Chapter Test 5 - Chemical Bonds (30questions)

26 Questions | Total Attempts: 263

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Chapter Test 5 - Chemical Bonds (30questions)

The following questions and clipart are being used for educational purposes.   The test will correlate with VA SOLs PS. 2f; P4c; PS. 5a,c; PS. 6a,b,c. *Reference for questions: Prentice Hall Science Explorer, 2004Reference Clipart question 1-Hydrogen Peroxide: Ref. For educational purpose only: https://www. Snopes. Com/medical/homecure/peroxide. Asp Reference: Clipart, question 3, H2O: Free Gifs and Animation, https://www. Fg-a. Com Reference: Cartoons, questions3, 4      https://www. Usoe. K12. Ut. Us/curr/science/sciber00/8th/matter/sciber/chem type. Htm                                                       


Questions and Answers
  • 1. 
    What type of reaction occurs when a bottle of hydrogen peroxide eventually turns into a bottle of water and oxygen?   It breaks down!                                       * H2O2 is the formula for hydrogen peroxide.       (Remember the 2's should be smaller, a subscript, which drops below          the symbols).                                       
    • A. 

      Precipitate reaction

    • B. 

      Synthesis reaction

    • C. 

      Decomposition reaction

    • D. 

      Replacement reaction

  • 2. 
    What type of  chemical reaction is between copper oxide and carbon that produces copper and carbon dioxide:                                  (CuO + C    yields     Cu + CO2)*Look carefully at the location of  oxygen (0) on both sides of the chemical equation.  Study the cartoon below to get a clearer concept of what takes place in this chemical reaction:                   Notice, the guy in the orange shirt steals the date of the other guy. So, a part of one of the reactants trades places and is in a different place among the products. The girl is now dancing with the guy in the orange shirt, being swung up in the air.                         
    • A. 

      Replacement

    • B. 

      Synthesis

    • C. 

      Decompostion

    • D. 

      Precipitation

  • 3. 
    What is the process, for example A + B = AB, called when two or more substances combine to make a more complex compound?                                                                                                                                                                                                                                    In the cartoon, the skinny bird (reactant) and                 H2 + O   =   H2Othe worm (reactant) combine to make one product, a fat bird.                                                                                               (Water is also called dihydration monoxide)                                                                                                                                                                                                                                       
    • A. 

      Decomposition reaction

    • B. 

      Replacement reaction

    • C. 

      Precipitate reaction

    • D. 

      Synthesis reaction

  • 4. 
    What are the chemicals that act as biological catalysts by speeding up reactions in living things?
    • A. 

      Reactants

    • B. 

      Fuels

    • C. 

      Inhibitor

    • D. 

      Enzymes

  • 5. 
    Which of these is NOT one of the three things necessary to start and maintain a fire?                                    
    • A. 

      Carbon dioxide

    • B. 

      Oxygen

    • C. 

      Fuel

    • D. 

      Heat

  • 6. 
      What is the minimum amount of energy that has to be added to start a reaction?  
    • A. 

      Exothermic energy

    • B. 

      Number of particles

    • C. 

      Activation energy

    • D. 

      Energy

  • 7. 
    All of the folowing answers are evidence of a chemical change, but what is sure evidence of a chemical reaction?
    • A. 

      A color change as in leaves

    • B. 

      The production of a new material as ash from a burnt log

    • C. 

      Changes in properties

    • D. 

      The formation of a gas

  • 8. 
    A reaction that absorbs energy in the form of heat is described as
    • A. 

      Exothermic reaction

    • B. 

      Endothermic reaction

    • C. 

      Combustion

    • D. 

      Unbalanced

  • 9. 
    In a chemical reaction
    • A. 

      There is "no change" in energy

    • B. 

      Energy is "always absorbed"

    • C. 

      Energy is "always released"

    • D. 

      Energy is "either absorbed or released"

  • 10. 
    Which process changes matter into one or more new substances?      
    • A. 

      Physical change

    • B. 

      Chemical change

    • C. 

      Conservation

    • D. 

      Freezing

  • 11. 
    Water vapor in the air turns to liquid water in the form of rain.  This is an example of a      
    • A. 

      Chemical formula

    • B. 

      Chemical equation

    • C. 

      Chemical change

    • D. 

      Physical change

  • 12. 
    Every chemical reaction involves a change in
    • A. 

      Mass

    • B. 

      Energy

    • C. 

      Concentration

    • D. 

      State

  • 13. 
    What happens when chemical bonds break and new bonds form?
    • A. 

      A physical change

    • B. 

      A chemical change

    • C. 

      Matter is destroyed

    • D. 

      Surface area increases

  • 14. 
    A solid that forms from solution during a chemical reaction is called a
    • A. 

      Bond

    • B. 

      Reactant

    • C. 

      Chemical

    • D. 

      Precipitate

  • 15. 
    A shorter, easier way to show chemical reactions using symbols instead words, is called a
    • A. 

      Chemical formula

    • B. 

      Chemical equation

    • C. 

      Symbol

    • D. 

      Subscript

  • 16. 
    Symbols of elements are used to write the formula of compounds much like
    • A. 

      Numbers used to write coefficients

    • B. 

      Products are used to make reactants

    • C. 

      Letters are used to write words

    • D. 

      Numbers are used to balance equations

  • 17. 
    What type of energy releases heat?
    • A. 

      Endothermic reaction

    • B. 

      Molecular reaction

    • C. 

      High heat

    • D. 

      Exothermic reaction

  • 18. 
    In chemical reactions, what does the principle of conservation of mass mean?
    • A. 

      Matter is not changed

    • B. 

      The total mass of reactants is greater than the total mass of the products

    • C. 

      The total mass of the reactants is greater than the total mass of products

    • D. 

      Matter is not created or destroyed

  • 19. 
    What is a material used to decrease the rate of a chemical reaction?
    • A. 

      Inhibitor

    • B. 

      Catalyzt

    • C. 

      Enzyme

    • D. 

      Fuel

  • 20. 
    What is the best way to put out a small kitchen fire?
    • A. 

      Blow it out

    • B. 

      Use a garden hose

    • C. 

      Turn off appliances

    • D. 

      Use a home fire extinguisher

  • 21. 
    In what way can a fire be brought under control?
    • A. 

      Add fuel

    • B. 

      Add oxygen

    • C. 

      Remove oxygen

    • D. 

      Remove carbon dioxide

  • 22. 
    What is a rapid reaction between oxygen and a fuel is known as          
    • A. 

      Heat

    • B. 

      Combustion

    • C. 

      Activation

    • D. 

      Decomposition

  • 23. 
    How does water most affect fires?
    • A. 

      Increasing the temperature

    • B. 

      Producing carbon dioxide and removing fuel

    • C. 

      Decreasing activation energy

    • D. 

      Cooling the fire and preventing contact between oxygen and fuel

  • 24. 
    To balance the chemical equation in which hydrogen and oxygen are combined to yield water (H2 +  O2   yields   H2O), one would need to
    • A. 

      Change the coefficient of H2 to 2

    • B. 

      Change only the coefficient of O2 to 2

    • C. 

      Change the coefficient of both H2 and H2O to 2

    • D. 

      Change the coefficient of both O2 and H2O to 2

  • 25. 
    • A. 

      Increasing the concentration

    • B. 

      Increasing the surface area

    • C. 

      Adding a catalyst which increases the rate of reaction, but lowers the activation energy

    • D. 

      Increasing the mass