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Eleventh Grade (Grade 11) Oxidation-Reduction Reactions Questions

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Grade 11 Oxidation-Reduction Reactions
A chemical reaction that involves the gaining of electrons by one of the atoms involved in the reaction between two chemicals.
  1. Oxidation
  2. Reduction
  3. Photosynthesis
  4. Chemosynthesis
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of iron in iron (II) oxide?
  1. +2
  2. +3
  3. -2
  4. -3
Grade 11 Oxidation-Reduction Reactions
A chemical reaction that occurs in an atom or compound and results in the loss of one or more electrons.
  1. Freezing point
  2. Reduction
  3. Oxidation
  4. Reactant
Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction:

H2C2O4(aq)+MnO-4(aq)→CO2(g)+Mn2+(aq)

What is the reduction half reaction for this redox reaction?
  1. (Mn)7+(aq)→Mn2+(aq)
  2. H2C2O4(aq)→CO2(g)
  3. (MnO4)-(aq)+8H+(aq)→Mn2+(aq)+4H2O(l)
  4. H2C2O4(aq)→2CO2(g)+2H+(aq)
Grade 11 Oxidation-Reduction Reactions
Which chemical equation shows a redox reaction?
  1. CH3COOH+NaOH→CH3COONa+H2O
  2. Cl-+Ag+→AgCl↓
  3. 5Fe2++MnO1-4+8H3O+⇒6Fe3++Mn2++12H2O
  4. HCl+NaOH→NaCl+H2O
Grade 11 Oxidation-Reduction Reactions
What represents the total oxidation state for 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 would the oxidation number of a xenon atom be, and what would this oxidation number 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
What is the oxidation number of chlorine in KClO4?
  1. +5
  2. +7
  3. -8
  4. +1
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of chromium in calcium chromate?
  1. +2
  2. -2
  3. -8
  4. +6
Grade 11 Oxidation-Reduction Reactions
What is the oxidation state of the ammonium ion present in NH4Cl?
  1. +5
  2. +1
  3. -1
  4. -4
Grade 11 Oxidation-Reduction Reactions
Consider the following redox reaction:

CH4(g)+O2(g)→CO2(g)+2H2O(l)

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
The oxidation number of carbon in NaCN is 2+.
  1. True
  2. False
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of V in (V2O7)4-?
  1. +5
  2. +3
  3. +2
  4. +1
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of hydrogen in a molecule of hydrogen?
  1. -1
  2. +1
  3. 0
  4. +2
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of carbon in potassium oxalate?
  1. +3
  2. -1
  3. -2
  4. +2
Grade 11 Oxidation-Reduction Reactions
What oxidation states could possibly exist for iron in a compound?
  1. +3, +2
  2. +3, +1
  3. +3, +5
  4. +3, +4
Grade 11 Oxidation-Reduction Reactions
What is the oxidation number of hydrogen in one molecule of water?
  1. +2
  2. -2
  3. +1
  4. 0
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