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- 1. Multiple Choice
In a Galvanic Cell, the anode is...
positive
negative
- 2. Multiple Choice
In a Galvanic Cell, the cathode is...
positive
negative
- 3. Multiple Choice
Oxidation occurs at the...
anode
cathode
- 4. Multiple Choice
Reduction occurs at the...
anode
cathode
- 5. Multiple Choice
Ecell =
Ered - Eox
Ered + Eox
Eox - Ered
Eox + Ered
- 6. Multiple Choice
In a Galvanic cell, the electrons flow from the...
anode to the cathode
cathode to the anode
- 7. Multiple Choice
In a Galvanic Cell, the salt bridge...
completes the circuit so that electrons can flow through the wire
maintains charge balance
is soaked in an unreactive electrolyte such as KNO3
all of the above
- 8. Multiple Choice
In the above Galvanic Cell, which half cell is undergoing reduction?
Cu | Cu2+
Zn | Zn2+
- 9. Multiple Choice
If an electrochemical reaction is spontaneous, what will Ecell be?
positive
negative
- 10. Multiple Choice
Consider the galvanic cell reaction Zn (s) + Cu2+ (aq) → Cu (s) + Zn2+ (aq) When the cell is running spontaneously, which is the only true statement?
The copper electrode loses mass and the zinc electrode is the cathode.
The copper electrode gains mass and the copper electrode is the cathode.
The zinc electrode gains mass and the zinc electrode is the anode.
The zinc electrode loses mass and the zinc electrode is the cathode.
- 11. Multiple Choice
A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg
Which is the half-reaction occurring at the anode?
HgO + 2 e- → Hg + O2-
Zn2+ + 2 e- → Zn
Zn → Zn2+ + 2 e-
ZnO + 2 e- → Zn
- 12. Multiple Choice
A certain galvanic cell has for its spontaneous cell reaction: Zn + HgO → ZnO + Hg
Which is the half-reaction occurring at the cathode?
HgO + 2 e- → Hg + O2-
Hg → Hg2+ + 2 e-
Zn → Zn2+ + 2 e-
ZnO + 2 e- → Zn
- 13. Multiple Choice
In a redox reaction, the oxidising agent... (choose two options)
is oxidised
is reduced
increases its oxidation number
decreases its oxidation number
- 14. Multiple ChoiceA galvanic cell was set up using the Cu2+/Cu and Fe3+/Fe half-cells. The standard redox potentials for these half-cells are:
Cu2+(aq) + 2e- → Cu(s); E0 = 0.34 V
Fe3+(aq) + e- → Fe2+(aq); E0 = 0.77 V
The oxidant and reductant reacting in this galvanic cell are, respectively:Fe3+; CuFe2+; CuCu2+; Fe3+Cu2+; Fe2+ - 15. Multiple ChoiceA galvanic cell was set up from a Cl2/Cl- half-cell and a standard hydrogen electrode (SHE). It was found that the voltmeter reading was 1.36 V and the chlorine half-cell was the positively-charged electrode. Which statement about this galvanic cell is INCORRECT?Both of the electrodes should be made of platinum.The chlorine half-cell is the anode.As the cell operates, the pH of the solution in the SHE decreases.The standard redox potential for the chlorine half-cell must be +1.36 V.
- 16. Multiple ChoiceA galvanic cell was set up using the Pb4+/Pb2+ and Pb2+/Pb half-cells. The standard redox potentials for these half-cells are:
Pb4+(aq) + 2e- → Pb2+(aq); E0 = 1.69 V
Pb2+(aq) + e- → Pb(s); E0 = -0.13 V
What metal should be used for the electrode for the Pb4+/Pb2+ half-cell and what would be the potential difference across the cell?Lead; 1.56 VLead; 1.82 VPlatinum; 1.56 VPlatinum; 1.82 V - 17. Multiple ChoiceCalculate the cell potential of voltaic cell–1.51- 0.03+0.03+1.51
- 18. Multiple ChoiceVoltaic cell is made by connecting two half-cells below. Which statement is correct?Mn is oxidized and voltage is 1.06 VPb is oxidized and voltage is 1.06 VMn is oxidized and voltage is 1.32 VPb is oxidized and voltage is 1.32 V
- 19. Multiple Choice
As an element is oxidized, its oxidation number
decreases as electrons are lost
increases as electrons are lost
decreases as electrons are gained
increases as electrons are gained
- 20. Multiple ChoiceWhat reaction occurs at the anode?Ag+ + e- →AgAg → Ag+ + e-Ni2+ + 2e- → NiNi → Ni2+ + 2e-
- 21. Multiple ChoiceReduction happens at theanodecathodesalt bridgevoltmeter
- 22. Multiple ChoiceThis electrode loses massanodecathode
- Answer choicesTagsAnswer choicesTags