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SULIT

                            NAMA: _______________________________________________                         TINGKATAN: ______________
   Lekat logo
    sekolah
     di sini                TOPICAL TEST 6: ELECTROCHEMISTRY
                            UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1

 1 Which of the following is true about                B Solid sodium chloride contains               electrolysis of molten magnesium
   an electrolyte?                                       atoms while molten sodium                    chloride?
    Antara yang berikut, manakah benar tentang           chloride contains ions.                      Antara yang berikut, manakah menunjukkan
    elektrolit?                                           Pepejal natrium klorida mengandungi         persamaan setengah di katod dalam
    I Electrolyte conducts electricity in                 atom manakala leburan natrium klorida       elektrolisis leburan magnesium klorida?
      molten state.                                       mengandungi ion.                            A 2Cl () → Cl2 () + 2e
        Elektrolit mengalirkan elektrik dalam          C Solid sodium chloride contains                   2Cl (ce) → Cl2 (ce) + 2e
        keadaan leburan.                                 molecules while molten sodium                B 2H+ (aq) + 2e → H2 (g)
    II Electrolyte conducts electricity in               chloride contains ions.                          2H+ (ak) + 2e → H2 (g)
       solid state.                                       Pepejal natrium klorida mengandungi         C Mg2+ () + 2e → Mg (s)
        Elektrolit mengalirkan elektrik dalam             molekul manakala leburan natrium                Mg2+ (ce) + 2e → Mg (p)
        keadaan pepejal.                                  klorida mengandungi ion.                    D 4OH– (aq) → 2H2O () + O2 (g) + 4e
    III Electrolyte is soluble in water.               D Solid sodium chloride contains                   4OH– (ak) + 2H2O (ce) + O2 (g) + 4e
        Elektrolit larut dalam air.                      atoms while molten sodium
    IV Electrolyte undergoes chemical                    chloride contains molecules.              8 Which of the following happens
       decomposition when it conducts                     Pepejal natrium klorida mengandungi        during the electrolysis of molten
       electricity.                                       atom manakala leburan natrium klorida
                                                          mengandungi molekul.
                                                                                                     sodium bromide?
        Elektrolit mengalami penguraian kimia                                                         Antara yang berikut, manakah akan berlaku
        semasa mengalirkan elektrik.                                                                  semasa elektrolisis leburan natrium bromida?
    A I and II only         C II and IV only         5 Diagram 1 shows the apparatus set-             I Sodium ions are attracted to the
        I dan II sahaja          II dan IV sahaja      up of an experiment.                             cathode.
    B II and III only D I and IV only                  Rajah 1 menunjukkan susunan radas bagi             Ion natrium tertarik ke katod.
        II dan III sahaja        I dan IV sahaja       satu eksperimen.
                                                                                                      II Bromide ions are attracted to the
 2 Which of the following is not an                                                                      anode.
                                                                                                          Ion bromida tertarik ke anod.
   electrolyte?
    Antara yang       berikut,   manakah     bukan
                                                                                                      III Electrons are moving from anode
    elektrolit?                                                                                           to cathode.
    A Molten glucose                                                                                      Elektron bergerak dari anod ke katod.
        Leburan glukosa                                                                               IV At the cathode, bromine ions
    B Aqueous ammonia                                                                                    accept electron from anode.
        Akueus ammonia                                                                                    Di katod, ion bromin menerima elektron
    C Molten lead (II) bromide                                                                            dari anod.
                                                                  Diagram 1 Rajah 1
        Leburan plumbum (II) bromida                                                                  A I, II and III only
                                                       Which of the following is most                     I, II dan III sahaja
    D Molten potassium iodide
        Leburan kalium iodida
                                                       probably substance X?                          B I, II and IV only
                                                       Antara     yang      berikut,     manakah          I, II dan IV sahaja
                                                       berkemungkinan besar ialah bahan X?
 3 Naphthalene does not                  conduct                                                      C I, III and IV only
                                                       A Molten napthalene                                I, III dan IV sahaja
   electricity because it                                 Leburan naftalena
    Naftalena tidak mengalirkan elektrik kerana
                                                                                                      D II, III and IV only
                                                       B Pure ethanol                                     II, III dan IV sahaja
    A contains freely moving electrons.                   Etanol tulen
        mengandungi elektron yang bergerak             C Solid lead (II) bromide
        bebas.                                            Pepejal plumbum (II) bromida             9 Which of the following is true about
    B has very low melting points.                     D Potassium iodide solution                   the process that takes place in the
        mempunyai takat lebur yang sangat                 Larutan kalium iodida                      electrolysis of molten copper (II)
        rendah.
                                                                                                     bromide?
    C consists of molecules which are                                                                 Antara yang berikut, manakah benar tentang
                                                     6 What are the ions present in molten
      uncharged particles.                                                                            proses yang mengambil bahagian dalam
        terdiri dariapda molekul-molekul di mana
                                                       lead (II) bromide?                             elektrolisis leburan kuprum (II) bromida?
        ialah zarah-zarah tidak bercas.                Apakah ion-ion yang hadir dalam leburan
                                                       plumbum (II) bromida?                                    Anode                Cathode
    D contains ionic compounds which                                                                             Anod                  Katod
                                                       A PbBr2
      can dissolve in water.                              PbBr2
        mengandungi sebatian ion yang boleh
                                                       B Pb and Br                                    A            O2                      H2
        larut dalam air.
                                                          Pb dan Br                                               Br2                      H2
                                                                                                      B
                                                       C Pb2+ and Br–
4 Which of the following is true about                    Pb2+ dan Br–                                C            O2                      Cu
  the particles present in solid and                   D Pb2+ and Br2–
  molten sodium chloride?                                 Pb2+ dan Br2–
                                                                                                      D           Br2                      Cu
    Antara yang berikut, manakah benar tentang
    zarah-zarah yang hadir dalam pepejal dan
    leburan natrium klorida?                                                                       10 Diagram 2 shows the arrangement of
    A Both solid and molten sodium                                                                    apparatus for electrolysis of iron
      chloride contain ions.                         7 Which of the following shows the               (III) nitrate solution.
        Kedua-dua pepejal dan leburan natrium          half equation at the cathode in the            Rajah 2 menunjukkan susunan radas bagi
        klorida mengandungi ion-ion.                                                                  elektrolisis larutan ferum (III) nitrat.


© Navision (M) Sdn. Bhd. (690640-P)                                       41                                                      SULIT
SULIT

                         NAMA: _______________________________________________                                    TINGKATAN: ______________
   Lekat logo
    sekolah
     di sini                TOPICAL TEST 6: ELECTROCHEMISTRY
                            UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1
                                                                                                               II Concentration of ions in the
                                                                                                                  solution.
                                                                                                                  Kepekatan ion dalam larutan.
                                                                                                               III The molecular mass of the atom
                                                                                                                   used.
                                                                                                                  Jisim molekul bagi atom yang digunakan.
                                                                                                               IV Position     of       ions               in
                                                                                                                  electrochemical series.
                                                                                                                  Kedudukan ion dalam siri elektrokimia.
                                                                                                               A I, II and III only
                                                                                                                  I, II dan III sahaja
                                                                                                               B I, II and IV only
             Diagram 2 Rajah 2                                 Diagram 3 Rajah 3                                  I, II dan IV sahaja
    What is formed at carbon electrode Q?             What need to be changed in order to                      C I, III and IV only
    Apakah yang terbentuk di elektrod karbon Q?       get different gas from this                                 I, III dan IV sahaja
    A Hydrogen gas                                    experiment?                                              D II, III and IV only
        Gas hidrogen                                  Apakah yang perlu diubah supaya mendapat                    II, III dan IV sahaja
    B Oxygen gas                                      gas yang berbeza daripada eksperimen ini?
        Gas oksigen                                   A Substitute carbon electrodes with                   16 Diagram 4 shows the set-up of the
    C Iron metal                                        copper electrodes.                                     apparatus used to electroplate an
        Logam besi                                       Gantikan elektrod           karbon        dengan      iron key with silver.
    D Nitrogen gas                                       elektrod kuprum.                                      Rajah 4 menunjukkan susunan radas yang
        Gas nitrogen                                  B Use a more concentrated copper                         digunakan untuk menyadur kunci besi dengan
                                                        (II) chloride solution.                                argentum.
11 What are the ions that present in                     Gunakan larutan kuprum (II) klorida
                                                         yang lebih pekat.
   dilute copper (II) chloride solution?
    Apakah ion-ion yang wujud dalam larutan           C Change         the        position    of      the
    kuprum (II) klorida cair?                           battery.
    A Cu2+ and Cl–                                       Tukarkan kedudukan bateri.
        Cu2+ dan Cl–                                  D Substitute carbon electrodes with
    B Cu2+, Cl– and H2O                                 platinum.
        Cu2+, Cl– dan H2O                                Gantikan      elektrod      karbon        dengan
    C Cu2+, H+, Cl– and OH–                              platinum.
        Cu2+, H+, Cl– dan OH–
    D Cu2+, H+, Cl– and H2O                        14 Which of the following is the true
        Cu2+, H+, Cl– dan H2O                         reactions taking place during the                                 Diagram 4 Rajah 4
                                                      electrolysis of dilute copper (II)
12 The electrolysis of aqueous sodium                                                                          What is the observation after 30
                                                      sulphate solution using carbon as the
   nitrate using carbon electrode was                                                                          minutes?
                                                      electrodes?                                              Apakah pemerhatian selepas 30 minit?
   carried out in a lab. Which of the                 Antara yang berikut, manakah benar tentang
   following is true about this                       tindak balas yang mengambil bahagian                     I At anode, silver foil become
   experiment?                                        semasa elektrolisis larutan kuprum (II) sulfat             thinner.
                                                      cair dengan menggunakan karbon sebagai                      Di anod, foil argentum menjadi lebih
    Elektrolisis  akueus     natrium      nitrat
                                                      elektrod?                                                   nipis.
    menggunakan elektrod karbon dijalankan
    dalam makmal. Antara yang berikut,                         Anode                   Cathode                 II At anode, shinny grey deposits
    manakah benar tentang eksperimen ini?                           Anod                   Katod                  are formed.
    A The sodium ions are discharged                                                                              Di anod,       enapan    kelabu   berkilat
                                                      A SO42–→                     Cu2+ + 2e → Cu                 terbentuk.
      at the cathode.
        Ion natrium dinyahcaskan di katod.              S + 2O2 + 2e                                           III At cathode, gas bubbles are
    B The nitrate ions are discharged at                                                                           released.
                                                      B 4OH– →         Cu2+ + 2e → Cu                             Di katod, gelembung gas dibebaskan.
      the anode.                                        2H2O + O2 + 4e
        Ion nitrat dinyahcaskan di anod.                                                                       IV At cathode, shinny grey deposits
    C Hydrogen gas is produced in the                 C SO42– →                     2H+ + 2e → H2                 are formed.
      anode.                                            S + 2O2 + 2e                                              Di katod,      enapan    kelabu   berkilat
                                                                                                                  terbentuk.
        Gas hidrogen dihasilkan di anod.              D 4OH →   –
                                                                       2H + 2e → H2    +

