Spm Chemistry Trial 2009 Kelantan

SULIT 4541/1 Kimia Kertas 1 September 2009 1 ¼ jam

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: ............................................................................

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA SEKOLAH MENENGAH MALAYSIA CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009 SIJIL 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.

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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 on the objective answer sheet. Bagi Soalan 1 hingga Soalan 50, tiap-tiap soalan diikuti oleh empat pilihan jawapan A, B, C dan D. Pilih satu jawapan yang terbaik bagi tiap-tiap soalan dan hitamkan ruangan yang sepadan pada kertas jawapan objektif anda -24541/1

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

19 9

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X

Diagram 1 Rajah 1 Which of the following represents 19? Antara berikut, apakah yang diwakili oleh angka 19? A Proton number nombor proton B Nucleon number nombor nukleon C Number of neutrons bilangan neutron D 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 SO42- . Pilih formula kimia yang betul bagi aluminium sulfat. A B C D

3

Al(SO4)3 Al2(SO4)3 Al3(SO4)2 AlSO4

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

It can form a basic oxide. Ianya boleh membentuk oksida bes. It can conduct electricity. Ianya boleh mengalirkan arus elektrik It has a high melting point. Ianya mempunyai takat lebur yang tinggi 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 2 Rajah 2 What is the value of y? Apakah nilai y A B C D 5

1 3 5 7

Neon gas does not react with other elements because Gas neon tidak bertindak balas dengan unsur lain kerana A exists as monoatomic gases wujud sebagai gas monoatom B always combines with itself sentiasa bergabung dengan diri sendiri C has stable octet electron arrangement mempunyai susunan elektron octet yang stabil D has stable duplet electron arrangement mempunyai susunan elektron duplet yang stabil

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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. http://spmchem.blogspot.com/

Substance Does the solid substance conduct electricity? Does the molten substance conduct electricity?

P

Q

R



X

X



X



Table 1 Jadual 1 Which of the following statements is true ? Di antara pernyataan berikut, yang manakah benar ? 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. 7

Which solution shows the highest pH value? Larutan manakah menunjukkan nilai pH tertinggi? A 0.5 mol dm-3 sulphuric acid 0.5 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 ammonia 0.5 mol dm-3 ammonia akueous D 0.5 mol dm-3 sodium hydroxide solution 0.5 mol dm-3 larutan natrium hidroksida

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8

Substance X + Sulphuric acid Bahan X asid sulfuric

→

Salt Y + Water + Carbon dioxide 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) oxide Kuprum(II) oksida B Magnesium metal Logam magnesium C Zinc carbonate Zink karbonat D Sodium hydroxide Natrium hidroksida 9

Which of the following is a coloured salt? Antara berikut yang manakah suatu garam berwarana? A Iron(II) sulphate Ferum(II) sulfat B Silver nitrate Argentum nitrat C Lead(II) nitrate Plumbum(II) nitrat D Calcium carbonate Kalsium 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. Catalyst M N2 + 3 H2

2NH3

o

450 C/ 60 atm Diagram 3 Rajah 3 What is catalyst M? Apakah mangkin M? Iron A Ferum Nickel B Nikel Copper(II) oxide C Kuprum(II) oksida Manganese(IV) oxide D Mangan(IV) 0ksida -64541/1

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

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A Good heat conductors Pengalir haba yang baik B Withstand heat better Sangat tahan haba C Good electrical conductors Pengalir elkektrik yang baik D Does not withstand compression Kurang tahan mampatan 12 The following statements are related to the collision theory of a reaction . Pernyataan-pernyataan berikut adalah berkaitan dengan teori perlanggaran suatu tindak balas. Which of the following combination is true about the effect of the concentration on the reactant particles? Antara kombinasi berikut yang manakah benar tentang kesan kepekatan ke atas zarah-zarah bahan tindak balas I II III IV A B C D

The total surface area of the reactant particles increases Jumlah luas permukaan zarah-zarah bahan tindak balas bertambah The kinetic energy of the reactant particles increases Tenaga kinetik zarah-zarah bahan tindak balas bertambah The number of the reactant particles per one unit of volume increases Bilangan zarah-zarah bahan tindak balas per satu unit isipadu bertambah The frequency of the collision between the reactant particles increases Frekuensi perlanggaran antara zarah-zarah bahan tindak balas bertambah I and II only I dan II saha II and III only II dan III sahaja I and IV only I dan IV sahaja 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 B

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A catalyst is specific in its reaction Mangkin adalah khusus dalam tindak balasnya A catalyst inflauences the quantity of product of reaction Mangkin mempengaruhi kuantiti hasil tindak balas

C

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

D

Only a little amount of a catalyst is needed to influence the rate of reaction Hanya 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 water Larut dalam air

B

Low boiling point Takat didih rendah More dense than water Lebih tumpat daripada air Can conduct electricity Boleh mengkoduksikan arus elektrik

C D

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 B C D

Oxidation Pengoksidaan Dehydration Pendehidratan Fermentation Penapaian Hydrogenation Penghidrogenan -8-

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16 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–C–C–H

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H

H–C–C–C–H

H OH

H H OH

P Q 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 groups Kedua – duanya mempunyai kumpulan berfungsi yang berlainan B All their physical properties are similar Semua sifat fiziknya sama C All their chemical properties are different Semua sifat kimianya berbeza D They can be represented by the same general formula Kedua – 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 B C D

Electrons are received by chlorine Elektron diterima oleh klorin Electrons are donated by chlorine Elektron diderma oleh klorin Electrons are received by chloride ions Elektron diterima oleh ion klorida Electrons are donated by chloride ions Elektron diderma oleh ion klorida

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18 Which substance is an oxidising agent? Bahan manakah yang merupakan agen pengoksidaan? A B C D

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Zinc Zink Sulphur dioxide gas Gas sulfur dioksida Potassium bromide solution Larutan kalium bromida Acidified potassium dichromate(VI) solution Larutan 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 + water Asid etanoik + etanol  etil etanoat + air B Oil + sodium hydroxide  glycerol + sodium palmitate Minyak + natrium hidroksida  gliserol + natrium palmitat C Glucose + yeast  ethanol + carbon dioxide Glukosa + yis  etanol + karbon dioksida D Alkylbenzene sulphonic acid + sodium hydroxide  sodium alkylbenzene sulphonate + water Asid 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 merendahkan ketegangan 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.

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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 2 B 3 C 5 D 7 22

An advertising light is filled with 1800 cm3 of neon gas at room condition. Calculate the number of neon atom in the light? [1 mol gas occupies the volume of 24 dm3 at room temperature and pressure, Avogadro Numbers = 6.02 x 1023] Sebiji lampu iklan telah diisi dengan 1800 cm3 gas neon pada keadaan bilik. Hitung bilangan atom bagi gas neon dalam lampu itu? [1 mol gas menepati isipadu sebanyak 24 dm3 pada suhu dan tekanan bilik, nombor avogardo = 6.02 x 1023] A B C D

4.515 x 1022 4.515 x 1023 8.03 x 1022 8.03 x 1021

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23 Diagram 5 shows a part of set up apparatus to determine the empirical formula of metal oxide. http://spmchem.blogspot.com/ Rajah 5 menunjukkan sebahagian dari radas untuk mengenalpasti formula empiriks bagi oksida logam. H2

Diagram 5 Rajah 5 Which of the metal oxide cannot be used by this method? Oksida logam yang manakah tidak boleh ditentukan menggunakan kaedah ini.? A Zinc oxide Zink oksida B Lead(II) oxide Plumbum(II) oksida C Copper(II) oxide Kuprum(II) oksida D Iron(III) oxide Ferum(II) oksida

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Diagram 6 shows the electron arrangement of a compound formed between atoms X and atom http://spmchem.blogspot.com/ Y. Rajah 6 menunjukkan susunan elektron bagi sebatian yang terbentuk di antara atom X dan atom Y

Diagram 6 Rajah 6 Which of the following statements is true about this compound? Yang manakah di antara pernyataan berikut benar tentang sebatian ini A B C D

It is an ionic compound. Ia merupakan sebatian ion The compound conducs electricity. Sebatian ini boleh mengkonduksikan arus elektrik The compound has high melting point. Sebatian ini mempunyai takat lebur yang tinggi The compound is formed by the sharing of electrons. Sebatian terbentuk melalui perkongsian elektron

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Diagram 7 shows the set up of the apparatus for the electrolysis of molten lead(II) oxide. http://spmchem.blogspot.com/ Rajah 7 menunjukkan susunan radas bagi elektrolisis leburan plumbum(II) oksida.

