1. Which of the following metals burns brightly when heated in air / oxygen?

  1. gold
  2. copper
  3. tin
  4. magnesium

2. Which of the following metals does not react vigorously with water?

  1. Magnesium
  2. Lithium
  3. Sodium
  4. Potassium

3. Which of the following metals does not produce hydrogen gas when reacted with dilute sulphuric acid?

  1. Iron
  2. Gold
  3. Zinc
  4. Magnesium

The following applies to questions 4 to 6.

Metal W does not react with acid. Metal X reacts vigorously with water. Metal Z reacts slowly with water. Metal Y reacts slowly with acid but does not react with water.

4. The order of reactivity of the above metals (most reactive first) is

  1. W Y Z X
  2. X Z Y W
  3. Z Y W X
  4. Y W Z X

5. Metal X could be

  1. sodium
  2. magnesium
  3. iron
  4. copper

6. Metal Y could be

  1. sodium
  2. magnesium
  3. iron
  4. copper

7. A metal ore is

  1. a compound of the metal made in the laboratory
  2. a naturally occurring compound of the metal
  3. a sample of the pure metal made in the laboratory
  4. a naturally occurring sample of the pure metal

8. Which of the following metals is most likely to be found uncombined (native) in the Earth's crust?

  1. Sodium
  2. Magnesium
  3. Gold
  4. Iron

9. Which of the following metals is most likely to be extracted from its ore by heating with carbon?

  1. Sodium
  2. Magnesium
  3. Gold
  4. Iron

10. Which of the following metals is most likely to be extracted from its ore using electrolysis?

  1. Sodium
  2. Copper
  3. Gold
  4. Iron

11. Iron is produced from iron ore in the Blast Furnace. The three substances added at the top of the furnace are

  1. iron ore, coke, limestone
  2. iron ore, coal, limestone
  3. iron ore, coke, granite
  4. iron metal, coke, limestone

12. In the Blast Furnace the gas mainly responsible for reducing the iron oxide to iron is

  1. carbon dioxide
  2. carbon monoxide
  3. sulphur dioxide
  4. nitrogen monoxide

13. Which of the following metals will corrode the fastest?

  1. Sodium
  2. Magnesium
  3. Zinc
  4. Gold

14. In the reaction between magnesium metal and sulphuric acid, the spectator ion is

  1. Mg2+(aq)
  2. SO42-(aq)
  3. H+(aq)
  4. Cl-(aq)

15. In the reaction between copper (II) carbonate and sulphuric acid, the spectator ion is

  1. Mg2+(aq)
  2. SO42-(aq)
  3. H+(aq)
  4. CO32-(aq)

16. In the reaction between zinc oxide metal and hydrochloric acid, the spectator ion is

  1. Zn2+(aq)
  2. SO42-(aq)
  3. H+(aq)
  4. Cl-(aq)

17. In the reaction between sodium hydroxide and nitric acid, the spectator ions are

  1. Na+(aq) and NO3-(aq)
  2. NO3-(aq) and H+(aq)
  3. H+(aq) and OH-(aq)
  4. OH-(aq) and Na+(aq)

18. When two different metals are connected together with an electrolyte a simple cell is formed. Which of the following pairs of metals will give the highest voltage?

  1. Magnesium and copper
  2. Zinc and iron
  3. Copper and silver
  4. Magnesium and silver

19. When two different metals are connected together with an electrolyte a simple cell is formed. Which of the following pairs of metals will give the smallest voltage?

  1. Magnesium and copper
  2. Zinc and iron
  3. Zinc and silver
  4. Magnesium and silver

20. The purpose of the electrolyte in a cell is to

  1. allow ions to diffuse and so complete the circuit
  2. allow electrons to diffuse and so complete the circuit
  3. allow atoms to diffuse and so complete the circuit
  4. to prevent the movement of charged particles between the electrodes

21. For which of the following pairs of metals, would the electrons flow from the first named metal to the last named metal? (Assuming that the metals are connected in a cell)

  1. Zinc and calcium
  2. Iron and lead
  3. Copper and tin
  4. Iron and magnesium

22. Which of the following pairs of chemicals would produce a reaction?

  1. Copper + magnesium sulphate solution
  2. Zinc + iron (II) nitrate solution
  3. Magnesium + sodium chloride solution
  4. Tin + aluminium chloride solution

23. When metals are placed in an order according to the voltage they produce in a cell, we call this series

  1. the spectrochemical series
  2. the electromagnetic series
  3. the electrochemical series
  4. the spectromagnetic series

24. Oxidation is the

  1. loss of electrons
  2. gain of electrons
  3. loss of protons
  4. gain of electrons

25. Reduction is the

  1. loss of electrons
  2. gain of electrons
  3. loss of protons
  4. gain of electrons

26. Which of the following processes represents oxidation?

  1. Cu2+  Cu
  2. Na+  Na
  3. Mg  Mg2+
  4. Fe3+  Fe2+

27. Which of the following processes represents reduction?

  1. Cu  Cu2+
  2. Na+  Na
  3. Mg  Mg2+
  4. Fe2+  Fe3+

28. In the following ion-electron equation, what is the value for n?

Sn4+ + n e-  Sn2+

  1. 1
  2. 2
  3. 3
  4. 4

29.