    D Oxygen gas is produced in the                                                                            A I and II only
                                                        2H2O + O2 + 4e                                            I dan II sahaja
      anode.                                                                                                   B II and III only
        Gas oksigen dihasilkan di anod.
                                                   15 Which of the following are the factors                      II dan III sahaja
                                                      that determine the type of ions to be                    C II and IV only
13 Diagram 3 shows an apparatus set-                                                                              II dan IV sahaja
   up for an electrolysis process.                    discharged at the electrodes?
                                                      Antara yang berikut, manakah ialah faktor                D I and IV only
    Rajah 3 menunjukkan susunan radas bagi
                                                      yang menentukan jenis ion yang dinyahcas di                 I dan IV sahaja
    satu proses elektrolisis.
                                                      elektrod?
                                                      I Type of electrode used.
                                                         Jenis elektrod yang diguna.

© Navision (M) Sdn. Bhd. (690640-P)                                          42                                                           SULIT
SULIT

                           NAMA: _______________________________________________                            TINGKATAN: ______________
   Lekat logo
    sekolah
     di sini                TOPICAL TEST 6: ELECTROCHEMISTRY
                            UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1
17 Information below shows the main                     B Change aqueous nickel nitrate to                     Besi                  Kuprum
   aim of process X.                                      concentrated  nickel     nitrate
    Maklumat di bawah menunjukkan tujuan                  solution.
    utama bagi proses X.                                    Tukarkan akueus nikel nitrat kepada       22 Diagram 7 shows the set-up of the
       ● Prevent corrosion.                                 larutan nikel nitrat pekat.
                                                                                                         apparatus of a simple voltaic cell.
          Mencegah kakisan                              C Replace the nickel electrode with              Rajah 7 menunjukkan susunan radas bagi
       ● Improve the appearance.                          the carbon electrode.                          satu sel voltan ringkas.
          Memperbaiki rupa luaran.                          Gantikan elektrod nikel dengan elektrod
                                                            karbon.
    What is process X?                                  D Change the spoon to an iron key.
    Apakah proses X?                                        Tukarkan sudu kepada kunci besi.
    A Electrolysis           C Electroplating
        Elektrolisis            Penyaduran
                                                    20 Which of the following shows the
    B Extraction             D Wrapping
        Pengekstrakan           Pembalutan             equations that takes place in anode
18 Which of the following is true about                and cathode during the purification
   electroplating an iron key with                     of impure copper?
                                                        Antara yang berikut, manakah menunjukkan
   copper?                                              persamaan yang mengambil bahagian di
    Antara yang berikut, manakah benar tentang          anod dan katod semasa penulenan kuprum
    penyaduran kunci besi dengan kuprum?                tidak tulen?                                              Diagram 7 Rajah 7
         Anode Cathode Electrolyte                                                                       Which of the following is true about
          Anod  Katod   solution                                 Anode               Cathode             the voltaic cell?
                                       Larutan                    Anod                 Katod             Antara yang berikut, manakah benar tentang
                                       elektrolit                                                        sel voltan?
                                                        A Cu2+ + 2e → Cu Cu → Cu2+ + 2e
   A               Copper              AgNO3                                                             I The copper               plate    dissolves
        Iron key                                                                                           gradually.
        Kunci besi  rod                solution         B Cu → Cu2+ + 2e Cu2+ + 2e → Cu
                       Rod kuprum Larutan AgNO3                                                             Kepingan kuprum terlarut sedikit demi
                                                                                                            sedikit.
   B     Copper                        AgNO3            C                      –
                                                             2H+ + 2e → H2 4OH →                         II The zinc plate acts as negative
                Iron key                                                   2H2O + O2 + 4e                   terminal.
          rod   Kunci besi             solution
        Rod kuprum                Larutan AgNO3                                                             Kepingan zink bertindak sebagai terminal
                                                        D 4OH– →         2H+ + 2e → H2                      negatif.
                                                          2H2O + O2 + 4e                                 III The zinc plate become thinner.
   C               Copper               CuSO4
        Iron key                                                                                            Kepingan zink menjadi nipis.
        Kunci besi  rod                solution                                                          IV Electrons flow from zinc plate to
                       Rod kuprum Larutan CuSO4     21 Diagram 6 shows the set-up of the
                                                       apparatus of a simple chemical cell.                 copper plate.
                                                        Rajah 6 menunjukkan susunan radas bagi              Elekron mengalir dari kepingan zink ke
   D     Copper                         CuSO4                                                               kepingan kuprum.
                Iron key                                satu sel kimia ringkas.
          rod   Kunci besi             solution                                                          A I, II and III only
        Rod kuprum                Larutan CuSO4                                                             I, II dan III sahaja
                                                                                                         B I, II and IV only
                                                                                                            I, II dan IV sahaja
19 Diagram 5 shows the set-up of the                                                                     C I, III and IV only
   apparatus used in an experiment.                                                                         I, III dan IV sahaja
    Rajah 5 menunjukkan susunan radas yang                                                               D II, III and IV only
    digunakan dalam satu eksperimen.                                                                        II, III dan IV sahaja

                                                                                                      23 Diagram 8 shows the set-up of the
                                                                                                         apparatus of a certain voltaic cell.
                                                                 Diagram 6 Rajah 6                       Rajah 8 menunjukkan susunan radas bagi
                                                        What are metals P and Q?                         satu sel voltan tertentu.
                                                        Apakah logam P dan Q?
                                                             Metal P              Metal Q
                                                             Logam P              Logam Q

                                                    A         Lead               Magnesium
                                                             Plumbum             Magnesium
              Diagram 5 Rajah 5
    What change would you make so                   B         Zinc               Aluminium
    that the experiment is successful?                         Zink               Aluminium
    Apakah perubahan yang anda perlu buat
    supaya eksperimen ini berjaya?
                                                    C       Magnesium             Copper
    A The terminal of the batteries are                     Magnesium              Kuprum
      reversed.
        Terbalikkan terminal bateri.                                                                              Diagram 8 Rajah 8
                                                    D          Iron               Copper

© Navision (M) Sdn. Bhd. (690640-P)                                         43                                                       SULIT
SULIT

