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- 1. 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
- 2. 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
- 3. 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
- 4. Multiple Choice
What is an electrolyte?
A solution of ions
An ionic compound
Molten or dissolved ionic compounds
A combination of electrodes
- 5. Multiple Choice
What is the definition of electrolysis?
The process of making two redox half equations.
The process of melting a substance using electricity.
The process of breaking down a substance using electricity.
The process of vaporising bromine at the anode.
- 6. 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.
- 7. Multiple Choice
___________ electrode is an inert electrode.
Copper
Iron
Carbon
Zinc
- 8. Multiple ChoicePositive ions (cations) will move towards the cathode (-) where they will discharge by....Breaking apartLosing electronsClumping together.Gaining electrons
- 9. Multiple ChoiceWhich of these elements is unlikely to be found native?goldplatinumaluminiumsilver
- 10. Multiple ChoiceWhat is the removal of oxygen from a substance called?reductionextractionelectrolysisoxidation
- 11. Multiple ChoiceWhat is the addition of oxygen to a substance called?decompositionreductionoxidationextraction
- 12. Multiple ChoiceWhich series is used to predict the reactions of metals with carbon and other elements?reactionary seriesreaction seriesredox seriesreactivity series
- 13. Multiple ChoiceWhat is the name of the process that uses electricity to separate the elements in a compound?reductionelectrolysisextractionmining
- 14. Multiple ChoiceHow could you extract sodium from molten sodium chloride?reduction by carbonelectrolysisdecompositionoxidation
- 15. Multiple Choice
The electrodes in electrolysis of aluminium are made of
Steel
Anodes
Graphite
Plastic
- 16. Multiple Choice
The 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 melted
Electrons flow through the lead(II) bromide when it is melted
The ions in lead(II) bromide are mobile charge carriers in the molten state.
There are no ions in solid lead(II) bromide
- 17. Multiple Choice
Anions get discharged by ________ electrons at the ___________
gaining, cathode
losing, anode
gaining, anode
losing, cathode
- 18. Multiple Choice
Positive ions (cations) move towards the cathode (-) where they will discharge by....
Breaking apart
Losing electrons
Clumping together.
Gaining electrons
- 19. Multiple ChoiceWhat is the name given to the solution that is being electrolysed?Salt solutionElectric solutionMineral solutionElectrolyte
- 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 ChoiceWhat particle carries the charge in the wire?electronprotonionatom
- 22. Multiple ChoiceWhat particle carries the charge in the electrolyte?electronprotonionatom
- 23. Multiple Choice
The picture shows electrolysis of copper(II) sulphate solution using graphite electrodes. Besides formation of brown solid on the cathode, what other observations can be made?
The mass of graphite anode decreases.
The blue colour solution becomes paler.
Bubbles of gas form at the anode.
The blue colour solution becomes darker.
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