Chapter 9 Practice Paper: Reactivity series and metal extraction — question paper

Section A: Multiple-choice questions[10 marks]

Choose one answer for each question. Each question is worth 1 mark.

1. 1

   Which metal reacts fastest with dilute hydrochloric acid?

   1. AIron
   2. BCopper
   3. CMagnesium
   4. DZinc
   ( )
2. 2

   Sodium is stored under oil because it

   1. Areacts vigorously with water vapour and oxygen in air
   2. Bmelts at room temperature
   3. Cis denser than oil
   4. Dis magnetic
   ( )
3. 3

   Which displacement actually happens?

   1. AGold foil in sodium chloride solution
   2. BAluminium foil in copper chloride solution
   3. CCopper foil in aluminium chloride solution
   4. DSilver foil in magnesium chloride solution
   ( )
4. 4

   In ZnO + C → Zn + CO, the zinc oxide is

   1. Aoxidised
   2. Ba catalyst
   3. Ca solvent
   4. Dreduced
   ( )
5. 5

   Which metal is extracted by electrolysis rather than carbon reduction?

   1. AAluminium
   2. BZinc
   3. CIron
   4. DCopper
   ( )
6. 6

   In the blast furnace, carbon monoxide is made when

   1. Ahot air meets the iron ore
   2. Bmolten iron is tapped
   3. Ccarbon dioxide reacts with more coke
   4. Dlimestone decomposes
   ( )
7. 7

   Gold jewellery survives centuries unchanged because gold

   1. Ais coated in oxide
   2. Breacts to form a protective layer
   3. Ccontains carbon
   4. Dis among the least reactive metals
   ( )
8. 8

   In the reaction Fe + Cu²⁺ → Fe²⁺ + Cu, the electrons flow from

   1. Athe solution to the air
   2. Biron atoms to copper ions
   3. Ccopper ions to iron atoms
   4. Dsulfate ions to iron
   ( )
9. 9

   Phytoextraction works by [Chemistry only]

   1. Aplants absorbing metal ions, then burning the harvest to concentrate them
   2. Bbacteria dissolving the ore
   3. Celectrolysing plant sap
   4. Dheating soil to 2000 °C
   ( )
10. 10

    The main disadvantage of both biological extraction methods is that they are

    1. Aillegal in most countries
    2. Bvery slow
    3. Cvery energy-hungry
    4. Dimpossible on low-grade ores
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

1. 11

   A student tests four metals with dilute hydrochloric acid and records the observations.

   Observations

   Metal	Observation
   P	No reaction
   Q	Slow steady fizzing
   R	Explosive — ignites the gas
   S	Fast fizzing

   1. (a)

      Name the gas produced by metals Q, R and S and state the test for it.

      [2]
   2. (b)

      Place P, Q, R and S in order of reactivity, most reactive first.

      [2]
   3. (c)

      Suggest a real metal that P could be.

      [1]
   4. (d)

      Explain why the acid must be the same concentration and volume for each metal.

      [1]
2. 12

   Iron is extracted in the blast furnace; aluminium in electrolysis cells.

   1. (a)

      Explain why the two metals need different extraction methods.

      [3]
   2. (b)

      In Fe₂O₃ + 3CO → 2Fe + 3CO₂, identify which substance is oxidised and which is reduced, giving a reason for each.

      [2]
   3. (c)

      Aluminium costs more than iron. Explain why, using extraction energy.

      [2]
3. 13

   Displacement and biological extraction. [Parts (d)–(e) are Chemistry only.]

   1. (a)

      A copper-coated iron nail is pulled from copper sulfate solution. Write the ionic equation for the reaction that coated it.

      [2]
   2. (b)

      Write the two half equations for this reaction and label oxidation and reduction. (Higher)

      [2]
   3. (c)

      Explain why the nail works but a copper-coated silver nail would not. (Higher)

      [1]
   4. (d)

      Describe the process of phytoextraction. [Chemistry only]

      [1]
   5. (e)

      State one advantage and one disadvantage of bioleaching. [Chemistry only]

      [1]