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Chemistry Chapter 10

maurice wong 15 questions

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Questions in this quiz (15)

  1. 1Metals are found in rocks in the Earth’s crust. Very few metals are found in [blank_start]free state[blank_end]. Most metals combine with other elements to form [blank_start]compounds[blank_end].
    1. Afree state
    2. Bcompounds
  2. 2Rocks which contain useful minerals are called [blank_start]ores[blank_end].
    Examples: [blank_start]bauxite[blank_end] (Al2O3), [blank_start]copper pyrite[blank_end](CuFeS2), [blank_start]haematite[blank_end](Fe2O3), [blank_start]galena[blank_end] (PbS)
    1. Aores
    2. Bbauxite
    3. Ccopper pyrite
    4. Dhaematite
    5. Egalena
  3. 3Some unreactive metals are extracted by heating their ores in [blank_start]along[blank_end] strongly.
    [blank_start]2Ag2O(s)[blank_end] → [blank_start]4Ag(s)[blank_end] + [blank_start]O2(g)[blank_end]
    [blank_start]HgS(s)[blank_end] + [blank_start]O2(g)[blank_end] → [blank_start]Hg(g)[blank_end] + [blank_start]SO2(g)[blank_end]
    1. Aalong
    2. B2Ag2O(s)
    3. C4Ag(s)
    4. DO2(g)
    5. EHgS(s)
    6. FO2(g)
    7. GHg(g)
    8. HSO2(g)
  4. 4Some metals are extracted by heating their ores with [blank_start]carbon[blank_end]. This method is called [blank_start]carbon reduction[blank_end].
    1. Acarbon
    2. Bcarbon reduction
  5. 5Lead exists as [blank_start]lead(II) sulphide[blank_end]([blank_start]PbS[blank_end]) in its ore. Firstly, the ore is heated strongly to form [blank_start]lead(II) oxide[blank_end],
    [blank_start]2PbS(s)[blank_end] + [blank_start]3O2(g)[blank_end] → [blank_start]2PbO(s)[blank_end] + [blank_start]2SO2(g)[blank_end]
    The [blank_start]lead(II) oxide[blank_end] formed in the reaction is heated with [blank_start]carbon[blank_end] to change to [blank_start]lead[blank_end].
    [blank_start]2PbO(s)[blank_end] + [blank_start]C(s)[blank_end] → [blank_start]Pb(s)[blank_end] + [blank_start]CO2(g)[blank_end]
    In the laboratory, we can extract lead by heating [blank_start]lead(II) oxide[blank_end] with carbon powder in the [blank_start]crucible[blank_end].
    1. Alead(II) sulphide
    2. BPbS
    3. Clead(II) oxide
    4. D2PbS(s)
    5. E3O2(g)
    6. F2PbO(s)
    7. G2SO2(g)
    8. Hlead(II) oxide
    9. Icarbon
    10. Jlead
    11. K2PbO(s)
    12. LC(s)
    13. MPb(s)
    14. NCO2(g)
    15. Olead(II) oxide
    16. Pcrucible
  6. 6Iron is extracted from its ore in a [blank_start]blast furnace[blank_end]. The raw materials are [blank_start]iron ore[blank_end], [blank_start]coke[blank_end] ( a form of carbon), [blank_start]limestone[blank_end] and [blank_start]air[blank_end].
    During the extraction, a mixture of [blank_start]iron ore[blank_end], [blank_start]coke[blank_end] and [blank_start]limestone[blank_end] is added on the [blank_start]top[blank_end] of the furnace. Hot air is blasted in to the furnace from the [blank_start]bottom[blank_end].
    [blank_start]Oxygen[blank_end] from the air reacts with coke in a chain of chemical reactions to form [blank_start]carbon monoxide[blank_end]. Carbon monoxide then removes oxygen from [blank_start]iron(III) oxide[blank_end], producing the [blank_start]iron metal[blank_end].
    [blank_start]Fe2O3(s)[blank_end] + [blank_start]3CO(g)[blank_end] → [blank_start]2Fe(l)[blank_end] + [blank_start]3CO2(g)[blank_end]
    At the high temperature of the furnace, the iron formed is [blank_start]melted[blank_end] and runs off at the [blank_start]bottom[blank_end] of the furnace.
    1. Ablast furnace
    2. Biron ore
    3. Ccoke
    4. Dlimestone
    5. Eair
    6. Firon ore
    7. Gcoke
    8. Hlimestone
    9. Itop
    10. Jbottom
    11. KOxygen
    12. Lcarbon monoxide
    13. Miron(III) oxide
    14. Niron metal
    15. OFe2O3(s)
    16. P3CO(g)
    17. Q2Fe(l)
    18. R3CO2(g)
    19. Smelted
    20. Tbottom
  7. 7Some metals are extracted by [blank_start]electrolysis[blank_end] of their [blank_start]molten[blank_end] ores.
    1. Aelectrolysis
    2. Bmolten
  8. 8It is an [blank_start]expensive[blank_end] method because a large amount of [blank_start]electricity[blank_end] is used. Part of the electricity is used to keep the metal ore in [blank_start]molten[blank_end] form during [blank_start]electrolysis[blank_end].
    It is an [blank_start]effective[blank_end] method to extract [blank_start]reactive[blank_end] metals.
    During electrolysis, [blank_start]purified[blank_end] ore is [blank_start]melted[blank_end] and [blank_start]electricity[blank_end] is then passed through the ore to extract metal from it.
    1. Aexpensive
    2. Belectricity
    3. Cmolten
    4. Delectrolysis
    5. Eeffective
    6. Freactive
    7. Gpurified
    8. Hmelted
    9. Ielectricity
  9. 9Factors affecting the availability of a metal include:
    1. [blank_start]abundance[blank_end] of the metal in the Earth’s crust
    2. [blank_start]ease[blank_end] and [blank_start]cost[blank_end] of [blank_start]mining[blank_end] the ore
    3. [blank_start]ease[blank_end] and [blank_start]cost[blank_end] of [blank_start]extracting[blank_end] the metal from its ore
    In general, the [blank_start]less available[blank_end] a metal is, the [blank_start]more expensive[blank_end] it is.
    1. Aabundance
    2. Bease
    3. Ccost
    4. Dmining
    5. Eease
    6. Fcost
    7. Gextracting
    8. Hless available
    9. Imore expensive
  10. 10Metal ore in the Earth’s crust are [blank_start]limited[blank_end] in amount and [blank_start]non-renewable[blank_end]. There is a need for [blank_start]conservation[blank_end].
    Three common ways to conserve metals are:
    1. [blank_start]reusing[blank_end] metal articles
    2. reducing the [blank_start]use[blank_end] of metals
    3. recycling [blank_start]used[blank_end] metals
    1. Alimited
    2. Bnon-renewable
    3. Cconservation
    4. Dreusing
    5. Euse
    6. Fused

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Description
Form 4 Chemistry Quiz on Chemistry Chapter 10, created by maurice wong on 14/12/2019.
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