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Soalan Percubaan Kimia MRSM SPM 2008
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CONFIDENTIAL
4541/1
Chemistry
Paper 1
September
2008
1 ¼ hour
SPM TRIAL EXAMINATION 2008
MARA JUNIOR SCIENCE COLLEGE
CHEMISTRY
Paper 1
One hour and fifteen minutes
DO NOT OPEN THE QUESTION BOOKLET
UNTIL BEING TOLD TO DO SO.
1. The question booklet is bilingual.
Kertas soalan ini adalah dalam dwibahasa.
2. Candidates are advised to read information on the back page of the question booklet.
Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.
This question booklet has 30 printed pages
http://cikguadura.wordpress.com/
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1 Diagram 1 shows the inter conversion of water, steam and ice.
In which conversion do H2O molecules lose speed? Rajah 1 menunjukkan perubahan keadaan air, ais dan stim.
Dalam perubahan manakah molekul H2O hilang kelajuan?
Diagram 1 Rajah 1
A Ice → water Ais → air
B Ice → steam Ais → stim
C Water → steam Air → stim
D Steam → ice Stim → ais
2 Which of the following formula represents a compound containing three atoms? Antara formula berikut, yang manakah mewakili sebatian yang mengandungi tiga atom?
A HNO3
B H2O
C LiF
D ZnSO4
3 A covalent compound does not conduct electricity because Sebatian kovalen tidak mengalirkan arus elektrik kerana
A it does not dissolve in water ia tidak larut dalam air
B it has strong covalent bonding ia mempunyai ikatan kovalen yang kuat
C particles consist of molecules zarah terdiri daripada molekul
D ions in the covalent compound are not mobile ion-ion dalam sebatian kovalen tidak bergerak bebas
Steam Stim
Water Air
Ice Ais
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4 Table 1 shows the nucleon numbers and proton numbers of atoms W, X, Y, and Z. Jadual 1 menunjukkan nombor nukleon dan nombor proton bagi atom-atom W, X, Y, dan Z.
W X Y Z
Nucleon number Nombor nukleon
35 37 40 39
Proton number Nombor proton
17 17 18 19
Table 1 Jadual 1
How many atom(s) represent non-metallic elements? Berapa atomkah mewakili unsur bukan logam?
A 1
B 2
C 3
D 4
5 Diagram 2 shows a circuit where the bulb lights up. Rajah 2 menunjukkan satu litar dimana mentolnya menyala.
Diagram 2 Rajah 2
What is substance G? Apakah bahan G?
A A solution of ethanol in water Larutan etanol dalam air
B Aqueous sodium chloride Natrium klorida akues
C Solid sodium chloride Pepejal natrium klorida
D Liquid ethanol Cecair etanol
Bulb Mentol
Substance G Bahan G
Electrodes Elektrod
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6 In which experiment the limewater does not turn cloudy?
Dalam eksperimen manakah air kapur tidak menjadi keruh?
A B
C
D
7 Lead(II) iodide is formed when aqueous lead(II) nitrate is added to a solution
containing iodide ions.
What type of reaction takes place? Plumbum(II) iodida terbentuk apabila plumbum(II) nitrat akueus dicampur kepada larutan yang
mengandungi ion iodida.
Apakah jenis tindak balas yang berlaku?
A Neutralisation Peneutralan
B Oxidation Pengoksidaan
C Reduction Penurunan
D Precipitation Pemendakan
8 A salt always .. Garam sentiasa
A contains ions mengandungi ion
B dissolves in water larut dalam air
C forms white crystals membentuk hablur putih
D conducts electricity mengalirkan arus elektrik
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9 The bodies of an aeroplane, a car and a wheelbarrow are made of alloy. Rangka kapalterbang, kereta dan kereta sorong diperbuat daripada aloi.
Diagram 3
Rajah 3
Which alloy is used in making the bodies of aeroplane, car and wheelbarrow? Antara aloi berikut, yang manakah digunakan untuk membuat rangka kapalterbang, kereta dan kereta
sorong?
Aeroplane Kapalterbang
Car Kereta
Wheelbarrow Kereta sorong
A Magnalium Magnalium
Brass Loyang
Steel Keluli
B Duralumin Duralumin
Steel Keluli
Steel Keluli
C Pewter Pewter
Bronze Gangsa
Brass Loyang
D Steel Keluli
Stainless steel Keluli nirkarat
Solder Pateri
10 Copper wires in an electricity cable are covered in plastic as shown in diagram 4.
Plastic is used because it is Dawai kuprum dalam kabel elektrik disalut dengan plastik seperti Rajah 4.
Plastik digunakan sebab ia
Diagram 4
Rajah 4
A hard. keras
B a polymer. polimer
C an insulator. penebat
D melts easily. mudah dilebur
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11 A solution of hydrogen peroxide releases oxygen slowly at room temperature. Larutan hidrogen peroksida membebaskan oksigen pada suhu bilik.
Hydrogen peroxide → water + oxygen Hidrogen peroksida → air + oksigen
Diagram 5 shows the effect of adding manganese(IV) oxide to the solution. Rajah 5 menunjukkan kesan penambahan mangan(IV) oksida kepada larutan tersebut.
Diagram 5 Rajah 5
What could be the reason for the observed change? Apakah sebab bagi perubahan yang diperhatikan?
A Manganese(IV) oxide acts as a catalyst Mangan(IV) oksida bertindak sebagai mangkin
B Manganese(IV) oxide reacts with the hydrogen peroxide Mangan(IV) oksida bertindak balas dengan hidrogen peroksida
C The hydrogen peroxide is neutralised by manganese(IV) oxide Hidrogen peroksida dineutralkan oleh mangan(IV) oksida
D The hydrogen peroxide becomes more concentrated Hidrogen peroksida bertambah pekat
12 Which of the following substance is found in crude oil? Antara bahan berikut yang manakah terdapat dalam minyak mentah?
A Ethanoic acid Asid etanoik
B Polythene Politena
C Ethanol Etanol
D Butane Butana
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13 2 g of marble is added to 10 cm3 of hydrochloric acid in four different test tubes.
In which test tube is the reaction fastest? 2 g marmar ditambah kepada 10 cm
3 asid hidroklorik dalam empat tabung uji berlainan.
Dalam tabung uji manakah menghasilkan tindak balas paling cergas?
A B
C D
14 What are formed when glucose is fermented? Apakah yang terbentuk dalam penapaian glukosa?
A Ethanol and carbon dioxide Etanol dan karbon dioksida
B Ethanol and oxygen Etanol dan oksigen
C Ethene and carbon dioxide Etena dan karbon dioksida
D Ethene and oxygen Etena dan oksigen
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15 Diagram 6 shows the apparatus set up used to study the reaction of metal oxide and
carbon. Rajah 6 menunjukkan susunan radas yang digunakan untuk mengkaji tindak balas antara logam oksida
dengan karbon.
Diagram 6 Rajah 6
Which of the following metal oxide will turn the lime water cloudy?
Antara oksida logam berikut yang manakah mengeruhkan air kapur?
A Magnesium oxide Magnesium oksida
B Copper(II) oxide Kuprum(II) oksida
C Calcium oxide Kalsium oksida
D Aluminium oxide Aluminium oksida
16 The reaction between solution P and solution Q is exothermic.
A student confirms this statement by mixing equal volumes of the two solutions and
measuring the temperature change.
Which two pieces of apparatus should the student use?
Tindak balas antara larutan P dan Q adalah eksotermik.
Pelajar mengesahkah pernyataan tersebut dengan mencampurkan isipadu yang sama bagi dua
larutan dan mengukur perubahan suhu.
Apakah dua radas yang perlu digunakan?
A Balance and stop watch Neraca dan jam randik
B Balance and thermometer Neraca dan termometer
C Pipette and stop watch Pipet dan jam randik
D Pipette and thermometer Pipet dan termometer
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17 Diagram 7 shows a set up where hydrogen is passed over a heated metal oxide. Rajah 7 menunjukkan susunan radas di mana hidrogen dilalirkan atas logam oksida yang panas.
Diagram 7
Rajah 7
What happens to the hydrogen and metal oxide? Apa berlaku kepada hidrogen dan oksida logam?
Hydrogen Hidrogen
Metal oxide Logam oksida
A Oxidised Dioksidakan
Oxidised Dioksidakan
B Reduced Diturunkan
Oxidised Dioksidakan
C Reduced Diturunkan
Reduced Diturunkan
D Oxidised Dioksidakan
Reduced Diturunkan
18 Diagram 8 shows the structure of a palmitate ion. Rajah 8 menunjukkan struktur bagi ion palmitat.
Diagram 8
Rajah 8
Which of the following statements is true? Antara pernyataan berikut yang manakah benar?
