spm chemistry trial 2009 kelantan

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4541/1Kimia Nama Pelajar : ………………………………………………….Kertas 1September Tingkatan : ............................................................................20091 ¼ jam

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUASEKOLAH MENENGAH MALAYSIA

CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009SIJIL PELAJARAN MALAYSIA

KIMIA

Kertas 1

Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini adalah dalam dwibahasa

2. Setiap soalan mengandungi kedua-dua bahasa Inggeris dan bahasa Melayu. Bahagian atas dalam bahasa Inggeris dan diikuti di bawahnya oleh bahasa Melayu

3. Calon dikehendaki membaca maklumat di halaman 2.

Kertas soalan ini mengandungi 31 halaman bercetak

http://spmchem.blogspot.com/

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INFORMATION FOR CANDIDATES

1. This question paper consists of 50 questions.

2. Answer all questions.

3. Answer each question by blackening the correct space on the answer sheet.

4. Blacken only one space for each question.

5. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the space for the new answer.

6. The diagrams in the questions provided are not drawn to scale unless stated.

7. You may use a non-programmable scientific calculator.

MAKLUMAT UNTUK CALON

1. Kertas soalan ini mengandungi 50 soalan.

2. Jawab semua soalan

3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.

4. Hitamkan satu ruangan sahaja bagi setiap soalan.

5. Sekiranya anda hendak menukarkan jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan jawapaan yang baru.

6. Rajah yang mengirimi soalan tidak dilukis mengikut skala kecuali dinyatakan.

7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan

Question 1 to Question 50 are followed by four options A, B, C or D.Choose the best option for each question and blackened the corresponding space onthe objective answer sheet.

Bagi Soalan 1 hingga Soalan 50, tiap-tiap soalan diikuti oleh empat pilihan jawapan A, B, Cdan D. Pilih satu jawapan yang terbaik bagi tiap-tiap soalan dan hitamkan ruangan yangsepadan pada kertas jawapan objektif anda





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1 Diagram 1 shows the atomic symbol of element XRajah 1 menunjukkan simbol atom bagi unsur X

X199

Diagram 1Rajah 1

Which of the following represents 19?Antara berikut, apakah yang diwakili oleh angka 19?A Proton number

nombor protonB Nucleon number

nombor nukleonC Number of neutrons

bilangan neutronD Number of electrons

bilangan elektron

2 Given the formulae for aluminium ion is Al3+ and sulphate ion is SO42- . Choose the correct

chemical formula of alumminium sulphate.Diberi formula ion aluminium ialah Al3+ dan ion sulfat ialah SO4

2- . Pilih formula kimia yangbetul bagi aluminium sulfat.

A Al(SO4)3

B Al2(SO4)3

C Al3(SO4)2

D AlSO4

3 Which of the characteristics indicates that chromium is a transition element?Ciri-ciri yang manakah menunjukkan kromium ialah unsur peralihan?

A It can form a basic oxide.Ianya boleh membentuk oksida bes.

B It can conduct electricity.Ianya boleh mengalirkan arus elektrik

C It has a high melting point.Ianya mempunyai takat lebur yang tinggi

D It can form coloured solution.Ianya boleh membentuk larutan berwarna.





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4 Diagram 2 shows the position of atom X in the Periodic Table.The electron arrangement of atom X is 2.8.y.Rajah 2 menunjukkan kedudukan atom X di dalam Jadual berkala.Susunan elektron bagi atom X ialah 2.8.y

X

Diagram 2Rajah 2

What is the value of y?Apakah nilai y

A 1B 3C 5D 7

5 Neon gas does not react with other elements becauseGas neon tidak bertindak balas dengan unsur lain kerana

A exists as monoatomic gaseswujud sebagai gas monoatom

B always combines with itselfsentiasa bergabung dengan diri sendiri

C has stable octet electron arrangementmempunyai susunan elektron octet yang stabil

D has stable duplet electron arrangementmempunyai susunan elektron duplet yang stabil





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7 Which solution shows the highest pH value?Larutan manakah menunjukkan nilai pH tertinggi?

A 0.5 mol dm-3 sulphuric acid0.5 mol dm-3 acid sulfurik

B 0.5 mol dm-3 ethanoic acid .0.5 mol dm-3 asid etanoik .

C 0.5 mol dm-3 aqueous ammonia0.5 mol dm-3 ammonia akueous

D 0.5 mol dm-3 sodium hydroxide solution0.5 mol dm-3 larutan natrium hidroksida

6. Table 1 shows the information about the electrical conductivity of substances P, Q and R.Jadual 1 menunjukkan maklumat tentang kekonduksian elektrik bagi bahan P, Q dan R.

Which of the following statements is true ?Di antara pernyataan berikut, yang manakah benar ?

Substance P Q RDoes the solid substance conductelectricity? X X

Does the molten substance conductelectricity? X

A Solid P and molten P contain free mobile ions.Pepejal P dan leburan P mengandungi ion-ion bebas bergerak

B Solid Q and molten Q contain atoms.Pepejal Q dan leburan Q mengandungi atom-atom.

C There are no ions in solid R.Di dalam pepejal R tidak terdapat ion-ion.

D Molten R contains free mobile ions.Leburan R mengandungi ion-ion bebas bergerak.

Table 1Jadual 1





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8 Substance X + Sulphuric acid → Salt Y + Water + Carbon dioxide Bahan X asid sulfuric Garam Y Air Karbon dioksida

Referring to the equation above, what could substance X be?Merujuk persamaan diatas , apakah kemungkinan bahan X ?

A Coppe(11) oxideKuprum(II) oksida

B Magnesium metalLogam magnesium

C Zinc carbonateZink karbonat

D Sodium hydroxideNatrium hidroksida

9 Which of the following is a coloured salt?Antara berikut yang manakah suatu garam berwarana?

A Iron(II) sulphateFerum(II) sulfat

B Silver nitrateArgentum nitrat

C Lead(II) nitratePlumbum(II) nitrat

D Calcium carbonateKalsium karbonat

10 The equation in Diagram 3 represents the reaction in the industrial preparation of ammonia.Persamaan di dalam Rajah 3 mewakili tindak balas penghasilan ammonia dalam industri.

Diagram 3 Rajah 3

What is catalyst M?Apakah mangkin M?

AIronFerum

BNickelNikel

CCopper(II) oxideKuprum(II) oksida

DManganese(IV) oxideMangan(IV) 0ksida

Catalyst MN2 + 3 H2 2NH3

450oC/ 60 atm





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11 Which of the following is a property of ceramic objects?Antara berikut yang manakah sifat bahan seramik?

A Good heat conductorsPengalir haba yang baik

B Withstand heat betterSangat tahan haba

C Good electrical conductorsPengalir elkektrik yang baik

D Does not withstand compressionKurang tahan mampatan

12.

The following statements are related to the collision theory of a reactionPernyataan-pernyataan berikut adalah berkaitan dengan teori perlanggaran suatu tindakbalas.

Which of the following combination is true about the effect of the concentration on thereactant particles?Antara kombinasi berikut yang manakah benar tentang kesan kepekatan ke ataszarah-zarah bahan tindak balas

I The total surface area of the reactant particles increasesJumlah luas permukaan zarah-zarah bahan tindak balas bertambah

II The kinetic energy of the reactant particles increasesTenaga kinetik zarah-zarah bahan tindak balas bertambah

III The number of the reactant particles per one unit of volume increasesBilangan zarah-zarah bahan tindak balas per satu unit isipadu bertambah

IV The frequency of the collision between the reactant particles increasesFrekuensi perlanggaran antara zarah-zarah bahan tindak balas bertambah

A I and II onlyI dan II saha

B II and III onlyII dan III sahaja

C I and IV only I dan IV sahaja

D III and IV only III dan IV sahaja





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13 Which of the following is not a characteristic of a catalyst?Antara yang berikut, yang manakah bukan ciri mangkin?

A A catalyst is specific in its reactionMangkin adalah khusus dalam tindak balasnya

B A catalyst inflauences the quantity of product of reactionMangkin mempengaruhi kuantiti hasil tindak balas

C The chemical property of a catalyst remains unchanged at the end of the reactionSifat kimia mangkin tetap tidak berubah di akhir tindak balas

D Only a little amount of a catalyst is needed to influence the rate of reactionHanya sedikit mangkin diperlukan untuk mempengaruhi kadar tindak bala

14 Esters are used as food flavourings.Which of the following is a property of an ester?Ester digunakan sebagai perisa makanan.Antara berikut, yang manakah sifat ester?

A Soluble in waterLarut dalam air

B Low boiling pointTakat didih rendah

C More dense than waterLebih tumpat daripada air

D Can conduct electricityBoleh mengkoduksikan arus elektrik

15 The following chemical equation shows the preparation of ethanol in the laboratory.Persamaan kimia berikut menunjukkan penyediaan etanol di dalam makmal.

yeast C6H12O6 2C2H5OH + 2CO2

What is the name of the process shown by the above equation?Apakah nama proses yang ditunjukkan di atas?

A OxidationPengoksidaan

B DehydrationPendehidratan

C FermentationPenapaian

D HydrogenationPenghidrogenan





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The structural formulae of two molecules P and Q are as follows.Formula struktur bagi molekul P dan Q adalah seperti berikut

H H H H H

H – C – C – H H – C – C – C – H

H OH H H OH

P Q

16

Which statement is true of both molecules P and Q?Pernyataan yang manakah benar bagi kedua – dua molekul P dan Q?

A They have different functional groupsKedua – duanya mempunyai kumpulan berfungsi yang berlainan

B All their physical properties are similarSemua sifat fiziknya sama

C All their chemical properties are differentSemua sifat kimianya berbeza

D They can be represented by the same general formulaKedua – duanya boleh diwakili oleh satu formula am yang sama

17 The following is the half equation of a reaction.Berikut adalah setengah persamaan bagi satu tindak balas.

Cl2 + 2e 2Cl-

What is meant by reduction reaction based on the equation?Apakah yang dimaksudkan dengan tindak balas penurunan perdasarkan persamaan itu?

A Electrons are received by chlorineElektron diterima oleh klorin

B Electrons are donated by chlorineElektron diderma oleh klorin

C Electrons are received by chloride ionsElektron diterima oleh ion klorida

D Electrons are donated by chloride ionsElektron diderma oleh ion klorida





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18 Which substance is an oxidising agent?Bahan manakah yang merupakan agen pengoksidaan?

