Kimia paper 2 f4(Finish)

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    SECTION A [60 marks]BAHAGIAN A [60 markah]

    1 Diagram 1 shows an apparatus set-up for an experiment.Rajah 1 menunjukkan susunan radas untuk satu eksperimen.

    Diagram 1

    When 15.5 g of copper (II) carbonate is heated strongly, the green powder changes to black

    powder and released a colourless gas which turns lime water becomes cloudy.Apabila 15.5 g kuprum (II) karbonat dipanaskan dengan kuat, serbuk hijau bertukar kepada serbuk hitam dan

    membebaskan satu gas tidak berwarna yang menukarkan air kapur menjadi keruh.

    (a) Identify the black powder and the colourless gas.Kenal pastikan serbuk hitam dan gas tidak berwarna.

    (i) Black powder:Serbuk hitam:

    ___________________________________________________

    (ii) Colourless gas:Gas tidak berwarna:

    ___________________________________________________

    [2 marks]

    (b) Write a complete equation which include physical state for this decomposition.Tuliskan satu persamaan lengkap yang termasuk keadaan fizikal untuk penguraian itu.

    ___________________________________________________

    [2 marks]

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    (c) (i) Calculate the number of moles of copper (II) carbonate used.

    [Relative atomic mass: C, 12; O, 16; Cu, 64]

    Hitungkan bilangan mol bagi kuprum (II) karbonat yang diguna.

    [Jisim atom relatif: C, 12; O, 16; Cu, 64]

    [2 marks]

    (ii) Hence, calculate the mass of the black powder formed and volume of the gas released

    at room temperature and pressure. [ 1 mole of gas occupied 24 dm3 at room

    temperature and pressure]

    Seterusnya, hitungkan jisim serbuk hitam yang terbentuk dan isi padu gas yang dibebaskan pada suhubilik . [1 mol gas menempati 24 dm3pada suhu dan tekanan bilik]

    [3 marks]

    2 (a) Carbon has two isotopes as shown in Table 2.Karbon mempunyai dua isotop seperti yang ditunjukkan dalam Jadual 2.

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    Atom

    Atom

    Proton number

    Nombor proton

    Nucleon number

    Nombor nukleon

    12

    6C

    14

    C

    2

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    Table 2

    (i) Complete Table 2.Lengkapkan Jadual 2.

    [2 marks]

    (ii) State all the three subatomic particles.Nyatakan ketiga-tiga zarah subatom.

    ___________________________________________________

    [1 mark]

    (iii) State one similarity and one difference regarding the two isotopes of carbon.

    Nyatakan satu persamaan dan satu perbezaan mengenai kedua-dua isotop karbon itu.

    ___________________________________________________

    [2 marks]

    (iv) Name one use of carbon-14 isotope.

    Namakan satu kegunaan bagi isotop karbon-14.

    ___________________________________________________

    [1 mark]

    (b) Table 3 shows three elements, Neon, Argon and Krypton.

    Jadual 3 menunjukkan tiga unsur, Neon, Argon dan Krypton.

    Table 3

    (i) In which group of the Periodic Table do these elements located?Dalam kumpulan Jadual Berkala yang manakah unsur-unsur ini terletak?

    ___________________________________________________

    [1 mark]

    (ii) Why are these elements not reactive?Mengapakah unsur-unsur ini tidakreaktif?

    ___________________________________________________

    [1 mark]

    (iii) Write the electron arrangement for an atom Neon.

    Tuliskan susunan elektron untuk atom Neon.

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    [1 mark]

    3 Diagram 2 shows the heating curve of napthalene.Rajah 2 menunjukkan lengkung pemanasan bagi naftalena.

    Diagram 2

    (a) Name the type of particles that forms napthalene.Namakan jenis zarah yang membentuk naftalena.

    ________________________________________________________

    [1 mark]

    (b) State the melting temperature of napthalene.Nyatakan suhu peleburan bagi naftalena.

    ________________________________________________________

    [1 mark]

    (c) At which point does the napthalene begin to melt?Pada titik yang manakah, naftalena bermula untuk melebur?

    ________________________________________________________

    [1 mark]

    (d) State the physical state of napthalene at regions AB, BC and CD.Nyatakan keadaan fizikal naftalena pada kawasan-kawasan AB, BC dan CD.

