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- 1. 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.
- 2. Multiple Choice
___________ electrode is an inert electrode.
Copper
Iron
Carbon
Zinc
- 3. Multiple Choice
Ionic compounds do not conduct electricity when they are solid because,
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
- 4. Multiple ChoicePositive ions (cations) will move towards the cathode (-) where they will discharge by....Breaking apartLosing electronsClumping together.Gaining electrons
- 5. Multiple Choice
Which equation shows what happen to chloride ions at the anode.
Cl- --> Cl + e-
2Cl- --> Cl2 + 2e-
Cl2 - -> 2e- + 2Cl-
Cl2 + 2e- --> 2Cl-
- 6. 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-
- 7. Multiple ChoiceIn an aqueous solution of copper chloride, which ions are attracted to the negative electrode?Cu2+ and Cl- and H+ and OH-Cu2+ and H+Cl- and OH-Cu2+
- 8. Multiple Choice
In electrolysis of concentrated HCl, what is the product formed at anode?
Hydrogen
Oxygen
Chlorine
Hydroxide ion
- 9. Multiple Choice
Oxidation is loss of electron. Where does oxidation take place during electrolysis.
At anode
In the electrolyte
At the circuit
At cathode
- 10. Multiple Choice
What change is observed at cathode during electrolysis of aqueous copper(II) chloride using carbon electrode
Silvery deposit
pink solid deposit
bubbles of green gas
colourless gas
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