would probably speed up the chemical reaction between magnesium and hydrochloric acid?
      • A. 

        Decrease the surface area of magnesium.

      • B. 

        Raise the temperature of the hydrochloric acid.

      • C. 

        Add an inhibitor

      • D. 

        Decrease the mass of the magnesium

    2. 12. 
      Which of the following equation is a synthesis reaction?
        1. 2H2O  à 2H2   +  O2
        2. 2Ca  +  O2   à  2CaO
        3. Mg  +  2HCl   à  MgCl2   +   H2
        4. NaOH  +  HCl   à   NaCl   +   H2O
      • A. 

        A

      • B. 

        B

      • C. 

        C

      • D. 

        D

    3. 13. 
      Which of these equations is a double replacement reaction?
        1. 2H2O  à 2H2   +  O2
        2. 2Ca  +  O2   à  2CaO
        3. Mg  +  2HCl   à  MgCl2   +   H2
        4. 2NaOH  +  MgCl2   à   2NaCl   +   Mg(OH)2
      • A. 

        A

      • B. 

        B

      • C. 

        C

      • D. 

        D

    4. 14. 
      The chemical reaction that is the opposite of a synthesis reaction is the  
      • A. 

        Single Replacement

      • B. 

        Decomposition

      • C. 

        Double Replacement

      • D. 

        Exothermic

    5. 15. 
       A chemist adds more Sulfuric Acid solution to a beaker to speed up the double replacement reaction between Sodium Hydroxide and Sulfuric Acid.  Which of the following factors did the chemist change to speed up the reaction?
      • A. 

        Temperature

      • B. 

        Concentration

      • C. 

        Catalyst

      • D. 

        Surface area

    6. 16. 
      Chemical equation must be balanced to obey the
      1. 17. 
        Which of these equations is NOT balanced?
          1. SO3  à  S  + O2
          2. 2H2O  à  2H2 +  O2
          3. MnO4  à  Mn  +  2O2
          4. 2Cu  +  O2  à  2CuO
      2. 18. 
        Which of the following is a single replacement reaction?
          1. 2H2O  à 2H2   +  O2
          2. 2Ca  +  02   à  2CaO
          3. Mg  +  2HCl   à  MgCl2   +   H2
          4. 2NaOH  +  MgCl2   à   2NaCl   +   Mg(OH)2
      3. 19. 
        In a chemical reaction it is noticed that a precipitate has formed in the test tube.The precipitate is a ____.
      4. 20. 
        What coefficient is needed to replace the "?" that will then balance this chemical equation?2NaOH  +  MgCl2   à     ?   NaCl   +   Mg(OH)2
      5. 21. 
        Which of the following is a decomposition reaction?
        1. 2H2O  à 2H2   +  O2
        2. 2Ca  +  02   à  2CaO
        3. Mg  +  2HCl   à  MgCl2   +   H2
        4. 2NaOH  +  MgCl2   à   2NaCl   +   Mg(OH)2
      6. 22. 
        Which of the following is a double replacement reaction?
        1. 2H2O  à 2H2   +  O2
        2. 2Ca  +  02   à  2CaO
        3. Mg  +  2HCl   à  MgCl2   +   H2
        4. 2NaOH  +  MgCl2   à   2NaCl   +   Mg(OH)2
      7. 23. 
        Which of the compounds in this reaction is a solid?
          2NaOH (aq) +  MgCl2 (aq)  à   2NaCl (aq)  +  Mg(OH)(s)a) NaOHb) NaClc) Mg(OH)2d) MgCl2
      8. 24. 
        The reaction type notated as         A + B -->  ABrepresent a model for a ___________ reaction.
      9. 25. 
        Predict the products for this single replacement reaction:      Mg  +  2HCl   à  ________   +   _______a) MgCl2   +   Hb) MgCl   +   H2c) Cl2   +   H2Mgd) MgH2   +   Cl2e)  MgCl2   +  H2
      10. Related Topics
        Back to Top Back to top