Redox, Circuits & Fluorescence

28 Questions | Attempts: 82

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  • 1. 
    Metals readily ____________ electrons to form _______________ charged particles.
    • A. 

      Lose, negatively

    • B. 

      Lose, positively

    • C. 

      Gain, negatively

    • D. 

      Gain, postively

  • 2. 
    Oxidation is when electrons are _____________. The electrons are written on the right side of the reaction as ______________.
    • A. 

      Lost, reactants

    • B. 

      Lost, products

    • C. 

      Gained, reactants

    • D. 

      Gained, products

  • 3. 
    The ground state is:
    • A. 

      When an ion or atom with an electron moves to a higher than normal energy level

    • B. 

      The lowest energy level of atom or ion

    • C. 

      The distance between successive crests of an electromagnetic wave

    • D. 

      The number of times a point on a wave passes a fixed reference point in a second

  • 4. 
    Fluorsescence is
    • A. 

      When an ion or atom with an electron moves to a higher than normal energy level

    • B. 

      The lowest energy level of atom or ion

    • C. 

      The emisison of light from a substance resulting from the immediate return of an electron to ground state

    • D. 

      The emission of light from a substance resulting from the delayed return of an electron to ground state

  • 5. 
    In ROYGBIV, red has a wavelength corresponding to
    • A. 

      700 nm

    • B. 

      400 nm

    • C. 

      1000 nm

    • D. 

      200 nm

  • 6. 
    The relationship between wavelength and frequency is __________________ because when wavelength _______________, frequency decreases.
    • A. 

      Direct, increases

    • B. 

      Direct, decreases

    • C. 

      Indirect, increases

    • D. 

      Indirect, decreases

  • 7. 
    Why did the orange LED light NOT make the glow-in-the-dark star glow?
    • A. 

      It's wavelength was too small

    • B. 

      Its energy was too small

    • C. 

      The electron moved to an excited state then had a delay in returning to ground state

    • D. 

      The electron moved to an excited state and immediately returned to ground state

  • 8. 
    What is the relationship between current and potential difference?
    • A. 

      Direct

    • B. 

      Indirect

    • C. 

      Exponential

    • D. 

      Quadratic

  • 9. 
    Solid lead (Pb) will react with ___________ if it is in the aqueous state.
    • A. 

      Calcium, Ca

    • B. 

      Zinc, Zn

    • C. 

      Silver, Ag

    • D. 

      Lithium, Li

  • 10. 
    Aqueous sodium (Na) will react with _________ in the solid state.
    • A. 

      Lithium, Li

    • B. 

      Magnesium, Mg

    • C. 

      Tin, Sn

    • D. 

      Mercury, Hg

  • 11. 
    In the reaction: Ag+ (aq)  + Zn(s) --> Ag (s) + Zn2+ (aq) Ag is _____________ meaning it _______________ electrons.
    • A. 

      Oxidized, loses

    • B. 

      Oxidized, gains

    • C. 

      Reduced, loses

    • D. 

      Reduced, gains

  • 12. 
    In the reaction Ag+ (aq)  + Zn(s) --> Ag (s) + Zn2+ (aq) electrons are transferred from ________ to __________.
    • A. 

      Ag, Zn

    • B. 

      Zn, Ag

    • C. 

      Impossible to answer, electrons are not transferred

  • 13. 
    In the reaction: Cr3+ (aq)  +Al(s) -->  Cr (s) + Al3+ (aq) There is a transfer of
    • A. 

      Electrons from Al to Cr3+

    • B. 

      Electrons from Cr3+ to Al

    • C. 

      Protons from Al to Cr3+

    • D. 

      Protons from Cr3+ to Al

  • 14. 
    Which metal reacts spontaneoulsy with a solution containing zinc ions?
    • A. 

      Potassium, K

    • B. 

      Nickel, Ni

    • C. 

      Copper, Cu

    • D. 

      Silver, Ag

  • 15. 
    It is incorrect to say "When aluminum metal and copper ions were mixed the aluminum melted". Because Al is above Cu on the ____________________ it is correct to say they reacted.
    • A. 

      Electromagnetic spectrum

    • B. 

      Periodic table

    • C. 

      Metal activity series

    • D. 

      Electronegativity series

  • 16. 
    In the reaction:  Cu2+ (aq)  +Zn(s) -->   Zn (s) +   Cu2+ (aq) which equation represents the reduction half reaction?
    • A. 

      Zn(s) --> Zn2+ + 2 e

    • B. 

      Zn(s) + 2e --> Zn2+

    • C. 

      Cu2+ (aq) + 2e --> Cu (s)

    • D. 

      Cu2+(aq) --> Cu (s) + 2e

  • 17. 
    In the reaction: Na(s) + Pt+ (aq) -->  Na + (aq) + Pt(s) Na is _________________ meaning it _______________ electrons.
    • A. 

      Oxidized, loses

    • B. 

      Oxidized, gains

    • C. 

      Reduced, loses

    • D. 

      Reduced, gains

  • 18. 
    In order for a substance to be conduct it must have ______________________ that can ______________________.
    • A. 

      Ions, be charged

    • B. 

      Ions, move

    • C. 

      Molecules, move

    • D. 

      Atoms, move

  • 19. 
    The first recorded references to static electricity and lightning were made over 2,500 years ago by
    • A. 

      Thomas Edison

    • B. 

      Dr. William Gilbert

    • C. 

      Einstein

    • D. 

      Greek Philosophers

  • 20. 
    Which metallic conductor is the best & most popular choice?
    • A. 

      Aluminum

    • B. 

      Silver

    • C. 

      Copper

    • D. 

      Gold

  • 21. 
    What unit used to measure EMF? 
    • A. 

      Amps

    • B. 

      Volts

    • C. 

      Ohms

    • D. 

      Curies

  • 22. 
    What is used in an electrical circuit to prevent a short circuit? 
    • A. 

      Insulators

    • B. 

      Conductors

    • C. 

      Resistors

    • D. 

      Circuit breakers

  • 23. 
    Which represents an example when resistance is desirable?
    • A. 

      Light bulbs

    • B. 

      Space heaters

    • C. 

      Cell phones

    • D. 

      Computers

  • 24. 
    Which wavelength of light has a higher energy?
    • A. 

      700 nm

    • B. 

      600 nm

    • C. 

      500 nm

    • D. 

      400 nm

  • 25. 
    Which color of visible light has a longer wavelength?
    • A. 

      Orange

    • B. 

      Green

    • C. 

      Indigo

    • D. 

      Violet

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