T11.1 Oxidation and Reduction Review
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Oxidation and Reduction Review 1
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Question 1 of 6
1. Question
Category: 11. Oxidation and ReductionWhich energy conversion occurs during the operation of an electrolytic cell?
Correct
An electrolytic cell is a type of electrochemical cell in which an external source of electrical energy is converted to the chemical energy needed to dive a reduction-oxidation reaction that is not spontaneous.
Incorrect
An electrolytic cell is a type of electrochemical cell in which an external source of electrical energy is converted to the chemical energy needed to dive a reduction-oxidation reaction that is not spontaneous.
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Question 2 of 6
2. Question
Category: 11. Oxidation and ReductionWhich balanced equation represents a redox reaction?
Correct
In a redox reaction, electrons are transferred between reacting particles and the oxidation numbers of the particles change.
The easiest way to identify redox reactions is to identify a free element in an equation.
Incorrect
In a redox reaction, electrons are transferred between reacting particles and the oxidation numbers of the particles change.
The easiest way to identify redox reactions is to identify a free element in an equation.
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Question 3 of 6
3. Question
Category: 11. Oxidation and ReductionWhich statement describes one characteristic of an operating electrolytic cell?
Correct
Electrolytic cells are electrochemical cells that use an external source of electrical energy in order to drive a nonspontaneous reduction-oxidation reaction.
Incorrect
Electrolytic cells are electrochemical cells that use an external source of electrical energy in order to drive a nonspontaneous reduction-oxidation reaction.
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Question 4 of 6
4. Question
Category: 11. Oxidation and ReductionWhich half-reaction equation represents the reduction of an iron (II) ion?
Correct
In a reduction half-reaction, electrons are gained and the oxidation number of the reduced substance is lowered. The correct answer choice indicates that 2 electrons are gained and that the oxidation number of Fe is lowered from +2 to 0.
Incorrect
In a reduction half-reaction, electrons are gained and the oxidation number of the reduced substance is lowered. The correct answer choice indicates that 2 electrons are gained and that the oxidation number of Fe is lowered from +2 to 0.
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Question 5 of 6
5. Question
Category: 11. Oxidation and ReductionWhich metal is more active than H2?
Correct
Use Reference Table J. Metals that are more active than Hydrogen lie above hydrogen on the table.
Incorrect
Use Reference Table J. Metals that are more active than Hydrogen lie above hydrogen on the table.
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Question 6 of 6
6. Question
Category: 11. Oxidation and ReductionGiven the balanced ionic equation representing the reaction in an operating voltaic cell.
Zn(s) + Cu2+(aq) → Zn2+(aq) + Cu(s)
The flow of electrons through the external circuit in this cell is from the
Correct
According to the ionic equation, Zn is oxidized to Zn2+ and is the anode; Cu2+ is reduced to Cu and is the cathode. The electrons lost by the Zn electrode pass thought the external circuit and enter the Cu electrode.
Incorrect
According to the ionic equation, Zn is oxidized to Zn2+ and is the anode; Cu2+ is reduced to Cu and is the cathode. The electrons lost by the Zn electrode pass thought the external circuit and enter the Cu electrode.