Redox, Circuits & Fluorescence

28 Questions | Total Attempts: 57

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  • 1. 
    In the Mythbuster's Episode "The Third Rail", why did the dummy leak ballistics gel? This is extra credit.
  • 2. 
    In the Brainicas clip, an electric fence was used to shock people. How were they able to get EVERYONE who was holding hands to feel the shock from the fence? This is Extra credit.
  • 3. 
    In the Mythbusters episode, "The Third Rail", it was proved that urine was conductive but yet the myth was busted. What was the specific issue that was discovered the "problem" with the myth? This is extra credit.
  • 4. 
    Metals readily ____________ electrons to form _______________ charged particles.
    • A. 

      Lose, negatively

    • B. 

      Lose, positively

    • C. 

      Gain, negatively

    • D. 

      Gain, postively

  • 5. 
    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

  • 6. 
    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

  • 7. 
    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

  • 8. 
    In ROYGBIV, red has a wavelength corresponding to
    • A. 

      700 nm

    • B. 

      400 nm

    • C. 

      1000 nm

    • D. 

      200 nm

  • 9. 
    The relationship between wavelength and frequency is __________________ because when wavelength _______________, frequency decreases.
    • A. 

      Direct, increases

    • B. 

      Direct, decreases

    • C. 

      Indirect, increases

    • D. 

      Indirect, decreases

  • 10. 
    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

  • 11. 
    What is the relationship between current and potential difference?
    • A. 

      Direct

    • B. 

      Indirect

    • C. 

      Exponential

    • D. 

      Quadratic

  • 12. 
    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

  • 13. 
    Aqueous sodium (Na) will react with _________ in the solid state.
    • A. 

      Lithium, Li

    • B. 

      Magnesium, Mg

    • C. 

      Tin, Sn

    • D. 

      Mercury, Hg

  • 14. 
    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

  • 15. 
    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

  • 16. 
    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

  • 17. 
    Which metal reacts spontaneoulsy with a solution containing zinc ions?
    • A. 

      Potassium, K

    • B. 

      Nickel, Ni

    • C. 

      Copper, Cu

    • D. 

      Silver, Ag

  • 18. 
    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

  • 19. 
    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

  • 20. 
    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

  • 21. 
    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

  • 22. 
    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

  • 23. 
    Which metallic conductor is the best & most popular choice?
    • A. 

      Aluminum

    • B. 

      Silver

    • C. 

      Copper

    • D. 

      Gold

  • 24. 
    What unit used to measure EMF? 
    • A. 

      Amps

    • B. 

      Volts

    • C. 

      Ohms

    • D. 

      Curies

  • 25. 
    What is used in an electrical circuit to prevent a short circuit? 
    • A. 

      Insulators

    • B. 

      Conductors

    • C. 

      Resistors

    • D. 

      Circuit breakers

  • 26. 
    Which represents an example when resistance is desirable?
    • A. 

      Light bulbs

    • B. 

      Space heaters

    • C. 

      Cell phones

    • D. 

      Computers

  • 27. 
    Which wavelength of light has a higher energy?
    • A. 

      700 nm

    • B. 

      600 nm

    • C. 

      500 nm

    • D. 

      400 nm

  • 28. 
    Which color of visible light has a longer wavelength?
    • A. 

      Orange

    • B. 

      Green

    • C. 

      Indigo

    • D. 

      Violet