    ________________________________________________________________________

    [3 marks]

    (e) Explain why there is no change in temperature from point B to point C even when heatingis continued.Jelaskan mengapa tiada perubahan suhu dari titik B hingga titik C walaupun pemanasan diteruskan.

    ________________________________________________________________________

    [3 marks]

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    (f) State the change of movement of napthalene particles between point C and point D during

    the heating process.Nyatakan perubahan pergerakan zarah-zarah naftalena antara titik C dan titik D semasa proses pemanasan.

    ________________________________________________________________________

    [1 mark]

    4 Table 2 shows the proton number of Period 3 elements.Jadual 2 menunjukkan nombor proton bagi unsur Kala 3.

    ElementUnsur

    Na Mg Al Si P S Cl Ar

    Proton numberNombor proton

    11 12 13 14 15 16 17 18

    Table 2

    (a) State the changes of the following physical properties of elements across Period 3. Give a

    reason for your answer.Nyatakan perubahan sifat fizikal yang berikut bagi unsur-unsur merentasi Kala 3. Berikan sebab untukjawapan anda.

    (i) Atomic radius.Jejari atom.

    _____________________________________________________________________

    (ii) Electronegativity.Keelektronegatifan.

    _____________________________________________________________________

    [4 marks]

    (b) Classify all the elements into:Kelaskan semua unsur-unsur ke dalam:

    (i) metallogam

    __________________________________________________________________(ii) non-metal

    bukan logam

    __________________________________________________________________

    (iii) metalloidmetalloid

    __________________________________________________________________

    [3 marks]

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    (c) The elements in Period 3 react with oxygen to form oxides. Name an oxide of these

    element which isUnsur dalam Kala 3 bertindak balas dengan oksigen untuk membentuk oksida. Namakan satu oksida unsuryang merupakan

    (i) acidic.bersifat asid.

    ___________________________________________________(ii) basic.

    bersifat bes.

    ___________________________________________________

    (iii) amphoteric.bersifat amfoterik.

    ___________________________________________________

    [3 marks]

    5 Table 3 shows four atoms labelled W, X, Y and Z.Jadual 3 menunjukkan empat atom berlabel W, X, Y dan Z.

    AtomAtom

    Proton numberNombor proton

    Nucleon numberNombor nukleon

    W 6 12

    X 11 24

    Y 6 14

    Z 17 35

    Table 3

    (a) Define nucleon number.Takrifkan nombor nukleon.

    ___________________________________________________

    [1 mark]

    (b) (i) Determine the number of neutrons of atom Y.Tentukan bilangan neutron dalam atom Y.

    ___________________________________________________

    (ii) Draw the atomic symbol for atom Y.Lukiskan simbol atom bagi atom Y.

    ___________________________________________________

    [2 marks](c) Write down the electron arrangement for the following atoms:

    Tuliskan susunan elektron bagi atom yang berikut:

    (i) X ___________________________________________________

    (ii) Z ___________________________________________________

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    [2 marks]

    (d) If X and Z form ions with the formula of X+ and Z, determine the number ofelectrons in:Jika X dan Z membentuk ion dengan formula X+ dan Z, tentukan bilangan elektron dalam:

    (i) X+ : ___________________________________________________

    (ii) Z : ___________________________________________________

    [2 marks]

    (e) (i) Define isotope.Takrifkan isotop.

    ___________________________________________________

    (ii) Name two atoms in Table 3 which are isotopes.Nama dua atom dalam Jadual 3 yang merupakan isotop.

    __________________________________________________________________

    [2 marks]

    (f) It is known that X is an isotope for sodium. State one use of X.Ini dikenali bahawa X ialah isotop kepada natrium. Nyatakan satu kegunaan X.

    __________________________________________________________________

    [1 mark]

    6 (a) The following are information of a hydrocarbon compound X.Berikut adalah maklumat bagi satu sebatian hidrokarbon X.

    Mass of carbon: 40.8 gJisim karbon

    Mass of hydrogen: 6.8 gJisim hidrogen

    Relative molecular mass of X: 56Jisim molekul relatif bagi X: 56

    Relative atomic mass: H, 1; C, 12Jisim atom relatif: H, 1; C, 12

    (i) What is meant by empirical formula?Apakah yang dimaksudkan dengan formula empirik?