Diagram 7 Rajah 7 What are the products formed at the anode and the cathode? Apakah hasil yang terbentuk pada anod dan katod?

A B C D

Anode Anod Lead Plumbum Oxygen Oksigen Hydrogen Hidrogen Oxygen Oksigen

Cathode Katod Oxygen Oksigen Lead Plumbum Oxygen Oksigen Hydrogen Hidrogen

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

Cathode

A Copper plate becomes thinner Plat kuprum menjadi nipis B Copper plate becomes thinner Plat kuprum menjadi nipis C Copper plate becomes thicker Plat kuprum menjadi tebal D Gas bubbles are released Gelembung-gelembung gas terbebas

Copper plate becomes thicker Plat kuprum menjadi tebal Gas bubbles are released Gelembung-gelembung gas terbebas Copper plate becomes thinner Plat kuprum menjadi nipis Copper plate becomes thicker Plat kuprum menjadi tebal

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27. Table 2 shows the observation of electrolysis of a substance using carbon electrode . http://spmchem.blogspot.com/ Jadual 2 menunjukkan pemerhatian bagi elektrolisis suatu bahan menggunakan elektrod karbon. Electrode Elektrod Anode Anod Cathode Katod

Observation Pemerhatian A greenish-yellow gas released Gas berwarna kuning kehijauan terbebas A colorless gas which burns with a ‘pop’ sound is released Gas yang tidak berwarna dan terbakar dengan bunyi pop terbebas Table 2 Jadual 2

The electrolyte maybe Elektrolit itu mungkin Dilute hydrochloric acid A Asid hidroklorik cair Concentrated potassium chloride solution. B Larutan kalium klorida pekat Copper (II) chloride solution. C Larutan kuprum (II) klorida Concentrated magnesium bromide solution D Larutan magnesium bromide pekat. 28 Which of the following statement correctly describes a strong alkali? Antara pernyataan berikut, yang manakah betul tentang alkali kuat ? Has a low pH value I Nilai pH yang rendah Ionises completely in water II Mengion dengan lengkap dalam air Has a high concentration of hydroxide ions III Mempunyai kepekatan ion hidroksida yang tinggi Exist as molecules in water IV Wujud sebagai molekul dalam air A B C D

I and II I dan II I and IV I dan 1V II and III II dan III III and IV III dan IV - 15 -

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29 Diagram 8 shows a method of preparing insoluble salt by mixing solution X and solution Y.

http://spmchem.blogspot.com/ Rajah 8 menunjukkan suatu kaedah penyedian garam tak terlarutkan melalui campuran larutan X dan larutan Y.

Solution Y Larutan Y Solution X Larutan X Salt Garam

Salt crystals Mixing two solution Campuran dua larutan

Filter and rinse Turas dan bilas

Dry Keringkan

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

A

Neutralisation reaction Tindak balas peneutralan

B

Substitutiuon reaction Tindak balas penukar gantian

C

Precipitation reaction Tindak balas pemendakan

D

Addition reaction Tindak balas penambahan

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30 Diagram 9 shows the stages I, II, III and IV in the Contact Process during the preparation http://spmchem.blogspot.com/ of sulphuric acid. Rajah 9 menunjukkan peringkat I, II, III dan IV bagi penyediaan asid sulfurik melalui Proses Sentuh. S

I

SO2

II

SO3

III

H2S 2O7

IV

H2SO4

Diagram 9 Rajah 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 IV A O2 H2O B 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 10 Rajah 10 The compound is produced by the reaction between Sebatian ini terhasil daripada tindak balas antara A B C D

ethanol and propanoic acid etanol dengan asid propanoik ethanol and butanoic acid etanol dengan asid butanoik propanol and ethanoic acid propanol dengan asid etanoik butanol and ethanoic acid butanol dengan asid etanoik - 17 -

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32. The equation below represents the reaction between calcium carbonate and hydrochloric http://spmchem.blogspot.com/ acid. Persamaan di bawah mewakili tindak balas antara kalsium karbonat dengan asid hidroklorik. CaCO3(s) + 2HCl (aq) CaCl2(aq) + H2O(l) + CO2(g) Which of the following graphs shows the changes of volume of carbon dioxide against the time of reaction? Antara graf berikut, yang manakah betul bagi menunjukkan perubahan isipadu gas karbon dioksida terhadap masa tindak balas? A

B

Volume CO2/cm3 Isipadu CO2/cm3

Time/min Masa/min

Volume CO2/cm3 Isipadu CO2/cm3

Time/min Masa/min

C

Volume CO2/cm3 Isipadu CO2/cm3

Time/min Masa/min D

Volume CO2/cm3 Isipadu CO2/cm3

Time/min Masa/min

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33 The following equations represent the displacement reactions between metals P, Q and R. http://spmchem.blogspot.com/ Persamaan berikut mewakili tindak balas penyesaran antara logam P, Q and R. Reaction 1 Tindak balas 1

:

P

+

Q2+

P2+

+

Q

Reaction 2 Tindak balas 2

:

R

+

P2+

R2+

+

P

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 Q P lebih elektropositif daripada Q B P and R are oxidising agents P dan R merupakan agen pengoksidaan C The descending sequence of metals’ reactivity is R, Q, P Susunan menurun kereaktifan logam ialah R, Q, P D P2+ and Q2+ are reducing agents while R2+ is oxidising agent P2+ 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 electrons http://spmchem.blogspot.com/ at a distance. Rajah 11 menunjukkan susunan radas yang digunakan untuk mengkaji pemindahan elektron pada satu jarak.

Carbon rod Y Rod karbon Y

Carbon rod X Rod karbon X

Acidified potassium dichromate(VI) solution Larutan kalium dikromat(VI) berasid

Iron (II) sulphate solution Larutan ferum(II) sulfat

Dilute sulphuric acid Asid sulfurik cair

Diagram 11 Rajah 11 What colours can be observed at the ends of carbon rod X and carbon rod Y at the end of the experiment? Apakah warna yang dapat diperhatikan di hujung rod karbon X dan rod karbon Y pada akhir eksperimen itu.