A ZincZink

B Sulphur dioxide gasGas sulfur dioksida

C Potassium bromide solutionLarutan kalium bromida

D Acidified potassium dichromate(VI) solutionLarutan kalium dikromat(VI) berasid

19 Which of the following chemical equations represents the reaction of preparation of soap?Diantara persamaan kimia berikut, yang manakah mewakili tindak balas penyediaan sabun?

A Ethanoic acid + ethanol ethyl ethanoate + waterAsid etanoik + etanol etil etanoat + air

B Oil + sodium hydroxide glycerol + sodium palmitateMinyak + natrium hidroksida gliserol + natrium palmitat

C Glucose + yeast ethanol + carbon dioxideGlukosa + yis etanol + karbon dioksida

D Alkylbenzene sulphonic acid + sodium hydroxide sodium alkylbenzene sulphonate +waterAsid alkilbenzena sulfonik + natrium hidroksida natrium alkilbenzena sulfonat + air

20 Why detergents more effective than soaps?Kenapakah detergen lebih berkesan berbanding dengan sabun?

A Detergents are biodegradable whereas soaps are non biodegradble.Detergen boleh terbiodegradasi manakala sabun tidak terbiodegradasi.

B Detergents reduce the surface tension of water, whereas soaps do not.Detergen merendahkan ketegangan permukaan air manakala sabun tidak merendahkanketegangan permukaan air.

C Detergents do not form scum in hard water, whereas soaps do.Detergen tidak membentuk kekat didalam air liat manakala sabun membentuk kekat.

D Detergents are soluble in grease, whereas soaps are insoluble in grease.Detergen larut dalam gris manakala sabun tidak larut dalam gris.





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21 Diagram 4 shows the electron arrangement of atom Z.Rajah 4 menunjukkan susunan elektron bagi atom Z.

Diagram 4 Rajah 4

How many protons are there in the nucleus of atom Z?Berapakah bilangan proton yang terdapat dalam nukleus atom Z?A 2B 3C 5D 7

22 An advertising light is filled with 1800 cm3 of neon gas at room condition. Calculate thenumber of neon atom in the light?[1 mol gas occupies the volume of 24 dm3 at room temperature and pressure, AvogadroNumbers = 6.02 x 1023]Sebiji lampu iklan telah diisi dengan 1800 cm3 gas neon pada keadaan bilik. Hitungbilangan atom bagi gas neon dalam lampu itu?[1 mol gas menepati isipadu sebanyak 24 dm3 pada suhu dan tekanan bilik, nomboravogardo = 6.02 x 1023]

A 4.515 x 1022

B 4.515 x 1023

C 8.03 x 1022

D 8.03 x 1021

Z





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24 Diagram 6 shows the electron arrangement of a compound formed between atoms X and atomY.Rajah 6 menunjukkan susunan elektron bagi sebatian yang terbentuk di antara atom X danatom Y

Diagram 6Rajah 6

Which of the following statements is true about this compound?Yang manakah di antara pernyataan berikut benar tentang sebatian ini

A It is an ionic compound.Ia merupakan sebatian ion

B The compound conducs electricity.Sebatian ini boleh mengkonduksikan arus elektrik

C The compound has high melting point.Sebatian ini mempunyai takat lebur yang tinggi

D The compound is formed by the sharing of electrons.Sebatian terbentuk melalui perkongsian elektron





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25 Diagram 7 shows the set up of the apparatus for the electrolysis of molten lead(II) oxide.Rajah 7 menunjukkan susunan radas bagi elektrolisis leburan plumbum(II) oksida.

What are the products formed at the anode and the cathode?Apakah hasil yang terbentuk pada anod dan katod?

AnodeAnod

CathodeKatod

A LeadPlumbum

OxygenOksigen

B OxygenOksigen

LeadPlumbum

C HydrogenHidrogen

OxygenOksigen

D OxygenOksigen

HydrogenHidrogen

26. Copper (II) sulphate solution is electrolysed using copper electrodes. What can beobserved at the anode and cathode after 30 minutes?Larutan kuprum(II) sulfat dielektrolisiskan menggunakan elektrod kuprum. Apakah yangdiperhatikan pada anod dan katod selepas 30 minit?

Anode Cathode

A Copper plate becomes thinnerPlat kuprum menjadi nipis

Copper plate becomes thickerPlat kuprum menjadi tebal

B Copper plate becomes thinnerPlat kuprum menjadi nipis

Gas bubbles are releasedGelembung-gelembung gas terbebas

C Copper plate becomes thickerPlat kuprum menjadi tebal

Copper plate becomes thinnerPlat kuprum menjadi nipis

D Gas bubbles are releasedGelembung-gelembung gas terbebas

Copper plate becomes thickerPlat kuprum menjadi tebal

Diagram 7Rajah 7





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27. Table 2 shows the observation of electrolysis of a substance using carbon electrode .Jadual 2 menunjukkan pemerhatian bagi elektrolisis suatu bahan menggunakan elektrodkarbon.

ElectrodeElektrod

ObservationPemerhatian

AnodeAnod

A greenish-yellow gas releasedGas berwarna kuning kehijauan terbebas

CathodeKatod

A colorless gas which burns with a ‘pop’ sound is releasedGas yang tidak berwarna dan terbakar dengan bunyi pop terbebas

The electrolyte maybeElektrolit itu mungkin

ADilute hydrochloric acidAsid hidroklorik cair

BConcentrated potassium chloride solution.Larutan kalium klorida pekat

CCopper (II) chloride solution.Larutan kuprum (II) klorida

DConcentrated magnesium bromide solutionLarutan magnesium bromide pekat.

28 Which of the following statement correctly describes a strong alkali?Antara pernyataan berikut, yang manakah betul tentang alkali kuat ?

IHas a low pH valueNilai pH yang rendah

IIIonises completely in waterMengion dengan lengkap dalam air

IIIHas a high concentration of hydroxide ionsMempunyai kepekatan ion hidroksida yang tinggi

IVExist as molecules in waterWujud sebagai molekul dalam air

A I and III dan II

B I and IVI dan 1V

C II and IIIII dan III

D III and IVIII dan IV

Table 2Jadual 2





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29 Diagram 8 shows a method of preparing insoluble salt by mixing solution X and solution Y.Rajah 8 menunjukkan suatu kaedah penyedian garam tak terlarutkan melalui campuranlarutan X dan larutan Y.

Diagram 8Rajah 8

What is the type of the reaction shown in Diagram 8.Apakah jenis tindak balas ditunjukkan dalam Rajah 8.

A Neutralisation reactionTindak balas peneutralan

B Substitutiuon reactionTindak balas penukar gantian

C Precipitation reactionTindak balas pemendakan

D Addition reactionTindak balas penambahan

Solution X Larutan X

Solution Y Larutan Y

SaltGaram

Mixing two solutionCampuran dua larutan

Filter and rinseTuras dan bilas

DryKeringkan

Salt crystals





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30 Diagram 9 shows the stages I, II, III and IV in the Contact Process during the preparationof sulphuric acid.Rajah 9 menunjukkan peringkat I, II, III dan IV bagi penyediaan asid sulfurik melaluiProses Sentuh.

S I SO2 II SO3 III H2S 2O7 IV H2SO4

Diagram 9Rajah 9

Which of the following chemicals is used at each stage I and IV?Antara bahan kimia berikut, yang manakah digunakan pada peringkat itu?

I IVA O2 H2OB O2 SO2

C H2O O2

D H2O SO2

31 Diagram 10 shows the structural formula of a carbon compound.Rajah 10 menunjukkan formula struktur bagi suatu sebatian karbon.

H H O H H

H – C – C – C – O – C – C – H

H H H H

Diagram 10Rajah 10

The compound is produced by the reaction betweenSebatian ini terhasil daripada tindak balas antara

A ethanol and propanoic acidetanol dengan asid propanoik

B ethanol and butanoic acidetanol dengan asid butanoik

C propanol and ethanoic acidpropanol dengan asid etanoik

D butanol and ethanoic acidbutanol dengan asid etanoik





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32. The equation below represents the reaction between calcium carbonate and hydrochloricacid.Persamaan di bawah mewakili tindak balas antara kalsium karbonat dengan asidhidroklorik.

CaCO3(s) + 2HCl (aq) CaCl2(aq) + H2O(l) + CO2(g)

Which of the following graphs shows the changes of volume of carbon dioxide againstthe time of reaction?Antara graf berikut, yang manakah betul bagi menunjukkan perubahan isipadu gaskarbon dioksida terhadap masa tindak balas?

A

B

C

D

Volume CO2/cm3

Isipadu CO2/cm3

Time/minMasa/min

Volume CO2/cm3

Isipadu CO2/cm3

Volume CO2/cm3

Isipadu CO2/cm3

Volume CO2/cm3

Isipadu CO2/cm3

Time/minMasa/min

Time/minMasa/min

Time/minMasa/min





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33 The following equations represent the displacement reactions between metals P, Q and R.Persamaan berikut mewakili tindak balas penyesaran antara logam P, Q and R.

Reaction 1 : P + Q2+ P2+ + QTindak balas 1

Reaction 2 : R + P2+ R2+ + PTindak balas 2

Which of the following statements is true about the reaction?Antara berikut pernyataan yang manakah benar tentang tindak balas itu?

A P is more electropositive than QP lebih elektropositif daripada Q

B P and R are oxidising agentsP dan R merupakan agen pengoksidaan

C The descending sequence of metals’ reactivity is R, Q, PSusunan menurun kereaktifan logam ialah R, Q, P

D P2+ and Q2+ are reducing agents while R2+ is oxidising agentP2+ dan Q2+ merupakan agen penurunan manakala R2+ merupakan agen pengoksidaan





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34 Diagram 11 shows the apparatus arrangement that is used to study the transfer of electronsat a distance.Rajah 11 menunjukkan susunan radas yang digunakan untuk mengkaji pemindahanelektron pada satu jarak.

Diagram 11Rajah 11

What colours can be observed at the ends of carbon rod X and carbon rod Y at the end ofthe experiment?Apakah warna yang dapat diperhatikan di hujung rod karbon X dan rod karbon Y padaakhir eksperimen itu.

Rod X Rod YA Yellow Colourless

Kuning Tidak berwarnaB Yellow Green

Kuning HijauC Green Orange

Hijau PerangD Green Purple

Hijau Ungu

Iron (II) sulphate solutionLarutan ferum(II) sulfat

Acidified potassiumdichromate(VI) solutionLarutan kalium dikromat(VI)berasid

Dilute sulphuric acidAsid sulfurik cair

Carbon rod XRod karbon X

Carbon rod YRod karbon Y





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351. The following equation shows the reaction between Ag+ and Cl- ions.Berikut adalah persamaan bagi tindakbalas antara ion Ag+ dan ion Cl- .

