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- 1. Open Ended
NAME
- 2. Open Ended
MATRIC NUMBER
- 3. Multiple Choice
What is a redox reaction?
A reaction where both reactants get reduced.
A reaction where both reactants get oxidized.
A reaction that involves a transfer of electrons between reactants.
A reaction that involves the combustion of at least one reactant.
- 4. Multiple Choice
What is a galvanic (voltaic) cell?
It is a cell that destroys electrons on one side and creates electrons on the other side.
It is a cell that contains only one metal bar and one aqueous ion solution.
It is a type of battery that generates an electrical current from redox reactions.
It is a type of battery that drives a redox reaction when electricity is applied.
- 5. Multiple Choice
Which of the following is false regarding galvanic cells?
It converts chemical energy into electrical energy
To set up this cell, a salt bridge is used
The reactions taking place are non-spontaneous
The electrolytes taken in the two beakers are different
- 6. Multiple Choice
Given their standard reduction potentials, which of the species is going to be oxidized?
Cu2+/Cu = 0.34V
Zn2+/Zn = -0.76V
Cu
ZnSO4
CuSO4
Zn
- 7. Multiple Choice
In voltaic cells, the salt bridge _______ .
is not necessary in order for the cell to work
allows charge balance to be maintained in the cell
drives free electrons from one half-cell to the other
is tightly plugged with firm agar gel through which ions cannot pass
- 8. Multiple Choice
In the standard notation for a voltaic cell, the double vertical line "||" represents:
a phase boundary
gas electrode
a wire (metal) connection
a salt bridge
- 9. Multiple Choice
In the following reaction
Sn2+ + 2Fe3+ → Sn4+ + 2Fe2+
the oxidizing agent is....
Sn4+
Sn2+
Fe3+
Fe2+
- 10. Multiple Choice
What reaction occurs at the anode?
Ag+/Ag = 0.80V
Ni2+/Ni = -0.25V
Ni2+ + 2e- → Ni
Ag+ + e- →Ag
Ag → Ag+ + e-
Ni → Ni2+ + 2e-
- 11. Multiple Choice
In a redox reaction, the species that loses electrons
is called the cathode
is oxidized
gains mass at the electrode
decreases in oxidation number
- 12. Multiple Choice
An electrolytic cell uses electrical energy to drive
chemical reaction
physical reaction
no reaction
none of above
- 13. Multiple Choice
Galvanic cells convert
mechanical energy in to electrical energy
potential energy in to electrical energy
electrical energy in to chemical energy
chemical energy in to electrical energy
- 14. Multiple Choice
In a Galvanic/Voltaic Cell, the salt bridge...
completes the circuit so that electrons can flow through the wire
maintains electrical neutrality
avoid liquid junction potential
all of the above
- 15. Multiple Choice
The electrolyte has to contain
the metal to be plated
ions of the plating metal
any type of metal
no metal ions
- 16. Multiple Choice
The standard electrode potential of Pb2+/ Pb and Cu2+/ Cu is -0.13V and +0.34 V respectively. What is anode and cathode for the galvanic cell?
Anode: Pb2+, Cathode: Cu
Anode: Pb, Cathode: Cu
Anode: Pb, Cathode: Cu2+
Anode: Pb, Cathode: Cu2+
- 17. Multiple Choice
- 18. Multiple Choice
According to Faraday's first law, the amount of substances produced or consumed at cathode or anode electrode is directly proportional to the
voltage provided
concentration of electrolyte
quantity of electricity passed
temperature of solution
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