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- 1. Multiple Choice
Electrochemistry deals with
electric energy
chemical energy
only a
both a & b
- 2. Multiple Choice
What is a redox reaction?
A reaction where both reactants get reduced.
A reaction where both reactants get oxidized.
A reaction that involves a transfer of electrons between reactants.
A reaction that involves the combustion of at least one reactant.
- 3. Multiple Choice
What is reduction?
It is the gain of electrons.
It is the loss of electrons.
It is the creation of electrons.
It is the destruction of electrons.
- 4. Multiple Choice
What is oxidation?
It is the gain of electrons.
It is the loss of electrons.
It is the creation of electrons.
It is the destruction of electrons.
- 5. Multiple Choice
What is a reducing agent?
It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that destroys electrons.
- 6. Multiple Choice
What is an oxidizing agent?
It is the species that gets reduced -- gains electrons.
It is the species that gets oxidized -- loses electrons.
It is the species that creates electrons.
It is the species that loses electrons.
- 7. Multiple Choice
What is a galvanic (voltaic) cell?
It is a cell that destroys electrons on one side and creates electrons on the other side.
It is a cell that contains only one metal bar and one aqueous ion solution.
It is a type of battery that drives a redox reaction when electricity is applied.
It is a type of battery that generates an electrical current from redox reactions.
- 8. Multiple Choice
What is a half-reaction?
It is a reaction at equilibrium where half of the substances are reactants and half of the substances are products.
It is the reaction that occurs when the switch of a galvanic cell is open.
It shows EITHER the reduction component or the oxidation component of a redox reaction.
It shows BOTH the reduction and oxidation components of a redox reaction.
- 9. Multiple Choice
What is an anode?
It is the electrode where oxidation takes place.
It is the electrode where reduction takes place.
It is an aqueous solution containing an electrode.
It is the salt bridge that connects half-cells.
- 10. Multiple Choice
What is a cathode?
It is the electrode where oxidation takes place.
It is the electrode where reduction takes place.
It is an aqueous solution containing an electrode.
It is the salt bridge that connects half-cells.
- 11. Multiple Choice
Electrons always flow from
cathode to anode
anode to cathode
- 12. Multiple Choice
Oxidation occurs at the
anode
cathode
- 13. Multiple ChoiceAn iron nail is put into a solution of copper nitrate, iron is above copper in the activity series of metals, what will happen?iron will be reducedbubbles of oxygen gas will form on iron nailthe iron nail will become copper platedno reaction occurs
- 14. Multiple Choice
In the following reaction
Sn+2 + 2Fe+3 --> Sn+4 + 2Fe+2,
the reducing agent is...
Fe+3
Sn+2
Sn+4
Fe+2
- 15. Multiple Choice
What is oxidation number of Cr in Cr2O72-?
-2
+2
+6
+12
- 16. Multiple Choice
Which element is oxidised in the reaction Zn + 2HCl ZnCl2 + H2
Zinc
Hydrogen
Chlorine
None
- 17. Multiple Choice
State one functions of salt bridge
to maintain the movement of electron
to allowing electron to flow and complete the circuit
to separate two electrolyte
to maintain the electrical neutrality of the cell
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