Ag+ + Cl- → AgCl ∆ H = - 65 kJmol-1

Which of the following is true about the above equation ?Antara berikut yang manakah benar tentang persamaan diatas ?

A Endothermic reaction occursTindakbalaas endotermik berlaku

B Heat is released to the surroundingsHaba dibebaskan ke persekitaran

C The temperature of the product decreasesSuhu hasil tindakbalas berkurang .

D 65 kJ of heat absorbed when 1 mole of silver chloride is formed .65 kJ haba diserap apabila 1 mol argentum klorida terbentuk .

36 9.75 g of element X reacted with 63.5 g of element Y to form a compound with the formula XY2.What is the relative atomic mass of element X?.[Given that the relative atomic mass of Y=127]9.25 g unsur X bertindak balas dengan 63.5 g unsur Y untuk membentuk satu sebatian yang mempunyai formula XY2.Berapakah jisim atom relatif unsur X?[Diberi jisim atom relatif Y=127]

A 23

B 39

C 40

D 88





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39 What can be deduced from the symbol 2713 Al?

Apakah yang dapat disimpulkan dari symbol 2713 Al?

I The electron arrangement of aluminium atom is 2.8.3Susunan elektron bagi atom aluminium ialah 2.8.3.

II Aluminium atom has 13 protons and 27 neutrons.Atom aluminium mempunyai 13 proton dan 27 neutron.

III Aluminium atom has a proton number of 27 and 14 neutrons.Atom aluminium mempunyai nombor proton 27dan 14 neutron.

IV The total number of proton and neutron of aluminium atom is 27.Jumlah bilangan proton dan neutron atom aluminium ialah 27.

A I and IIIB II and IVC II and IIID I and IV

40 Diagram 12 shows the electron arrangement of ion T.Rajah 12 menunjukkan susunan elektron bagi ion T

Diagram 12 Rajah 12

Where is element T placed in the Periodic Table?Dimanakah unsur T ditempatkan di dalam Jadual Berkala?

GroupKumpulan

PeriodKala

A 17 2B 18 2C 2 18D 2 17





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41 Diagram 13 shows the formation of sodium ion.Rajah 13 menunjukkan pembentukan ion natrium.

Diagram 13Rajah 13

Which of the following statements are true?Kenyataan berikut yang manakah benar?

ISodium atom has an unstable electron arrangement.Atom natrium mempunyai susunan elektron yang tidak stabil

IISodium ion has an octet electron arrangement as in neon atom.Ion natrium mempunyai susunan elektron oktet seperti gas neon.

IIISodium atom donates an electron to form a positive charge ion.Atom natrium menderma satu elektron untuk membentuk ion bercas positif

IVSodium atom reacts with non-metals atoms to form ionic compounds.Atom natrium bertindak balas dengan atom bukan logam membentuk sebatian ion.

A I and III only

B II and III onlyC I, III and IV onlyD I, II, III and IV





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42 Table 3 shows the result of an experiment for three simple voltaic cells.Jadual 3 menunjukkan keputusan suatu eksperimen bagi tiga sel ringkas.

Positive terminal Negative terminal Voltage (V)W X 0.3Y X 0.8X Z 1.9

The arrangement of the metals in the electrochemical series in descending order ofelectropositivity isSusunan logam-logam mengikut keelektropositifan dalam siri elektrokimia mengikuturutan menurun adalah

A W, Z, X, YB Y, W, X, ZC Y, W, Z, XD Z, X, W, Y

43 Table 4 shows information about three simple voltaic cell.Jadual 4 menunjukkan maklumat tentang tiga sel ringkas.

Voltaic cell Electrodes used Voltage (V)P Iron and Zinc 0.2Q Zinc and magnesium 1.6R Copper and magnesium 2.6

What is the potential difference of the voltaic cell which consists of copper and ironelectrodes?Apakah nilai voltan bagi sel yang mengandungi elektrod kuprum dan ferum ?

A 0.4B 0.6C 0.8D 2.4

Table 3Jadual 3

Table 4Jadual 4





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44 The equation shows the reaction between sulphuric acid and potassium hydroxide.Persamaan menunjukkan tindakbalas di antara asid sulfurik dan kalium hidroksida.

H2SO4 + 2KOH K2SO4 + 2H2O

What is the volume of 1.0 mol dm-3 potassium hydroxide solution which can neutralise25.0 cm3 of 1.0 mol dm-3 sulphuric acid?

Berapakah isipadu 1.0 mol dm-3 larutan kalium hidroksida yang boleh meneutralkan25.0 cm3 1.0 moldm-3 asid sulfurik ?

A 12.5 cm3

B 25.0 cm3

C 50.0 cm3

D 70.0 cm3

45 You are required to verify the cation and anion in a sample of ammonium chloride salt solution. What substance can you use to verify the cation and anion?Anda dikehendaki mengesahkan kation dan anion dalam satu samapel larutan garam ammonium klorida.Apakah bahan yang anda boleh gunakan untuknmengesahkan kaatioana dan anion?

CationKation

AnionAnion

A Nessler reagentReagen Nessler

Dilute nitric acid and silver nitrateAsid nitrik cair dan argentums nitrat

B Nessler reagentReagen Nessler

Dilute hydrochloric acid and barium chlorideAsid hidrokloreik cair dan barium klorida

C Potassium thiocyanateKalium tiosianat

Dilute nitric acid and silver nitrate Asid nitrikcair dan argentums nitrat

D Potassium thiocyanateKalium tiosianat

Dilute hydrochloric acid and barium chlorideAsid hidrokloreik cair dan barium klorida





SULIT

47 Diagram 14 shows the set up of the apparatus for an experiment to determine the rate ofreaction between sodium thiosulphate and sulphuric acid.Rajah 14 menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindakbalas antara natrium tiosulfat dengan asid sulfuric.

Diagram 14 Rajah 14

Which of the following combination of the conditions take shortest time for the mark X to disappear from sight?Antara kombinasi keadaan berikut yang manakah mengambil masa paling singkatuntuk tanda X hilang daripada penglihatan?

Sulphuric acidAsid sulfurik

Sodium Thiosulphate solutionLarutan natrium tiosulfat

VolumeIsipadu(cm3)

ConcentrationKepekatan(mol dm-3)

VolumeIsipadu(cm3)

ConcentrationKepekatan(mol dm-3)

TemperatureSuhu(oC)

A 5 1.0 50 0.4 30

B 5 1.0 50 0.4 40C 5 0.5 50 0.4 30D 10 0.5 45 0.4 40

Sodium thiosulphate solution andsulphguric acidNatrium tiosulfat dan asid sulfurik

White paperKertas putih

Mark XTanda X





SULIT

48 Table 6 shows the heat of combustion of three alcohols .Jadual 6 menunjukkan haba pembakaran bagi tiga alkohol.

AlcoholAlkohol

Heat of combustion / kJmol-1

Haba pembakaran /kJmol-1

CH3OH -710C2H5OH -1370C4H9OH -2670

Which of the following factors increases the heat of cobustion of alcohols ?Antara faktor berikut , yang manakah menambahkan haba pembakaran alkohol ?

A Size of molecules decreasesSaiz molekul berkurang

B Number of carbon atoms per molecule increasesBilangan atom karbon per molekul bertambah

C Number of oxygen atoms per molecule increasesBilangan atom oksigen per molekul bertambah

D Number of hydrogen atoms per molecule decreasesBilangan atom hidrogen per molekul berkurang





SULIT

49 Diagram 15 shows energy level diagrams for the reaction between hydrochloric acidand potassium hydroxide .Rajah 15 menunjukkan gambarajah aras tenaga untuk tindakbalas antara asidhidroklorik dan kalium hidroksida .

Diagram 15Rajah 15

Calculate the amount of heat released when 50 cm3 of 2 mol dm-3 hydrochloric acidreacts with 50 cm3 of 2 mol dm-3 potassium hydroxide solution.Hitungkan jumlah haba yang dibebaskan apabila 50 cm3 asid hidroklorik 2 mol dm-3

bertindak balas dengan 50 cm3 larutan kalium hidroksida 2 mol dm-3

A 5.40 kJB 10.8 kJC 27.0 kJD 54.0 kJ

H+ + OH-

H 2 O

- 54 kJ mol-1

EnergyTenaga





SULIT

50 The following equation shows the combustion of heptane, C7H16 in excess oxygen.Persamaan berikut menunjukkan pembakaran heptana, C7H16 dalam oksigenberlebihan.

C7H16 + 11O2 → 7CO2 + 8H2O H = - 5512 kJ mol-1

In an experiment the combustion of heptane in excess oxygen releases 1378 kJ energy.What is the mass of heptane used?Dalam satu eksperimen pembakaran heptana dalam oksigen berlebihan membebaskan1378 kJ tenaga.Berapakah jisim heptana yang digunakan?[Relative atomic mass : H = 1; C = 12][Jisim atom relatif: H = 1 ; C = 12 ]

A 25.0 gB 36.0 gC 77.0 gD 88.0 g

END OF QUESTION PAPERKERTAS SOALAN TAMAT



Kimia Nama pelaiar :Kertas 2

SULIT

September Tingkatan20092% jzm

454y2

JABATAN PELAJARAN KELANTANDENGAN KERJASAMA

PERSIDANGAN KEBANGSAAN PENGETUA.PENGETUASEKOLAH MENENGAII MALAYSIA

CAWANGANKELANTAN

PEPERIKSAAN PERCUBAANSIJIL PELAJARAN MALAYSIA 2OO9

KIMIAKERTAS 2

Masa : f)ua Jam Tiga Puluh Minit

JANGAN BUKA KERTAS SOALAN INI SETIINGGA DIBERITAHU

Arahan:1. Kertas soalan ini adalah dalam

dwibahasa2. Setiap soalan mengandungi kedua-

dua bahasa Inggeris dan bahasaMelayu. Bahagian atas dalam bahasaInggeris dan diikuti di bawahnya olehbahasa Melayu

3. Calon dibenarkan menjawabkeseluruhan atau sebahagian soalansamada dalam bahasa Melayu ataubahasa Inggeris

4. Calon dikehendaki membacamaklumat dihalaman 2.

Kod Pemeriksa

Bahagian SoalanMarkahPenuh

MarkahDiperolehi

A

I l 02 10J 10AT l 05 96 l l

B 7 208 20

C9 20

_ r0 _]-_ 20umlah

Kertas soalan ini mengandun gi 22halaman bercetak'I Lihat Sebelah

SULIT

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SUI,IT

INFORMATION FOR CANDIDATES

I . This question papcr consists of thrcc scctions: Section A, Section B and Section C.