A Parts R and S are soluble in water Bahagian R dan S larut dalam air
B Parts R and S are soluble in grease Bahagian R dan S larut dalam gris
C Part R is soluble in grease and part S is soluble in water Bahagian R larut dalam gris dan S larut dalam air
D Part R is soluble in water and part S is soluble in grease Bahagian R larut dalam air dan S larut dalam gris
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19 Diagram 9 shows an experiment in which magnesium oxide powder is added to dilute
hydrochloric acid. Rajah 9 menunjukkan eksperimen di mana serbuk magnesium oksida ditambah ke dalam asid
hidroklorik cair.
Diagram 9 Rajah 9
Which reaction takes place in the experiment? Apakah tindak balas yang terlibat dalam eksperimen tersebut?
Exothermic Eksotermik
Neutralisation
Peneutralan
A
B
C
D
20 What is the function of an analgesic? Apakah fungsi analgesik?
A To relieve pain Mengurangkan rasa sakit
B To treat asthma Merawat asma
C To destroy bacteria Menghapuskan bakteria
D To calm down the emotion of the patient Menenangkan emosi pesakit
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21 Table 2 shows the melting point and boiling points of five compounds J, K, L, M and
N. Which substance exists as a liquid at room temperature?
Jadual 2 menunjukkan takat lebur dan takat didih bagi lima sebatian J , K , L , M dan N. Antara bahan
berikut yang manakah wujud dalam keadaan cecair pada suhu bilik?
Substance
Bahan
Melting point(oC)
Takat lebur(0C)
Boiling point(oC)
Takat didih(oC)
J -160 -142
K -32 55
L -96 64
M 42 172
N 142 292
Table 2 Jadual 2
A J only J sahaja
B J and K only J dan K sahaja
C K and L only K dan L sahaja
D M and N only M dan N sahaja
22 When propane is burned in excess oxygen, carbon dioxide and water are formed and
is represented by the equation Apabila propana dibakar dalam oksigen berlebihan, karbon dioksida dan air dihasilkan dan di wakili
oleh persamaan berikut
C3H8 + 5O2 → r CO2 + s H2O
What are the values of r and s that balances the equation? Apakah nilai r dan s yang mengimbangkan persamaan tersebut?
r s
A 1 3
B 1 5
C 3 4
D 3 8
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23 Diagram 11 shows part of the Periodic Table of Elements. Rajah 11 menunjukkan sebahagian daripada Jadual Berkala Unsur
Diagram 11
Rajah 11
The proton number of X is Numbor proton X adalah
A seven less than that of Z kurang tujuh daripada Z
B three less than that of Z kurang tiga daripada Z
C one less than that of Y kurang satu daripada Y
D sixteen less than that of Y kurang enam belas daripada Y
24 Diagram12 shows a model of a molecule containing carbon, hydrogen and oxygen. Rajah 12 menunjukkan model bagi satu molekul yang mengandungi karbon, hidrogen dan oksigen.
Diagram 12
Rajah 12
How many atoms of each element are in the molecule? Berapakah bilangan atom bagi setiap unsur dalam molekul tersebut?
Carbon Karbon
Hydrogen Hidrogen
Oxygen Oksigen
A 1 6 2
B 2 5 1
C 2 6 1
D 6 2 1
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25 Diagram 13 shows a simple voltaic cell by using different electrode T and N. Rajah 13 menunjukkan sel kimia ringkas menggunakan elektrod berbeza, T dan N.
Electrode T Electrode N
Elektrod T Elektrod N
Copper (II) sulphate solution
Larutan kuprum(II) sulfat
Diagram 13 Rajah 13
Metal T acts as the positive terminal and the potential difference is 1.9 V.
Which of the following statements is true? Logam T bertindak sebagai terminal positif dan beza upaya ialah 1.9V .
Antara pernyataan berikut yang manakah benar tentang sel kimia itu?
A T is more electropositive than N T lebih elektropositif daripada N
B Brown solid is deposited at N electrode Pepejal perang terenap di elektrod N
C Electron flows from T to N through the external circuit Elektron mengalir dari T ke N melalui litar luar
D The potential difference will decrease if T is replaced by any other more
electropositive metal than T Beza upaya akan berkurang jika T digantikan oleh logam lain yang lebih elektropositif
daripada T
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26 Diagram 14 shows the pH values of the soil in part F and part G of a palm oil plantation. Rajah 14 menunjukkan nilai pH bagi tanah di bahagian F dan G bagi suatu ladang kelapa sawit.
Diagram 14
Rajah 14
The owner wishes to use lime to neutralise the soil in one part of the plantation
Which part should the lime(calcium oxide) be added, and why? Pemilik ladang bercadang menggunakan kapur untuk meneutralkan sebahagian daripada ladangnya.
Bahagian manakah yang perlu ditambah kapur dan mengapa?
A F because lime is acidic F sebab kapur berasid
B F because lime is basic F sebab kapur beralkali
C G because lime is acidic G sebab kapur berasid
D G because lime is basic G sebab kapur beralkali
27 Diagram 15 shows how ion W in a solution can be identified. Rajah 15 menunjukkan bagaimana ion W dalam larutan dapat dikenalpasti.
Diagram 15
Rajah 15
What is ion W? Apakah ion W?
A NH4 +
(aq)
B Al3+
(aq)
C NO3-
(aq)
D SO42-
(aq)
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28 Polymerization occurs when many small molecules combined to form a long chained
molecule (polymer).
Diagram 16 shows the structure of a small molecule. Pempolimeran berlaku apabila banyak molekul kecil bergabung membentuk molekul berantai panjang
(polimer).
Rajah 16 menunjukkan struktur suatu molekul kecil
Diagram 16
Rajah 16
Which of the following represents the structure of a polymer formed when these small
molecules are linked together? Antara berikut yang manakah mewakili struktur polimer yang terbentuk apabila molekul kecil tersebut
bergabung?
A
B
C
D
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29 Ethanol reacts with ethanoic acid to form ethyl ethanoate. Etanol bertindak balas dengan asid etanoik membentuk etil etanoat.
C2H5OH + CH3COOH → CH3COOC2H5 + H2O
What is the formula of the ester formed when methanol reacts with butanoic acid,
(C3H7COOH)? Apakah formula bagi ester yang terbentuk apabila metanol bertindak balas dengan asid butanoik,
(C3H7COOH)?
A C2H5COOC2H5
B C3H7COOC2H5
C C3H7COOCH3
D CH3COOC3H7
30 Diagram 17 shows set up of apparatus to study the rate of reaction. Magnesium is
added to excess dilute hydrochloric acid at 25 oC
Rajah 17 menunjukkan susunan radas untuk mengkaji kadar tindak balas. Magnesium ditambah
kepada asid hidroklorik berlebihan pada suhu 25oC.
Diagram 17
Rajah 17
Which of the following effects on rate and amount of product are correct when the
concentration of acid and temperature are increased? Antara kesan ke atas kadar dan kuantiti hasil berikut yang manakah betul apabila kepekatan asid dan
suhu ditambah?
Increase concentration
of acid Penambahan kepekatan asid
Increase temperature Penambahan suhu
Amount of
product Kuantiti hasil
A Increase rate of reaction Kadar tindak balas bertambah
Increase rate of reaction Kadar tindak balas bertambah
no change Tidak berubah
B Decrease rate of reaction Kadar tindak balas berkurang
Decrease rate of reaction Kadar tindak balas berkurang
Increase Bertambah
C Decrease rate of reaction Kadar tindak balas berkurang
Increase rate of reaction Kadar tindak balas bertambah
Decrease Berkurang
D Increase rate of reaction Kadar tindak balas bertambah
Decrease rate of reaction Kadar tindak balas berkurang
Increase
Bertambah
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31 Diagram 18 shows oxidation process of ethanol. Rajah 18 menunjukkan proses pengoksidaan etanol
Diagram 18
Rajah 18
What can be observed after being heated for 5 minutes? Apakah yang dapat diperhatikan selepas 5 minit dipanaskan?