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    __________________________________________________________________

    [1 mark]

    (ii) Determine the empirical formula of X.Tentukan formula empirik bagi X.

    [3 marks]

    (iii) Determine the molecular formula of X.Tentukan formula molekul bagi X.

    [2 marks]

    (b) 76.5 kg of molten bauxite (aluminium oxide) is undergoes electrolysis to extract pure

    aluminium and oxygen gas is released.[Relative atomic mass: O, 16; Al, 27]76.5 kg leburan bauksit (aluminium oksida) menjalani elektrolisis untuk mengekstrakan aluminium tulen

    dan gas oksigen dibebaskan.

    [Jisim atom relatif: O, 16; Al, 27]

    (i) Write the complete equation which including state symbols for the reaction.

    Tuliskan persamaan lengkap yang mengandungi simbol keadaan bagi tindak balas itu.

    __________________________________________________________________

    [2 marks]

    (ii) Calculate the greatest mass of aluminium that can be obtained.Hitungkan jisim aluminium paling banyak yang boleh diperoleh.

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    __________________________________________________________________

    [2 marks]

    (iii) Calculate the volume of gas released from the reaction.Hitungkan isi padu gas yang dibebaskan daripada tindak balas itu.

    __________________________________________________________________

    [2 marks]

    SECTION B [20 marks]BAHAGIAN B [20 markah]

    Answer any one question from this sectionJawab mana-mana satu soalan daripada bahagian ini

    7 Table 4 show the proton number and electron arrangement of element X and YJadual 5 menunjukkan nombor proton dan susunan elektron bagi unsur X dan Y

    ElementUnsur

    Proton numberNombor proton

    Electron arrangementSusunan elektron

    X 17 2.8.7Y 35 2.8.18.7

    Table 4

    (a) Identify element X and Y and state the position of these elements in the Periodic TableKenal pasti unsur X dan Y dan nyatakan kedudukan unsur-unsur ini dalam Jadual Berkala

    [4 marks]

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    (b) Compare the physical properties of element X and Y in term ofBandingkan sifat fizikal unsur X dan Y dalam

    (i) Atomic radiusJejari atom

    (ii) ElectronegativityKeelektronegatifan

    (iii) Melting pointTakat lebur

    (iv) DensityKetumpatan

    [8 marks]

    (c) Element X and Y respectively react with water in an experimentUnsur X dan Y masing-masing bertindak balas dengan air dalam satu eksperimen

    (i) State the purpose of this experimentNyatakan tujuan ekperimen ini

    [1 mark]

    (ii) Which of the element is more reactive? Why?Unsur yang manakah lebih reaktif? Mengapa?

    [2 marks]

    (iii) Write the reaction equation of both elements with waterTuliskan persamaan tindak balas bagi kedua-dua unsur dengan air

    [2 marks]

    (iv) What will happen to the blue litmus paper when it is used to test the solutionproduced? Why?Apakah yang akan terjadi kepada kertas litmus biru apabila digunakan untuk menguji larutan yang

    dihasilkan? Mengapa?

    [3 marks]8 Diagram 3 shows the electronic structure of an atom R.

    Rajah 3 menunjukkan struktur elektron bagi satu atom R.

    Diagram 3

    (a) DefineTakrifkan

    (i) the proton number.nombor proton.

    (ii) the nucleon number.nombor nukleon.

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    [2 marks]

    (b) What are the proton number and the nucleon number of an atom of element R?Apakah nombor proton dan nombor nukleon bagi atom unsur R?

    [2 marks]

    (c) Write the symbol for the atom of element R in the form ofX

    A

    Z .

    Tuliskan simbol atom bagi unsur R dalam bentuk

    X

    A

    Z .

    [1 mark]

    (d) In which group and period of the Periodic Table does the element R located? Explain youranswer.Kumpulan dan kala yang manakah terletaknya unsur R dalam Jadual Berkala? Terangkan jawapan anda.

    [4 marks]

    (e) State the common name for the group of element R located in.Nyatakan nama sepunya bagi kumpulan yang terletaknya unsur R.