                            NAMA: _______________________________________________                                  TINGKATAN: ______________
   Lekat logo
    sekolah
     di sini                    TOPICAL TEST 6: ELECTROCHEMISTRY
                                UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1
    Which of the following changes can                       Apakah sel X?                                         Celupkan cincin dalam minyak.
    increase the reading on the                              A Daniell cell             C Alkaline cell       B Wash the ring with soap.
                                                                 Sel Daniell               Sel alkali              Cucikan cincin dengan sabun.
    voltmeter?
    Antara perubahan yang berikut, manakah                   B Mercury cell             D Nickel cell         C Plate the ring with gold.
    boleh menaikkan bacaan voltmeter?                            Sel merkuri               Sel nikel               Sadurkan cincin dengan emas.
    A Use a more concentrated sodium                                                                          D Polished the ring with water.
                                                          26 Diagram 9 shows a chemical cell.                      Gilapkan cincin dengan air.
      chloride.
         Gunakan larutan natrium klorida yang                Rajah 9 menunjukkan satu sel kimia.
         lebih pekat.                                                                                      29 Diagram 10 shows a chemical cell.
    B Change the zinc                       plate    to                                                       Rajah 10 menunjukkan satu sel kimia.
      magnesium plate.
         Tukarkan kepingan zink kepada kepingan
         magnesium.
    C Change the copper plate to ledd
      plate.
         Tukarkan kepingan            kuprum    kepada
         kepingan plumbum.
    D Increase the volume of aqueous
      sodium chloride.
         Tambahkan isi padu akueus natrium
         klorida.
                                                                                                                       Diagram 10 Rajah 10
24 Which of the following is correct                                   Diagram 9 Rajah 9                      Which of the following can get the
   between an electrolytic cell and                          What is the correct chemical                     highest reading on the voltmeter?
   voltaic cell?                                             reaction that takes place in the                 Antara yang berikut, manakah boleh
    Antara yang berikut, manakah betul bagi sel                                                               memperoleh bacaan voltmeter yang paling
    elektrolisis dan sel voltan?                             positive terminal of the chemical                tinggi?
    I Cathode is the negative terminal                       cell?
                                                             Apakah tindak balas kimia yang betul yang                  Plat X                 Plat Y
      in voltaic cell.                                       mengambil bahagian di terminal positif                   Kepingan X           Kepingan Y
         Katod ialah terminal negatif dalam sel              dalam sel kimia?
         voltan.
                                                             A   Zn2+ + 2e → Zn                               A             Zinc          Magnesium
                                                                                                                            Zink           Magnesium
                                                             B   Zn → Zn2+ + 2e
    II Electrons flow from anode to the
                                                             C   Ag+ + e → Ag                                 B             Zinc               Copper
       cathode in electrolytic cell.
         Elektron mengalir dari anod ke katod                D   Ag → Ag+ + e                                               Zink               Kuprum
         dalam sel elektrolisis.
                                                                                                              C      Magnesium                 Copper
    III Anion is attracted to the anode in                                                                             Magnesium               Kuprum
        the electrolytic cell.
         Anion tertarik         ke   anod   dalam   sel   27 Which of the following is true about             D      Magnesium                  Silver
         elektrolisis.                                                                                                 Magnesium               Argentum
                                                             the advantages of the dry cell?
    IV Graphite is not use as electrodes                     Antara yang berikut, manakah benar tentang
       in the voltaic cell.                                  kelebihan sel kering?
         Grafit tidak digunakan sebagai elektrod             I Cheap
         dalam sel voltan.                                       Murah
    A I, II and III only                                     II Easy to be carried
         I, II dan III sahaja                                    Mudah dibawa                              30 Table 1 shows the information about
    B I, II and IV only                                      III Can be recharged                             three simple cells.
         I, II dan IV sahaja                                     Boleh dicas semula                           Jadual 1 menunjukkan maklumat tentang tiga
    C I, III and IV only                                     IV Available in different size                   sel ringkas.
         I, III dan IV sahaja                                    Terdapat pelbagai saiz
                                                                                                                  Metal    Potential    Positive
    D II, III and IV only                                    A I, II and III only
         II, III dan IV sahaja                                                                                    pairs difference (V) terminal
                                                                 I, II dan III sahaja
                                                                                                               Pasangan       Beza keupayaan      Terminal
                                                             B I, II and IV only                                logam               (V)            positif
25 Information below                   shows        the          I, II dan IV sahaja
   description of cell X.                                    C I, III and IV only
    Maklumat di bawah menunjukkan huraian                        I, III dan IV sahaja                          P and Q             1.3               P
    tentang sel X.                                           D II, III and IV only                                P dan Q
                                                                 II, III dan IV sahaja
        ● Portable                                                                                             P and R
          Mudah alih                                                                                                               2.1               P
                                                                                                                  P dan R
        ● Stable voltage                                  28 Jane wants to make her ring more
          Voltan stabil                                      beautiful and prevent corrosion.                  R and S
        ● Not rechargeable                                                                                                         1.8               R
                                                             What is the best way to achieve this?                R dan S
          Tidak boleh dicas semula                           Jane hendak menjadikan cincinnya kelihatan
        ● Costs more than dry cell                           lebih cantik dan tahan kakisan. Apakah cara                    Table 1 Jadual 1
           Lebih mahal daripada sel kering                   terbaik untuk mendapat kesan ini?
                                                                                                              What is the potential difference of
                                                             A Dip the ring in oil.
    What is cell X?                                                                                           the metal pair Q and S?
© Navision (M) Sdn. Bhd. (690640-P)                                                44                                                    SULIT
SULIT

                          NAMA: _______________________________________________                                     TINGKATAN: ______________
   Lekat logo
    sekolah
     di sini               TOPICAL TEST 6: ELECTROCHEMISTRY
                           UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1
   Apakah perbezaan voltan bagi pasangan                               Diagram 12 Rajah 12                      A Z, Y and X
   logam Q dan S?                                                                                                  Z, Y dan X
                                                               Which of the following can give the
    A 0.5 V                C 1.8 V                                                                              B Y, X and Z
                                                               highest reading on the voltmeter?
    B 0.9 V                D 2.6 V                             Antara yang berikut, manakah boleh                  Y, X dan Z
                                                               menghasilkan bacaan voltan yang paling           C X, Y and Z
31 Diagram 11 shows the metal P is                             tinggi?                                             X, Y dan Z
   dropped into copper (II) sulphate                                                                            D X, Z and Y
                                                                     Electrode P          Electrode Q              X, Z dan Y
   solution.                                                          Elektrod P              Elektrod Q
    Rajah 11 menunjukkan logam P diletak ke
    dalam larutan kuprum (II) sulfat.                         A          Iron                   Lead         34 The arrangement of metals in the
                                                                         Besi                  Plumbum          electrochemical series is based on
                                                                                                                Susunan logam dalam siri elektrokimia
                                                              B         Silver                 Copper           adalah berdasarkan
                                                                       Argentum                 Kuprum          A their melting points.
                                                                                                                   takat lebur.
                                                              C        Copper                 Aluminium         B the nucleon number.
                                                                        Kuprum                Aluminium            nombor nukleon.
                                                                                                                C the tendency to be discharged.
                                                              D         Silver                  Lead               kecenderungan dinyahcas.
               Diagram 11 Rajah 11                                     Argentum                Plumbum
    Which of the following metals can                                                                           D the tendency to receive electrons.
                                                                                                                   kecenderungan menerima elektron.
    cause faster decolourisation of the                   33 Table 2 shows the information of
    solution?                                                two simple cells.                               35 Which of the following is not the
    Antara logam yang berikut, manakah boleh
    melunturkan warna larutan dengan paling
                                                               Jadual 2 menunjukkan maklumat bagi dua sel       example        of      electrochemical
                                                               ringkas.                                         industries in our daily life?
    cepat?
    A Aluminium                                                                                                 Antara yang berikut, manakah bukan contoh
                                                                                                                perindustrian elektrokimia dalam kehidupan
        Aluminium
                                                            Cell Electrode Potential Positive                   seharian kita?
    B Zinc
        Zink                                                Sel   Elektrod difference terminal                  A Voltaic cells are used in different
    C Sodium                                                                   (V)     Terminal                   devices      such     as     radio,
                                                                                   Perbezaan       positif        handphones, and others.
        Natrium
                                                                                   voltan (V)                      Sel voltan digunakan dalam pelbagai
    D Iron
                                                                                                                   peralatan seperti radio, telefon bimbit,
        Besi
                                                              I      X and Y            1.5          X             dan lain-lain.
                                                                     X dan Y                                    B Electroplating of iron can prevent
32 Diagram 12 shows the electrolysis of
                                                                                                                  it from corrosion.
   electrode P and Q.                                                Y and Z                                       Penyaduran besi boleh mencegah ia
    Rajah 12 menunjukkan elekrolisis bagi
                                                              II                        0.6          Z
                                                                      Y dan Z                                      daripada kakisan.
    elektrod P dan Q.
                                                                                                                C Chemical substance such as
                                                                                                                  chlorine is used to produce toxic
                                                                         Table 2 Jadual 2
                                                                                                                  solution.
                                                               Which of the following is the                       Bahan kimia seperti klorin diguna untuk
                                                               ascending order of electrode X, Y                   menghasil larutan bertoksik.
                                                               and Z in the electrochemical series?             D Extraction of useful metals such
                                                               Antara yang berikut, manakah ialah urutan          as aluminium using electrolysis.
                                                               menaik bagi elektrod X, Y dan Z dalam siri
                                                                                                                   Pengestrakan logam berguna seperti
                                                               elektrokimia?
                                                                                                                   aluminium dengan elektrolisis.




 PAPER 2 KERTAS 2
                                                                   SECTION A BAHAGIAN A




 1 Diagram 1 is the electrolysis of 0.001 mol dm –3
   hydrochloric acid.
    Rajah 1 ialah elektrolisis asid hidroklorik, 0.001 mol dm–3.