A No colour change Tiada perubahan warna
B All of the ethanol vapourises and the flask becomes dry Semua etanol meruap dan kelalang kering
C The colour of mixture changes from orange to green Warna larutan campuran bertukar dari jingga ke hijau
D The mixture in the flask separated into two layers. The upper layer is yellow
while the lower layer is green Campuran dalam kelalang membentuk dua lapisan. Lapisan atas berwarna kuning, lapisan
bawah berwarna hijau
Ethanol with acidified
potassium dichromate Campuran etanol
dan kalium dikromat berasid
Water in Air masuk
Water out Air keluar
Heat Haba
Air
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32 Diagram 19 shows the apparatus set up used to investigate the rusting of iron. Rajah 19 menunjukkan susunan radas yang digunakan untuk mengkaji pengaratan besi
Diagram 19 Rajah 19
In which test-tubes will the iron rust? Dalam tabung uji manakah besi mengalami pengaratan?
A I only I sahaja
B II only II sahaja
C I and III only I dan III sahaja
D II and III only II dan III sahaja
33 Diagram 20 shows a match. By striking the match, a chemical reaction is initiated. Rajah 20 menunjukkan sebatang mancis. Apabila mengores mancis, satu tindak balas akan dimulakan.
Diagram 20
Rajah 20
Which statements about the chemical reaction are correct? Antara pernyataan berikut yang manakah benar mengenai tindak balas di atas?
A Reaction is endothermic because energy is used to strike the match Tindak balas adalah endotermik sebab tenaga digunakan untuk mengores mancis
B Reaction is endothermic because energy is given out as the match burns Tindak balas adalah endotermik sebab tenaga dibebaskan apabila mancis terbakar
C Reaction is exothermic because energy is used to strike the match Tindak balas adalah eksotermik sebab tenaga digunakan untuk mengores mancis
D Reaction is exothermic because energy is given out as the match burns Tindak balas adalah eksotermik sebab tenaga dibebaskan apabila mancis terbakar
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34 Diagram 21 shows apparatus set up used to prepare barium chloride and barium
sulphate. In each experiment, the acid is run into the conical flask until the resulting
liquid has pH7. Rajah 21 menunjukkan dua susunan radas untuk menghasilkan barium klorida dan barium sulfat.
Dalam setiap eksperimen, asid dititis ke dalam kelalang kon sehingga larutan mencapai pH 7.
Diagram 21
Rajah 21
What are the next steps to obtain samples of the solid salts? Apakah langkah seterusnya untuk mendapatkan garam dalam bentuk pepejal?
Barium chloride Barium klorida
Barium sulphate Barium sulfat
A Crystallisation
Penghabluran Crystallisation
Penghabluran
B Crystallisation
Penghabluran Filtration Penurasan
C Filtration Penurasan
Crystallisation Penghabluran
D Filtration Penurasan
Filtration Penurasan
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35 For complete combustion, one molecule of an organic compound needs six molecules
of oxygen.
What could the formula of this compound be? Untuk pembakaran lengkap, satu molekul sebatian organik memerlukan enam molekul oksigen.
Apakah formula bagi sebatian tersebut?
A C2 H4
B C2 H6
C C4 H8
D C H3OH
36 Redox reaction between iron(II) ion and manganate(VII) ion is represented by the
equation: Tindak balas redoks antara ion ferum(II) dan ion manganat(VII) diwakili oleh persamaan:
5 Fe2+
+ MnO4- + 8 H
+ → 5 Fe
3+ + Mn
2+ + 4 H2O
What can be deduced from the equation? Apakah yang dapat disimpulkan daripada persamaan ini?
I The oxidation state of manganese changes from +7 into +2 Nombor pengoksidaan mangan berubah dari +7 kepada +2
II The oxidation state of hydrogen changes from +1 into 0 Nombor pengoksidaan hidrogen berubah dari +1 kepada 0
III The greenish colour of iron(II) ions solution turns to colourless Warna hijau ion ferum(II) bertukar kepada tidak berwarna
IV Electrons transfer from iron(II) ions to manganate(VII) ions Pemindahan elektron dari larutan ion ferum(II) kepada ion manganat(VII)
A I and III only I dan III sahaja
B I and IV only I dan IV sahaja
C I, II and III only I, II dan III sahaja
D I, II, III and IV I, II, III dan IV
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37 Table 3 describes the structures of four particles. Jadual 3 menunjukkan struktur bagi empat zarah.
Particle Zarah
Number of
protons Bilangan proton
Number of
neutrons Bilangan neutron
Number of electrons
Bilangan elektron
O 8 8 8
O 2-
8 8 P
Na 11 Q 11
Na+
11 12 R
Table 3 Jadual 3
What are the correct values of P, Q and R? Apakah nilai yang betul bagi P, Q dan R?
P Q R
A 9 11 10
B 9 11 11
C 10 12 10
D 10 12 11
38 L and M are diatomic elements. L is less reactive than M.
Which of the following elements are L and M? L dan M adalah unsur-unsur dwiatom.
Antara berikut yang manakah merupakan unsur L dan M?
L M
A Bromine
Bromin Iodine
Iodin
B Iodine Iodin
Bromine Bromin
C Sodium Natrium
Potassium Kalium
D Potassium
Kalium Sodium
Natrium
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39 Table 4 gives information about the ability of four substances to conduct electricity. Jadual 4 menunjukkan maklumat mengenai kebolehan empat bahan untuk mengalirkan elektrik.
Substance Bahan
Electrical conductivity Kekonduksian elektrik
R Does not conduct under any conditions Tidak mengalirkan arus elektrik dalam semua keadaan
T Conducts only in aqueous solution Mengalirkan arus elektrik dalam keadaan berair sahaja
U Conducts in molten and solid state Mengalirkan arus elektrik dalam keadaan leburan dan pepejal
W Conducts in molten state and aqueous solution Mengalirkan arus elektrik dalam keadaan leburan dan larutan berair
Table 4 Jadual 4
What could these four substances be? Apakah keempat-empat bahan ini?
R T U W
A Pb HCl NaCl S
B S HCl NaCl Pb
C S HCl Pb NaCl
D S NaCl HCl Pb
40 Heating ammonium salts with sodium hydroxide will produce ammonia gas.
Which of the following ammonium salt can produce the greatest volume of ammonia
gas? Pemanasan garam ammonium dengan natrium hidroksida menghasilkan gas ammonia.
Antara garam ammonium berikut yang manakah akan menghasilkan isipadu gas ammonia tertinggi?
A 0.5 mol (NH4)3PO4
B 0.5 mol (NH4)2SO4
C 1.0 mol NH4Cl
D 1.0 mol NH4NO3
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41 Diagram 22 shows an incomplete apparatus set up. Rajah 22 menunjukkan susunan radas yang tidak lengkap.
Diagram 22
Rajah 22
Which of the following diagrams shows the correct completion at X after the solution
has been electrolysed for some time? Antara rajah berikut yang manakah merupakan pelengkap yang betul di X selepas elektrolisis
dijalankan beberapa ketika?
A
B
C
D
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42 Diagram 23 shows an electrolytic circuit using inert electrodes.
At which electrode is metal deposited? Rajah 23 menunjukkan satu litar elektrolisis menggunakan elektrod lengai.
Pada elektrod manakah logam terenap?
Molten lead(II) bromide Plumbum(II) bromida lebur
Aqueous sodium chloride
Natrium klorida akueus Heat
Diagram 23 Rajah 23
43 Dilute hydrochloric acid was reacted with magnesium ribbon and the volume of
hydrogen gas evolved was measured for the first 80 s. Asid hidroklorik cair ditindak balaskan dengan pita magnesium dan isipadu gas hidrogen terbebas
diukur bagi 80 saat pertama.
What was the average rate of production of hydrogen? Apakah kadar purata bagi pembebasan hidrogen?
A 0.4 cm3/ s
B 2.5 cm3/ s
C 4.0 cm3/ s
D 40.0 cm3/ s
Panaskan
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44 Diagram 24 shows some reactions of a compound J. Rajah 24 menunjukkan beberapa tindak balas bagi sebatian J.
Excess HNO3
HNO3 berlebihan
+
Excess NaOH
NaOH berlebihan
Diagram 24 Rajah 24
What could compound J be? Apakah sebatian J?
A Aluminium carbonate Aluminium karbonat
B Magnesium carbonate Magnesium karbonat
C Copper(II) carbonate Kuprum(II) karbonat
D Zinc carbonate Zink karbonat
Compound J Sebatian J
Gas Colourless solution Larutan tanpa warna
White precipitate in excess NaOH Mendakan putih dalam NaOH berlebihan
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45 Calcium carbonate reacts with excess hydrochloric acid at room temperature and is
represented by the equation Kalsium karbonat bertindak balas dengan asid hidroklorik berlebihan pada suhu bilik dan diwakili
oleh persamaan.