A B C D

Rod X Yellow Kuning Yellow Kuning Green Hijau Green Hijau

Rod Y Colourless Tidak berwarna Green Hijau Orange Perang Purple Ungu

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351. The following equation shows the reaction between Ag+ and Cl- ions. http://spmchem.blogspot.com/ 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 B C D

Endothermic reaction occurs Tindakbalaas endotermik berlaku Heat is released to the surroundings Haba dibebaskan ke persekitaran The temperature of the product decreases Suhu hasil tindakbalas berkurang . 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 C

39 40

D

88

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The following equation shows the decomposition reaction of lead(II) nitrate when heated at http://spmchem.blogspot.com/ room temperature and pressure. Persamaan berikut menunjukkan tindak balas penguraian plumbum(II) nitrat apabila dipanaskan pada suhu dan tekanan bilik. 2 Pb(NO3)2

2PbO + 4 NO2 + O2

Which of the following is true when 0.1 mol of lead(II) nitrate is decomposed? [Relative atomic mass: N=14, O=16,Pb=207 and 1 mol gas occupies the volume of 24 dm3 at room temperature and pressure] Antara yang berikut, yang manakah benar apabila 1 mol plumbum(II) nitrat terurai? [Jisim atom relatif: N=14, O=16,Pb=207 dan 1 mol gas menepati isipadu sebanyak 24 dm3 pada suhu dan tekanan bilik.] A B C D

44.6 g of lead(II) oxide is formed. 44.6 g plumbum(II) oksida terbentuk. 4800 cm3 of nitrogen dioxide is given off. 4800 cm3 gas nitrogen dioksida terbebas 2.4 dm3 of oxygen gases is given off. 2.4 dm3 gas oksigen terbebas. 4.46 g of lead(II) oxide is formed. 4.46 g plumbum(II) oksida terbentuk.

38 0.65 g of zinc powder reacts with excess hydrochloric acid to produce hydrogen gas. 0.65 g 0.65 g serbuk zink bertindak balas dengan asid hidroklorik berlebihan untuk menghasilkan gas hidrogen. Which Which of the following is true about the reaction? Pernyataan manakah benar tentang tindak balas? [RAM: H=1,Zn=65, Cl=35.5 and 1 mol of gas occupies 24 dm3 at room temperature and pressure] I II III IV

Zn + 2H+ Zn 2+ Volume of gas released is 120 cm3 Mass of the salt formed is 1.36 g This is redox reaction

A B C D

I and II only I and III only I,III and IV only II, III and IV only

+

H2

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SULIT 39

What can be deduced from the symbol

27 13

Al?

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Apakah yang dapat disimpulkan dari symbol 27 13 Al? I The electron arrangement of aluminium atom is 2.8.3 Susunan 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 B C D 40

I and III II and IV II and III I and IV

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?

A B C D

Group Kumpulan 17 18 2 2

Period Kala 2 2 18 17

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

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Diagram 13 Rajah 13 Which of the following statements are true? Kenyataan berikut yang manakah benar?

IV

Sodium atom has an unstable electron arrangement. Atom natrium mempunyai susunan elektron yang tidak stabil Sodium ion has an octet electron arrangement as in neon atom. Ion natrium mempunyai susunan elektron oktet seperti gas neon. Sodium atom donates an electron to form a positive charge ion. Atom natrium menderma satu elektron untuk membentuk ion bercas positif Sodium atom reacts with non-metals atoms to form ionic compounds. Atom natrium bertindak balas dengan atom bukan logam membentuk sebatian ion.

A B C D

I and III only II and III only I, III and IV only I, II, III and IV

I II III

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42 Table 3 shows the result of an experiment for three simple voltaic cells. http://spmchem.blogspot.com/ Jadual 3 menunjukkan keputusan suatu eksperimen bagi tiga sel ringkas. Positive terminal W Y X

Negative terminal X X Z

Voltage (V) 0.3 0.8 1.9

Table 3 Jadual 3 The arrangement of the metals in the electrochemical series in descending order of electropositivity is Susunan logam-logam mengikut keelektropositifan dalam siri elektrokimia mengikut urutan menurun adalah A B C D

W, Z, X, Y Y, W, X, Z Y, W, Z, X Z, X, W, Y

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

Electrodes used Iron and Zinc Zinc and magnesium Copper and magnesium

Voltage (V) 0.2 1.6 2.6

Table 4 Jadual 4 What is the potential difference of the voltaic cell which consists of copper and iron electrodes? Apakah nilai voltan bagi sel yang mengandungi elektrod kuprum dan ferum ? A B C D

0.4 0.6 0.8 2.4

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The equation shows the reaction between sulphuric acid and potassium hydroxide. http://spmchem.blogspot.com/ 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 neutralise 25.0 cm3 of 1.0 mol dm-3 sulphuric acid? Berapakah isipadu 1.0 mol dm-3 larutan kalium hidroksida yang boleh meneutralkan 25.0 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?

A B C D

Cation Kation Nessler reagent Reagen Nessler Nessler reagent Reagen Nessler Potassium thiocyanate Kalium tiosianat Potassium thiocyanate Kalium tiosianat

Anion Anion Dilute nitric acid and silver nitrate Asid nitrik cair dan argentums nitrat Dilute hydrochloric acid and barium chloride Asid hidrokloreik cair dan barium klorida Dilute nitric acid and silver nitrate Asid nitrik cair dan argentums nitrat Dilute hydrochloric acid and barium chloride Asid hidrokloreik cair dan barium klorida

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46 Table 5 shows the total volume of oxygen, collected in the decomposition of hydrogen http://spmchem.blogspot.com/ peroxide catalysed by manganese(IV) oxide. Jadual 5 menunjukkan jumlah isipadu oksigen yang dikumpul dalam penguraian hidrogen peroksida yang dimangkinkan oleh mangan(IV) oxida. Time (min) Masa Volume of gas Isipadu gas (cm3)

0

1

2

3

4

5

0

11.20

23.60

29.70

31.40

31.40

Table 5 Jadual 5 What is the average rate of reaction Berapakah kadar tindak balas purata? 3 -1 A 6.28 cm min B

7.85 cm3 min-1

C D

9.90 cm3 min-1 11.80 cm3 min-1

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Diagram 14 shows the set up of the apparatus for an experiment to determine the rate of http://spmchem.blogspot.com/ reaction between sodium thiosulphate and sulphuric acid. Rajah 14 menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindak balas antara natrium tiosulfat dengan asid sulfuric.

Sodium thiosulphate solution and sulphguric acid Natrium tiosulfat dan asid sulfurik Mark X Tanda X

White paper Kertas putih 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 singkat untuk tanda X hilang daripada penglihatan?

A B C D

Sulphuric acid Asid sulfurik Volume Concentration Isipadu Kepekatan (cm3) (mol dm-3) 5 1.0 5 1.0 5 0.5 10 0.5

Sodium Thiosulphate solution Larutan natrium tiosulfat Volume Concentration Isipadu Kepekatan (cm3) (mol dm-3) 50 0.4 50 0.4 50 0.4 45 0.4

Temperature Suhu (oC) 30 40 30 40

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48 Table 6 shows the heat of combustion of three alcohols . Jadual 6 menunjukkan haba pembakaran bagi tiga alkohol. Alcohol Alkohol CH3OH C2H5OH C4H9OH

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Heat of combustion / kJmol-1 Haba pembakaran /kJmol-1 -710 -1370 -2670

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

Size of molecules decreases Saiz molekul berkurang Number of carbon atoms per molecule increases Bilangan atom karbon per molekul bertambah Number of oxygen atoms per molecule increases Bilangan atom oksigen per molekul bertambah Number of hydrogen atoms per molecule decreases Bilangan atom hidrogen per molekul berkurang