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                          UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1




                                                                                                            Diagram 2 Rajah 2
                                                                                     (a) What is the correct terminal for R and S in this
                                                                                         experiment?
                           Diagram 1 Rajah 1                                             Apakah terminal yang betul bagi R dan S dalam eksperimen ini?
                                                                         –3
                                                                                          _______________________________________________________
    (a) Write all the ions that present in 0.001 mol dm                                                                              [2 marks / 2 markah]
        hydrochloric acid.
         Tuliskan semua ion yang wujud dalam asid hidroklorik, 0.001 mol             (b) What is the suitable electrolyte that can be used in this
         dm–3.
         ________________________________________________________                        experiment?
                                                                                         Apakah elektrolit yang sesuai digunakan dalam eksperimen ini?
                                                  [1 mark / 1 markah]                    ________________________________________________________
    (b) What is the suitable plate that can be used in this                                                                           [1 mark / 1 markah]
        experiment?                                                                  (c) Write the equation of reaction happened in the anode
         Apakah kepingan yang sesuai digunakan dalam eksperimen ini?
         ________________________________________________________                        and cathode.
                                                                                         Tuliskan persamaan tindak balas yang berlaku di anod dan katod.
                                                    [1 mark / 1 markah]                  ________________________________________________________
                                                                                                                                    [2 marks / 2 markah]
    (c) Write the half equation for the reaction that occurs in
        anode and cathode.                                                           (d) What can be observed in the anode and cathode?
         Tuliskan persamaan setengah bagi tindak balas yang berlaku di anod              Apakah yang boleh diperhatikan di anod dan katod?
         dan katod.                                                                      ________________________________________________________
         ________________________________________________________
                                                                                                                                    [2 marks / 2 markah]
                                                    [2 marks / 2 markah]
                                                                                     (e) Name the process of this experiment and write the aim
    (d) Name the gases X and Y.
         Namakan gas X dan Y.                                                            of this experiment.
         ________________________________________________________                        Namakan proses bagi eksperimen ini dan tuliskan tujuan eksperimen.
                                                                                         ________________________________________________________
                                              [2 marks / 2 markah]
                                                                                                                                     [3 marks / 3 markah]
    (e) The experiment is repeated by changing the 0.001 mol
                                                                                   3 Diagram 3 shows a voltaic cell.
        dm–3 hydrochloric acid to a more concentrated                                Rajah 3 menunjukkan satu sel voltan.
        hydrochloric acid.
         Eksperimen diulang dengan menukarkan asid hidroklorik.
         0.001 mol dm–3 kepada asid hidroklorik yang lebih pekat.
          (i) What is the gas that will be collected in the anode?
                Apakah gas yang akan dikumpul di anod?
                                                    [1 mark / 1 markah]

         (ii) Explain why this gas produced in the anode.
                Jelaskan mengapa gas ini dihasilkan di anod.
                ___________________________________________________
                                                       [1 mark / 1 markah]
        (iii) Write the half equation that occur in the anode.
                Tuliskan persamaan setengah yang berlaku di anod.
                ___________________________________________________                                         Diagram 3 Rajah 3
                                                     [1 mark / 1 markah]
                                                                                     (a) Which electrode is the anode and cathode of the cell?
                                                                                         Elektrod yang manakah ialah anod dan katod dalam sel ini?
                                                                                          _______________________________________________________
 2 Diagram 2 shows the setup of apparatus to purify a key.                                                                           [1 mark / 1 markah]
    Rajah 2 menunjukkan susunan radas untuk menulenkan sebatang kunci.
                                                                                     (b) What is a salt bridge and its function in this experiment?
                                                                                         Apakah titian garam dan fungsinya dalam eksperimen ini?
                                                                                         ________________________________________________________
                                                                                                                                    [2 marks / 2 markah]




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                              UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1
    (c) What can be observed on the zinc electrode and why?                                             Diagram 4 Rajah 4
         Apakah yang boleh diperhatikan pada elektrod zink dan mengapa?           (a) How is the flow of electrons in this experiment?
         ________________________________________________________                     Bagaimanakah pengaliran elektron dalam eksperimen ini?
                                                    [2 marks / 2 markah]               _______________________________________________________
    (d) Write an equation for the reaction that takes place in                                                                   [1 mark / 1 markah]
        zinc and iron electrode.
         Tuliskan persamaan bagi tindak balas yang mengambil bahagian di          (b) Write three observations from this experiment.
         elektrod zink dan besi.                                                      Tuliskan tiga pemerhatian daripada eksperimen ini.
         ________________________________________________________                     ________________________________________________________
                                                   [2 marks / 2 markah]                                                          [3 marks / 3 markah]

    (e) What is the conversion energy that takes place in the                     (c) Write the equations that happened in the zinc and
        cell?                                                                         copper plate.
         Apakah perubahan tenaga yang berlaku dalam sel?                              Tuliskan persamaan yang berlaku dalam kepingan zink dan kepingan
         ________________________________________________________                     kuprum.
                                                   [1 mark / 1 markah]                ________________________________________________________
                                                                                                                                [2 marks / 2 markah]
    (f) What will happen to the cell voltage if iron electrode is
        replaced by silver electrode?                                             (d) Write an overall equation of this experiment.
                                                                                      Tuliskan satu persamaan keseluruhan bagi eksperimen ini.
         Apakah yang akan terjadi terhadap voltan sel jika elektrod besi
                                                                                      ________________________________________________________
         digantikan dengan elektrod argentum?
         ________________________________________________________                                                                 [1 mark / 1 markah]
                                                  [1 mark / 1 markah]
                                                                                  (e) What will happen if zinc plate is replaced by
 4 Diagram 4 shows a cell made by zinc and copper plates.                             magnesium plate? Why?
    Rajah 4 menunjukkan satu sel yang diperbuat daripada kepingan zink dan            Apakah yang akan terjadi jika kepingan zink diganti dengan kepingan
    kepingan kuprum.                                                                  magnesium? Mengapa?
                                                                                      ________________________________________________________
                                                                                                                                  [2 marks / 2 markah]




                                                                 SECTION B BAHAGIAN B


5 (a) What is electrolysis?                                                             Lukis satu rajah dengan label untuk menunjukkan elektrolisis
         Apakah elektrolisis?                                                           larutan akueus kuprum (II) klorida.
                                                      [1 mark / 1 markah]                                                    [5 marks / 5 markah]

    (b) Explain and give an example of the following terms.                        (d) Explain by giving chemical equation and the
         Jelas dan beri satu contoh bagi istilah yang berikut.                         observation from this diagram.
                                                                                        Jelaskan dengan memberi persamaan kimia dan pemerhatian
          (i) Electrolyte.                                                              daripada rajah itu.
                Elektrolit.
                                                                                                                           [7 marks / 7 markah]
                                                     [4 marks / 4 markah]
                                                                                   (e) List three factors that determine the type of ions to be
         (ii) Non-electrolyte
                Bukan elektrolit.                                                      discharged at the electrodes.
                                                                                        Senaraikan tiga faktor yang menentukan jenis ion yang dinyahcas
                                                     [5 marks / 5 markah]               pada elektrod.

    (c) Draw a labelled diagram to show the electrolysis of an                                                                  [3 marks / 3 markah]
        aqueous copper (II) chloride solution.



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                           UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1

                                                                    SECTION C BAHAGIAN C



 6 Diagram 5 shows the arrangement of particles in lead (II)                             (c) Why lead (II) chloride only conducts electricity in state
   chloride.                                                                                 B but not state A?
    Rajah 5 menunjukkan susunan zarah dalam plumbum (II) klorida.                            Mengapakah plumbum (II) klorida hanya mengalirkan elektrik dalam
                                                                                             keadaan B tetapi bukan keadaan A?
                                                                                                                                     [4 marks / 4 markah]

                                                                                         (d) Draw a labelled diagram of apparatus in the electrolysis
                            Diagram 5 Rajah 5                                                of molten lead (II) chloride.
                                                                                             Lukis satu rajah dengan label bagi susunan radas dalam elektrolisis
    (a) What is the state of lead (II) chloride in A and B?                                  leburan plumbum (II) klorida.
         Apakah keadaan bagi plumbum (II) klorida dalam A dan B?
                                                                                                                                        [6 marks / 6 markah]
                                                   [2 marks / 2 markah]
                                                                                         (e) Describe the electrolysis process that occurs in molten
    (b) How to convert lead (II) chloride from state A to B?
         Bagaimanakah menukar keadaan plumbum (II) klorida keadaan A ke
                                                                                             lead (II) chloride.
         B?                                                                                  Huraikan proses elektrolisis yang berlaku dalam leburan plumbum
                                                                                             (II) klorida.
                                                 [1 mark / 1 markah]
                                                                                                                                        [7 marks / 7 markah]




                                                                 SECTION A BAHAGIAN A
 PAPER 3 KERTAS 3




 1 An experiment was carried out using copper metal as
   positive electrode and copper (II) sulphate solution as
   electrolyte. Diagram 1.1 shows the apparatus set-up for an
   experiment of chemical cell to measure the potential
   difference between electrode copper metal and iron metal.
   The experiment was repeated with magnesium metal and
   aluminium to replace the iron metal.
    Satu eksperimen dijalankan dengan menggunakan logam kuprum sebagai
    elektrod positif dan larutan kuprum (II) sulfat sebagai elektrolit. Rajah 1.1
    menunjukkan susunan radas sel kimia untuk mengukur beza keupayaan di
    antara elektrod logam kuprum dan logam ferum. Eksperimen diulangi
    dengan menggantikan logam besi dengan logam magnesium dan
    aluminium.

                                                                                                             Diagram 1.1 Rajah 1.1




Diagram 1.2 shows the potential difference of three voltmeters A, B and C for different pairs of metals.
Rajah 1.2 menunjukkan tiga bacaan voltmeter A, B and C bagi pasangan-pasangan logam yang berbeza.