CaCO3 + 2HCl → CaCl2 + H2O + CO2
Two experiments were carried out. Dua eksperimen telah dijalankan.
Experiment I: 10 g of calcium carbonate in large lumps. Eksperimen I: 10 g ketulan kalsium karbonat
Experiment II: 5 g of calcium carbonate as a fine powder. Eksperimen II: 5g serbuk kalsium karbonat
Which of the following graph of volume of gas against time is correct? Antara graf isipadu gas melawan masa berikut yang manakah benar?
A
B
C
D
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46 Ethene reacts with steam in the presence of a suitable catalyst.
What is the structural formula of the compound formed? Etena akan bertindak balas dengan stim dalam kehadiran mangkin yang sesuai.
Apakah formula struktur bagi sebatian yang terbentuk?
47 Powdered carbon and copper are separately heated as shown in Diagram 25. Serbuk karbon dan kuprum dipanaskan secara berasingan seperti ditunjukkan dalam Rajah 25.
Diagram 25
Rajah 25
What are the changes in the masses of the powder? Apakah perubahan jisim bagi kedua-dua serbuk?
Carbon Karbon
Copper Kuprum
A Decrease Berkurangan
Decrease Berkurangan
B Decrease Berkurangan
Increase Bertambah
C Increase Bertambah
Decrease Berkurangan
D Increase Bertambah
Increase Bertambah
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48 Table 5 shows the result of three experiments involving halogen displacement. Jadual 5 menunjukkan keputusan bagi tiga eksperimen penyesaran halogen.
Experiment Eksperimen
Halogen added Halogen ditambah
Halide solution Larutan halida
X-
Y-
Z-
I X2 - Y2 produced Y2 dihasilkan
Z2 produced Z2 dihasilkan
II Y2 No reaction
Tiada perubahan -
No reaction Tiada perubahan
III Z2 No reaction
Tiada perubahan Y2 produced Y2 dihasilkan
-
Table 5 Jadual 5
What are halogens X, Y and Z? Apakah halogen X, Y dan Z?
X Y Z
A Br Cl I
B Br I Cl
C Cl I Br
D Cl Br I
49 The thermochemical equation represents the displacement of iron. Persamaan termokimia mewakili tindak balas penyesaran ferum.
Mg(s) + Fe2+
(aq) → Mg2+
(aq) + Fe(s) = -189 kJ mol 1
Which of the following statements are true? Manakah antara berikut benar?
I Magnesium is oxidized Magnesium dioksidakan
II Reaction is exothermic Tindak balas adalah eksotermik
III The temperature decreases Suhu berkurangan
IV The heat released by reacting 0.2 mole of ferum(II) ions is 37.8 kJ Haba yang dibebaskan semasa 0.2 mol ion ferum(II) bertindak balas ialah 37.8 kJ mol
-1.
A I and II only I dan II sahaja
B II and IV only II dan IV sahaja
C III and IV only III dan IV sahaja
D I, II and IV only I,II dan IV sahaja
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50 When zinc nitrate is heated strongly, it decomposes according to the equation Apabila zink nitrat di panaskan dengan kuat, ia akan terurai mengikut persamaan
2 Zn(NO3)2 → 2 ZnO + 4 NO2 + O2
Which of the following will be produced when 18.9 g of zinc nitrate is heated?
[Molar mass Zn(NO3)2 = 189 gmol-1
, molar mass zinc oxide = 81 gmol-1
and 1 mol
of gas occupies a volume of 24 dm3 at room temperature and pressure]
Antara berikut yang manakah akan terhasil jika 18.9 g zink nitrat dipanaskan?
[Jisim molar: Zn(NO3)2 =189 gmol-1
, molar mass ZnO = 81 gmol-1
dan 1 mol gas menempati isipadu
sebanyak 24 dm3 pada suhu dan tekanan bilik]
A 4.8 dm3 nitrogen dioxide gas
4.8 dm3 gas nitrogen dioksida
B 0.04 mol of oxygen gas 0.04 mol of gas oksigen
C 7.1 g zinc oxide 7.1 g zink oksida
D 2.4 dm3 oxygen gas
2.4 dm3 gas oksigen
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INFORMATION FOR CANDIDATES
MAKLUMAT UNTUK CALON
1. This question paper consists of 50 questions. Kertas soalan ini mengandungi 50 soalan.
2. Answer all questions. Jawab semua soalan
3. Each question is followed by four alternative answers A, B, C and D. For each
question, choose one answer only. Blacken your answer on the objective answer sheet
provided. Tiap-tiap soalan di ikuti oleh empat pilihan jawapan, iaitu A, B, C dan D. Bagi setiap soalan, pilih satu
jawapan sahaja. Hitamkan jawapan anda pada kertas jawapan objektif yang disediakan.
4. If you wish to change your answer, erase the blackened mark that you have made.
Then blacken the new answer. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan
jawapan yang baru.
5. The diagrams in the questions provided are not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.
6. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.
Name : …………………………………….
Index Number: …......…………………….
SPM TRIAL EXAMINATION 2008
MARA Junior Science College
CHEMISTRY
Paper 2
Two hours and thirty minutes
DO NOT OPEN THE QUESTION BOOKLET
UNTIL BEING TOLD TO DO SO
1. Write your name and index number in the
spaces provided. Tuliskan nama dan angka giliran anda pada ruang
yang disediakan.
2. The question booklet is bilingual
Kertas soalan ini adalah dalam dwibahasa.
3. Candidate is required to read the information
at the back page of the question booklet. Calon dikehendaki membaca maklumat di halaman
belakang kertas soalan ini .
Kod Pemeriksa
Section Question Full
mark Marks
A
1 9
2 9
3 10
4 10
5 11
6 11
B
7 20
8 20
C
9 20
10 20
TOTAL
This booklet contains 32 printed pages.
4541/2
Chemistry
Paper 2
Sept 2008
2 ½ hour
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Section A Bahagian A
[60 marks]
[60 markah]
Answer all questions in this section. Jawab semua soalan dalam bahagian ini.
1 Diagram 1.1 shows the set up of the apparatus used in an experiment to determine
the melting point of a substance M. Rajah 1.1 menunjukkan susunan radas yung digunakan untuk menentukan takat lebur bahan M.
Diagram 1.1 Rajah 1.1
(a) (i) State one error in Diagram 1.1 Nyatakan satu kesilapan di dalam Rajah 1.1.
……………………………………………………………………...
[1 mark] [1 markah]
(ii) Why water bath is used to heat the substance M? Mengapakah kukus air digunakan untuk memanaskan bahan M?
……………………………………………………………………...
[1 mark] [1 markah]
For
Examiner’s
Use
1(a)(i)
i)
1(a)(ii)
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(b) Diagram 1.2 shows a graph of temperature against time when solid of
substance M is heated. Rajah 1.2 menunjukkan graf suhu melawan masa apabila pepejal bahan M dipanaskan.
Diagram 1.2
Rajah 1.2
(i) What is the melting point of substance M? Berapakah takat lebur bahan M?
……………………………………………………………………...
[1 mark] [1 markah]
(ii) State the physical state of substance M at point F. Nyatakan keadaan fizikal bahan M pada titik F.
……………………………………………………………………...
[1 mark] [1 markah]
(iii) Compare kinetic energy of particles at points E and F Bandingkan tenaga egativ zarah-zarah pada titik E dan F.
……………………………………………………………………...
[1 mark] [1 markah]
For
Examiner’s
Use
1(b)(iii)
1(b)(i)
1(b)(ii)
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(iv) Draw the arrangement of particles of substance M at 60oC and
90oC.
Lukiskan susunan zarah-zarah bahan M pada suhu 60OC dan 90
OC.
60oC 90
oC
[2 marks] [2 markah]
(c) Diagram 1.3 shows the structural formula of substance M. Rajah 1.3 menunjukkan formula struktur bahan M.
Diagram 1.3 Rajah 1.3
(i) What is meant by molecular formula? Apakah yang dimaksudkan dengan formula molekul?
……………………………………………………………………...
……………………………………………………………………...
[1 mark] [1 markah]
(ii) State the molecular formula of substance M. Nyatakan formula molekul bahan M.
……………………………………………………………………...
[1 mark] [1 markah]
For
Examiner’s
Use
1(b)(iv)
1(c)(i)
1(c)(ii)
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2 Diagram 2 shows the set up of apparatus of two types of cells.
