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Study Quiz 2
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1
Which of the following statements does not explain how electrolytic cells are different from galvanic cells?
A)Electrolytic cells convert electrical energy to chemical energy.
B)Electrolytic cells require energy and are not spontaneous.
C)Electrolytic cells have a negative cell potential value.
D)Electrolytic cells include electrodes and at least one electrolyte.
2
Where do reduction half-reactions occur?
A)at the anode in an electrolytic cell
B)at the cathode in electrolytic cells and galvanic cells
C)at the anode in a galvanic cell
D)at the anode in electrolytic cells and galvanic cells
3
What reaction occurs at the anode in the electrolysis of water?

A)2H2O(l)à O2(g) + 4H+(aq) + 4e-

B)2H2O(l) + 2e-à H2(g) + 2OH-(aq)

C)2H2O(l)à 2 H2(g) + O2(g)

D)2H2O(l) + 2e-à 2 H2(g) + O2(g)
4
Which of the following half-reactions is not feasible as part of the process for the electrolysis of LiBr(aq)?

A)Br2(l) + 2e-à 2Br-(aq)

B)O2(g) + 4H+(aq) + 4e-à 2H2O(l)

C)2H2O(l) +2e-à H2(g) + 2OH-(aq)

D)Li(aq)à Li(s)
5
Which statement is not true about rechargeable batteries?
A)The half-reaction and the overall cell reaction are both reversed when the batteries are recharged.
B)They are better for the environment than non-rechargeable batteries.
C)They wear out.
D)They last forever because they are perfectly reversible.
6
What is required to measure the electric charge flowing through a circuit?
A)measurement of current, time and moles
B)Measurement of time and moles
C)measurement of current and time
D)measurement of electric current flowing through the circuit
7
What does Faraday's law state about the amount of a substance produced or consumed in an electrolysis reaction?
A)It is directly proportional to the quantity of electricity that flows through the circuit.
B)It is inversely proportional to the quantity of electricity that flows through the circuit.
C)It is directly proportional to the amount of reactants in the reaction.
D)It is directly proportional to the concentration of ions at the anode.
8
Which of the following uses electrolysis?
A)galvanic cells
B)extraction of metals from their molten chlorides
C)disposable alkaline batteries
D)the Daniell Cell





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