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                           UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1




                                                                   Diagram 1.2 Rajah 1.2



    (a) Record the potential difference for the pairs of metal in                                                                     [3 marks / 3 markah]
        the spaces provided in Diagram 1.2.
          Catatkan beza keupayaan bagi pasangan-pasangan logam dalam                   (h) Besides the changes in electrode, state other observation
          ruang yang disediakan di Rajah 1.2.                                              of this experiment.
                                                [3 marks / 3 markah]                       Selain daripada perubahan di elektrod, nyatakan pemerhatian bagi
                                                                                           eksperimen ini.
    (b) Construct a table using the data for this experiment.                                                                        [3 marks / 3 markah]
        Your table should include pairs of metals and potential
        difference.                                                                    (i) State the energy changes involved in this chemical cell.
          Binakan satu jadual dengan menggunakan maklumat daripada                         Nyatakan perubahan tenaga yang terlibat dalam sel kimia ini.
          eksperimen ini. Jadual anda haruslah mengandungi pasangan logam                                                             [3 marks / 3 markah]
          dan beza keupayaan.
                                                    [3 marks / 3 markah]               (j) Write one conclusion for this experiment.
                                                                                           Tuliskan satu kesimpulan bagi eksperimen ini.
    (c) State the hypothesis of the experiment.                                                                                       [3 marks / 3 markah]
          Nyatakan hipotesis bagi eksperimen ini.
                                                     [3 marks / 3 markah]

    (d) State the variables following:                                              2 Electroplating is a process of coating a thin protective layer
          Nyatakan pemboleh ubah berikut:
            (i) Manipulated variable:                                                 to the metals that easily corrode. This process is highly used
                Pemboleh ubah dimanipulasikan:                                        in manufacturing artificial jewellery.
                                                                                       Penyaduran elektrik merupakan proses penyalutan satu lapisan pelindung
           (ii) Responding variable:                                                   yang nipis ke atas logam-logam yang mudah terkakis. Proses ini banyak
                Pemboleh ubah bergerak balas:
                                                                                       digunakan dalam pembuatan permata tiruan.
          (iii) Constant variable:
                Pemboleh ubah dimalarkan:
                                                     [3 marks / 3 markah]              Plan an experiment to study how to electroplate iron metal
                                                                                       with gold.
    (e)     (i) What could be observed in iron electrode?                              Rancangkan satu eksperimen untuk         mengkaji    bagaimana     untuk
                Apakah yang boleh diperhatikan pada elektrod ferum?                    menyadurkan logam ferum dengan emas.
                                                    [3 marks / 3 markah]
           (ii) Explain your answer in (d) (i).                                        Your planning should include the following aspects:
                Terangkan jawapan anda di (d) (i).                                     Rancangan anda hendaklah mengandungi aspek-aspek berikut:
                                        [3 marks / 3 markah]                           (a) Aim of experiment.
                                                                                           Tujuan eksperimen.
    (f) Arrange Cu, Fe, Mg and Al metals ascending order in
        the electrochemical series.                                                    (b) Statement of hypothesis.
                                                                                           Pernyataan hipotesis.
          Susunkan keempat-empat logam, Cu, Fe, Mg dan Al dalam siri
          elektrokimia mengikut tertib menaik.                                         (c) List of materials and apparatus.
                                                [3 marks / 3 markah]                       Senarai bahan dan radas.
    (g) Metal K is less electropositive than magnesium and                             (d) Diagram for apparatus set-up.
                                                                                           Rajah bagi susunan radas.
        aluminium but more electropositive than copper and
                                                                                       (e) Procedure of experiment.
        iron. State where is the metal K located.                                          Prosedur eksperimen.
          Logam K kurang elektropositif daripada magnesium dan aluminium
          tetapi lebih elektropositif daripada kuprum dan ferum. Nyatakan di           (f) Tabulation of data.
          mana letaknya logam K.                                                           Penjadualan data.
                                                                                                                                    [17 marks / 17 markah]

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                        NAMA: _______________________________________________   TINGKATAN: ______________
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    sekolah
     di sini             TOPICAL TEST 6: ELECTROCHEMISTRY
                         UJIAN TOPIKAL 6: ELEKTROKIMIA

 PAPER 1 KERTAS 1




© Navision (M) Sdn. Bhd. (690640-P)                        50                                SULIT

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Chemistry form 4 topical question 6