Rajah 2 menunjukkan susunan radas dua jenis sel.
Cell I Sel I
Cell II Sel II
Diagram 2 Rajah 2
(a) For the reaction in Cell I, Bagi tindak balas Sel I,
(i) State the energy change. Nyatakan perubahan tenaga
..……………………………………………………………………..
(ii) State one observation. Nyatakan satu pemerhatian
..……………………………………………………………………..
[2 marks] [2 markah]
(b) Identify the negative terminal of Kenalpasti terminal negatif di
Cell I : …………………………………………………………………….. Sel I
Cell II : ……………………………………………………………………..
Sel II [2 marks] [2 markah]
(c) For the reaction that occurs in Cell II: Bagi tindak balas yang berlaku di Sel II:
(i) What is the function of the porous pot? Apakah fungsi pasu berliang?
………………………………………………………………………
[1 mark] [1 markah]
For
Examiner’s
Use
2(b)
2(c)(i)
2(a)
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(ii) State one observation. Nyatakan satu pemerhatian.
………………………………………………………………………
[1 mark] [1 markah]
(iii) Write the overall ionic equation Tulis persamaan ion keseluruhan
……………………………………………………………………...
[1 mark] [1 markah]
(d) Zinc electrode and zinc sulphate solution in Cell II are replaced by iron
electrode and iron (II) sulphate solution.
State the changes to the voltmeter reading. Explain your answer.
Elektrod zink dan larutan zink sulfat dalam sel II digantikan dengan elektrod ferum dan
larutan ferum (II ) sulfat,
Nyatakan perubahan kepada bacaan voltmeter. Terangkan jawapan anda..
………………………………………………………………………………
………………………………………………………………………………
[2 marks] [2 markah]
For
Examiner’s
Use
2(d)
2(c)(ii)
2(c)(iii)
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3 Diagram 3 shows the apparatus set-up for the preparation of zinc sulphate from
zinc carbonate and an acid. Rajah 3 menunjukkan susunan radas untuk penyediaan zink sulfat daripada zink karbonat dengan
suatu asid.
Heat
Step 1
Step II
Step IV
Heat
Step III
Diagram 3 Rajah 3
(a) What is meant by salt? Apakah yang dimaksudkan dengan garam?
………………………………………………………………………………
………………………………………………………………………………
[1 mark] [1 markah]
(b) (i) Draw the diagram for step II in the box provided. Lukis gambar rajah untuk langkah II di dalam kotak yang disediakan.
[2 marks] [2 markah]
(ii) What is the purpose of carrying out step II? Apakah tujuan melakukan langkah II?
………………………………………………………………………
[1 mark] [1 markah]
For
Examiner’s
Use
3(b)(ii)
3(a)
3(b)(i)
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(c) (i) Name the acid used. Namakan asid yang digunakan.
………………………………………………………………………
[1 mark] [1 markah]
(ii) Write the chemical equation for the reaction. Tuliskan persamaan kimia untuk tindak balas tersebut.
………………………………………………………………………
[2 marks] [2 markah]
(d) The chart shows the reaction of zinc sulphate and metal X. Carta menunjukkan tindak balas antara zink sulfat dengan logam X.
(i) Suggest a name for metal X. Cadangkan nama untuk logam X.
………………………………………………………………………
[1 mark] [1 markah]
(ii) What is observed when aqueous ammonia is added in excess to
zinc sulphate solution? Apakah yang diperhatikan apabila ammonia akueus ditambah kepada larutan
zink sulfat sehingga berlebihan?
………………………………………………………………………
………………………………………………………………………
[2 marks] [2 markah]
3(d)(ii)
3(c)(i)
Zinc sulphate Zink sulfat
X sulphate + zinc X sulfat + zink
+ X
3(d)(i)
3(c)(ii)
For
Examiner’s
Use
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4 Vinegar is aqueous ethanoic acid. The concentration of ethanoic acid in the
vinegar was determined by titrating the vinegar with 0.10 mol dm-3
sodium
hydroxide solution using phenolphthalein as an indicator. The result of the
experiment is shown in Table 4.
Cuka adalah larutan asid etanoik. Kepekatan asid etanoik dalam cuka ditentukan melalui
pentitratan dengan 0.10 mol dm -3
larutan natrium hidroksida dengan menggunakan fenoftalein
sebagai penunjuk. Keputusan eksperimen di tunjukkan dalam Jadual 4.
The following equation represents the reaction: Persamaan berikut mewakili tindak balas tersebut:
CH3COOH + NaOH CH3COONa + H2O
Titration I
Penitratan I Titration II Penitratan II
Titration III Penitratan III
Initial burette reading / cm3
Bacaan awal buret 0.00 23.40 0.00
Final burette reading / cm3
Bacaan akhir buret 23.40 47.00 23.50
Volume of NaOH used / cm3
Isipadu NaOH digunakan
Table 4 Jadual 4
(a) Ethanoic acid is a weak acid.
What is meant by weak acid? Asid etanoik adalah asid lemah.
Apakah dimaksudkan dengan asid lemah.
………………………………………………………………………………
………………………………………………………………………………
[1 mark] [1 markah]
(b) State the colour change of phenolphthalein at the end point. Nyatakan perubahan warna fenolftalein pada takat akhir.
………………………………………………………………………………
[1 mark] [1 markah]
(c) (i) Complete Table 4 by calculating the volume of sodium hydroxide
solution used in each titration Lengkapkan Jadual 4 dengan menghitung isipadu larutan natrium hidroksida
yang digunakan dalam setiap pentitratan. [1 mark]
[1 markah]
For
Examiner’s
Use
4(c)(i)
4(a)
4(b)
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(ii) Calculate the average volume of 0.10 mol dm-3
of sodium
hydroxide solution used to neutralize 25.00 cm3 of vinegar.
Hitung isipadu purata larutan natrium hidroksida 0.10 mol dm-3
yang digunakan
untuk meneutralkan 25.00 cm3 cuka.
[1 mark] [1 markah]
(d) (i) Calculate the number of moles of sodium hydroxide used to
neutralize 25.0 cm3 of vinegar.
Hitung bilangan mol natrium hidroksida yang digunakan untuk meneutralkan
25.00 cm3 cuka.
[1mark] [1 markah]
(ii) Calculate the concentration of ethanoic acid in the vinegar. Hitung kepekatan asid etanoik dalam cuka..
[3 marks] [3 markah]
4(c)(ii)
4(d)(i)
4(d)(ii)
For
Examiner’s
Use
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(e) The experiment is repeated using 0.10 mol dm-3
of barium hydroxide to
replace sodium hydroxide.
Predict the volume of barium hydroxide solution required to neutralize
25.00 cm3 of vinegar.
Explain your answer.
Eksperimen diulangi menggunakan larutan barium hidroksida 0.10 mol dm-3
menggantikan larutan natrium hidroksida..
Ramalkan isipadu larutan barium hidroksida yang diperlukan untuk menutralkan 25.00 cm
3 cuka.
Terangkan jawapan anda.
………………………………………………………………………………
………………………………………………………………………………
[2 marks] [2 markah]
4(e)
For
Examiner’s
Use
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5 In an experiment, 50.0 cm3 of hydrogen peroxide solution is mixed with 1.0 g of
manganese(IV) oxide powder. The total volume of oxygen gas liberated is
measured at 30 seconds intervals.
Table 5 shows the result of the experiment.
Dalam satu eksperimen, 50.0 cm3 larutan hydrogen peroksida di campurkan dengan 1.0g serbuk
mangan(IV) oksida. Jumlah isipadu gas oksigen yang dibebaskan diukur setiap 30 saat.
Jadual 5 menunjukkan keputusan ekperimen.
Time (s) Masa (s) 0 30 60 90 120 150 180 210
Volume of oxygen (cm3)
Isipadu oksigen (cm3) 00.00 12.50 17.50 23.00 26.00 28.00 30.00 30.00
Table 5 Jadual 5
(a) What is the function of manganese(IV) oxide? Apakah fungsi mangan(IV) oksida?
………………………………………………………………………………
[1 mark] [1 markah]
(b) Write a balanced chemical equation for the decomposition of hydrogen
peroxide. Tulis persamaan kimia seimbang bagi penguraian hidrogen peroksida.
………………………………………………………………………………
[1 mark] [1 markah]
(c) Plot a graph of the volume of oxygen gas against time on page 13. Plotkan graf isipadu gas oksigen melawan masa pada muka surat 13.