2. Answcr all qucstions in Section A. Write your answcrs for section A in the spacc providcd

in the qucstion papcr.

3. Answer one question l iorn Section B and one question from Section C.

4. Write your answer fbr Scction B and Scction C on the "helaian tambahan" .

5. The diagrams in the questions are not drawn tcr scale unless stated.

6. Mark allocated for each question or part qucstion arc shown in brackcts.

7. The tirne suggested to answers Section A is 90 minute, Section B is 30 trinute and Scctiort

C is 30 minutc

8. You may use a non-prograrnrnable scienti l lc calculator.

MAKLUMAT KEPADA CALON

l. Kertas soalan ini mengandungi tiga bahagian: Bahagian A, Bahugiun B don Buhugiun C.

2. Jawab se,nua soalun dalam Bahagiun A. Tuliskttn jawopan unda unluk Bahugiun A dulutn

ruang yang disediakan cJalam kertu.s :;oalan.

3. Jawob stttu soalun daripatla Bahagiun B dun sattr soalon daripadu Bahugian C.

4. Tuliskan.jawapan anda bagi Bahagian B dan C padct helaian larnbahon.

5. Rajah yang mengiringi soalan tidak dilukis mengikut skala secuali dinyotaketn.

6. Markah yang diperuntukkan bagi setiap soalan qtau ceraian soalan dituniukkan dttlttnt

kurungan.

7. Masa yang dicadongl:an untuk menjawab Bahctgian A ialuh 90 minit, Ilohagian B -10 ninit

dan Bcthagian C iuJuir -i() ninit.

8. Anda dibenarkan rnenggunakan kalkuletor saintfik yang liduk bolch diprogrontkun.

( 2 )

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454t t2

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SULIT ( 3 )

Section A

[60 marks]

160 markahl

454112

Answcr al l qucst ions,lawub senruu 'sttulun

Diagram I shows the information about two types of solutions A and B which are used to carry

out titration with hydrochloric acid.Ra.iah I menttnjtrkkan maklunnl tentattg cluct jenis lartrlon A dan B yang digunakan unttrk

menj alankcm pentitrQtdn dengttn as id hidroklorik'

Solut ion A : 50 cm'r of 1.0 mol dm-] sodium hydroxide, NaOH

Lartrtan A : 50 cmr natrhtm hidroksicla, NaOH I '0 mol dm-''

Solution B : 50 cm'r of L0 rnol dm-l atnmoniurn hydroxide' NHaOH

Lttrrt lttn B : 50 cmr omntonit* hiclrok'siclu,NHlol1 l '0 mol dm-'

Diagram IRajah I

(a) (i) What arc thc typcs of solutions A and B.Apakuh.jeni,s lurulon A dan B.

( ii) State the formula of ion that present in both solutions'/N),atuk(tn./brmula ion vang hadir di dalam kedua-dua lQrutan'/

B, i f the pH value of Solut ion A isB jika nilai pH I'arutan A aclnlah

I mark)ll rnarkahl

ll mark)l1 markahl

t4 .14 .

( i i i ) Predict the pH value of Solut ionRanrulkan nilui PH hugi Larulan

f l markll1 mevkahl

Lihat SebelahSULIT

PERCUBAAN SPM {2009) - KIMIA KERTAS 2



SULIT ( 4 )

Why thcre is different in pH value of Solution A and B?Mengapakah terdapat perbezaan nilai pH di antara Lanttan A dqn B?

4541t2

( iu)

(b)

(c)

12 marksl[2 markah]

Write the chemical equation between Solution A and hydrochloric acid.Tuliskan persamaan kimia antctra Larutan A dengan ol;icl hidroklorik.

1z-iaiil12 markah)

Calculate the volume of 0. I mol clm-l hydrochloric acid, HCI solution needed to neutraliseSolution A.Hitungkan isipaclu larutan asid hidroklorik 0.1 mol dm-l yang cliperlukttn untukmeneutralkan Larutan A.

13 marksl[3 markah)

Diagram 2 shows part of the Periodic Table of the Elements. C, D, E, F, G, and H do not

represent the actual symbol of the elements.Rajah 2 menunjukkan sebahagian daripada Jadual Berkala Unsttr. C, D, E ,F,G dan H tidak

mewakili simbol sebenar unsur-unsur berkenaan.

Diagram2Rajah 2

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suLIT (s ) 4s4r t2

Using the letters in the Periodic Table of the Elements in Diagram 2, answer the following

questions.b"rgon menggunakan huruJ--huyu.rang terdapat dqlam.IaduAl Berkala pada Rajah 2,

j awab soalan-slalan berikut.

(a) State the position of element C in the Periodic Table.Nyatakan kedudukan unsur C dalam JaduQl Berkala.

[2 maik]12 markahl

(b) Elcmcnt D rcact with water to produce alkaline solution and hydrogen gas.(Jnsur D bertindek balas dengan eir untuk menghasilkan larulan beralkctli dan gas

hidrogen.Write the chemical equation of the reaction.Tuliskan persamaan kimia bagi tindak balas ini.

(c) D and G have the same chemical properties.D dan G mempunyai sifat-sifat kimia yang sama.

(i) Which element is more reactive?(Jnsur yang manakah yang lebih reaktiJ?

(ii) Explain your answcr in (c) (i).Terangkan jawupan anda dalam (c) (i).

(d) (i) Which element is chemically inert ?(Jnsur yang manakah lengai secara kimia ?

12 marksl

[2 markah]

11 mark)I markahl

[2 marks]12 markahl

11 markl

I markahl

SebelahSULIT

PERCUBMN SPM (2009)- KIMIAKERTAS 2


I Lihat


SULIT

1-)-

( 6 )

( i i ) Explain your answer in (d) ( i )Terangkan f awdp(ut andct clalqtn (d) (i).

4541t2

11 t r rut l , )

l l t r t t t r ku l t j 1

Zinc plate / Kcpingan .: lr i i

Z inc sulphatc s<l lu t ionLuulurt zink sulJht

(e) State one specia l character is t ic : o l -e lernents I INyalakan sulu ciri isl imewtt unsur ft.

l l t t t , t t ' l i l

[ | t t tor l iulr l

Diagrarn 3 shows par t of thc sct up of a l lpara lus o1- a c l rcr r r ica l ce l l .Rc1jah 3 nrcnunjrtklicrn se bcthttgittn cluripudu susutten rutlu.; bugi .sucttu scl kitttiu.

Colrlrcr platc / Kcpittgotr kultrttrrr

Pttrtrtts pot I l)tt.: ' tr ht'r ' l i tut,!

Cop; ler( I I ) sLr lphl te sol r r l ionItrt't t I cttt li u prr r n t ( I [ ) .s rr I f u t

Diagranr 3I?t.riuh 3

(a) Draw a comple lc sct -up of apparatus fbr the chcnr ica l cc l l or r [ ) iaqrarr r 3.Ltrkiskun su.\un(u1 roda,s 1:ung lengkt4t ltttgi .stl kittriu ltuclu llolalr 3.

| | t t t t r r l t I| | t r rur l ' t r l t l

(b) Labcl thc ncgat ivc c lcct rodc as ( - )and posi t i i , 'c c lcct roc ic as { ' l - )on thc conrplc te( lchcnr ica l cc l l .Lctbelkun clcktrocl ncga/if ' ,scbugui ( - 1dun clcktrod positif saktgdi ( t ) lt i tcltt t ' tt j ,r lt.sclkimia vang lelah lengkup.

l1 ntur l i l

l \ nrur fur l t l(c) State tlre flow of electron for thc chernical cell in diagrarn 3.

l,'lr,atakan arah pengttliran elektron bugi sel kintitt ltutlu tlttjuh 3.

l l murk l

Lihat SebelahSULITPERCUBAAN SPM (2009) . KIMIA KERTAS 2



S T I L I T ( 1 )

(d) What is thc function of the porotls pot uscd in the above chclnical ccll?

Apukah /imgsi pasu berliang )'}ang digunakan dalam sel kimia di atas?

(e) What can you observed at the negative electrode'/

tlpuktth yttng boleh ctncla perhttlikan paclu elektrod negutiJ'?

(i i) Give thc reasot.ts for your answcr.

Bt'rikun scluh fiagi .,urr',r1'un unJu

l l marklntarkahl

l1 nturkl

ll marktth)

ll murkll1 markahl

l l mork)l l nurkulr ,

nsing mctals A, B and C as thc clcctrodckimia menggunqkan logam A,B dan C

u

4541l2

Lihat SebelahSULIT

( f ) wr i te hal f equat ion lbr the d ischarged of ions at posi t ive e lect rode.

Ttiiskan persamaon setengah bagi ion yang clidiscrts podo eleklrrtd positi/.

l1 murkfl l markahf

(g) ( i ) I f thc coppcr p latc in thc chcnr ica l cc l l abovc is rcp laccd by s i lvcr mcta l , what wi l l

happen to thc vol tage reading of the cel l '

Jika kepingan kupntm di dalam ,sal kimict tli atas digontikan dengon logam

Qrgenntm, apakoh vctng berlaktr lrcpada nil(li t,oltQn yang alcan terhctsil.

( h ) ' fab lc 3 shows thc vol tagc of chcmical cc l l

Jadrral 3 menuniukkan nilai voltan hugi sel

sebagoi elektrod.

Pairs of mctal

J:pgt:sgr, tggglJ-B / C

Vol tagc (V)

aibr,"plelJll)0 .1

I 'osit ivc clcctrodc

_Els!!te4]!,'L!1_C

A / C 0 . 8 C

Table 3Jqdual 3


PERCUBAAN SPM (2009) . KIMIA KERTAS 2


SULIT ( 8 ) 454u2Based on thc information givcn, calcuiatc thc voltagc of a chemical cell using metal Aand B as the electrodes,Berdasarkan kepada maklumat yang diberikan, himngkan nilai voltan yang akandihasilkan oleh sel kimia yang menggunakan logam A dan B ,rebagai elektrod.

[2 marks]

[2 markah)

Diagram 4. I shows the set up of apparatus fbr an experiment to determine the empiricalformula of magnesium oxide.Raiah 4.1 menunjukkan susunan radas bagi suulu eksperimen untuk menentukan.fbrmulaempirik magnes ium oks ida.

Li,-1tDentitti.y.,

(-lnrcrble

ilfrrxgxirip3r:crr

(a) What is the meaning of empiricalA pakah ma k ud formu I a e mp i r ik?