  • 1. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 1 Which of the following is true about B Solid sodium chloride contains electrolysis of molten magnesium an electrolyte? atoms while molten sodium chloride? Antara yang berikut, manakah benar tentang chloride contains ions. Antara yang berikut, manakah menunjukkan elektrolit? Pepejal natrium klorida mengandungi persamaan setengah di katod dalam I Electrolyte conducts electricity in atom manakala leburan natrium klorida elektrolisis leburan magnesium klorida? molten state. mengandungi ion. A 2Cl () → Cl2 () + 2e Elektrolit mengalirkan elektrik dalam C Solid sodium chloride contains 2Cl (ce) → Cl2 (ce) + 2e keadaan leburan. molecules while molten sodium B 2H+ (aq) + 2e → H2 (g) II Electrolyte conducts electricity in chloride contains ions. 2H+ (ak) + 2e → H2 (g) solid state. Pepejal natrium klorida mengandungi C Mg2+ () + 2e → Mg (s) Elektrolit mengalirkan elektrik dalam molekul manakala leburan natrium Mg2+ (ce) + 2e → Mg (p) keadaan pepejal. klorida mengandungi ion. D 4OH– (aq) → 2H2O () + O2 (g) + 4e III Electrolyte is soluble in water. D Solid sodium chloride contains 4OH– (ak) + 2H2O (ce) + O2 (g) + 4e Elektrolit larut dalam air. atoms while molten sodium IV Electrolyte undergoes chemical chloride contains molecules. 8 Which of the following happens decomposition when it conducts Pepejal natrium klorida mengandungi during the electrolysis of molten electricity. atom manakala leburan natrium klorida mengandungi molekul. sodium bromide? Elektrolit mengalami penguraian kimia Antara yang berikut, manakah akan berlaku semasa mengalirkan elektrik. semasa elektrolisis leburan natrium bromida? A I and II only C II and IV only 5 Diagram 1 shows the apparatus set- I Sodium ions are attracted to the I dan II sahaja II dan IV sahaja up of an experiment. cathode. B II and III only D I and IV only Rajah 1 menunjukkan susunan radas bagi Ion natrium tertarik ke katod. II dan III sahaja I dan IV sahaja satu eksperimen. II Bromide ions are attracted to the 2 Which of the following is not an anode. Ion bromida tertarik ke anod. electrolyte? Antara yang berikut, manakah bukan III Electrons are moving from anode elektrolit? to cathode. A Molten glucose Elektron bergerak dari anod ke katod. Leburan glukosa IV At the cathode, bromine ions B Aqueous ammonia accept electron from anode. Akueus ammonia Di katod, ion bromin menerima elektron C Molten lead (II) bromide dari anod. Diagram 1 Rajah 1 Leburan plumbum (II) bromida A I, II and III only Which of the following is most I, II dan III sahaja D Molten potassium iodide Leburan kalium iodida probably substance X? B I, II and IV only Antara yang berikut, manakah I, II dan IV sahaja berkemungkinan besar ialah bahan X? 3 Naphthalene does not conduct C I, III and IV only A Molten napthalene I, III dan IV sahaja electricity because it Leburan naftalena Naftalena tidak mengalirkan elektrik kerana D II, III and IV only B Pure ethanol II, III dan IV sahaja A contains freely moving electrons. Etanol tulen mengandungi elektron yang bergerak C Solid lead (II) bromide bebas. Pepejal plumbum (II) bromida 9 Which of the following is true about B has very low melting points. D Potassium iodide solution the process that takes place in the mempunyai takat lebur yang sangat Larutan kalium iodida electrolysis of molten copper (II) rendah. bromide? C consists of molecules which are Antara yang berikut, manakah benar tentang 6 What are the ions present in molten uncharged particles. proses yang mengambil bahagian dalam terdiri dariapda molekul-molekul di mana lead (II) bromide? elektrolisis leburan kuprum (II) bromida? ialah zarah-zarah tidak bercas. Apakah ion-ion yang hadir dalam leburan plumbum (II) bromida? Anode Cathode D contains ionic compounds which Anod Katod A PbBr2 can dissolve in water. PbBr2 mengandungi sebatian ion yang boleh B Pb and Br A O2 H2 larut dalam air. Pb dan Br Br2 H2 B C Pb2+ and Br– 4 Which of the following is true about Pb2+ dan Br– C O2 Cu the particles present in solid and D Pb2+ and Br2– molten sodium chloride? Pb2+ dan Br2– D Br2 Cu Antara yang berikut, manakah benar tentang zarah-zarah yang hadir dalam pepejal dan leburan natrium klorida? 10 Diagram 2 shows the arrangement of A Both solid and molten sodium apparatus for electrolysis of iron chloride contain ions. 7 Which of the following shows the (III) nitrate solution. Kedua-dua pepejal dan leburan natrium half equation at the cathode in the Rajah 2 menunjukkan susunan radas bagi klorida mengandungi ion-ion. elektrolisis larutan ferum (III) nitrat. © Navision (M) Sdn. Bhd. (690640-P) 41 SULIT
  • 2. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 II Concentration of ions in the solution. Kepekatan ion dalam larutan. III The molecular mass of the atom used. Jisim molekul bagi atom yang digunakan. IV Position of ions in electrochemical series. Kedudukan ion dalam siri elektrokimia. A I, II and III only I, II dan III sahaja B I, II and IV only Diagram 2 Rajah 2 Diagram 3 Rajah 3 I, II dan IV sahaja What is formed at carbon electrode Q? What need to be changed in order to C I, III and IV only Apakah yang terbentuk di elektrod karbon Q? get different gas from this I, III dan IV sahaja A Hydrogen gas experiment? D II, III and IV only Gas hidrogen Apakah yang perlu diubah supaya mendapat II, III dan IV sahaja B Oxygen gas gas yang berbeza daripada eksperimen ini? Gas oksigen A Substitute carbon electrodes with 16 Diagram 4 shows the set-up of the C Iron metal copper electrodes. apparatus used to electroplate an Logam besi Gantikan elektrod karbon dengan iron key with silver. D Nitrogen gas elektrod kuprum. Rajah 4 menunjukkan susunan radas yang Gas nitrogen B Use a more concentrated copper digunakan untuk menyadur kunci besi dengan (II) chloride solution. argentum. 11 What are the ions that present in Gunakan larutan kuprum (II) klorida yang lebih pekat. dilute copper (II) chloride solution? Apakah ion-ion yang wujud dalam larutan C Change the position of the kuprum (II) klorida cair? battery. A Cu2+ and Cl– Tukarkan kedudukan bateri. Cu2+ dan Cl– D Substitute carbon electrodes with B Cu2+, Cl– and H2O platinum. Cu2+, Cl– dan H2O Gantikan elektrod karbon dengan C Cu2+, H+, Cl– and OH– platinum. Cu2+, H+, Cl– dan OH– D Cu2+, H+, Cl– and H2O 14 Which of the following is the true Cu2+, H+, Cl– dan H2O reactions taking place during the Diagram 4 Rajah 4 electrolysis of dilute copper (II) 12 The electrolysis of aqueous sodium What is the observation after 30 sulphate solution using carbon as the nitrate using carbon electrode was minutes? electrodes? Apakah pemerhatian selepas 30 minit? carried out in a lab. Which of the Antara yang berikut, manakah benar tentang following is true about this tindak balas yang mengambil bahagian I At anode, silver foil become experiment? semasa elektrolisis larutan kuprum (II) sulfat thinner. cair dengan menggunakan karbon sebagai Di anod, foil argentum menjadi lebih Elektrolisis akueus natrium nitrat elektrod? nipis. menggunakan elektrod karbon dijalankan dalam makmal. Antara yang berikut, Anode Cathode II At anode, shinny grey deposits manakah benar tentang eksperimen ini? Anod Katod are formed. A The sodium ions are discharged Di anod, enapan kelabu berkilat A SO42–→ Cu2+ + 2e → Cu terbentuk. at the cathode. Ion natrium dinyahcaskan di katod. S + 2O2 + 2e III At cathode, gas bubbles are B The nitrate ions are discharged at released. B 4OH– → Cu2+ + 2e → Cu Di katod, gelembung gas dibebaskan. the anode. 2H2O + O2 + 4e Ion nitrat dinyahcaskan di anod. IV At cathode, shinny grey deposits C Hydrogen gas is produced in the C SO42– → 2H+ + 2e → H2 are formed. anode. S + 2O2 + 2e Di katod, enapan kelabu berkilat terbentuk. Gas hidrogen dihasilkan di anod. D 4OH → – 2H + 2e → H2 + D Oxygen gas is produced in the A I and II only 2H2O + O2 + 4e I dan II sahaja anode. B II and III only Gas oksigen dihasilkan di anod. 15 Which of the following are the factors II dan III sahaja that determine the type of ions to be C II and IV only 13 Diagram 3 shows an apparatus set- II dan IV sahaja up for an electrolysis process. discharged at the electrodes? Antara yang berikut, manakah ialah faktor D I and IV only Rajah 3 menunjukkan susunan radas bagi yang menentukan jenis ion yang dinyahcas di I dan IV sahaja satu proses elektrolisis. elektrod? I Type of electrode used. Jenis elektrod yang diguna. © Navision (M) Sdn. Bhd. (690640-P) 42 SULIT
  • 3. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 17 Information below shows the main B Change aqueous nickel nitrate to Besi Kuprum aim of process X. concentrated nickel nitrate Maklumat di bawah menunjukkan tujuan solution. utama bagi proses X. Tukarkan akueus nikel nitrat kepada 22 Diagram 7 shows the set-up of the ● Prevent corrosion. larutan nikel nitrat pekat. apparatus of a simple voltaic cell. Mencegah kakisan C Replace the nickel electrode with Rajah 7 menunjukkan susunan radas bagi ● Improve the appearance. the carbon electrode. satu sel voltan ringkas. Memperbaiki rupa luaran. Gantikan elektrod nikel dengan elektrod karbon. What is process X? D Change the spoon to an iron key. Apakah proses X? Tukarkan sudu kepada kunci besi. A Electrolysis C Electroplating Elektrolisis Penyaduran 20 Which of the following shows the B Extraction D Wrapping Pengekstrakan Pembalutan equations that takes place in anode 18 Which of the following is true about and cathode during the purification electroplating an iron key with of impure copper? Antara yang berikut, manakah menunjukkan copper? persamaan yang mengambil bahagian di Antara yang berikut, manakah benar tentang anod dan katod semasa penulenan kuprum penyaduran kunci besi dengan kuprum? tidak tulen? Diagram 7 Rajah 7 Anode Cathode Electrolyte Which of the following is true about Anod Katod solution Anode Cathode the voltaic cell? Larutan Anod Katod Antara yang berikut, manakah benar tentang elektrolit sel voltan? A Cu2+ + 2e → Cu Cu → Cu2+ + 2e A Copper AgNO3 I The copper plate dissolves Iron key gradually. Kunci besi rod solution B Cu → Cu2+ + 2e Cu2+ + 2e → Cu Rod kuprum Larutan AgNO3 Kepingan kuprum terlarut sedikit demi sedikit. B Copper AgNO3 C – 2H+ + 2e → H2 4OH → II The zinc plate acts as negative Iron key 2H2O + O2 + 4e terminal. rod Kunci besi solution Rod kuprum Larutan AgNO3 Kepingan zink bertindak sebagai terminal D 4OH– → 2H+ + 2e → H2 negatif. 