[3 marks] [3 markah]
(d) How long does it take for the decomposition of hydrogen peroxide to be
completed? Berapa lamakah masa yang diambil untuk penguraian lengkap hidrogen peroksida?
………………………………………………………………………………
[1 mark] [1 markah]
5(b)
5(d)
For
Examiner’s
Use
5(a)
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Graph of the volume of oxygen gas against time Graf isipadu gas oksigen melawan masa
5(c)
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(e) From the graph obtained in (c), calculate: Daripada graf yang diperolehi dalam (c), hitungkan ;
(i) the instantaneous rate of reaction at 30th
second. kadar tindak balas pada saat ke 30
[2 marks] [2 markah]
(ii) the average rate of reaction for the first 90 seconds kadar tindak balas purata untuk 90 minit pertama
[1 mark] [1 markah]
(f) The experiment is repeated using 2.0 g of manganese(IV) oxide. The
reaction stops at 120 seconds.
Explain. Eksperimen diulangi menggunakan 2.0 g mangan(IV) oksida. Tindak balas berhenti pada
120 saat.
Terangkan.
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
[2 marks] [2 markah]
For
Examiner’s
Use
5(e)(ii)
5(f)
5(e)(i)
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6 Diagram 6 shows the apparatus set-up to determine the heat of displacement of
copper from its salt solution by lead powder. Rajah 6 menunjukkan susunan radas untuk menentukan haba penyesaran kuprum daripada
larutan garamnya oleh serbuk plumbum.
Diagram 6 Rajah 6
50 cm3 of 0.2 mol dm
-3 copper(II) sulphate is poured into a polystyrene cup. The
initial temperature of the solution is recorded.
Excess lead powder is added into the copper(II) sulphate solution, stirred and the
maximum temperature is recorded.
Table 6 shows the result of the experiment.
50 cm3 larutan kuprum(II) sulfat 0.2 mol dm
-3 dimasukkan ke dalam sebuah cawan polistirena.
Suhu awal larutan direkodkan.
Serbuk plumbum berlebihan ditambah ke dalam larutan kuprum(II) sulfat, campuran dikacau dan
suhu tertinggi larutan direkodkan..
Jadual 6 menunjukkan keputusan eksperimen
Initial temperature / oC
Suhu awal 28.0
Maximum temperature / oC
Suhu tertinggi 33.0
Jadual 6 Table 6
(a) Give one suggestion on how the above apparatus can be improved to get a
better result. Berikan satu cadangan bagaimana radas di atas dapat diperbaiki untuk mendapatkan
keputusan yang lebih baik.
………………………………………………………………………………
[1 mark] [1 markah]
For
Examiner’s
Use
6(a)
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(b) What is meant by the heat of displacement of copper by lead? Apakah yang dimaksudkan dengan haba penyesaran kuprum oleh plumbum?
………………………………………………………………………………
………………………………………………………………………………
[1 mark] [1 markah]
(c) Write the ionic equation for the reaction. Tuliskan persamaan ion bagi tindak balas tersebut..
………………………………………………………………………………
[1 mark] [1 markah]
(d) (i) Calculate the number of moles of copper(II) ions reacted. Hitung bilangan mol ion kuprum(II) yang disesarkan..
[1 mark] [1 markah]
(ii) Calculate the amount of heat released in the experiment.
[Density of solution = 1.0 g cm-3
and specific heat capacity of
water = 4.2 J g-1o
C-1
] Hitung jumlah haba yang dibebaskan dalam eksperimen..
[ Ketumpatan larutan = 1.0 g cm 3 dan
muatan haba tentu larutan air = 4.2J g-1
oC
-1]
[1 mark]
[1 markah]
For
Examiner’s
Use
6(b)
6(c)
6(d)(i)
6(d)(ii)
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(iii) Calculate the heat of displacement of copper by lead. Hitung haba penyesaran bagi kuprum oleh plumbum.
[1 mark] [1 markah]
(e) Draw the energy level diagram for the reaction. Lukis gambar rajah aras tenaga bagi tindak balas.
[2 marks] [2 markah]
(f) What happens to the temperature change if lead powder is replaced by
magnesium powder?
Explain. Apakah berlaku kepada perubahan suhu jika serbuk plumbum digantikan dengan serbuk
magnesium?
Terangkan.
………………………………………………………………………………
………………………………………………………………………………
………………………………………………………………………………
[3 marks] [3 markah]
For
Examiner’s
Use
6(d)(iii)
6(e)
6(f)
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Section B Bahagian B
[20 marks]
[20 markah]
Answer any one question from this section. Jawab mana-mana satu soalan daripada bahagian ini..
7 (a) Diagram 7.1 shows the position of chlorine and iodine in the Periodic
Table of Elements. Rajah 7.1 menunjukkan kedudukan klorin dan iodin di dalam Jadual Berkala Unsur.
Cl
I
Diagram 7.1 Rajah 7.1
Which group does these elements belongs to?
Explain why chlorine is more reactive than iodine.
Dalam kumpulan manakah unsur ini terletak?
Terangkan mengapa klorin lebih reaktif berbanding iodin?
[4 marks] [4 markah]
(b) Diagram 7.2 shows the reaction between potassium with water. The
experiment is repeated using sodium to replace potassium.
Observations are recorded in Table 7.1
Rajah 7.2 menunjukkan tindak balas antara kalium dengan air. Eksperimen di ulangi
menggunakan natrium menggantikan kalium.
Permerhatian dicatatkan di dalam jadual 7.1
Diagram 7.2
Rajah 7.2
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Element Unsur
Proton
number Nombor proton
Observation Pemerhatian
Potassium Kalium
19
Metal moves very vigorously on the surface of
water.
Colourless solution formed and changed red litmus
paper blue. Bergerak sangat cergas di permukaan air.
Larutan tanpa warna yang terhasil menukarkan warna
kertaslitmus merah kepada biru
Sodium Natrium
11
Metal moves vigorously on the surface of water
with a „hissing‟ sound.
Colourless solution is formed and changed red
litmus paper blue. Bergerak cergas di permukaan air dengan bunyi ‘hiss’.
Larutan tanpa warna terbentuk menukarkan kertas litmus
merah kepada biru
Table 7.1
Jadual 7.1
(i) Based on the proton number, explain why both elements show
similar chemical properties. Berdasarkan nombor proton, terangkan mengapa kedua-dua unsur menunjukkan
sifat kimia yang sama.
[2 marks] [2 markah]
(ii) Write a balanced chemical equation for the reaction between
potassium and water. Tulis persamaan kima seimbang untuk tindak balas kalium dan air.
[2 marks] [2 markah]
(iii) Describe briefly why the solutions obtained in both reactions turns
red litmus paper blue. Terangkan secara ringkas mengapa larutan yang diperolehi menukarkan kertas
litmus merah kepada biru.
[2 marks]
[2 markah]
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(c) Table 7.2 shows the proton number of four elements. Jadual 7.2 menunjukkan bilangan proton bagi empat unsur..
Element Unsur
Proton Number Bilangan proton
C 6
Na 11
O 8
Table 7.2 Jadual 7.2
Explain how bonds are formed when:
Terangkan bagaimana ikatan terbentuk apabila:
(i) Na reacts with O to form a compound P. Na bertindak balas dengan O membentuk sebatian P.
(ii) C reacts with O to form a compound Q. C bertindak balas dengan O membentuk sebatian Q.
Your answer must include diagrams showing the electron arrangement of
compounds P and Q. Jawapan anda mesti termasuk gambar rajah yang menunjukkan susunan electron bagi
sebatian P dan Q.
[10 marks] [10 markah]
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8 (a) Diagram 8 shows the structural formula of chloroethene or vinyl chloride. Rajah 8 menunjukkan formula struktur bagi kloroetena atau vinil klorida.
Diagram 8 Rajah 8
(i) Vinyl chloride can undergo polymerization. Suggest a name for the
polymer formed and write a chemical equation for the reaction.
Vinil klorida boleh mengalami pempolimeran. Cadangkan satu nama bagi
polimer terbentuk dan tulis persamaan kimia untuk tindak balas
tersebut.
[2 marks] [2 markah]
(ii) Discuss the following statement: Bincang kenyataan berikut:
[3 marks] [3 markah]
(b) Ammonia and sulphuric acid are two important chemicals produced in
chemical industries.
Ammonia gas reacts with aqueous sulphuric acid to form a nitrogenous
fertilizer as shown in the equation.
Ammonia dan asid sulfurik adalah dua bahan kimia penting dihasilkan oleh industri
kimia.