    [1 mark]

    (f) Lithium can combine with chlorine to form lithium chloride.Litium boleh bergabung dengan klorin untuk membentuk litium klorida.

    (i) State the type of bond formed in this compound. Explain how this compound is

    formed.Nyatakan jenis ikatan yang terbentuk dalam sebatian ini. Terangkan bagaimana sebatian ini terbentuk.

    [4 marks]

    (ii) State the physical state of this compound under room condition.Nyatakan keadaan fizikal sebatian ini dalam keadaan bilik.

    [1 mark]

    (iii) Explain why this compound has a very high boiling point of 1382C.Terangkan mengapa sebatian ini mempunyai takat didih yang sangat tinggi iaitu 1382C.

    [2 marks]

    (iv) Predict whether lithium chloride conduct electricity in solid or molten state. Explain

    your answer.Ramalkan sama ada litium klorida mengkonduksikan elektrik dalam keadaan pepejal atau leburan.

    Terangkan jawapan anda.

    [3 marks]

    SECTION CBAHAGIAN C

    Answer any one question from this sectionJawab mana-mana satu soalan daripada bahagian ini

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    9 Naphthalene powder is heated in water bath and the temperature is measured every minute. Itis found that naphthalene has a melting point of 80C.Serbuk naftalena dipanaskan dalam kukus air dan suhu diukur setiap minit. Ia didapati naftalena mempunyai

    takat lebur 80C.

    (a) Sketch a heating graph when naphthalene is heated with constant stirring. Label the

    physical state of naphthalene in the graph.Lakarkan satu graf pemanasan apabila naftalena dipanaskan dengan pengacauan sepanjang eksperimen.

    Labelkan keadaan fizikal naftalena dalam graf.

    [3 marks]

    (b)Based on the graph in (a), describe the arrangement and movement of molecules of

    naphthalene at each stages.Berdasarkan graf dalam (a), huraikan susunan dan pergerakan molekul naftalena pada setiap peringkat.

    [10 marks]

    (c) Give two reasons why water bath is used to heat up naphthalene powder.Berikan dua sebab mengapa kukus air digunakan utnuk memanaskan serbuk naftalena.

    [2 marks]

    (d) Sketch a cooling graph when naphthalene is cooled without constant stirring. Explain the

    difference between graphs in (a) and (d).Lakarkan satu graf penyejukan apabila naftalena disejukkan tanpa dikacau. Terangkan perbezaan antara graf

    dalam (a) dan (d).

    [5 marks]

    10 (a) Diagram 4 shows a list of elements from Group 18 in Periodic Table of Elements.Rajah 4 menunjukkan senarai unsur daripada Kumpulan 18 dalam Jadual Berkala Unsur.

    1. Helium Helium

    2. Neon Neon

    3. Argon Argon

    4. Krypton Kripton

    Diagram 4

    (i) State the common name for these elements.Nyatakan nama sepunya bagi unsur tersebut.

    [1 mark]

    (ii) Give one physical and one chemical properties of these group of elements.Berikan satu sifat fizikal dan satu sifat kimia bagi unsur dalam kumpulan ini.

    [2 marks]

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    (iii) State a use of each elements.

    Nyatakan satu kegunaan bagi setiap unsur.

    [4 marks]

    (b) Diagram 5 shows the elements in Group 1 from the Periodic Table of Elements.Rajah 5 menunjukkan unsur dalam Kumpulan 1 daripada Jadual Berkala Unsur.

    1. Lithium Litium

    2. Sodium Natrium

    3. Potassium Kalium

    4. Rubidium Rubidium

    5. Caecium Sesium

    6. Francium Fransium

    Diagram 5

    (i) State the common name for Group 1.

    Nyatakan nama sepunya untuk Kumpulan 1.[1 mark]

    (ii) Describe a laboratory experiment to test the reactivity of the elements going downGroup 1.Huraikan satu eksperimen dalam makmal untuk mengkaji kereaktifan unsur apabila menuruni

    Kumpulan 1.

    [10 marks]

    (iii) State two precautions when handling Group 1 elements.Nyatakan dua langkah-langkah berjaga apabila mengendalikan unsur Kumpulan 1.

    [2 marks]

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