2H2O + O2 + 4e III The zinc plate become thinner. C Copper CuSO4 Iron key Kepingan zink menjadi nipis. Kunci besi rod solution IV Electrons flow from zinc plate to Rod kuprum Larutan CuSO4 21 Diagram 6 shows the set-up of the apparatus of a simple chemical cell. copper plate. Rajah 6 menunjukkan susunan radas bagi Elekron mengalir dari kepingan zink ke D Copper CuSO4 kepingan kuprum. Iron key satu sel kimia ringkas. rod Kunci besi solution A I, II and III only Rod kuprum Larutan CuSO4 I, II dan III sahaja B I, II and IV only I, II dan IV sahaja 19 Diagram 5 shows the set-up of the C I, III and IV only apparatus used in an experiment. I, III dan IV sahaja Rajah 5 menunjukkan susunan radas yang D II, III and IV only digunakan dalam satu eksperimen. II, III dan IV sahaja 23 Diagram 8 shows the set-up of the apparatus of a certain voltaic cell. Diagram 6 Rajah 6 Rajah 8 menunjukkan susunan radas bagi What are metals P and Q? satu sel voltan tertentu. Apakah logam P dan Q? Metal P Metal Q Logam P Logam Q A Lead Magnesium Plumbum Magnesium Diagram 5 Rajah 5 What change would you make so B Zinc Aluminium that the experiment is successful? Zink Aluminium Apakah perubahan yang anda perlu buat supaya eksperimen ini berjaya? C Magnesium Copper A The terminal of the batteries are Magnesium Kuprum reversed. Terbalikkan terminal bateri. Diagram 8 Rajah 8 D Iron Copper © Navision (M) Sdn. Bhd. (690640-P) 43 SULIT
  • 4. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 Which of the following changes can Apakah sel X? Celupkan cincin dalam minyak. increase the reading on the A Daniell cell C Alkaline cell B Wash the ring with soap. Sel Daniell Sel alkali Cucikan cincin dengan sabun. voltmeter? Antara perubahan yang berikut, manakah B Mercury cell D Nickel cell C Plate the ring with gold. boleh menaikkan bacaan voltmeter? Sel merkuri Sel nikel Sadurkan cincin dengan emas. A Use a more concentrated sodium D Polished the ring with water. 26 Diagram 9 shows a chemical cell. Gilapkan cincin dengan air. chloride. Gunakan larutan natrium klorida yang Rajah 9 menunjukkan satu sel kimia. lebih pekat. 29 Diagram 10 shows a chemical cell. B Change the zinc plate to Rajah 10 menunjukkan satu sel kimia. magnesium plate. Tukarkan kepingan zink kepada kepingan magnesium. C Change the copper plate to ledd plate. Tukarkan kepingan kuprum kepada kepingan plumbum. D Increase the volume of aqueous sodium chloride. Tambahkan isi padu akueus natrium klorida. Diagram 10 Rajah 10 24 Which of the following is correct Diagram 9 Rajah 9 Which of the following can get the between an electrolytic cell and What is the correct chemical highest reading on the voltmeter? voltaic cell? reaction that takes place in the Antara yang berikut, manakah boleh Antara yang berikut, manakah betul bagi sel memperoleh bacaan voltmeter yang paling elektrolisis dan sel voltan? positive terminal of the chemical tinggi? I Cathode is the negative terminal cell? Apakah tindak balas kimia yang betul yang Plat X Plat Y in voltaic cell. mengambil bahagian di terminal positif Kepingan X Kepingan Y Katod ialah terminal negatif dalam sel dalam sel kimia? voltan. A Zn2+ + 2e → Zn A Zinc Magnesium Zink Magnesium B Zn → Zn2+ + 2e II Electrons flow from anode to the C Ag+ + e → Ag B Zinc Copper cathode in electrolytic cell. Elektron mengalir dari anod ke katod D Ag → Ag+ + e Zink Kuprum dalam sel elektrolisis. C Magnesium Copper III Anion is attracted to the anode in Magnesium Kuprum the electrolytic cell. Anion tertarik ke anod dalam sel 27 Which of the following is true about D Magnesium Silver elektrolisis. Magnesium Argentum the advantages of the dry cell? IV Graphite is not use as electrodes Antara yang berikut, manakah benar tentang in the voltaic cell. kelebihan sel kering? Grafit tidak digunakan sebagai elektrod I Cheap dalam sel voltan. Murah A I, II and III only II Easy to be carried I, II dan III sahaja Mudah dibawa 30 Table 1 shows the information about B I, II and IV only III Can be recharged three simple cells. I, II dan IV sahaja Boleh dicas semula Jadual 1 menunjukkan maklumat tentang tiga C I, III and IV only IV Available in different size sel ringkas. I, III dan IV sahaja Terdapat pelbagai saiz Metal Potential Positive D II, III and IV only A I, II and III only II, III dan IV sahaja pairs difference (V) terminal I, II dan III sahaja Pasangan Beza keupayaan Terminal B I, II and IV only logam (V) positif 25 Information below shows the I, II dan IV sahaja description of cell X. C I, III and IV only Maklumat di bawah menunjukkan huraian I, III dan IV sahaja P and Q 1.3 P tentang sel X. D II, III and IV only P dan Q II, III dan IV sahaja ● Portable P and R Mudah alih 2.1 P P dan R ● Stable voltage 28 Jane wants to make her ring more Voltan stabil beautiful and prevent corrosion. R and S ● Not rechargeable 1.8 R What is the best way to achieve this? R dan S Tidak boleh dicas semula Jane hendak menjadikan cincinnya kelihatan ● Costs more than dry cell lebih cantik dan tahan kakisan. Apakah cara Table 1 Jadual 1 Lebih mahal daripada sel kering terbaik untuk mendapat kesan ini? What is the potential difference of A Dip the ring in oil. What is cell X? the metal pair Q and S? © Navision (M) Sdn. Bhd. (690640-P) 44 SULIT
  • 5. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 Apakah perbezaan voltan bagi pasangan Diagram 12 Rajah 12 A Z, Y and X logam Q dan S? Z, Y dan X Which of the following can give the A 0.5 V C 1.8 V B Y, X and Z highest reading on the voltmeter? B 0.9 V D 2.6 V Antara yang berikut, manakah boleh Y, X dan Z menghasilkan bacaan voltan yang paling C X, Y and Z 31 Diagram 11 shows the metal P is tinggi? X, Y dan Z dropped into copper (II) sulphate D X, Z and Y Electrode P Electrode Q X, Z dan Y solution. Elektrod P Elektrod Q Rajah 11 menunjukkan logam P diletak ke dalam larutan kuprum (II) sulfat. A Iron Lead 34 The arrangement of metals in the Besi Plumbum electrochemical series is based on Susunan logam dalam siri elektrokimia B Silver Copper adalah berdasarkan Argentum Kuprum A their melting points. takat lebur. C Copper Aluminium B the nucleon number. Kuprum Aluminium nombor nukleon. C the tendency to be discharged. D Silver Lead kecenderungan dinyahcas. Diagram 11 Rajah 11 Argentum Plumbum Which of the following metals can D the tendency to receive electrons. kecenderungan menerima elektron. cause faster decolourisation of the 33 Table 2 shows the information of solution? two simple cells. 35 Which of the following is not the Antara logam yang berikut, manakah boleh melunturkan warna larutan dengan paling Jadual 2 menunjukkan maklumat bagi dua sel example of electrochemical ringkas. industries in our daily life? cepat? A Aluminium Antara yang berikut, manakah bukan contoh perindustrian elektrokimia dalam kehidupan Aluminium Cell Electrode Potential Positive seharian kita? B Zinc Zink Sel Elektrod difference terminal A Voltaic cells are used in different C Sodium (V) Terminal devices such as radio, Perbezaan positif handphones, and others. Natrium voltan (V) Sel voltan digunakan dalam pelbagai D Iron peralatan seperti radio, telefon bimbit, Besi I X and Y 1.5 X dan lain-lain. X dan Y B Electroplating of iron can prevent 32 Diagram 12 shows the electrolysis of it from corrosion. electrode P and Q. Y and Z Penyaduran besi boleh mencegah ia Rajah 12 menunjukkan elekrolisis bagi II 0.6 Z Y dan Z daripada kakisan. elektrod P dan Q. C Chemical substance such as chlorine is used to produce toxic Table 2 Jadual 2 solution. Which of the following is the Bahan kimia seperti klorin diguna untuk ascending order of electrode X, Y menghasil larutan bertoksik. and Z in the electrochemical series? D Extraction of useful metals such Antara yang berikut, manakah ialah urutan as aluminium using electrolysis. menaik bagi elektrod X, Y dan Z dalam siri Pengestrakan logam berguna seperti elektrokimia? aluminium dengan elektrolisis. PAPER 2 KERTAS 2 SECTION A BAHAGIAN A 1 Diagram 1 is the electrolysis of 0.001 mol dm –3 hydrochloric acid. Rajah 1 ialah elektrolisis asid hidroklorik, 0.001 mol dm–3. © Navision (M) Sdn. Bhd. (690640-P) 45 SULIT
  • 6. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 Diagram 2 Rajah 2 (a) What is the correct terminal for R and S in this experiment? Diagram 1 Rajah 1 Apakah terminal yang betul bagi R dan S dalam eksperimen ini? –3 _______________________________________________________ (a) Write all the ions that present in 0.001 mol dm [2 marks / 2 markah] hydrochloric acid. Tuliskan semua ion yang wujud dalam asid hidroklorik, 0.001 mol (b) What is the suitable electrolyte that can be used in this dm–3. ________________________________________________________ experiment? Apakah elektrolit yang sesuai digunakan dalam eksperimen ini? [1 mark / 1 markah] ________________________________________________________ (b) What is the suitable plate that can be used in this [1 mark / 1 markah] experiment? (c) Write the equation of reaction happened in the anode Apakah kepingan yang sesuai digunakan dalam eksperimen ini? ________________________________________________________ and cathode. Tuliskan persamaan tindak balas yang berlaku di anod dan katod. [1 mark / 1 markah] ________________________________________________________ [2 marks / 2 markah] (c) Write the half equation for the reaction that occurs in anode and cathode. (d) What can be observed in the anode and cathode? Tuliskan persamaan setengah bagi tindak balas yang berlaku di anod Apakah yang boleh diperhatikan di anod dan katod? dan katod. ________________________________________________________ ________________________________________________________ [2 marks / 2 markah] [2 marks / 2 markah] (e) Name the process of this experiment and write the aim (d) Name the gases X and Y. Namakan gas X dan Y. of this experiment. ________________________________________________________ Namakan proses bagi eksperimen ini dan tuliskan tujuan eksperimen. ________________________________________________________ [2 marks / 2 markah] [3 marks / 3 markah] (e) The experiment is repeated by changing the 0.001 mol 3 Diagram 3 shows a voltaic cell. dm–3 hydrochloric acid to a more concentrated Rajah 3 menunjukkan satu sel voltan. hydrochloric acid. Eksperimen diulang dengan menukarkan asid hidroklorik. 