Gas ammonia bertindak balas dengan asid sulfurik membentuk baja bernitrogen seperti
yang ditunjukkan oleh persamaan.
2NH3 + H2SO4 → (NH4)2 SO4
Calculate the mass of ammonium sulphate produced when an excess
ammonia gas is passed into 100 cm3 of 2.0 mol dm
-3 of aqueous sulphuric
acid solution.
[Molar mass of ammonium sulphate = 132 g mol-1
]
Hitung jisim ammonium sulfat dihasilkan apabila gas ammonia berlebihan dialirkan ke
dalam 100 cm3 asid sulfurik 2.0 mol dm
-3.
[Jisim molekul relatif ammonium sulfat = 132 g mol-1
]
[3 marks]
[3 markah]
H H
│ │
C = C
│ │
H Cl
The usage of synthetic polymer causes environmental pollution.
Kegunaan polimer sintetik menyebabkan pencemaran alam sekitar
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(c) “Pure aluminium rod is malleable while duralumin which is made of 95%
aluminium and 5% copper is not”.
Explain how the difference in the composition contributes to the difference in
properties of aluminium and duralumin.
“Rod aluminium tulen mudah dibengkokkan tetapi duralumin yang dibuat daripada 95%
aluminium dan 5% kuprum sukar dibengkokkan”
Terangkan bagaimana perbezaan komposisi membezakan sifat aluminium dan duralumin.
[5 marks] [5 markah]
(d) The equation below shows the ionization of a sodium soap molecule in water. Persamaan di bawah menunjukkan pengionan molekul sabun natrium di dalam air.
Soap becomes less effective when the cleaning is carried out in acidic water.
Explain. Sabun menjadi kurang berkesan apabila pencucian menggunakan air berasid. Terangkan.
[2 marks] [2 markah]
(e) Amphicillin is an antibiotic. Patients are advised to finish the whole course of
antibiotic prescribed even though he/she has recovered from the sickness.
Explain.
Ampisilin adalah antibiotik. Pesakit dinasihatkan untuk menghabiskan ubat tersebut
walaupun penyakitnya sudah sembuh.
Terangkan.
[3 marks] [3 markah]
(f) The structural formula of aspirin is shown below. Formula struktur aspirin ditunjukkan di bawah.
Explain why aspirin is not advisable to be prescribed to patient with gastric
problem. Terangkan mengapa aspirin tidak digalakkan kepada pesakit yang mengalami penyakit
gastrik.
[2 marks] [2 markah]
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Section C Bahagian C
[20 marks]
[20 markah]
Answer any one question from this section Jawab mana-mana satu soalan.daripada bahagian ini.
9 (a) Tin (stanum) is used to electroplate food can in industries.
Explain why food in a dented can should not be consumed.
Stanum digunakan untuk menyadur tin makanan dalam industri.
Terangkan mengapa makanan dalam tin yang kemek tidak boleh dimakan.
[4 marks] [4 markah]
(b) Diagram 9 shows two electrolytic cells using different electrodes.
Rajah 9 menunjukkan dua sel elektrolisis menggunakan elektrod berbeza.
Cell I Cell II Sel 1 Sel II
Diagram 9.1 Rajah 9.1
Compare and contrast Cell I and Cell II.
Your answer should include observation and half equation for the reaction
at both electrodes.
Bandingbezakan Sel I dan Sel II.
Jawapan anda mesti mengandungi pemerhatian dan setengah persamaan bagi tindak
balas yang berlaku di kedua-dua elektrod .
[6 marks]
[6 markah]
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(c) Based on the above statement, describe an experiment to verify the
reaction that occured is a redox reaction.
Berdasarkan kenyataan di atas, huraikan satu eksperimen untuk membuktikan tindak
balas yang berlaku merupakan tindak balas redoks.
In your description, include Penerangan anda mestilah mengandungi
Procedure
Prosedur
Confirmatory test Ujian pengesahan
Explanation on oxidation and reduction processes
Penerangan tentang proses pengoksidaan dan penurunan
Ionic equation
Persamaan ion
[10 marks] [10 markah]
The displacement of iodine, I2 from potassium iodide, KI solution
is a redox reaction
Penyesaran iodin,I2 daripada larutan kalium iodida, KI
adalah tindak balas redoks
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10 (a) Methanoic acid is used in rubber industries to coagulate latex.
It reacts with magnesium according to the following equation: Asid metanoik digunakan dalam industri getah untuk membekukan lateks. Asid ini
bertindak balas dengan magnesium mengikut persamaan berikut:
2 HCOOH + Mg → (HCOO)2Mg + H2
[Relative Atomic Mass: C=12; O=16; H=1;
molar volume of gas at room temperature and pressure is 24 dm3 mol
-1 ]
[Jisim atom relatif: C;12, O;16, H;1. isipadu molar sebarang gas pada suhu dan tekanan
bilik adalah 24 dm3 mol
-1]
(i) Calculate the maximum volume of hydrogen gas released if 50 cm3
of 0.2 mol dm-3
methanoic acid is reacted with 5 g magnesium. Hitung isipadu maksima gas hidrogen yang terbebas jika 50 cm
3 asid metanoik
0.2 mol dm-3
bertindak balas dengan 5 g serbuk magnesium. [3 marks] [3 markah]
(ii) A sweet smelling substance is formed when methanoic acid is
reacted with ethanol, C2H5OH.
Name the substance and draw the structural formula. Apabila asid metanoik bertindak balas dengan etanol, C2H5OH membentuk
ester.
Namakan dan lukis formula struktur ester tersebut [2 marks]
[2 markah]
(b) Natural rubber is obtained from rubber tree as shown in Diagram 10.1.
Aeroplane tyres as shown in Diagram 10.2 are produced by vulcanizing
the natural rubber.
Compare the following properties between natural rubber and vulcanized
rubber
Elasticity
Heat resistance
Explain the differences Getah asli diperolehi dari pokok getah seperti ditunjukkan dalam Rajah 10.1. Tayar
kapalterbang seperti dalam Rajah 10.2 dihasilkan melalui penvukanan getah asli.
Bandingkan sifat berikut antara getah asli dan getah tervulkan.
Kekenyalan
Tahan haba
Terangkan perbezaan tersebut. [5 marks] [5 markah]
Diagram 10.1 Diagram 10.2
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(c) Alcohol can undergo dehydration process as follows: Alkohol boleh mengalami proses pendehidratan seperti berikut:
Describe a laboratory experiment to carry out the dehydration of a named
alcohol. Huraikan satu eksperimen untuk menjalankan proses pendehidratan bagi satu alkohol
yang dinamakan.
Your answer should include: Jawapan anda mesti mengandungi:
Procedure Prosedur
Equation Persamaan
Confirmation of product Pengesahan hasil
[10 marks] [10 markah]
END OF QUESTION PAPER KERTAS SOALAN TAMAT
Hydrocarbon Hidrokarbon
Alcohol Alkohol
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INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON
1. This question paper consists of three sections: Section A, Section B and Section
C. Kertas soalan ini mengandungi tiga bahagian: Bahagian A, Bahagian B dan Bahagian C..
2. Answer all questions in Section A. Write your answers for Section A in the
spaces provided in the question paper. Jawab semua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yang
disediakan dalam kertas soalan.
3. Answer one question from Section B and one question from Section C. Write
your answers for Section B and Section C on the lined pages at the end of the
question paper. Answer questions in Section B and Section C in detail. You may
use equations, diagrams, tables, graphs and other suitable methods to explain your
answer. Jawap satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Tuliskan
jawapan bagi Bahagian B dan Bahagian C pada halaman bergaris di bahagian akhir kertas
soalan ini. Jawab Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakan
persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan
anda..
4. Show your working, it may help you to get marks. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah.
5. If you wish to cancel any answer, neatly cross out the answer. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.
6. The diagrams in the questions are not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.
7. Marks allocated for each question or part question are shown in brackets. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam
kurungan.
8. The time suggested to complete Section A is 90 minutes, Section B is 30 minutes
and Section C is 30 minutes Masa yang dicadangkan untuk menjawab Bahagian A ialah 90 minit, Bahagian B ialah 30 minit
dan Bahagian C ialah 30 minit.
9. You may use a non – programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.
10. Hand in all your answer sheets at the end of the examination. Serahkan semua kertas jawapan anda di akhir peperiksaan.