Cu2+ + 2e-  Cu

Mg  Mg2+ + 2e-

The correct redox equation, obtained by adding the above ion-electron equations is

  1. Mg2+ + Cu Cu2+ + Mg
  2. Cu2+ + Mg Mg2+ + Cu
  3. Cu2+ + 2Mg  Mg2+ + Cu
  4. Cu2+ + Mg  Mg2+ + 2Cu

30.

Ag+ + e-  Ag

Mg  Mg2+ + 2e-

The correct redox equation, obtained by adding the above ion-electron equations is

  1. Mg2+ + 2Ag 2Ag+ + Mg
  2. Ag+ + Mg Mg2+ + Ag
  3. 2Ag+ + Mg Mg2+ + 2Ag
  4. Ag+ + 2Mg 2Mg2+ + Ag

The diagram below applies to questions 31 and 32.

The following apparatus was used to electrolyse copper (II) chloride solution

31. The product at the positive electrode is

  1. Copper
  2. Chlorine
  3. Oxygen
  4. Hydrogen

32. Oxidation takes place at

  1. positive electrode
  2. negative electrode
  3. both electrodes
  4. neither of the electrodes

Questions 33 to 40 refer to the following cell

33. The purpose of the salt (or ion) bridge is

  1. allow ions to diffuse and so complete the circuit
  2. allow electrons to diffuse and so complete the circuit
  3. allow atoms to diffuse and so complete the circuit
  4. to prevent the movement of charged particles between the electrodes

34. Electrons flow from

  1. left to right through the salt bridge
  2. left to right through the external circuit
  3. right to left through the salt bridge
  4. right to left through the external circuit

35. Oxidation takes place at

  1. the LH electrode
  2. the RH electrode
  3. both electrodes
  4. neither of the electrodes

36. Reduction takes place at

  1. the LH electrode
  2. the RH electrode
  3. both electrodes
  4. neither of the electrodes

37. The equation for the reaction occurring at the RH electrode is

  1. Mg  Mg2+ + 2e-
  2. Mg2+ + 2e-  Mg
  3. Cu  Cu2+ + 2e-
  4. Cu2+ + 2e-  Cu

38. The equation for the reaction occurring at the LH electrode is

  1. Mg  Mg2+ + 2e-
  2. Mg2+ + 2e-  Mg
  3. Cu  Cu2+ + 2e
  4. Cu2+ + 2e-  Cu

39. If the cell is allowed to run for some time, the mass of the magnesium electrode will

  1. increase
  2. decrease
  3. stay the same
  4. impossible to predict

40. If the cell is allowed to run for some time, the mass of the copper electrode will

  1. increase
  2. decrease
  3. stay the same
  4. impossible to predict

41. The term "rusting" applies to the corrosion of

  1. copper
  2. iron and steel
  3. zinc
  4. magnesium

42. Which two substances must be present for rusting to occur?

  1. Water and nitrogen
  2. Nitrogen and oxygen
  3. Water and oxygen
  4. Nitrogen and water

43. Which of the following ion-electron equations does not occur during rusting?

  1. Fe  Fe2+ + 2e-
  2. Fe3+ + e- Fe2+
  3. 2H2O + O2 + 4e¯  4OH-
  4. Fe2+  Fe3+ + e-

44. The name of the indicator used to detect rusting is called

  1. litmus
  2. universal indicator
  3. ferroxyl indicator
  4. bicarbonate indicator

45. The two ions detected by ferroxyl indicator are

  1. Fe2+ and H+
  2. Fe3+ and OH-
  3. Fe2+ and OH-
  4. Fe3+ and H+

46. Which of the following correctly describes the effect of salt and acid rain on the rate of rusting?

Effect salt on rate of rusting / Effect acid rain on rate of rusting
A / Increases / Decreases
B / Decreases / Increases
C / Increases / Increases
D / Decreases / Decreases

47. Which of the following metals when connected to iron, will increase the rate of rusting of the iron?

  1. Tin
  2. Zinc
  3. Aluminium
  4. Magnesium

48. Which of the following metals when connected to iron, will decrease the rate of rusting of the iron?

  1. Copper
  2. Silver
  3. Gold
  4. Magnesium

49. Which of the following metals when connected to iron, will cause electrons to flow to the iron?

  1. Copper
  2. Zinc
  3. Silver
  4. Gold

For questions 50 to 52, use the following:

  1. Attaching magnesium
  2. Plastic coating
  3. Painting
  4. Galvanising

50. Which of the above involves coating with zinc?

51. Which of the above offers physical protection and also offers protection if the coating becomes damaged?

52. Which of the above does not offer any physical protection?

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