0.001 mol dm–3 kepada asid hidroklorik yang lebih pekat. (i) What is the gas that will be collected in the anode? Apakah gas yang akan dikumpul di anod? [1 mark / 1 markah] (ii) Explain why this gas produced in the anode. Jelaskan mengapa gas ini dihasilkan di anod. ___________________________________________________ [1 mark / 1 markah] (iii) Write the half equation that occur in the anode. Tuliskan persamaan setengah yang berlaku di anod. ___________________________________________________ Diagram 3 Rajah 3 [1 mark / 1 markah] (a) Which electrode is the anode and cathode of the cell? Elektrod yang manakah ialah anod dan katod dalam sel ini? _______________________________________________________ 2 Diagram 2 shows the setup of apparatus to purify a key. [1 mark / 1 markah] Rajah 2 menunjukkan susunan radas untuk menulenkan sebatang kunci. (b) What is a salt bridge and its function in this experiment? Apakah titian garam dan fungsinya dalam eksperimen ini? ________________________________________________________ [2 marks / 2 markah] © Navision (M) Sdn. Bhd. (690640-P) 46 SULIT
  • 7. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 (c) What can be observed on the zinc electrode and why? Diagram 4 Rajah 4 Apakah yang boleh diperhatikan pada elektrod zink dan mengapa? (a) How is the flow of electrons in this experiment? ________________________________________________________ Bagaimanakah pengaliran elektron dalam eksperimen ini? [2 marks / 2 markah] _______________________________________________________ (d) Write an equation for the reaction that takes place in [1 mark / 1 markah] zinc and iron electrode. Tuliskan persamaan bagi tindak balas yang mengambil bahagian di (b) Write three observations from this experiment. elektrod zink dan besi. Tuliskan tiga pemerhatian daripada eksperimen ini. ________________________________________________________ ________________________________________________________ [2 marks / 2 markah] [3 marks / 3 markah] (e) What is the conversion energy that takes place in the (c) Write the equations that happened in the zinc and cell? copper plate. Apakah perubahan tenaga yang berlaku dalam sel? Tuliskan persamaan yang berlaku dalam kepingan zink dan kepingan ________________________________________________________ kuprum. [1 mark / 1 markah] ________________________________________________________ [2 marks / 2 markah] (f) What will happen to the cell voltage if iron electrode is replaced by silver electrode? (d) Write an overall equation of this experiment. Tuliskan satu persamaan keseluruhan bagi eksperimen ini. Apakah yang akan terjadi terhadap voltan sel jika elektrod besi ________________________________________________________ digantikan dengan elektrod argentum? ________________________________________________________ [1 mark / 1 markah] [1 mark / 1 markah] (e) What will happen if zinc plate is replaced by 4 Diagram 4 shows a cell made by zinc and copper plates. magnesium plate? Why? Rajah 4 menunjukkan satu sel yang diperbuat daripada kepingan zink dan Apakah yang akan terjadi jika kepingan zink diganti dengan kepingan kepingan kuprum. magnesium? Mengapa? ________________________________________________________ [2 marks / 2 markah] SECTION B BAHAGIAN B 5 (a) What is electrolysis? Lukis satu rajah dengan label untuk menunjukkan elektrolisis Apakah elektrolisis? larutan akueus kuprum (II) klorida. [1 mark / 1 markah] [5 marks / 5 markah] (b) Explain and give an example of the following terms. (d) Explain by giving chemical equation and the Jelas dan beri satu contoh bagi istilah yang berikut. observation from this diagram. Jelaskan dengan memberi persamaan kimia dan pemerhatian (i) Electrolyte. daripada rajah itu. Elektrolit. [7 marks / 7 markah] [4 marks / 4 markah] (e) List three factors that determine the type of ions to be (ii) Non-electrolyte Bukan elektrolit. discharged at the electrodes. Senaraikan tiga faktor yang menentukan jenis ion yang dinyahcas [5 marks / 5 markah] pada elektrod. (c) Draw a labelled diagram to show the electrolysis of an [3 marks / 3 markah] aqueous copper (II) chloride solution. © Navision (M) Sdn. Bhd. (690640-P) 47 SULIT
  • 8. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 SECTION C BAHAGIAN C 6 Diagram 5 shows the arrangement of particles in lead (II) (c) Why lead (II) chloride only conducts electricity in state chloride. B but not state A? Rajah 5 menunjukkan susunan zarah dalam plumbum (II) klorida. Mengapakah plumbum (II) klorida hanya mengalirkan elektrik dalam keadaan B tetapi bukan keadaan A? [4 marks / 4 markah] (d) Draw a labelled diagram of apparatus in the electrolysis Diagram 5 Rajah 5 of molten lead (II) chloride. Lukis satu rajah dengan label bagi susunan radas dalam elektrolisis (a) What is the state of lead (II) chloride in A and B? leburan plumbum (II) klorida. Apakah keadaan bagi plumbum (II) klorida dalam A dan B? [6 marks / 6 markah] [2 marks / 2 markah] (e) Describe the electrolysis process that occurs in molten (b) How to convert lead (II) chloride from state A to B? Bagaimanakah menukar keadaan plumbum (II) klorida keadaan A ke lead (II) chloride. B? Huraikan proses elektrolisis yang berlaku dalam leburan plumbum (II) klorida. [1 mark / 1 markah] [7 marks / 7 markah] SECTION A BAHAGIAN A PAPER 3 KERTAS 3 1 An experiment was carried out using copper metal as positive electrode and copper (II) sulphate solution as electrolyte. Diagram 1.1 shows the apparatus set-up for an experiment of chemical cell to measure the potential difference between electrode copper metal and iron metal. The experiment was repeated with magnesium metal and aluminium to replace the iron metal. Satu eksperimen dijalankan dengan menggunakan logam kuprum sebagai elektrod positif dan larutan kuprum (II) sulfat sebagai elektrolit. Rajah 1.1 menunjukkan susunan radas sel kimia untuk mengukur beza keupayaan di antara elektrod logam kuprum dan logam ferum. Eksperimen diulangi dengan menggantikan logam besi dengan logam magnesium dan aluminium. Diagram 1.1 Rajah 1.1 Diagram 1.2 shows the potential difference of three voltmeters A, B and C for different pairs of metals. Rajah 1.2 menunjukkan tiga bacaan voltmeter A, B and C bagi pasangan-pasangan logam yang berbeza. © Navision (M) Sdn. Bhd. (690640-P) 48 SULIT
  • 9. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 Diagram 1.2 Rajah 1.2 (a) Record the potential difference for the pairs of metal in [3 marks / 3 markah] the spaces provided in Diagram 1.2. Catatkan beza keupayaan bagi pasangan-pasangan logam dalam (h) Besides the changes in electrode, state other observation ruang yang disediakan di Rajah 1.2. of this experiment. [3 marks / 3 markah] Selain daripada perubahan di elektrod, nyatakan pemerhatian bagi eksperimen ini. (b) Construct a table using the data for this experiment. [3 marks / 3 markah] Your table should include pairs of metals and potential difference. (i) State the energy changes involved in this chemical cell. Binakan satu jadual dengan menggunakan maklumat daripada Nyatakan perubahan tenaga yang terlibat dalam sel kimia ini. eksperimen ini. Jadual anda haruslah mengandungi pasangan logam [3 marks / 3 markah] dan beza keupayaan. [3 marks / 3 markah] (j) Write one conclusion for this experiment. Tuliskan satu kesimpulan bagi eksperimen ini. (c) State the hypothesis of the experiment. [3 marks / 3 markah] Nyatakan hipotesis bagi eksperimen ini. [3 marks / 3 markah] (d) State the variables following: 2 Electroplating is a process of coating a thin protective layer Nyatakan pemboleh ubah berikut: (i) Manipulated variable: to the metals that easily corrode. This process is highly used Pemboleh ubah dimanipulasikan: in manufacturing artificial jewellery. Penyaduran elektrik merupakan proses penyalutan satu lapisan pelindung (ii) Responding variable: yang nipis ke atas logam-logam yang mudah terkakis. Proses ini banyak Pemboleh ubah bergerak balas: digunakan dalam pembuatan permata tiruan. (iii) Constant variable: Pemboleh ubah dimalarkan: [3 marks / 3 markah] Plan an experiment to study how to electroplate iron metal with gold. (e) (i) What could be observed in iron electrode? Rancangkan satu eksperimen untuk mengkaji bagaimana untuk Apakah yang boleh diperhatikan pada elektrod ferum? menyadurkan logam ferum dengan emas. [3 marks / 3 markah] (ii) Explain your answer in (d) (i). Your planning should include the following aspects: Terangkan jawapan anda di (d) (i). Rancangan anda hendaklah mengandungi aspek-aspek berikut: [3 marks / 3 markah] (a) Aim of experiment. Tujuan eksperimen. (f) Arrange Cu, Fe, Mg and Al metals ascending order in the electrochemical series. (b) Statement of hypothesis. Pernyataan hipotesis. Susunkan keempat-empat logam, Cu, Fe, Mg dan Al dalam siri elektrokimia mengikut tertib menaik. (c) List of materials and apparatus. [3 marks / 3 markah] Senarai bahan dan radas. (g) Metal K is less electropositive than magnesium and (d) Diagram for apparatus set-up. Rajah bagi susunan radas. aluminium but more electropositive than copper and (e) Procedure of experiment. iron. State where is the metal K located. Prosedur eksperimen. Logam K kurang elektropositif daripada magnesium dan aluminium tetapi lebih elektropositif daripada kuprum dan ferum. Nyatakan di (f) Tabulation of data. mana letaknya logam K. Penjadualan data. [17 marks / 17 markah] © Navision (M) Sdn. Bhd. (690640-P) 49 SULIT
  • 10. SULIT NAMA: _______________________________________________ TINGKATAN: ______________ Lekat logo sekolah di sini TOPICAL TEST 6: ELECTROCHEMISTRY UJIAN TOPIKAL 6: ELEKTROKIMIA PAPER 1 KERTAS 1 © Navision (M) Sdn. Bhd. (690640-P) 50 SULIT