Diagram 4.1Rajah 4.1

formula?

I marklfl ntarkahl

Ivlagne snrm ribb.:nhla nragne.num

Lihat SebelahSULITPERCUBAAN SPM (2009) - KIMIA KERTAS 2

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SUL IT (9 ) 4s4 r t 2

(b) Diagram 4.2 shows the results of thc cxperiment.Rajah 4.2 menuniukkan keputttsatt experiment itLt.

Mass of crucible + l id : 24.8R o

Jisint ntangkuk pijar -r penutttP

Mass of crucibtc + lid + magnesiurr ribbon : 25.12 g

Jisim mangktft pijar + pentttttp * pita magncsium

Mass of crucible + l id + magnesium oxide : 25.28 g

Jlsim mcmgkuk piiar + penutltp + magnesium oksida

Diagrarn 4.2Rajah 4.2

Based on Diagrarn 4.2, complete Table 4 and deternrine the empirical formula of

magnesium oxide.Berclasarkun Rujuh 4.2, le ngkaltkctn Judual 4 dan selcnrsnyu lentukan formulaempirik bagi magnesium olcsirla:

[Refat ive atorn ic mass: O : 16, Mg:24]

fJisim utom relotif. O - 16, Mg - 2al

ElcrncntLJnsur

Mg o

Mass (g)Ji,s intNurnber of molesBilangan molSir-nplcst latio of molesNisberh ringkas bilangan mol

E,mpirical formulaIiormulu empiric

Table 4Jctduol 4

16 murk's)f6 markuh)

(ii) Writc thc chcmical cquation for thc rcaction in the experiment.Tulislran persamaan kimia bagi titrdak balas dalam eksperimen itu.

11 murkl11 markah)

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( i )

PERCUBAAN SPM (2009) . KIMIA KERTAS 2



su l rT (10) 454r t2

(c) Why the proccss of heating, cooling and wcighing are repcated until a constant rnass isobtained?Mengapakah proses pct ldnasan, perr')ejuka,r dun pcnitnbangun dirtlang.schingga.iisim

.va,1g telap d ipe ro I ehi'?

l l murk)

ll nrurkult)(d) Why this cxpcrimcrrt is not suitablc to bc uscd to dctcrnrinc thc cmpirical lbrrnula of

copper( l l ) ox ide ' iMe.ngatrtakah ekperinten ini tidak sesuai cligunakan rrnluk ntencnlrrkun.fbrmt.tlo emstirikkupmm(ll) oksida't

L I t?rcrrKs )l l murktth)

Diagram 5 shows thc sct up of thc apparatus of an cxpcrinrcnt to invcstigatc thc lransfbr ol

electrons at a distance. Solution X is an oxidising agent and turns colour from purplc to

colourless solution after a few minutes reacted.Rajah 5 menunjukkan susltnan radas eksperimen bagi nengkaji peminduhctn elelrtrcn pctda

sutu.jaruk. Larutan X ialah agen pengoksi.daan dan berlukar vnarnu dari ungu kepaclalarutan lidak berw,arna selepcts beberapa minit bertindak balas.

CarbonKarbon

x

CarbonKurbon

Potassium iodidc solut ionLqrulan kal ium iotlicla

Di lute sulphuric aciclAsicl sulfurik cair

Diagram 5Raiah 5

Lihat SebelahSULITPERCUBAAN SPM {2009). KIMIAKERTAS 2



SULIT

The overall ionic equation for thePersamaan ion keselnnthan bagi

( l 1 )reaction istindak balas yang berlaht adalah

454112

2 M n O a - + l 6 H * + l 0 l - * 2 M n 2 * + 8 H 2 O

State the name of Solution X

ltiyalukan numu larutun X

+ 5 lz

(a)

( l r )

11 marklllmarkahl

Cal :lte the oxidation number of manganese in MnOq- ion.

I t, iungkan nombor pcngoksidaan bagi mangan dalam ion MnOq

[1 mark]

l lmarkahl(c) State thc typc of rcaction that occurs at elcctrode A'

Nltatakan jenis tindakbalas yang berlaku pada elektod A-

I marklllmarkahl

Referring to the reaction that takes place at electrode B.

Menjuk kepada tindak balas yang berlaktt poda elektrod B'

(i) State the observation?l{yatakon pemerhatian'/

( i i i )

[1 mark]

llmarkahlWrite the half equation for the reaction.Tulis setengah persamaan bagi tindakbalas.

; ,Lt mqrK)

llmarkah)Explain the reaction that occttrs in terms of transfer of electron.

Terangkan tindak balas yang berlaku dari segi pemindahan elektron-

[1 mark)

ll markahl

( t l )

( i i )


PERCUBAAN SPM (2009} - KIMIA KERTAS 2



SUL IT (12 ) 4s4 r t 2

(e) State the function of the dilute sulphuric acid in tltis expcrimcnt.Nyatakan fnngsi bagi asid sulJirik cair dalam eksperimen ini.

ll rnarkfllrnarkahl

(0 In other eiperiment you arc given zinc strip, copper strip, coppcr(ll) sulphate solutionand all apparatus requircd.Draw a labelled diagrarn to show another sct up of apparatus to investigatc thc transfcr ofelectron at a distance.Di dalam eksperimen lain andq dibekalkan dengan kepingan zink, kepingetn kupnrnt,larutan kuprum(Il) sulfat dan semua radas yang diperlukan.Lukiskan sattt gambarajah berlabel untukrnenunjukkan susunan rados bagi ntcnliiascttpemindahan elektron pada sat u .i arak.

12 marksl[2 markahl

I Lihat SetrelahSULIT

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SUL IT (13 ) 454112

6 The thermochemical cquation below represcnts the combustion reaction of an alcohol in theair.Persamaan termctkimia ctibawah ntewakili tindak balas pembakurcut sttnttt ulkohol eli trderrcr.

C+HqOH + 60: + 4CO2 + 5H2O LH:-2679 kJmol- '

(a) (i) State the name of the alcohol in the above equation.

Nyatakan name elkohol di clalam persamaan di ateu'

[1 ntarkl

f lmarkahl(ii) What is mcant by'AH : -2679 kJ mol-r ' in thc abovc cquation'l

Apakah yang dimaksudkan dengan'AH: -2619 kJ tnol-'\' dalam persamaandi atas?

l l markl

Imarkah)(b) 0.37g of thc alcohol that is natlcd in (a), uscd to hcat 500 g of water.

0.37g atkohol yang dinamakan di (a), digunakan unhrk memanaskan 500 g air.

Calculate,Ilitungkan,

(i) thc heat rclcascd by thc alcohol in thc reaction.

[Molar mass of thc a lcohol :74 g nro l r ]

haba yang dibebaskan oleh qlkohol itu dalqm tindQk balas

lJisim molar alkohol : 74 gmoltJ

(ii) the temperature change of water expected in the experiment in (b)

fSpecific heat capacity of water: 4.2 J g' ' "C-' lperubahem suhu etir yang chjangkakan dalam eksperimen ini-

lHaba lenlu air; 4.2 J g' ' "C'')

l l markll lmarkahl

12 marksl[2rnarkahl

Lihat SebelahSULIT


PERCUBMN SPM (2009) - KIMIA KERTAS 2


su rT ( r4) 454y2(c) Draw the energy levcl diagram for the combustion of thc alcohol.

lnkiskqn gamhar rclah ara.s tenugu unluk Stenbakqran ulkohol ter.-ehut.

12 mark,tl12marlurh)

(d) ' l 'ab lc 6 shows thc heat of combust ion of var ious a lcohols.

Jadual 6 menuniukkan hctba pembakqran pelbagai ulkohol.

Table 6Jadual 6

( i ) Predict the heat of combust ion of propanol.Rqmalkan haba pembakaran bagi propanol.

11 nturklll markah)


Numbcr ofcarbon atomsBilangun atont

karbon

Molecular formulaFormulu molehul

Name of alcoholNama alkohol

Heat ofcombustion

Habu pcmhakaran(kJ mol-')

CHrOH Methanol -726) Cu HsOH Ethanol -131 6J c.r["l70t'l Propanol{+j

C 4 I I 9 O I I -2679" " " -- J J J JC s H r r O H Pentanol




SI IL IT (15 ) 4s41 t2

(ii) Based on Table 6, explain why as the number of carbon atotns incrcases so does the

value of heat of con, bustion.Berdasarkan Rajah 6, terangkan mengapq apabila bilangun atom kqrbon

bertambah nilai haba pentbakaran juga bertambah.

12 marks)

12markah)





SULIT ( 1 6 )

Section B

[20 marks][20 markahl

Answer any one questionJawab mane-mane salu soalan

4541t2

Lihat SebelahSULIT

1 Diagram 7 shows the symbols which represent three elements, W, X andRajah 7 meru.rnjukkan simbol yang mewakili tiga unsur\N,X dan Y.

Diagram 7Rajah 7

Based on Diagram 7, answer the fbllowing questions:Berdasarkan Rajah 7, jawub soalon-soctlan berikut:

What is represented by number 12 and 6 in tlre symbol of elernent W?Apakah yang rliwakili oleh angka 12 dan 6 dalum simbol bagi un,sur W'/

12 marksl

12 ntctrkultfDraw thc structurc o1'l in akrur of thc clcr-ncrrt X using tho modern atornic model.Lukis struktur dlunt lrdgi trtt.\'i.u'X dengan trrenggttnakan model atom utoden.

f4 nrurksl

[4 ntarkah)Atoms W and X can form chernical bonds with atom Y.Alom W dqn X boleh membenltrk ikalan kimia dengan atom Y.

State the type of chenricul bond ancl explain how the bond is formed between:Nyulukun jenis ikctlan kimirr dan terangkun bagaintuna ikulun terbenluk onlora:(i) Atoms W and Y

Atom\N dan Y

( i i ) Atoms X anC YAlctm X dan Y

110 murlisl110 rnarkahl

(a)

(b)

(c)




SULIT (17 ) 454U2(d) Describe the differences in melting point or electrical conductivity of the cornpound

formed in (c) (i) and the compound formed in (c) (ii).Huraikan perbezaan dalam takat lebur utau kekonduksian elektrik bctgi sebatian yungterbentuk d, (cXj) dan bagi sehatian yang terbentuk di (c)(ii).

[4 marl<sl14 markahl

8 (a) Ethene gas is bubble through bromine water.Gas etena dialirkan melalui air bromin.

(i) What is the observation and state the type of reaction happens?Apakah pemerhatian dan nyatakan jeni.s tindak balas yang berlaku?

