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- 1. Multiple ChoiceWhat is the product formed at the cathode during the electrolysis of molten magnesium fluoride?magnesiumhydrogenfluorineoxygen
- 2. Multiple ChoiceExplain why the electrolyte has to be a liquid.So the ions can moveSo the electrons can moveSo that it doesn't get too hotSo the fish are ok
- 3. Multiple ChoiceWhat does the Cathode (-) do to ions?Give electrons to the Positive ions to turn them back into atomsTake electrons from the positive ions?Turn ions back into atoms by removing electronsTurn atoms into ions by adding electrons
- 4. Multiple ChoiceDescribe oxidation in terms of electronsoxidation is gain of electronsoxidation is loss of electrons
- 5. Multiple ChoiceDescribe reduction in terms of electronsreduction is gain of electronsreduction is loss of electrons
- 6. Multiple ChoiceWhy can ionic compounds not conduct electricity when they are solid?their electrons are not free to movetheir ions are free to movetheir ions are not free to movetheir electrons are free to move
- 7. Multiple ChoiceWhat type of charge does a metal ion have?+-
- 8. Multiple ChoiceThe electrode connected to the positive terminal of a battery is __________.cathodeanode
- 9. Multiple ChoiceThe negatively charged ions migrate toward the ________.anodecathode
- 10. Multiple ChoiceWhich statement correctly describes the 2 electrodes?The anode is negative and the cathode is positiveThe anode and cathode are both positiveThe anode is positive and the cathode is negativeThe anode and cathode are both negative.
- 11. Multiple ChoicePositive ions (cations) will move towards the cathode (-) where they will discharge by....Breaking apartLosing electronsClumping together.Gaining electrons
- 12. Multiple Choice
What is the equation to show what happens to chloride ions at the anode.
Cl- --> Cl + e-
2Cl- --> Cl2 + 2e-
Cl2 + 2e- 2Cl-
Cl2 + 2e- --> 2Cl-
- 13. Multiple Choice
Choose the half-equation that shows the discharge of aluminium ion.
Al3+ - 3e- --> Al
Al2+ + 3e- --> Al
Al3+ + 3e- --> Al
Al3+ --> Al + 3e-
- 14. Multiple Choice
Why ionic compounds can not conduct electricity when they are solid?
their electrons are not free to move
their ions are free to move
their ions are not free to move
their electrons are free to move
- 15. Multiple Choice
What are the ions present in molten Al2O3?
Al2+ and O3-
Al2- and O3+
Al3+ and O2-
Al3- and O2+
- 16. Multiple Choice
Oxidation is loss of electron. Where does oxidation take place during electrolysis.
At anode
In the solution
At cathode
In the circuit
- 17. Multiple Choice
Electrolysis is .....conduction of electricity by the ionic compound in solid stateconduction of electricity by ionic compound in molten and aqueous state - 18. Multiple ChoiceWhat is electrolysis?breaking down of a compound using a currentmaking a compound using a current
- 19. Multiple ChoiceWhich statement correctly describes the 2 electrodes?The anode is negative and the cathode is positiveThe anode and cathode are both positiveThe anode is positive and the cathode is negativeThe anode and cathode are both negative.
- 20. Multiple ChoiceWhat happens at the positive electrode?Positive non-metal ions are attractedPositive metal ions are attractedNegative non-metal ions are attractedNegative metal ions are attracted
- 21. Multiple ChoiceExplain why the electrolyte has to be a liquid
So the ions can move
So the electrons can moveSo that it doesn't get too hotSo the fish are ok - 22. Multiple ChoiceWhat happens to the metal ions during electrolysis?NothingReduction; they gain electronsOxidation; they gain electronsReduction; they lose electrons
- 23. Multiple ChoiceWhy can ionic compounds not conduct electricity when they are solid?their electrons are not free to movetheir ions are free to movetheir ions are not free to movetheir electrons are free to move
- 24. Multiple ChoiceDescribe oxidation in terms of electronsoxidation is gain of electronsoxidation is loss of electrons
- 25. Multiple ChoiceWhat would the charges be on the ions that make up NaCl?Na+ and Cl-Na- and Cl+Na+ and Cl-
- 26. Multiple ChoiceWhat element is used to make up the electrodes?oxygenironcarbonmagnesium
- 27. Multiple ChoiceFinish the statement...."Opposites..."repelattractdo nothing
- 28. Multiple ChoiceWhen NaCl solution is electrolysed what has forms at the anode?HydrogenOxygenChlorineSodium
- 29. Multiple ChoiceThe diagram shows the electrolysis of lead(II) bromide using inert electrodes. Why does the bulb only light up when the lead(II) bromide is melted?Bromine atoms in lead(II) bromide are converted to ions when it is meltedElectrons flow through the lead(II) bromide when it is meltedThe ions in lead(II) bromide are acting as the mobile charge carriers when it is meltedThere are no ions in solid lead(II) bromide
- 30. Multiple ChoiceReduction occurs at theanodecathode
- 31. Multiple ChoiceWhat kind of Electrical Current does Electroysis require?DirectIndirectAnternativeA alternating
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