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4541/3
Chemistry
Paper 3
September
2008
1½ hours
MAKTAB RENDAH SAINS MARA
SIJIL PELAJARAN MALAYSIA
TRIAL EXAMINATION
2008
CHEMISTRY
Paper 3
One hour and thirty minutes
DO NOT OPEN THIS QUESTION BOOKLET UNTIL BEING TOLD TO DO SO
For Examiner’s Use
Question Full
Mark Mark
1 33
2 17
Total 50
This question booklet contains 10 printed pages including the front page.
1. Write down your name and class in
the space provided Tuliskan nama dan kelas anda pada ruang
yang disediakan.
2. The question booklet is bilingual.
Buku soalan ini adalah dalam dwibahasa.
3. Candidates are required to read the
information at the back page of the
question booklet. Calon dikehendaki membaca maklumat di
halaman belakang kertas soalan ini.
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1 An experiment was conducted to determine the position of different metals in
Electrochemical Series.
Diagram 1.1 shows the set-up of apparatus used and copper is the positive
terminal in all experiment. Satu eksperimen dijalankan untuk menentukan kedudukan logam berbeza dalam Siri
Elektrokimia.
Rajah 1.1 menunjukkan susunan radas yang digunakan dan kuprum adalah terminal positif
dalam semua eksperimen.
Diagram 1.1 Rajah 1.1
Experiment is repeated using different pairs of metals.
Diagram 1.2 shows the voltmeter reading for all experiments. Eksperimen diulangi menggunakan pasangan logam berbeza.
Rajah 1.2 menunjukkan bacaan voltmeter bagi semua eksperimen.
Mg / Cu
Reading:.......................... V Bacaan:
Fe / Cu
Reading:.......................... V Bacaan:
Zn / Cu
Reading:.......................... V Bacaan:
Pb / Cu
Reading:.......................... V Bacaan:
Diagram 1.2 Rajah 1.2
For
Examiner’s
Use
Copper Kuprum
Porous pot Pasu berliang
Magnesium
0.5 mol dm-3
copper(II) sulphate kuprum sulfat
0.5 mol dm-3
magnesium sulphate magnesium sulfat
Magnesium
1(a)
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(a) Record the voltmeter readings in the spaces provided. Catatkan bacaan voltmeter pada ruang yang disediakan.
(b) Construct a table and record the potential difference for each experiment. Bina sebuah jadual untuk menunjukkan beza keupayaan bagi setiap eksperimen .
(c) Complete the Table 1.1 based on the experiment Lengkapkan Jadual 1.1 berdasarkan eksperimen itu.
The way to manipulate
variable: Cara mengubah
pembolehubah
dimanipulasikan:
What to observe in the
responding variable: Apa yang diperhatikan dalam
pembolehubah bergerakbalas
The way to maintain the
controlled variable: Cara menetapkan
pembolehubah dimalar.
Table 1.1 Jadual 1.1
1(c)
For
Examiner’s
Use
1(b)
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(d) State the hypothesis for this experiment. Nyatakan hipotesis bagi eksperimen ini
........................................................................................................................
........................................................................................................................
(e) Cell in Diagram 1.1 is left for 5 minutes.
Complete the following Table by stating the observations and related
inferences in the experiment. Sel dalam Rajah 1.1 dibiarkan selama 5 minit.
Lengkapkan Jadual berikut dengan menyatakan pemerhatian dan inferens yang
berkaitan dalam eksperimen tersebut.
Observations Pemerhatian
Inferences Inferens
(f) Based on the observations, arrange all the metals in ascending order of their
electropositivity Berdasarkan pemerhatian, susun kesemua logam itu mengikut tertib menaik
keelektropositifan
........................................................................................................................
(g) Based on the cell in Diagram 1.1, classify the ions present in both
solutions into cations and anions. Berdasarkan sel dalam Rajah 1.1 kelaskan ion-ion yang terdapat dalam kedua-dua
larutan kepada kation dan anion.
1(d)
1(f)
For
Examiner’s
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1(g)
1(e)
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(h) State the operational definition of a chemical cell. Nyatakan definisi secara operasi bagi sel kimia
........................................................................................................................
........................................................................................................................
(i) A potential difference of 1.5 V is observed when the experiment is
repeated by using an unknown metal, R and copper.
Predict the position of metal R in the Electrochemical Series. Beza keupayaan sebanyak 1.5 V dihasilkan apabila eksperimen diulangi menggunakan
suatu logam yang tidak diketahui , R dan kuprum.
Ramalkan kedudukan logam R dalam Siri Elektrokimia.
........................................................................................................................
(j) If cell using Zn/Cu is left for 2 hours, state the colour change of copper(II)
sulphate solution. Sekiranya sel menggunakan Zn/Cu dibiarkan selama 2 jam, nyatakan perubahan warna
larutan kuprum(II) sulfat.
........................................................................................................................
1(h)
1(i)
1(j)
For
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2 Diagram 2.1 shows two types of bonfire using sticks and logs. Rajah 2.1 menunjukkan 2 jenis unggun api menggunakan ranting kayu dan batang kayu.
During camping, a group of students discovered that it is easier to start a bonfire
using sticks rather than logs. This is due to the differences in the size Semasa berkhemah, sekumpulan pelajar telah mendapati bahawa lebih senang untuk
menghidupkan unggun api menggunakan ranting kayu berbanding batang kayu. Ini disebabkan
oleh perbezaan saiz.
Bonfire using sticks Unggun api menggunakan ranting
Bonfire using logs Unggun api menggunakan batang kayu
Diagram 2.1 Rajah 2.1
Referring to the above situation, plan a laboratory experiment to investigate the
effect of size of reactant on the rate of reaction between calcium carbonate and an
acid. Merujuk kepada situasi di atas, rancangkan satu eksperimen dalam makmal untuk mengkaji
kesan saiz bahan tindak balas terhadap kadar tindak balas antara kalsium karbonat dengan asid.
Your planning should include the following: Perancangan anda haruslah mengandungi perkara-perkara berikut :
(i) Statement of Problem
Pernyataan masalah
(ii) All the variables Semua pembolehubah
(iii) Statement of hypothesis Pernyataan hipotesis
(iv) List of substances and apparatus
Senarai bahan dan alat radas
(v) Procedure of the experiment Prosedur eksperimen
(vi) Tabulation of data Penjadualan data
[17 marks]
END OF QUESTION PAPER [Kertas Soalan Tamat]
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CONFIDENTIAL 4541/3
4541/3©Copyright Reserve MARA 8 [See Next Page
CONFIDENTIAL
SPACE FOR YOUR ANSWERS / RUANG JAWAPAN
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For
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CONFIDENTIAL 4541/3
4541/3©Copyright Reserve MARA 9 [See Next Page
CONFIDENTIAL
SPACE FOR YOUR ANSWERS / RUANG JAWAPAN
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CONFIDENTIAL 4541/3
4541/3©Copyright Reserve MARA 10 [See Next Page
CONFIDENTIAL
INFORMATION FOR CANDIDATES
MAKLUMAT UNTUK CALON
1. This question paper consists of two questions. Answer all questions. Kertas soalan ini mengandungi dua soalan. Jawab semua soalan
2. Write your answers for Question 1 in the spaces provided in the question paper. Tuliskan jawapan bagi Soalan 1 dalam ruang yang disediakan dalam kertas soalan.
3. Write your answers for Question 2 on the lined pages at the end of the question
paper in detail. Tuliskan jawapan bagi Soalan 2 pada halaman bergaris di bahagian akhir kertas soalan ini
dengan terperinci
4. Show your working, it may help you to get marks. Tunjukkan cara mengira kerana ia boleh membantu anda mendapatkan markah.
5. If you wish to cancel any answer, neatly cross out the answer. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.
6. The diagrams in the questions are not drawn to scale unless stated. Rajah yang terdapat dalam soalan tidak dilukis mengikut skala kecuali dinyatakan sebaliknya
7. Marks allocated for each question or part of the question are shown in brackets. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan.
8. The time suggested to complete Question 1 is 45 minutes and Question 2 is 45
minutes. Masa yang dicadangkan untuk menjawab Soalan 1 ialah 45 minit dan Soalan 2 ialah 45 minit.
9. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak diprogramkan.
10. Hand in all your answer sheets at the end of the examination. Serahkan semua kertas jawapan anda di akhir peperiksaan.
Marks awarded Pemberian markah
Score
Skor
Description
Penerangan
3 Excellent : The best response Cemerlang : Respons yang paling baik
2 Satisfactory : An average response Memuaskan : Respons yang sederhana
1 Weak : An inaccurate response Lemah : Respons yang kurang tepat
0 No response or wrong response Tiada respons atau respons yang salah