(ii) Give the name and draw the structure formula of the molecule of the product.Berikan nama dan lukis formula struktur bagi molekul hasil tindak balas.

[4 marks][4 markahl

(b) A hydrocarbon Z contains 82.75o/o of carbon by mass.Satu hidrokarbon Z mengandungi 82.75% korbon mengihtt jisim.[Rclative atomic nrass: H:l , C:12]lJisim atom relatif: H=1, C:l2l

(i) Calculate the empirical formula of Z.Hitungkan Jbrmula empirik Z.

(ii) Determinc the molecular fomrula of Z if rclative molecular mass of Z is 58.Tentukan .formula molekul bagi Z jika jisim molekul relatif Z odakrh 58.

[7 marksl[7 markah]

(c) Compare the properties of vulcanised rubber and unvulcanised rubber.Bandingkan silat-si/Al getah tervulkan dan getah tak lervulkan.

Your answer should include the following properties of rubber:Jcrwapan anda hendeklah mengandungi sifat-sifot getah berikut:

(i) ElasticityKekenyalan

(ii) Strength and hardnessKekuatan dan kekerasan

(iii) Resistance toward oxidationKe t ahan an t erha d ap p engo ks idaan

Give the reasons for all the properties above.Berikan sebab bagi semua sifat-sifat di atas.

19 marksl[9 markahl

I Lihat SebelahSULITPERCUBAAN SPM (2009) - KIMIA KERTAS 2



STI I , IT ( 1 8 )

Section Cl

[20 nrarks]l)0 murkuhl

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[ 9 m l r ks ]

It) ntttt ' l i t thl

Lihat SebelahSI. ILIT

PFRCUBAAN SP[1 1:]irOe) - Kll"11A KERIAS 2



STIL IT ( i 9 1 1511 t2( i i ) [3y us ing a la l tc lcc l c l iagr l r t r o f ' thc ar lanqci r . rcut r r l - l r tours inr .o r r rc ta l ur t r , l i ts l l lor , : ; .

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i l i ' t t , g t t t t - l { ) r ' n r r l r ' r r l I

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i l . i l r a l Scbc l i r h

S T ' I , I ' TPERCUBAAN SPNl (2009) - K I I \1 IA KFRTAS 2



SULIT (20 )

(a) (i) Refening to Experiment II, state the name of acid T used'write the chemical equation for the reaction of acid T with magnesium.Merujuk Ektperimenll, nyatakan nama asidT yang digunakan'Tuli.skan persamaan kimia bagi tiruJak balas asidT dengan magnesium.

(ii) Draw an energy profile diagrarn for thc reaction in l0(aXi).On the energy profile diagram show the:

Explain the energy profile diagram

Lukis satu gambar raiah profrl tenagu untuk tindak bulus di l0(a)(i)'Pada garnbar raiah profil tenaga itu tunjukkan:

Jetaskan gambar rajah profil tenaga itu.

454u2

[2 marks]12 markahl

|0 marksl

110 markahl

Lihat SebelahSULIT




SULIT

(b)

( 21 )

The graph in Diagram l0 shows the results of Experimcnt I and Experiment II.Graf pada Rajah l0 menttnjukkan keputusan bagi Eksperimen I dan Eksperimen

Volume of hydrogen gasicmlIs iputlu gus hidrogen/cmr

454U2

II

Lihat SebelahSULIT

Tirne /sMasa/s

Diagram l0Raiah l0

Based on the graph:Berdasarkan graf(i) Calculate the average rate of reaction for Experiment I

Hitungkan kadar tindak balas purata bagi Eksperimen I

[2 marks][2 markah]

(ii) Explain the difference in the rate of reaction between Experiment I and Experiment Il.Terangkan perbezaan kadar tindak balas qntara Eksperimen I dengan El<sperimen lI.

[6 marks]

[6 markah]

END OF QUESTION PAPER

Experiment II

Experiment IEksperimen I

PERCUBMN SPM (2009) - KrMrA KERTAS 2



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r l g l l l




4541/3 [Lihat SebelahSULIT

1

4541/3Kimia Nama Pelajar : ..............................................................................Kertas 3September Tingkatan :.................................................................................20091 ½ jam


CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009SIJIL PELAJARAN MALAYSIA

KIMIA

Kertas 3

Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Kod Pemeriksa

SoalanMarkahPenuh

MarkahDiperolehi

1 33

2 17

JUMLAH 50

1. Kertas soalan ini adalah dalamdwibahasa.

2. Setiap soalan mengandungi kedua-duabahasa Inggeris dan bahasa Melayu.Bahagian atas dalam bahasa Inggeris dandiikuti di bawahnya oleh bahasa Melayu

3. Calon dibenarkan menjawab keseluruhanatau sebahagian soalan samada dalambahasa Melayu atau bahasa Inggeris

4. Calon dikehendaki membaca maklumat dihalaman 2 dan 3

Kertas soalan ini mengandungi 12 halaman bercetak





2

INFORMATION FOR CANDIDITES

1. This question paper consists of two questions. Answer all questions.

2. Write your answers for Question 1 in the spaces provided in the question paper.

3. Write your answers for Question 2 on the “helaian tambahan”. You may use equation, diagrams, tables, graphs and other suitable methods to explain your answer.

4. Show your working, it may help you to get marks.

5. If you wish to change your answer, neatly cross out the answer that you have done. Then write down the new answer.

6. The diagrams in the questions are not drawn to scale unless stated.

7. Mark allocated for each question or part question are shown in brackets.

8. The time suggested to answers Question 1 is 45 minutes and Question 2 is 45 minutes.

9. You may use a non-programmable scientific calculator.

10. Hand your answer sheets at the end of the examination.

Marks awarded:

Mark Description3210

Excellent : The best responseSatisfactory : An average responseWeak : An inaccurate responseNo response or wrong response





3

MAKLUMAT KEPADA CALON

1. Kertas soalan ini mengandungi dua soalan. Jawab semua soalan.

2. Tulis jawapan bagi Soalan 1 dalam ruang yang disediakan dalam kerta soalan.

3. Tulis jawapan bagi Soalan 2 pada kertas helaian tambahan yang disediakan. Andaboleh menggunakan persamaan, rajah, jadual, graf dan cara lain yang sesuaiuntuk menjelaskan jawapan anda.

4. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah.

5. Sekiranya anda hendak menukarkan jawapan, batalkan dengan kemas jawapan yangtelah dibuat. Kemudian tulis jawapan yang baru.

6. Rajah yang mengiringi soalan tidak dilukis mengikut skala secuali dinyatakan.

7. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalamkurungan.

8. Masa yang dicadangkan untuk menjawab Soalan 1 ialah 45 minit dan Soalan 2ialah 45 minit.

9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

10. Serahkan kertas jawapan anda di akhir peperiksaan.

Pemberian Markah:

Markah Penerangan3210

Cemerlang : Respon yang paling baikMemuaskan : Respon yang sederhanaLemah : Respon yang kurang tepatTiada respon atau respon salah





4

1. Diagram 1.1 shows the set-up of apparatus for an experiment to compare the reactivity ofalkali metals towards their reaction with oxygen.Rajah 1.1 menunjukkan susunan radas bagi satu eksperimen untuk membandingkereaktifan logam-logam alkali terhadap oksigen.


The experiment is carried out using a small piece of lithium, potassium and sodium respectively toreact with oxygen gas.Observations on the alkali metals in the experiment are shown in Table 1.Eksperimen dijalankan menggunakan kepingan kecil litium, kalium dan natrium secaraberturutan bertindak balas dengan gas oksigen.Pemerhatisn ke atas logam-logam alkali dalam eksperimen ditunjukkan dalam Jadual 1.

Alkali metalLogam alkali

Oxygen gasGas oksigen

Gas jarBalang gas





5

SetSet

Set-up of apparatusSusunan radas

ObservationPemerhatian

I Lithium burns slowly and produceswhite fume.

II

III

Table 1Jadual 1

White fumesWasap putih



LithiumLitium

PotassiumKalium

SodiumNatrium





6

(a) Look at the flame produced in each experiment in Table 1. Complete the Table 1 by statingthe observation for each reaction of alkali metals towards oxygen.Perhatikan nyalaan yang terhasil dalam setiap eksperimen dalam Jadual 1. LengkapkanJadual 1 dengan menyatakan pemerhatian ke atas nyalaan setiap tindak balas logamalkali dengan oksigen.

[3 marks][3 markah]

(b) Based on the experiment, complete the table below.Berdasarkan eksperimen, lengkapkan jadual di bawah.

Manipulated variable:Pembolehubah dimanipulasikan:

____________________________

____________________________

____________________________

Method to manipulate the variable:Cara memanipulasikan pembolehubah:

__________________________________________

__________________________________________

__________________________________________

Responding variable:Pembolehubah bergerak balas:

____________________________

____________________________

____________________________

How the variable is responding:Bagaimana pembolehubah ini bergerak balas:

__________________________________________

__________________________________________

__________________________________________

Fixed variable:Pembolehubah dimalarkan:

____________________________

____________________________

____________________________

Method to maintain the fixed variable:Cara menetapkan pembolehubah dimalarkan:

__________________________________________

__________________________________________

__________________________________________

[6 marks][6 markah ]





7

(c) State one hypothesis for the experiment.Nyatakan satu hipotesis bagi eksperimen itu.

………………………………………………………………………………………

………………………………………………………………………………………[3 marks]

[3 markah]

(d) Give one inference based on the results of the reaction between lithium and oxygen gas.Berikan satu inferens berdasarkan kepada keputusan tindak balas antara litium dengangas oksigen.

………………………………………………………………………………………

………………………………………………………………………………………[3 marks]

[3 markah]

(e) Based on the observation in Table 1, arrange lithium, potassium and sodium in descendingorder of reactivity towards oxygen.Berdasarkan pemerhatian dalam Jadual 1, susunkan litium, kalium dan natrium mengikuttertib kereaktifan logam terhadap oksigen secara menurun.

………………………………………………………………………………………[3 marks]

[3 markah]

(f) The experiment is repeated using a small piece of rubidium to react with oxygen.Rubidium is more reactive than lithium, potassium and sodium.Predict the observation for this experiment.Eksperimen diulangi menggunakan seketul kecil rubidium untuk ditindak balaskan denganoksigen. Rubidium lebih reaktif berbanding litium, kalium dan natrium.Ramalkan pemerhatian bagi tindak balas ini.

