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- 1. Multiple Choice
Which direction do the electrons flow in wire X and which metal is oxidized?ABCD - 2. Multiple ChoiceWhich statement is correct when the cell produces electricity?Magnesium atoms lose electronsMass of the iron electrode decreases.Electrons flow from the iron half-cell to the magnesium half-cell.Negative ion flow from magnesium half-cell to iron half-cell
- 3. Multiple ChoiceOxidation happens at theanodecathodesalt bridgevoltmeter
- 4. Multiple Choice
Reactions in galvanic/voltaic cells are
spontaneous, redox reactionsnon-spontaneous, redox reactionsspontaneous, non-redox reactionsnon-spontaneous, non-redox reactions - 5. Multiple ChoiceIn which direction does electricity flow in a voltaic cell (battery)?Electrons flow from the cathode to the anodeElectrons flow from left to rightElectrons flow from anode to cathodeElectrons flow from right to left
- 6. Multiple ChoiceMetal A is more reactive than metal B. Which statement is correct?Electrons flow in the external circuit from A to BPositive ions flow through salt bridge from A to BPositive ions flow in external circuit from B to A.Electrons flow through salt bridge from B to A
- 7. Multiple ChoiceWhat is the function of Y in cell below?
To maintain the excess buildup of charges in the electrolyte
To allow flow of electrons between both cellsTo allow ions to move from one half cell to the other
To connect both half cells - 8. Multiple ChoiceBelow shows a cell diagram for voltaic cell. Which of the following is FALSE?Electrons flow from anode to cathodeOxidation happens in anodeCopper undergo reduction to form copper ionsZinc undergo oxidation to form Zinc ions
- 9. Multiple ChoiceOxidation happens at theanodecathodesalt bridgevoltmeter
- 10. Multiple ChoiceReactions in voltaic cells arespontaneous, redox reactionsnon-spontaneous, redox reactionsspontaneous, non-redox reactionsnon-spontaneous, non-redox reactions
- 11. Multiple ChoiceWhat reaction occurs at the anode?Ag+ + e- →AgAg → Ag+ + e-Ni2+ + 2e- → NiNi → Ni2+ + 2e-
- 12. Multiple Choice
_______ is the reference electrode that can be used as an anode or a cathode depends on the half-cell to with it is coupled.
Standard electrode potential
Standard hydrogen electrode
Standard cell potential
Electrode potential
- 13. Multiple Choice
Three factors affecting the selection of species to be discharged at electrodes except..
Standard reduction potential of the species
Concentration of the species
Nature of electrodes (active or inert)
Mass of the species
- 14. Multiple ChoiceA student decided to silver-plate a locker key using the apparatus shown. In this cell, the key is theanode and is connected to the positive terminal of the power supplyanode and is connected to the negative terminal of the power supplycathode and is connected to the positive terminal of the power supplycathode and is connected to the negative terminal of the power supply
- 15. Multiple Choice
Reactions in electrolytic cells are
spontaneous, redox reactions
non-spontaneous, redox reactions
spontaneous, non-redox reactions
non-spontaneous, non-redox reactions
- 16. Multiple Choice
The method of coating metals by immersing the metals in a liquid and then passing an electric current through the liquid is called ________
Electrolysis
Electroplating
Electropalting
Electroplation
- 17. Multiple Choice
Electroplating is an industrial process where objects are coated by a thin layer of a nonreactive metal by electrolysis. What should be used as the cathode in this process?
Graphite electrode
The electroplating metal
The object to be electroplated
Magnesium ribbon
- 18. Multiple Choice
Which of the following is NOT equal to 1 Faraday?
96500C
1 mole of electron
one second
- 19. Multiple Choice
how much charge is required to reduce 1 mol of Na+ into Na?
2F
3F
2 X 96500 c
96500 c
- 20. Multiple Choice
how much charge is required to reduce 1 mol of Cu+2 into Cu?
1 c
2 c
1F
2F
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