Assigning Oxidation Numbers Quiz

15 Questions | Total Attempts: 427

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Assigning Oxidation Numbers Quiz

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Questions and Answers
  • 1. 
    Any atom in its elemental state (as a pure element) has an oxidation number of +1.
    • A. 

      True

    • B. 

      False

  • 2. 
    Which of the following is not a possible oxidation number?
    • A. 

      2+

    • B. 

      +2

    • C. 

      II

    • D. 

      -2

  • 3. 
    Select all possible oxidation numbers.
    • A. 

      +1

    • B. 

      1+

    • C. 

      +3

    • D. 

      III

    • E. 

      3-

    • F. 

      -3

  • 4. 
    Select all the following molecules that contain elements with an oxidation state of 0?
    • A. 

      Oxygen gas

    • B. 

      Water

    • C. 

      Nitrogen gas

    • D. 

      Magnesium metal

    • E. 

      Hydrochloric acid

  • 5. 
    The oxidation number of oxygen and hydrogen in H2O is 2- and +1.
    • A. 

      True

    • B. 

      False

  • 6. 
    Hydrogen peroxide is an exception because the oxidation state of oxygen in it is _____  .
  • 7. 
    What is the ox. state of nitrogen in nitric acid, HNO3.
    • A. 

      +4

    • B. 

      +2

    • C. 

      +5

    • D. 

      +3

  • 8. 
    What is the ox. state of S in SO3?
    • A. 

      VI

    • B. 

      6+

    • C. 

      6

    • D. 

      -6

  • 9. 
    Which oxidation states are possible for bromine?
    • A. 

      -3

    • B. 

      +5

    • C. 

      -1

    • D. 

      +1

    • E. 

      +2

    • F. 

      +3

    • G. 

      +7

  • 10. 
    Charges are always represented with the sign after the number.
    • A. 

      True

    • B. 

      False

  • 11. 
    What is the ox. state of chromium in the dichromate ion?
    • A. 

      I

    • B. 

      III

    • C. 

      V

    • D. 

      VI

  • 12. 
    What is the oxidation state of oxygen in its elemental state?
    • A. 

      1+

    • B. 

      +1

    • C. 

      0

    • D. 

      I

  • 13. 
    The difference in the oxidation state of manganese in the manganate and permanganate ion is ___ .