………………………………………………………………………………………

………………………………………………………………………………………[3 marks]

[3 markah]





8

(g) Diagram 1.2 shows the reading of pH meter when the metal oxides formed in Set I, II andIII dissolved in water.Rajah 1.2, menunjukkan bacaan meter pH apabila oksida logam yang terbentuk dalam SetI, II dan III dilarutkan dalam air.

SetSet

Set-up of apparatusSusunan radas

I

II

III


13.19pH valueNilai pH

pH meterMeter pH

Litium hydroxidesolution

Larutan litiumhidroksida


pH meterMeter pH

Potassium hydroxidesolution

Larutan natriumhidroksida


pH meterMeter pH

Sodium hydroxidesolution

Larutan kaliumhidroksida





9

(i) Record the pH value to one decimal place for Set I, Set II and Set III.Catatkan nilai pH pada satu tempat perpuluhan bagi Set I, Set II dan Set III.

Set I : ………………………………………………………………………..

Set II : ………………………………………………………………………..

Set III : ………………………………………………………………………….

[3 marks][3 markah]

(ii) Construct a table to record the pH value for Set I, Set II and Set III.Bina satu jadual untuk merekod nilai pH bagi Set I, Set II dan Set III.

[3 marks][3 markah]

(iii) State the operational definition for the alkali.Nyatakan definisi secara operasi bagi alkali.

.................………………………………………………………………………

………….………………………………………………………………………[3 marks]

[3 markah]





10

(iv) The following is a list of chemical substances with pH value:Berikut ialah senarai beberapa bahan kimia dengan nilai pH

Chemical substanceBahan kimia

pH valueNilai pH

Ammonia solutionLarutan ammonia

11

Potassium hydroxide solutionLarutan kalium hidroksida

14

Sodium hydroxide solutionLarutan natrium hidroksida

13

Classify these substances into strong alkali and weak alkali.Kelaskan bahan-bahan ini kepada alkali kuat dan alkali lemah.

[3 marks][3 markah]





11

2 Diagram 2 shows two sets, Set I and Set II, of the apparatus set-up and the results for anexperiment to study the effects of metals X and Y on the rusting of iron.Rajah 2 menunjukkan dua set, Set I dan Set II, susunan radas dan keputusan bagi satueksperimen untuk mengkaji kesan logam X dan logam Y ke atas pengaratan besi.

SetSet

Apparatus set-upSusunan radas

Result after 3 daysKeputusan selepas 3 hari

IIron nail did not rust

Paku besi tidak berkarat

IIIron nail rusted

Paku besi berkarat

Diagram 2Rajah 2

Referring to the information above, plan a laboratory experiment to investigate the effect ofnamed metals X, Y and named electrolyte Z on the rusting of iron.Merujuk kepada maklumat di atas, rancangkan satu eksperimen dalam makmal untukmengkaji kesan logam-logam X , Y yang dinamakan dan elektrolit Z yang dinamakan keatas pengaratan besi.

Electrolyte ZElektrolit Z

Electrolyte ZElektrolit Z

Iron nail/Paku besi

Iron nail/Paku besi

Metal X/Logam X

Metal Y/Logam Y





12

Your planning should include the following aspects:Perancangan anda hendaklah mengandungi aspek-aspek berikut:

(a) Problem statementPernyataan masaalah

(b) All the variablesSemua pembolehubah

(c) HypothesisHipotesis

(d) List of materials and apparatusSenarai bahan dan radas

(e) ProcedureProsedur

(f) Tabulation of dataPenjadualan data

[17 marks]

END OF QUESTION PAPERKERTAS SOALAN TAMAT



SULIT http://smkbbf6chem.smfforfree.com/ 4541

1

4541 [Lihat sebelahSULIT

4541KimiaSkema PemarkahanSeptember2009


CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009

SIJIL PELAJARAN MALAYSIA

KIMIA

SKEMA PEMARKAHAN




2


PEPERIKSAAN PERCUBAAN SPM 2009CHEMISTRY MARKING SHEME

4541

ANSWER OF PAPER 1

No. Answer No. Answer

1 B 26 A

2 B 27 B

3 D 28 C

4 C 29 C

5 C 30 A

6 D 31 A

7 D 32 C

8 C 33 A

9 A 34 B

10 A 35 B

11 B 36 B

12 D 37 B

13 B 38 C

14 B 39 D

15 C 40 A

16 D 41 D

17 A 42 D

18 D 43 C

19 B 44 C

20 C 45 A

21 D 46 B

22 A 47 B

23 A 48 B

24 D 49 A

25 B 50 A




3


MARKING SCHEME OF PAPER 2

MARKQUESTION NO Marking Criteria

SUB TOTAL

(a) (i) Alkali 1(ii) OH- 1(iii) 7 < pH <12 1

(iv) The concentration of hydroxide ions in Solution A is higher.The higher the concentration of OH- ions the higher the pHvalue.

11

(b) HCl + NaOH NaCl + H2OCorrect reactantCorrect product

1+1

1

(c) MaVa = 1 (mole ratio 1:1) MbVb = 1

Va = 0.3 x 50 0.1

= 150 cm3

1

1

1

10

(a) Group 16, Period 3 1+1(b) 2D + 2H2O 2DOH + H2

Correct reactant & correct productBalance equation

1

1(c) (i) G 1

(ii) The nuclei attraction towards the valence electrons is weaker inG. Thus it is easier for G to lose / release an electron to form apositively charged ion.

11

(d) (i) F 1(ii) Has stable/octet electron arrangement // have 8

electron valence1

2

(e) (ii) Show coloured ion//formed complex ion//has various oxidationnumber//act as catalyst

1

10

(a) 1

(b) Labeling zinc plate ( - ) and copper plate ( + ) 1

3

(c) From zinc plate to copper plate through the external circuit 1

10Draw the connecting wire and voltmeter




4


(d) To allow the flow of ion from both electrolyte through it tocomplete the circuit

1

(e) The zinc plate becomes thinner 1(f) Cu2+ + 2e Cu 1(g) (i) The voltage will be higher 1

(ii) The silver metal is under the copper metal in the electrochemicalseries.

1

(h)

A B C

1

1

(a) (i) The chemical formula that shows the simplest ratio of atoms of theelements present in a compound.

1

(b) (i) ElementUnsur

Mg O

Mass (g) 25.12 – 24.88//0.24

25.28 – 25.12//0.12

Number ofmoles

0.24/24 // 0.01 0.16/16 // 0.01

Simplest ratio ofmoles 1 1

Empiricalformula MgO

1+1

1+1

1

1

(ii) 2Mg + O2 → 2MgO 1(c) To ensure that all the magnesium reacts completely with

oxygen.1

4

(d) Copper is an unreactive element towards oxygen 1

10

(a) Acidified Potassium manganate(VII) 1(b) +7 1(c) reduction 1(d) (i) Colourless solution turn brown 1

(ii) 2I- → I2 + 2e 1(iii) Iodide ion release electron 1

(e) To allow the flow of ion from both electrolytes 1

5

(f) Functional diagram of simple cellLabel

11

9

0.1

0.8

For pair of metal A / B ,the voltage produced= 0.8 – 0.1 = 0.7 V




5


(a) (i) Butanol 1(ii) The heat given off when 1 mol of butanol burn completely in

excess oxygen is 2679 kJ.1

(b) (i) (1) Number of mole = 0.37 mol //0.005 mol74

(2) Heat released = 0.005 x 2679/ 13.395 kJ/13.395 x 103 J

1

1(ii) (1) Substitution/Replacement

13.395 x 103 = 500 x 4.2 x / = 13.395 x 103

500 x 4.2(2) = 6.379/6.40C

1

1

(c) Draw and label of the energy axis in the form of arrow withtwo level of energyFormula/Name the reactants and products for exothermicreaction

Energy C4H9OH + 6O2

∆H = -2679 kJmol-1

4CO2 + 5H2O

1+1

(d) (i) Any value between: -2016 kJ mol-1 ≤ ∆H ≤ - 2036 kJ mol-1 1

6

(ii) As the number of carbon atoms increases, there are morecarbon dioxide and water molecules are produceThus more bonds are formed

1+1

11




7


or

(c) (i) Atoms W and Y form covalent bond.To achieve the stable electron arrangement,atom W contributes 4 electrons while atom Y contributes one electronfor sharing.Thus, atom W shares 4 pairs of electrons with 4 atoms of Y,forming a molecule with the formula WY4 // diagram

11111

(ii) Atom X and atom Y form ionic bond.Atom X has the electron arrangement 2.8.1. and atom Y has theelectron arrangement 2.8.7.

1

1

Y

Y

Y

WY

e-

e- e-

e-

e-

e-

e-e-

e-

e-

e-

11p + 12n




8


To achieve a stable (octet )electron arrangement,atom X donates 1 electron to form a positive ion // equation X X+ + e

Atom Y receives an electron to form ion Y-//equation and achieve astable octet electron arrangement. Y + e Y-

Ion X+ and ion Y- are pulled together by the strong electrostatic forcesto form a compound with the formula XY// diagram

1

11

1

Max10

(d) The melting point of the ionic compound/ (b)(ii) is higher than that of thecovalent compound/ (b)(i) .This is because in ionic compounds ions are held by strong electrostaticforces.High energy is needed to overcome these forces.In covalent compounds, molecules are held by weak intermolecular forces.Only a little energy is required to overcome the attractive forces.

OR

The ionic compound/(b)(ii) conducts electricity in the molten or aqueous statewhereas the covalent compound/(b)(i) does not conduct electricity.This is because in the molten or aqueous state, ionic compounds consist offreely moving ionscarry electrical charges.Covalent compounds are made up of molecules only

1

1

111

or

11

111

max4

Total 20

X Y

+--




10


Section C

9 (a) Food additives How food additives reacts Flavouring makes food tastier Colouring colours food so that it looks more Attractive Preservative Prevent the growth of microorganism on food

Antioxidant slow down the oxidation of food

* any three from above

1 + 11 + 1

1 + 11 + 1

(b)(i)

Sample answer;Apparatus:

- 1 kg weight- ruler- retort stand and clamp- thread- steel ball

Materials:- copper block- bronze block

Able to state the steps: 1. a steel ball is stuck onto the copper block 2. a weight of ( ½ -2 ) kg is hung at a height of (0.5-1)m from the top of Copper block. 3. the weight / thread is released / dropped 4. the diameter of dent is recorded 5. step 1 to 4 are repeated several times to obtain an average of the diameter . 6. the experiment is repeated using a bronze block.

