1. Question

The quality of electricity required to discharge 1 mole of univalent ion is

9600C
48250C
96500C
193000C

2. Question

Consider the electrochemical cell notation: M_(s)/M²⁺_(aq)//H⁺_(aq)/H_2(g). The value of the electrode potential is positive when

the flow of current is high
electrons flow from hydrogen electrode, H_2(g) to metal electrode, M_(s)
electrons flow from the metal electrode, M_(s) to hydrogen electrode, H_2(g)
there is equilibrium between the flow of electrons from the hydrogen electrode, H2(g) to metal electrode, M(s)

3. Question

Which of the following metals is not extracted by electrolysis?

Iron
Sodium
Calcium
Magnesium

4. Question

Which of the following ions is discharged at the mercury cathode during the electrolysis of brine?

Na⁺
OH^–
Cl^–
H₃O⁺

5. Question

Copper can best be purified by

roasting the impure copper in a blast furnace
heating the oxide with cake
electrolyzing a copper (II) salt solution using the impure copper as the anode
converting the impure copper to a trioxonitrate (V)

6. Question

Which the following is not true about the cell notation of an electrochemical cell?

Single vertical line indicates phase boundary between the electrode and the electrolyte.
The right side of the salt bridge is the cathode half-cell.
The left side of the salt bridge is the anode half-cell.
Double vertical lines indicate the phase boundary between the electrode and the electrolyte.

7. Question

The EMF of a cell is

the total energy produced by a cell
the standard electrode potential for the anode half-cell alone
the standard electrode potential for the cathode half-cell alone
always positive

8. Question

Zinc displaces copper in an aqueous solution of copper (II) salt because

Copper is a transition metal
Copper is a moderately reactive metal
Zinc and Copper have reducing properties
Zinc is more reactive than copper

9. Question

Electrolysis is applied in all the following except

extraction of metals
preparation of some chemical compounds
extraction of crude oil
electroplating of metals

10. Question

What mass of copper would be formed when a current of 10.0 A is passed through a solution of CuSO4 for 1 hour? [Cu = 63.5; 1F = 96500C]

5.9 g
47.3 g
23.8 g
11.8 g

Pos.	Name	Entered on	Points	Result
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