Quiz
Balancing Redox Reaction
8 days ago by
guru_navela
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  • Question 1
    60 seconds
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    Q.      In the reaction Zn + H2O --> ZnO2 + H2
     which element, if any, is oxidized? 
    answer choices
    Zinc
    Hydrogen
    Oxygen
    None
  • Question 2
    30 seconds
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    Q. What substance is oxidized in the following reaction?
    4Fe + 3O2 --> 2Fe2O3
    answer choices
    Iron
    Fluorine
    Oxygen
  • Question 3
    120 seconds
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    Q. If in a reaction, copper is reduced; its number of electrons has:
    answer choices
    Increased
    Decreased
    Remained Constant
    Varies Randomly
  • Question 4
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    Q. If an atom loses electrons during a chemical reaction, the atom was:
    answer choices
    Oxidized
    Reduced
    Neutralized
    Precipitated
  • Question 5
    900 seconds
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    Q.

    What element is being Reduced?

    answer choices

    N

    H

    O

    S

  • Question 6
    60 seconds
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    Q. What is oxidation number of Cr in Cr2O72-?
    answer choices
    -2
    +2
    +6
    +12
  • Question 7
    60 seconds
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    Q. What is oxidation number of O in O2 ?
    answer choices
    0
    -2
    +1
    +2
  • Question 8
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    Q.

    WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:


    Balance the following ACIDIC reactions using changing oxidation number method.

    MnO4(aq) + H+(aq) + I (aq) → Mn2+(aq) + I2(s)


    Water is a product of this reaction. What is the coefficient of water in the final balanced equation?

    answer choices

    8

    5

    2

    16

  • Question 9
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    Q.

    WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:


    Balance the following reactions using changing oxidation number method.

    MnO4(aq) + H+(aq) + I (aq) → Mn2+(aq) + I2(s)

    How many electrons water compound produced in the reaction?

    answer choices

    10

    9

    8

    7

  • Question 10
    30 seconds
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    Q.

    WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:


    Consider the following REDOX reaction:

    Cl2(g) → ClO(aq) + Cl(aq) (basic solution)

    How many OH- molecules did you add to the reactant side of this reaction when balancing?

    answer choices

    1

    2

    3

    4

  • Question 11
    30 seconds
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    Q.

    WRITE THIS OUT ON PAPER, YOU MAY USE THE ANSWER TO THIS PROBLEM AGAIN IN ANOTHER QUESTION:

    Consider the following REDOX reaction:

    Cl2(g) → ClO(aq) + Cl(aq) (basic solution)

    Which species is the result of oxidation?

    answer choices

    Cl

    ClO

  • Question 12
    900 seconds
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    Q.

    What element is being Oxidized?

    answer choices

    N

    H

    O

    S

  • Question 13
    900 seconds
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    Q.

    What element is being Reduced?

    answer choices

    N

    H

    O

    S

  • Question 14
    900 seconds
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    Q.

    What are the coefficients when the equation is balanced?

    answer choices

    2 + 3 --> 2 + 3 + 4

    1 + 3 --> 1 + 3 + 2

    2 + 4 --> 2 + 3 + 2

    1 + 1 --> 1 + 1 + 1

  • Question 15
    900 seconds
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    Q.

    What element is being Oxidized?

    answer choices

    I

    H

    S

    O

  • Question 16
    900 seconds
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    Q.

    What are the coefficients when the equation is balanced?

    answer choices

    1 + 1 + 1 --> 2 + 1 + 3

    2 + 2 + 2 --> 4 + 2 + 3

    1 + 2 + 1 --> 2 + 2 + 3

    1 + 1 + 1 --> 1 + 1 + 1

  • Question 17
    900 seconds
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    Q.

    What element is being reduced?

    answer choices

    I

    H

    H

    S

    S

    O

    O

  • Question 18
    60 seconds
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    Q. What is oxidation number of Cr in Cr2O72-?
    answer choices
    -2
    +2
    +6
    +12
  • Question 19
    60 seconds
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    Q. What is oxidation number of H in CaH2?
    answer choices
    +1
    -1
    0
    +2
  • Question 20
    60 seconds
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    Q. What is the oxidation number of N in NO2-1?
    answer choices
    -3
    +4
    -2
    +3
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