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Diagram 15 shows energy level diagrams for the reaction between hydrochloric acid http://spmchem.blogspot.com/ and potassium hydroxide . Rajah 15 menunjukkan gambarajah aras tenaga untuk tindakbalas antara asid hidroklorik dan kalium hidroksida . Energy Tenaga H+ + OH-

- 54 kJ mol-1

H2 O

Diagram 15 Rajah 15 Calculate the amount of heat released when 50 cm3 of 2 mol dm-3 hydrochloric acid reacts 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 B C D

5.40 kJ 10.8 kJ 27.0 kJ 54.0 kJ

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The following equation shows the combustion of heptane, C7H16 in excess oxygen. http://spmchem.blogspot.com/ Persamaan berikut menunjukkan pembakaran heptana, C7H16 dalam oksigen berlebihan. 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 membebaskan 1378 kJ tenaga. Berapakah jisim heptana yang digunakan? [Relative atomic mass : H = 1; C = 12] [Jisim atom relatif: H = 1 ; C = 12 ] A B C D

25.0 g 36.0 g 77.0 g 88.0 g

END OF QUESTION PAPER KERTAS SOALAN TAMAT

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SULIT Kimia Kertas 2

Nama pelaiar :

September 2009 2% jzm

Tingkatan

JABATANPELAJARANKELANTAN DENGANKERJASAMA PERSIDANGANKEBANGSAANPENGETUA.PENGETUA SEKOLAHMENENGAII MALAYSIA CAWANGANKELANTAN

PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA 2OO9 KIMIA KERTAS2 Masa: f)ua JamTigaPuluhMinit JANGAN BUKA KERTAS SOALAN INI SETIINGGADIBERITAHU Arahan: 1. Kertassoalanini adalahdalam dwibahasa 2. Setiapsoalanmengandungi keduadua bahasaInggeris dan bahasa Melayu.Bahagianatasdalambahasa Inggerisdan diikuti di bawahnyaoleh bahasaMelayu 3. Calondibenarkanmenjawab keseluruhanatau sebahagiansoalan samadadalam bahasaMelayu atau bahasaInggeris 4. Calondikehendakimembaca maklumatdihalaman2.

Kod Pemeriksa Bahagian

Soalan I

2 J

A

A T

5 6 7

B

8 C

9

Markah Penuh

Markah Diperolehi

l0 10 10 l0 9 ll

20 20 20

_ r0 _]-_ 20 umlah

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INFORMATIONFOR CANDIDATES I . This questionpapcr consistsof thrcc scctions:Section A, Section B and Section C. 2.

Answcr all qucstionsin Section A. Write your answcrsfor sectionA in the spaccprovidcd in the qucstionpapcr.

3.

Answer one question liorn Section B and one questionfrom Section C.

4.

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

5.

The diagramsin the questionsare not drawn tcrscaleunlessstated.

6.

Mark allocatedfor each questionor part qucstionarc shown in brackcts.

7.

The tirne suggestedto answersSection A is 90 minute, Section B is 30 trinute and Scctiort C is 30 minutc

8.

scientillc calculator. You may use a non-prograrnrnable

MAKLUMAT KEPADA CALON l.

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

2.

Jawab se,nuasoalun dalam Bahagiun A. Tuliskttnjawopan unda unluk Bahugiun A dulutn ruang yang disediakan cJalamkertu.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 BahctgianA ialuh 90 minit, Ilohagian B -10ninit dan Bcthagian C iuJuir -i()ninit.

8.

Anda dibenarkan rnenggunakan kalkuletor saintfik yang liduk bolch diprogrontkun.

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SectionA [60 marks] 160markahl Answcrall qucstions ,lawubsenruu'sttulun usedto carry DiagramI showsthe informationabouttwo typesof solutionsA and B which are acid. out titrationwith hydrochloric jenis lartrlonA dan B yang digunakanunttrk maklunnl tentattgcluct I menttnjtrkkan Ra.iah menjalankcmpentitrQtdndengttnasid hidroklorik' Solution A Lartrtan A

: 5 0 c m ' ro f 1 . 0 m o l d m - ] s o d i u mh y d r o x i d e ,N a O H : 50 cmr natrhtm hidroksicla,NaOH I '0 mol dm-''

Solution B LttrrtlttnB

: 50 cm'r of L0 rnol dm-l atnmoniurnhydroxide' NHaOH : 50 cmr omntonit* hiclrok'siclu,NHlol1l'0 mol dm-'

DiagramI Rajah I (a)

(i) Whatarcthc typcsof solutionsA andB. lurulon A dan B. Apakuh.jeni,s I mark) ll rnarkahl ( ii) Statethe formulaof ion thatpresentin bothsolutions'/ N),atuk(tn./brmulaion vang hadir di dalam kedua-dualQrutan'/ ll mark) l1 markahl (iii) PredictthepH valueof SolutionB, if thepH valueof SolutionA is t 4 . Ranrulkannilui PH hugi Larulan B jika nilai pH I'arutan A aclnlah1 4 . fl markl l1 mevkahl

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(iu) Why thcreis differentin pH valueof SolutionA and B? Mengapakahterdapatperbezaannilai pH di antara Lanttan A dqn B?

12marksl [2 markah]

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

1z-iaiil 12markah) acid,HCI solutionneededto neutralise thevolumeof 0. I mol clm-lhydrochloric ( c ) Calculate SolutionA. Hitungkan isipaclularutan asid hidroklorik 0.1 mol dm-l yang cliperlukttnuntuk LarutanA. meneutralkan

13marksl [3 markah)

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

Diagram2 Rajah 2

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Usingthe lettersin the PeriodicTableof the Elementsin Diagram2, answerthe following questions. b"rgon menggunakanhuruJ--huyu.rangterdapatdqlam.IaduAlBerkalapada Rajah 2, j awabsoalan-slalanberikut. (a)

Statethe positionof elementC in the PeriodicTable. Nyatakankedudukanunsur C dalam JaduQlBerkala. [2 maik] 12markahl

(b)

ElcmcntD rcactwith waterto producealkalinesolutionand hydrogengas. (JnsurD bertindek balas denganeir untuk menghasilkanlarulan beralkctlidan gas hidrogen. Write thechemicalequationof thereaction. Tuliskanpersamaankimia bagi tindak balas ini. 12marksl [2 markah]

(c)

D and G havethe samechemicalproperties. D dan G mempunyaisifat-sifat kimia yang sama. (i)

Which elementis morereactive? (Jnsur yang manakahyang lebih reaktiJ? 11mark) I markahl

(ii)

Explainyour answcrin (c) (i). Terangkanjawupan anda dalam (c) (i).

[2 marks] 12markahl (d) (i)

Whichelementis chemicallyinert? (Jnsuryang manakah lengai secarakimia ? 11markl I markahl

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(6) (ii)

Explainyour answerin (d) (i) Terangkanf awdp(utandctclalqtn(d) (i).

1 1t r r u lt, ) ll trtttrkultj1 (e)

S t a t eo n e s p e c i a lc h a r a c t e r i s t iocl:- e l e r n e n tIsI Nyalakansulu ciri islimewttunsur ft.

ll ttt,tt'lil | [ tttorliulrl

-)1

D i a g r a r n3 s h o w sp a r t o f t h c s c t u p o f a l l p a r a l u so 1 a - c l r c r ri rc a l c e l l . Rc1jah3 nrcnunjrtklicrnsebcthttgittncluripudu susuttenrutlu.; bugi .sucttuscl kitttiu.

Zinc plate / Kcpingan.:lrii

Colrlrcrplatc / Kcpittgotr kultrttrrr Pttrtrttspot I l)tt.:'trht'r'litut,!

