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Eleventh Grade (Grade 11) Oxidation-Reduction Reactions Questions

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Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction

[math]H_2C_2O_4 (aq) + MnO_4^(-) (aq) rarr CO_2(g) + Mn^(2+) (aq) [/math]

What is the reduction half reaction for this redox reaction?
  1. [math](Mn)^(7+) (aq) rarr Mn^(2+) (aq) [/math]
  2. [math]H_2C_2O_4 (aq) rarr CO_2(g)[/math]
  3. [math](MnO_4)^(-) (aq) + 8H^(+) (aq) rarr Mn^(2+) (aq) + 4H_2O (l)[/math]
  4. [math]H_2C_2O_4 (aq) rarr 2CO_2 (g) + 2H^(+) (aq)[/math]
Grade 11 Oxidation-Reduction Reactions
Identify the reducing agent in the following reaction:

[math]I_2(aq) + 2S_2O_3^(2-) (aq) rarr S_4O_6^(2-) (aq) + 2I^(-) (aq)[/math]
  1. [math](S_2O_3)^(2-)[/math]
  2. [math]I_2[/math]
  3. [math](S_4O_6)^(2-)[/math]
  4. [math]I^(-)[/math]
Grade 11 Oxidation-Reduction Reactions
Which of the following chemical equations represents a redox reaction?
  1. [math]CH_3COOH + NaOH -> CH_3COONa + H_2O[/math]
  2. [math]Cl^(-) + Ag^(+) ->AgCl darr[/math][math][/math]
  3. [math]5Fe^(2+) + MnO_4^(1-) + 8H_3O^+ rArr6Fe^(3+) + Mn^(2+) + 12H_2O[/math]
  4. [math]HCl + NaOH -> NaCl + H_2O[/math]
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction:

[math]CH_4 (g) + O_2(g) rarr CO_2(g) + 2H_2O (l)[/math]

What is the change in the oxidation number of carbon in this reaction?
  1. It increases from -4 to +4
  2. It decreases from +4 to 0
  3. It increases from +4 to -3
  4. It decreases from +4 to -2
Grade 11 Oxidation-Reduction Reactions
What is the sum of the oxidation states in an ionic compound?
  1. It equals the charge of the cation
  2. It equals the charge of the anion
  3. It is equivalent to the magnitude of the ion with the higher charge
  4. It equals zero
Grade 11 Oxidation-Reduction Reactions
What is one characteristic feature of an oxidizing agent?
  1. It undergoes reduction
  2. Causes reduction
  3. Donates electron
  4. It itself undergoes oxidation
Grade 11 Oxidation-Reduction Reactions
Identify the oxidant in the following reaction:

[math]C_4H_4O_6^(2-) (aq) + ClO_3^(-) (aq) rarr CO_3^(2-) (aq) + Cl^(-) (aq) [/math]
  1. [math](ClO_3)^(-)[/math]
  2. [math](C_6H_4O_6)^(2-)[/math]
  3. [math](CO_3)^(2-)[/math]
  4. [math]Cl^(_)[/math]
Grade 11 Oxidation-Reduction Reactions
Identify the oxidant in the following reaction:
[math]3H_3AsO_3(aq) + BrO_3^(-) (aq) rarr Br^(-) (aq) + 3H_3AsO_4(aq)[/math]
  1. [math]BrO_3^(-) (aq)[/math]
  2. [math]H_3AsO_3[/math]
  3. [math]Br^(_) (aq)[/math]
  4. [math]H_3AsO_4[/math]
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of Xe, and what does it suggest?
  1. Its oxidation number is 8, making it inert
  2. Its oxidation number is 0, making it nonreactive
  3. Its oxidation number is 7, making it reactive
  4. Its oxidation number is 0, making it reactive
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
Grade 11 Oxidation-Reduction Reactions
Which of the following half-reactions involves oxidation?
  1. Fe in [math]Fe(OH)_2 rarr Fe(OH)_3[/math]
  2. V in [math]VO^(2+) (aq) rarr V^(3+) (aq) [/math]
  3. Cl in [math]OCl^(-) (aq) rarr Cl^(-) (aq) [/math]
Grade 11 Oxidation-Reduction Reactions
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