Able to construct the table:

Experiment 1 2 3 Averagediameter/mm

Diameter of dent on the copper block / mm A1 A2 A3 ADiameter of dent on the bronze block / mm B1 B2 B3 B

Able to state the conclusion :B is smaller than A.Brass is harder than copper / alloys are harder than pure metals

1

1

1

111

1

1

11




11


(c)

-Correct draw the arrangement of atom in copper-Correct draw the arrangement of atom in bronze-correct labeled of atom

The stanum atom distrupt the orderly arrangement of atoms in copperThis prevents the layers of pure metal (copper) atoms from sliding on one another easily.

111

11

10 (a) Able to state(i) Sulphuric acid Mg + H2SO4 MgSO4 + H2

(ii) Able to draw an energy profile diagram that shows the following five information:

1. label of energy on vertical axis 2. The position of the energy level of the reactant is higher than the

energy level of the product 3. Correct position of Ea 4. Correct position of E’a 5. Correct position of ∆HIf energy level diagram given, not energy profile diagram, award pt1 and pt2only)

11

11

111

Able to give explanation by stating the following information:

1. Reaction is exothermic2. The reactants contain moare energy than the products3. Heat given nout during bond formation is greater than heat

absorbed during bond breaking4. ∆H is the energy difference between the reactants and products5. Activation energy, Ea must be overcome in order for the reaction

to take place6. The use of catalyst reduces the activation energy 5

Tin/stanum

Copper

CopperCopper

bronze




12


(must correspond to the energy profile diagram: negativecatalyst increases the activation energy)

7. the use of catalyst increases the frequency of effective collisionbetween H+ ion and magnesium atom

(Neagative catalyst reduces the frequency of effective collision between H+

and magnesium atom)any five points:

Note: If endothermic reaction: Pts 1,2,3 lost(b) (i) Able to calculate the average rate of reaction

1. volume divided by time 2. Correct answer with the unit

Avarage rate of rfeactiuon = 400 cm3

200 s

= 2 cm3 s-1

1+1

(ii) Able to explain the difference in the rate of reaction by stating thefollowing

Information

1. The rate of reaction for Experiment II is higher/greater thanExperiment I

r: slower/faster2. This is because sulphuric acid in Experiment II is

diprotic/dibasic acid3. Hydrochloric acid in Experiment I is monoprotic/monobasic

acid(Basicity of acid in Experiment II is higher than acid inExperiment I gives pts 2 and 3)

4. Diprotic acid has higher concentration of H+ ion //monoproticacid has lower concentration of H+ ion

a: more/higher number/less H+

5. The frequency of collision between H+ ion and magnesium inExperiment II is higher than in Experiment I// The frequency ofcollision between H+ ion and magnesium in Experiment I islower than in Experiment II

r: between particles

6. The frequency of effective collision in Experiment II ishigher/greater than in Experiment I// The frequency of effectivecollision in Experiment I is lower/smaller than in Experiment II

1

1

1

1

1

1

6




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MARKING SCHEME OF PAPER 3

Question Explanation Maximumscore

[Able to state all the observations correctly]

Sample answer :

Set Observation

II Potassium burns vigorously and produces white fume.

III Sodium burns rapidly and produces white fume.

3

[Able to state any one observations correctly] 2

[Able to state any one observations incompletely]

Sample answer:

Set Observation

II Potassium burns vigorously // produces white fume.

III Sodium burns rapidly // produces white fume.

1

1(a)

[No response given or wrong response] 0


[Able to state three variables and the way to control them correctly]

Sample answer:

Manipulated variable:

Type of alkali metals

Use different type of alkali metals

Responding variable:

Reactivity of alkali metals

Observe the burning/reactivity ofalkali metals when react withoxygen gas.

Fixed variable:

Oxygen gas // size of alkali metals

Use oxygen gas in eachexperiment // Use the same size ofmetals.

6

[Able to state any 5 of the above information correctly] 5[Able to state any 4 of the above information correctly ] 4[Able to state any 3 of the above information correctly] 3[Able to state any 2 of the above information correctly ] 2

1 (b)

[Able to state any 1 of the above information correctly ] 1




14




[Able to state the relationship between the manipulated variable and theresponding variable with direction correctly]

Sample answer:

The lower the position of an alkali metal in the Periodic Table, the morereactive it is when reacts with oxygen.

3

[Able to state the relationship between the manipulated variable and theresponding variable]

Sample answer:

The lower position of an alkali metal in the Periodic Table, the morereactive is the metal.

2

[Able to state an idea of hypothesis]

Sample answer:

Alkali metal have different reactivity.1

1 (c)



[Able to state the inference completely ]

Sample answer:

1. Lithium is the least reactive metal towards oxygen.

2. Lithium oxide is formed.

3

[Able to state the inference but not completely]

Any one inference2

[Able to state an idea of inference]

Sample answer: Reaction occurs 1

1 (d)





15



[Able to arrange the position of all metals in descending order ofreactivity correctly]

Sample answer:

Potassium/K, Sodium/Na, Lithium/Li

3

[Able to arrange the position of at least two metals in descending order ofreactivity correctly]

Sample answer:Potassium/K, Sodium/Na // Sodium/Na, Lithium/Li

2

[Able to give an idea to arrange the metals]

Sample answer:Lithium/Li, Sodium/Na, Potassium/K

1

1 (e)



[Able to predict the observation for the reaction between rubidium andoxygen correctly ]

Sample answer:

Rubidium burns more vigorously and produces white fume.

3

[Able to predict the observation for the reaction between rubidium andoxygen ]

Sample answer:

Rubidium burns more vigorously.

2

[Able to state an idea to predict the observation for the reaction betweenrubidium and oxygen correctly ]

Sample answer:

The reaction is more reactive.

1

1(f)





16



[Able to record all the pH meter reading with one decimal placeaccurately]:

Sample answer:

Set I : 13.2

Set II : 13.6

Set III : 13.3

3

[Able to record any two readings accurately]Or[Able to record all the pH meter reading without one decimal placecorrectly]

2

[Able to record any one readings correctly] 1

1 (g)(i)



Able to construct a table to record the pH value for Set I, Set II andSet III of experiment that contain :

1. Correct titles2. pH values

Sample answer:

Set pH Value

I 13.2

II 13.6

III 13.3

3

Able to construct a table that contains the following:

1. Titles

2. reading // ecf

2

Able to construct a table with at least one title/reading. 1

1(g)(ii)





17



[Able to state the operational definition for alkali correctly]

Sample answer:

pH value that is more than 7 when pH meter is dipped into a solution.3

[Able to state the operational definition for alkali ]

Sample answer:

pH value that is more than 7.2

[Able to state an idea of operational definition for alkali ]

Sample answer:

pH value that is 13.1

1(g)(iii)



[Able to classify all the substances correctly]

Sample answer:

Strong alkali Weak alkaliSodium hydroxide solutionPotassium hydroxide solution

Ammonia solution 3

[Able to classify any two substances correctly]2

[Able to classify any one substance correctly] 1

1(g)(iv)





18


KK051201-[To state problem statement]Score Explanation/Rubric Maximum

score2(a) Able to give the statement of problem by relating the following 4

information correctly:1. different metals2. contact3. electrolyte4. rusting

Response is in question form:

Sample answer:How do/(Do) different type of metals / (metals X and Y) in contact withiron in the presence of an electrolyte affect rusting of iron ? // What isthe effect on the rusting of iron, when it is in contact with other metals(metals X and Y) in the presence of an electrolyte?

3

Able to give the statement of problem.Response is in question form:

Sample answer:How do different type of metals / (metals X and Y) affect rusting?

2

Able to give an idea of statement of the problem.

Sample answer:To investigate the effect of different type of metals on rusting//Doeselectrolyte /X/Y/metal affect iron rusting?

1

No response or wrong response. 0

[KK051202-To state all variables]Score Explanation/Rubric Maximum

score2(b) Able to state all variables correctly:

Sample answer:Manipulated variable: metal X and metal Y // stating 2 metals which onemetal is less electropositive and one metal is more electropositive thaniron.// pairs of X-Fe and Y-Fe

Responding variable: the rusting of iron // iron rusts or does not rust //[any suitable observations: e.g. the formation of blue spot// the formation

3




19


of pink colour // the formation of brown solid]

Fixed variable: iron nail// electrolyte/(named) // agar/jelly solution//temperature

Able to state any two variables correctly. 2

Able to state any one variable correctly. 1


[KK051202-To state a hypothesis]Score Explanation/Rubric Maximum

score2(c) Able to state the relationship between the manipulated variable and the

responding variable with direction correctly:

Sample answer:Metal Y causes iron nail rusting while metal X does not.// A moreelectropositive metal/(metal X) will prevent iron from rusting while aless electropositive metal (metal Y) will be rusting iron.

3

Able to state the relationship between the manipulated variable and theresponding variable:

Sample answer:Metal Y speeds up iron nail rusting while metal X slows down rusting.

2

Able to state an idea of hypothesis:

Sample answer:Metal X / Y affect the rusting of iron.

1


[KK051203-list of materials and apparatus]Score Explanation/Rubric Maximum

score2(d) Able to give a complete list of materials and apparatus that involves the

following:3




20


1. iron nails2. 1 metal above iron in electrochemical series3. 1 metal below iron in electrochemical series4. A suitable electrolyte, test-tubes, sand paper

Sample answer:Iron nails, magnesium/zinc/aluminium strip, tin/copper/lead/silver strip,[agar-agar solution + potassium hexacyanoferrate(III)solution+phenolphthalein indicator]/[any suitable electrolyte]/[water],test-tubes/boiling-tubes, sand paperAble to give a list of materials and apparatus that involves the following:

1. 1 metal above iron in electrochemical series2. 1 metal below iron in electrochemical series3. Any suitable electrolyte, any suitable container

2

Able to give a list of materials and apparatus that involves the following:

1. 1 metal above/below iron in electrochemical series// any suitableelectrolyte.

2. any container

1


[KK051203-procedure of the experiment]Score Explanation/Rubric Maximum

score2(e) Able to state the following 6 steps:

1. [Clean the iron nails and metals strip with sand paper]2. [Coil iron nails with the metals]3. [Place iron nails in separate container]4. [Pour/add/fill the [named electrolyte] into the container]5. [Leave them aside for several days]6. [Record your observation]

Sample answer:1. Clean iron nails, magnesium ribbon and copper strip with sand

paper.2. Coil two iron nails tightly with magnesium ribbon and copper

strip.3. Place all the iron nails in separate test tubes.4. Pour the hot agar containing potassium hexacyanoferrate(III)

solution and phenolphthalein indicator into the test tubes.5. Keep the test tubes in a test tube rack and leave them aside for 3

days.

3




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END OF MARKING SCEME



spm chemistry trial 2009 kelantan

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