Z i n c s u l p h a t cs < l l u t i o n Luulurt zink sulJht

C o p ; l e r I(I ) s L r l p h l t es o lr r li o n Itrt't tIctttli uprr rnt ( I [ ) .srrIf u t Diagranr3 I?t.riuh3

( a ) D r a w a c o m p l e l cs c t - u po f a p p a r a t u sf b r t h e c h c n r i c a cl c l l o r r [ ) i a q r a r r3r . Ltrkiskun su.\un(u1roda,s1:ung lengkt4t ltttgi .stl kittriultuclu llolalr 3. | | t t t t r r lI t | | trrurl'trltl ( b ) L a b c l t h c n c g a t i v cc l c c t r o d ca s ( - ) a n d p o s i t i i , ' c l c c t r o c i ca s { ' l - ) o n t h c c o n r p l c t e ( l c h c n r i c a cl c l l . Lctbelkunclcktroclncga/if',scbugui( - 1dun clcktrodpositif saktgdi ( t ) ltitcltt t'ttj,rlt.scl kimia vang lelah lengkup.

(c) Statetlreflow of electronfor thc chernical cell in diagrarn3. l,'lr,atakanarah pengttliran elektronbugi sel kintitt ltutlu tlttjuh 3.

l1 nturlil l\ nrurfurltl

ll murkl

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(1 ) (d) Whatis thc functionof the porotlspot uscdin theabovechclnicalccll? Apukah/imgsipasu berliang)'}angdigunakandalamsel kimia di atas? STILIT

ll markl ntarkahl

u (e) What can you observedat the negativeelectrode'/ tlpuktth yttng boleh ctnclaperhttlikan paclu elektrod negutiJ'?

l1 nturkl ll marktth) (f)

w r i t e h a l f e q u a t i o nl b r t h e d i s c h a r g e do f i o n s a t p o s i t i v ee l e c t r o d e . Ttiiskan persamaon setengah bagi ion yang clidiscrtspodo eleklrrtd positi/.

l1 murkf ll markahf (g) (i)

what will I f t h c c o p p c rp l a t c i n t h c c h c n r i c a cl c l l a b o v ci s r c p l a c c db y s i l v c r m c t a l , c e l l ' h a p p e nt o t h c v o l t a g er e a d i n go f t h e Jika kepingan kupntm di dalam ,salkimict tli atas digontikan dengon logam Qrgenntm,apakoh vctngberlaktr lrcpada nil(li t,oltQnyang alcan terhctsil.

ll murkl l1 markahl for your answcr. (ii) Give thc reasot.ts Bt'rikun scluh fiagi .,urr',r1'ununJu

ll mork) ll nurkulr, 'fablc (h) 3 s h o w st h c v o l t a g co f c h c m i c a lc c l l nsingmctalsA, B andC asthc clcctrodc logamA,B dan C Jadrral 3 menuniukkan nilai voltan hugi sel kimia menggunqkan sebagoi elektrod. V o l t a g c( V )

Pairsof mctal

J:pgt:sgr, tggglJB/C A/C

aibr,"plelJll) 0.1

I'ositivc clcctrodc

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

0.8

C C

Table3 Jqdual3

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Basedon thc information givcn, calcuiatcthc voltagc of a chemical cell using metal A and B as the electrodes, Berdasarkan kepada maklumat yang diberikan, himngkan nilai voltan yang akan dihasilkan oleh sel kimia yang menggunakan logam A dan B ,rebagai elektrod.

[2 marks] [2 markah) Diagram 4. I shows the set up of apparatusfbr an experimentto determinethe empirical formula of magnesiumoxide. Raiah 4.1 menunjukkan susunan radas bagi suulu eksperimenuntuk menentukan.fbrmula empirik magnesium oksida.

Li,-1 tDentitti.y.,

(-lnrcrble

Ivlagnesnrm ribb.:n hla nragne.num

ilfrrxgxirip3r:crr

D i a g r a m4 . 1 Rajah 4.1 (a) What is the meaning of empirical formula? Apakah mak ud formu I a empi r ik?

I markl fl ntarkahl

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(9) SULIT of thccxperiment. (b) Diagram 4.2showstheresults Rajah 4.2 menuniukkan keputttsattexperiment itLt.

Massof crucible+ lid Jisint ntangkukpijar -r penutttP

: 24.8Ro

ribbon Massof crucibtc+ lid + magnesiurr Jisimmangktftpijar + pentttttp * pitamagncsium

: 25.12g

oxide Massof crucible+ lid + magnesium piiar + penutltp + magnesiumoksida Jlsim mcmgkuk

: 25.28g

Diagrarn4.2 Rajah 4.2

(i)

Basedon Diagrarn 4.2, completeTable 4 and deternrinethe empirical formula of magnesiumoxide. Berclasarkun Rujuh 4.2, lengkaltkctn Judual 4 dan selcnrsnyu lentukan formula empirik bagi magnesium olcsirla: : [ R e f a t i v ea t o r n i cm a s s :O 1 6 , M g : 2 4 ] fJisim utom relotif. O 16, Mg 2al Elcrncnt LJnsur

Mg

o

Mass(g) Ji,sint Nurnberof moles Bilanganmol Sir-nplcstlatio of moles Nisberhringkas bilangan mol

E,mpiricalformula Iiormulu empiric Table4 Jctduol4 16murk's) f6 markuh) (ii)

Writc thc chcmicalcquationfor thc rcactionin theexperiment. Tulislranpersamaankimia bagi titrdak balas dalam eksperimenitu.

11murkl markah) 11

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sulrT

454rt2

(c) Why the proccssof heating,coolingandwcighingarerepcated until a constantrnassis obtained? dun pcnitnbangundirtlang.schingga.iisim prosespct ldnasan,perr')ejuka,r Mengapakah d ipe ro I ehi'? telap .va,1g

ll murk) nrurkult) ll (d) Why this cxpcrimcrrtis not suitablcto bc uscd to dctcrnrincthc cmpirical lbrrnula of c o p p e r ( l l )o x i d e ' i ekperinten ini tidak sesuai cligunakan rrnluk ntencnlrrkun.fbrmt.tloemstirik Me.ngatrtakah kupmm(ll) oksida't

LI t?rcrrKs ) ll murktth) Diagram 5 shows thc sct up of thc apparatusof an cxpcrinrcnt to invcstigatcthc lransfbr ol electrons at a distance. Solution X is an oxidising agent and turns colour from purplc to colourlesssolution 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 kepacla larutan lidak berw,arna selepctsbeberapa minit bertindak balas.

Carbon Karbon

Carbon Kurbon iodidcsolution Potassium Lqrulan kal ium iotlicla

x

acicl Dilute sulphuric Asiclsulfurik cair Diagram5 Raiah 5

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454112

( l1 )

SULIT

The overall ionic equationfor the reactionis Persamaan ion keselnnthan bagi tindak balas yang berlaht adalah 2MnOa-+

l6H*

+

l0l-*2Mn2*

+

8H2O+ 5lz

(a) Statethe name of Solution X ltiyalukan numu larutun X

( l r) Cal :lte the oxidation number of manganesein MnOq-ion. I t, iungkan nombor pcngoksidaan bagi mangan dalam ion MnOq

11markl llmarkahl

[1 mark] llmarkahl (c) Statethc typc of rcaction that occursat elcctrodeA' Nltatakan jenis tindakbalas yang berlaku pada elektod A-

I markl llmarkahl ( t l ) Referring to the reaction that takes place at electrode B.

Menjuk kepada tindak balas yang berlaktt poda elektrod B' (i) Statethe observation? l{yatakon pemerhatian'/

[1 mark] llmarkahl (i i ) Writethehalf equationfor the reaction. Tulis setengahpersamaan bagi tindakbalas. ;,

Lt mqrK) llmarkah)

( i i i ) Explain the reactionthat occttrsin terms of transferof electron. Terangkan tindak balas yang berlaku dari segi pemindahan elektron-

[1 mark) ll markahl

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4s4rt2

(12) SULIT acidin tltisexpcrimcnt. (e) Statethefunctionof thedilutesulphuric Nyatakanfnngsi bagi asid sulJirik cair dalam eksperimenini.

ll rnarkf llrnarkahl (0

In othereiperimentyou arc givenzinc strip,copperstrip,coppcr(ll)sulphatesolution andall apparatusrequircd. to investigatcthc transfcrof Draw a labelleddiagrarnto showanothersct up of apparatus electronat a distance. Di dalam eksperimenlain andq dibekalkandengankepinganzink, kepingetnkupnrnt, larutan kuprum(Il) sulfat dan semuaradasyang diperlukan. Lukiskansatttgambarajah berlabel untukrnenunjukkansusunanrados bagi ntcnliiasctt pemindahanelektronpada satu.iarak.

12marksl [2 markahl

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454112 (13) SULIT of analcoholin the reaction thecombustion cquation belowreprescnts 6 Thethermochemical air. Persamaan termctkimia ctibawah ntewakili tindak balas pembakurcut sttnttt ulkohol eli trderrcr. C+HqOH + 60: + (a) (i)

4CO2 + 5H2O

LH:-2679 kJmol-'

Statethe name of the alcohol in the aboveequation. Nyatakan name elkohol di clalam persamaan di ateu'

[1 ntarkl flmarkahl

' (ii) What is mcantby'AH : -2679kJ mol-r in thc abovccquation'l Apakahyang dimaksudkandengan'AH: -2619kJ tnol-'\' dalampersamaan di atas?

ll 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 rclcascdby thc alcohol in thc reaction. r] [ M o l a r m a s so f t h c a l c o h o l : 7 4 g n r o l haba yang dibebaskan oleh qlkohol itu dalqm tindQk balas : lJisim molar alkohol 74 gmoltJ

ll markl llmarkahl (ii) the temperature change of water expected in the experiment in (b) fSpecific heat capacityof water: 4.2 J g'' "C-'l perubahem suhu etir yang chjangkakan dalam eksperimen inilHaba lenlu air; 4.2 J g'' "C'')

12marksl [2rnarkahl

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(r4)

su rT

454y2

(c) Drawtheenergylevcldiagramfor thecombustion of thc alcohol. lnkiskqn gamhar rclah ara.stenuguunlukStenbakqranulkohol ter.-ehut.

(d)

'l'ablc 6 s h o w st h c h e a to f c o m b u s t i o no f v a r i o u sa l c o h o l s . Jadual 6 menuniukkan hctbapembakqran pelbagai ulkohol. Numbcr of carbon atoms Bilangun atont karbon

) J

{+ j

Molecularformula Formulu molehul

Nameof alcohol Nama alkohol

CHrOH

Methanol Ethanol

CuHsOH c.r["l70t'l

Heat of combustion Habu pcmhakaran (kJ mol-')

-726 -1316

Propanol

C4II9OII

CsHrrOH

12mark,tl 12marlurh)

Pentanol

-2679 " " "J J-

-JJ

Table6 Jadual 6 (i)

Predicttheheatof combustion of propanol. Rqmalkanhabapembakaranbagi propanol.

11nturkl ll markah)

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SIILIT (ii)

4s41t2

(15)

Based on Table 6, explain why as the number of carbon atotns incrcasesso does the value of heat of con,bustion. Berdasarkan Rajah 6, terangkan mengapq apabila bilangun atom kqrbon bertambah nilai haba pentbakaranjuga bertambah.

12marks) 12markah)

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4541t2

(16)

SULIT

SectionB [20 marks] [20 markahl Answerany one question Jawabmane-manesalu soalan 1

W, X and Diagram7 showsthe symbolswhichrepresent threeelements, Rajah7 meru.rnjukkan simbolyang mewakili tiga unsur\N,X dan Y.

Diagram 7 Rajah 7 Basedon Diagram 7, answer the fbllowing questions: Berdasarkan Rajah 7, jawub soalon-soctlan berikut: (a)

What is representedby number 12 and 6 in tlre symbol of elernentW? Apakah yang rliwakili oleh angka 12 dan 6 dalum simbol bagi un,surW'/

12 marksl 12 ntctrkultf (b) Draw thc structurco1'linakrur of thc clcr-ncrrt X using tho modern atornic model. Lukis struktur dlunt lrdgi trtt.\'i.u'Xdengan trrenggttnakanmodel atom utoden. f4 nrurksl [4 ntarkah) (c)

Atoms W and X can form chernicalbondswith atom Y. Alom W dqn X boleh membenltrkikalan kimia dengan atom Y. Statethe type of chenriculbond anclexplain how the bond is formed between: Nyulukunjenis ikctlan kimirr dan terangkun bagaintuna ikulun terbenluk onlora: (i) Atoms W and Y Atom\N dan Y (ii)

A t o m s X a n CY Alctm X dan Y

110murlisl 110rnarkahl

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(17)

SULIT (d)

454U2

Describethe differencesin meltingpoint or electricalconductivityof the cornpound formedin (c) (i) and the compoundformedin (c) (ii). Huraikanperbezaandalam takat lebur utau kekonduksianelektrik bctgisebatianyung terbentukd, (cXj) dan bagi sehatianyangterbentukdi (c)(ii). [4 marl<sl 14markahl

8

(a) Ethenegasis bubblethroughbrominewater. Gas etenadialirkan melalui air bromin.

(b)

(c)

(i)

What is the observationandstatethe type of reactionhappens? Apakahpemerhatiandan nyatakanjeni.stindak balasyang berlaku?

(ii)

Give the nameand draw the structureformulaof the moleculeof the product. Berikan nama dan lukis formula struktur bagi molekul hasil tindak balas. [4 marks] [4 markahl

A hydrocarbonZ contains82.75o/o of carbonby mass. Satuhidrokarbon Z mengandungi82.75%korbon mengihttjisim. [Rclativeatomicnrass:H:l , C:12] lJisim atomrelatif: H=1, C:l2l (i)

Calculatetheempiricalformulaof Z. HitungkanJbrmulaempirikZ.

(ii)

Determincthemolecularfomrulaof Z if rclativemolecularmassof Z is 58. Tentukan.formula molekul bagi Z jika jisim molekul relatif Z odakrh 58. [7 marksl [7 markah]

Comparethe propertiesof vulcanisedrubberand unvulcanised rubber. Bandingkansilat-si/Al getah tervulkandan getah tak lervulkan. Your answershouldinclude the following propertiesof rubber: Jcrwapananda hendeklahmengandungisifat-sifotgetah berikut: (i)

Elasticity Kekenyalan (ii) Strengthandhardness Kekuatandan kekerasan (iii) Resistance towardoxidation Ketahanan terhadap p engoksidaan Give the reasonsfor all the propertiesabove. Berikan sebabbagi semuasifat-sifat di atas. 19marksl [9 markahl

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4511t2

( 1 8)

STII,IT

SectionCl [20 nrarks] l)0 murkuhl ,,1tt strar r/l/.t'ollc q tte.tt to t t .luwuh men d-nt(tt1u.sttlt r'srta Ittn (a) l.'ooclaclclitivcsarc chcruicalsthat ars uscd in processcdlbod' They l'tclpttr makc fbod last i , , l r g c r l. o o k b c t t c ra n t l t a s t cn l o r c d o l i o i o L l s . Stutc tlrc lbocl aclclitivcstltat arc sLritablcto Llcttscclfbr thc abovc purposcsa n d c x p l a i r r l r o t ' t h e a c l d i t i v c sa c t . hultan kimia yang tligunulun dolunt mukdnan .1ang IJLtlrttrtltrtttbttlt rtrukLrnttttrrtetrtrpttkcrrt dun lebih tliltt.rr.sc;;.ltt ntenolonc tncrtiuriilictnnttkunun Icrhttrtlttttttt, lielihttttrtt menurik .s'e tl u 1t.

digturcrkutt trttttrk tttitrttn di oltts don btrltutt ttrrnbrrJttrtolictttutt.t'(utg.r('strLti N1'rttttktrtt It:rutrgkun bttgttitrttttttrltultun itri herl itttltrli' Itr rtr,rr'lrr']

16 nrtn'liult) t t t a t l el i t t t t l I t i s t l l d . y c a r s l o r t y t h a n r n o r c ( b ) O L r r N u t i 6 6 a l M o n t r r n e n l i r r K r - r a l aL r - r r n p u ri s b e atrtilirl a n d s t r o l l g h i g h , s t i l l s t a n c l i n g b r o p z e . a n a l l o y o t ' s o l l p c r a r r c lu n t i l t o c l a y ,i t i s lu tulrtrn enlpul lehih trmttr ltttltth Ttrutt ,\it,grtrtrdi KrtttlttLrrtultrtt'.strt/tthmenjtrntl;tnr bcrdiri mLt't^ih itt sekordtlg diltpt.ttrtit tlrrt.iltut.lu gctrtgsti,strultrcrlr.tihrpt'r.rtn dcrn schittg;4u li'gtrlt, litrtrt Lltrn tttcttttt'ik. (i)

t c o l n p a f et h e h a l ' c l n e sosl a l l o y I { c l e r - r . i ptgg t h c s i t u a t i o na b o v e ,d e s c r i b co n e c x p c r i t t r e r }t o l i r l l o w i t t ga s p ec t ; t h c p t c t i r l . i n c l t r c l c s h o u l d Y e u l ex p l r n a t i o u l l . 9 p ti t s '\|ct.ttlttlikt'1lttt|tt,li|tttts'it|itt|tt.s''ltttt'ttr|ittt1.1'111111,l;-1:1lt't.itttt'rtttn|tt|rntentlltttttlittgk ltril;ttt' l t ) , q i t p y 4 : ( t . l ) ( , 1 1 , t ' ( y t ! ( t t t t t n t l t t n t t ' . s l i l t t l t r r t t : t ' t t r t , g l t t t t t t i, t t l t t k - t t s l t c l i

ttlpi tlttri

lvlatelills rncl altllarttttts l](tltdn

Jdtt t'ddLt.\

I)rocedut'e Krrt'tltrlt 'l a b u l a t i n go 1 ' d a t a l't'rrj t rt IttrtIt ttt tlttI tt ( ' t i n cl t t si o l t K t ' , ist t t l t tl u r rt

[9 mlrks] It) ntttt'litthl

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STILIT

1511t2

( i i ) [ 3 y u s i n g a l a l t c l c ccl l i a g r l r t ro f ' t h c a r l a n q c i r . r crurtl - l r t o u risn r . or r r c t aul r t r ,i lt s l l l o r , : ; . c . r p l a i nu , h v a l l r r vr s h . r r r l c trh a l i i t s r t r c L u i . [,)attgtttt tnctty,qtrttulirut.\uLtllt ,'uiult ltt'rlttltcl

l t t t . g i. r t r \ L u t i u t u 1 ( ) D t ( l ( t ! ( t t ) t l o g r r r t t , l , u ;

ttloirt.l'tt, !ertttt,qlittrt utL'n,g(u)l ttlrti lr,lttlt l\(t-(t,\'(lut't lollttnutIt:.t.

| 5 r r l r l l ' Is l5 rrrtrt'l,,tlrj

t0

A g r o u l to i p t r p i l se l r l r - i cocul I t \ \ , ( \)' \ i ) ! l i ] t t e : l lisi ) s t l t i l vi l r c n r t cr r l ' r c l r c t i oln- r c t r v e c t r t t l l t g t t c s i Ll t t rt ttl r t o i t i i t l s l. t r r l r r i e l t l r rrriict ti , ll l t t l : i i : j l l ' 1 l.' l l l t , llc( ) s l t o r i st l t ct l t r l llrl ' o r r r [ : . r p c r i n r c nI ta r r r L l r p c i i i r r r rl et t I i S t ' k t t t t t l t t t l t t t t t t t t i t l / t ' l t t l t t n t ' t t f t r l , t t t i t r t tt l t r t r r ' l ; s 1 ; , . ' t t t i r ,t.rtttt r t r kt t t t , t t i : l i r t l i t r t / t r t ' t i r r i / t i ll,t . t i t r s L t r t l t t t t r t t t t t . q t t t ' . : i t r r t t t l t ' t t , t , r r t , l r t i r , : : i , 1 . r ,i t' .i ;, .l r r , l : l t . ' t , l , r ! r u t L r . : i lt'i. . / u ' i t i , r l i O r t t r , i t t t t t l t r l , l i r t t t t / t t l t t t l t t t ' i l t t t t l t t I : k . s 1 t t ' tt t t t r ' t t I t l t t t r i , l t . s l ) tt t r ) t t ' n l l .

l l i p c r l i n r crr r l','k.s1tt't'i tn t't t l

Iielr'llriris

O b s c r rr t t i o r t

i'tirtll:i.i.,

lJtr I rt rrt t i rttlLtli ltt rl t r.s

,tiit..it

itrtt,i!t

I ' t ' t t t t :t 'I t t t I t t t t t

ittt,ltl.*

' ;.;

Jcrrl-.{)Ittol tlrrt

. l r l , ' , r ' i .,ir.r' r , i l r ' ,r l t , r . q crl,r.s

I l t t ' l e n i p t - l' t t r t u o I tltenlrr.trrr-e i r r er - e . r s es .

l l . ( t g 1t i t t r n t i t . t : t t ' \ 'i I t , ' ti ( l L ' i t , q ( t tl (] ) c r t t '

\ | t r , g r t t ' i. t; r l i t l , I t t t i L l t r

, \ t' t I t t t t t tt tt l t tt r ' ,t t t

. i r t r r: 1 , r ; I t : , l i t t r ! t ' r t

0 . ( r U t r r l r g t t . : \ l L i l l l' i b h ( ) n i l t t ( l i { l \ ' r t l r \ r l r , ' .1 1 1 ' , ' , '

I t . tt l t ' r t , l t I t t t i , r . 0 r t r o lt l r r r

.\ l,iglt!'.,Jllii-i

I t t t ' t t | | |! ! l , t t /

ttt ,'tt'

'l

l r e 1 t ' t t r p e n r l u l(r)' l l l r cn r i r t r r l e

0 . ( r g t t l t r , , , t r , . ' s irurri tl r l r o r r 'l l t t r r i- l ( t i r r r t r r i , j 1.0 Irrtil,lrtr

I l l ( ' l - C i ls ( JS .

II l l . 6 : , 1t i t , i t ] t , r . \ : ti , . \ 'i t / | | t i l i ' t t , g t t t -t l { ) r ' n r r l r ' r r l I

\ , l , i . t ' i ) :, , t t t i t s t t l l i t l i l ( | | t : : t i \ i t ! ( i )t ) . ! ( t I

\)ulnt

\'tttill)ut'(il1

iIt{'tIitlt:1.:(t/

l.() nrll tlrrr

I l r l - l cI 0 Jtt,lt,,t'1l\

i l.ilral Scbclirh ST'I,I'T

P E R C U B A ASNP N(l 2 0 0 9 -) K I I \ 1 IKAF R T A S 2

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SULIT (a) (i)

(20 ) Refening to ExperimentII, statethe nameof acid T used' write the chemicalequationfor the reactionof acidT with magnesium. MerujukEktperimenll, nyatakannamaasidT yang digunakan' Tuli.skanpersamaankimia bagi tiruJakbalas asidT denganmagnesium.

454u2

[2 marks] 12markahl (ii) Draw an energyprofile diagrarnfor thc reactionin l0(aXi). On the energyprofile diagramshowthe:

Explainthe energyprofile diagram Lukis satugambarraiah profrl tenaguuntuktindakbulusdi l0(a)(i)' Pada garnbar raiah profil tenagaitu tunjukkan:

Jetaskangambarrajahprofil tenagaitu. |0 marksl 110markahl

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(21)

SULIT

454U2

(b) Thegraphin Diagraml0 showstheresults of Experimcnt I andExperiment II. Graf pada Rajah l0 menttnjukkan keputusan bagi Eksperimen I dan Eksperimen

II

Volume of hydrogengasicml Is iputlu gus hidrogen/cmr

ExperimentII

ExperimentI EksperimenI

Tirne/s Masa/s Diagraml0 Raiah l0 Basedon the graph: Berdasarkangraf (i) Calculatethe averagerateof reactionfor ExperimentI Hitungkan kadar tindak balaspurata bagi EksperimenI [2 marks] [2 markah] (ii) Explainthe differencein the rateof reactionbetweenExperimentI and ExperimentIl. Terangkanperbezaankadar tindak balas qntara EksperimenI denganEl<sperimenlI. [6 marks] [6 markah]

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sULIT

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SULIT 4541/3 Kimia Kertas 3 September 2009 1 ½ jam

4541/3

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Nama Pelajar : .............................................................................. Tingkatan

:.................................................................................

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA SEKOLAH MENENGAH MALAYSIA CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009 SIJIL PELAJARAN MALAYSIA KIMIA Kertas 3 Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. Kertas soalan ini adalah dalam dwibahasa.

Kod Pemeriksa

1 2

Markah Penuh 33 17

JUMLAH

50

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

Markah Diperolehi

3. Calon dibenarkan menjawab keseluruhan atau sebahagian soalan samada dalam bahasa Melayu atau bahasa Inggeris 4. Calon dikehendaki membaca maklumat di halaman 2 dan 3

Kertas soalan ini mengandungi 12 halaman bercetak 4541/3

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INFORMATION FOR CANDIDITES http://spmchem.blogspot.com/

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 3 2 1 0

Description Excellent : The best response Satisfactory : An average response Weak : An inaccurate response No response or wrong response

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MAKLUMAT KEPADA CALON http://spmchem.blogspot.com/

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. Anda boleh menggunakan persamaan, rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda. 4. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah. 5. Sekiranya anda hendak menukarkan jawapan, batalkan dengan kemas jawapan yang telah 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 dalam kurungan. 8. Masa yang dicadangkan untuk menjawab Soalan 1 ialah 45 minit dan Soalan 2 ialah 45 minit. 9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan. 10. Serahkan kertas jawapan anda di akhir peperiksaan.

Pemberian Markah: Markah 3 2 1 0

Penerangan Cemerlang : Respon yang paling baik Memuaskan : Respon yang sederhana Lemah : Respon yang kurang tepat Tiada respon atau respon salah

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1. Diagram 1.1 shows the set-up of apparatus for an experiment to compare the reactivity of http://spmchem.blogspot.com/ alkali metals towards their reaction with oxygen. Rajah 1.1 menunjukkan susunan radas bagi satu eksperimen untuk membanding kereaktifan logam-logam alkali terhadap oksigen.

Gas jar Balang gas

Oxygen gas Gas oksigen Alkali metal Logam alkali

Diagram 1.1 Rajah 1.1

The experiment is carried out using a small piece of lithium, potassium and sodium respectively to react 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 secara berturutan bertindak balas dengan gas oksigen. Pemerhatisn ke atas logam-logam alkali dalam eksperimen ditunjukkan dalam Jadual 1.

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SULIT Set Set

http://smkbbf6chem.smfforfree.com/ Set-up of apparatus Susunan radas

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Observation Pemerhatian http://spmchem.blogspot.com/

White fumes Wasap putih Lithium burns slowly and produces white fume.

I

Lithium Litium

White fumes Wasap putih II

Potassium Kalium

White fumes Wasap putih III

Sodium Natrium Table 1 Jadual 1 4541/3

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(a) Look at the flame produced in each experiment in Table 1. Complete the Table 1 by stating http://spmchem.blogspot.com/ the observation for each reaction of alkali metals towards oxygen. Perhatikan nyalaan yang terhasil dalam setiap eksperimen dalam Jadual 1. Lengkapkan Jadual 1 dengan menyatakan pemerhatian ke atas nyalaan setiap tindak balas logam alkali 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:

____________________________ __________________________________________ ____________________________ __________________________________________ ____________________________ __________________________________________

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

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……………………………………………………………………………………… ……………………………………………………………………………………… [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 dengan gas oksigen. ……………………………………………………………………………………… ……………………………………………………………………………………… [3 marks] [3 markah]

(e) Based on the observation in Table 1, arrange lithium, potassium and sodium in descending order of reactivity towards oxygen. Berdasarkan pemerhatian dalam Jadual 1, susunkan litium, kalium dan natrium mengikut tertib 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 dengan oksigen. Rubidium lebih reaktif berbanding litium, kalium dan natrium. Ramalkan pemerhatian bagi tindak balas ini. ……………………………………………………………………………………… ……………………………………………………………………………………… [3 marks] [3 markah]

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

Set-up of apparatus Susunan radas pH value Nilai pH

13.19 pH meter Meter pH

I Litium hydroxide solution Larutan litium hidroksida pH value Nilai pH

13.61 pH meter Meter pH

II Potassium hydroxide solution Larutan natrium hidroksida

pH value Nilai pH

13.33 pH meter Meter pH

III Sodium hydroxide solution Larutan kalium hidroksida Diagram 1.2 Rajah 1.2 4541/3

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(i) Record the pH value to one decimal place for Set I, Set II and Set III. http://spmchem.blogspot.com/ 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] 4541/3

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(iv) The following is a list of chemical substances with pH value: Berikut ialah senarai beberapa bahan kimia dengan nilai pH Chemical substance Bahan kimia Ammonia solution Larutan ammonia Potassium hydroxide solution Larutan kalium hidroksida Sodium hydroxide solution Larutan natrium hidroksida

pH value Nilai pH 11 14 13

Classify these substances into strong alkali and weak alkali. Kelaskan bahan-bahan ini kepada alkali kuat dan alkali lemah. [3 marks] [3 markah]

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2

Diagram 2 shows two sets, Set I and Set II, of the apparatus set-up and the results for an experiment 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 satu eksperimen untuk mengkaji kesan logam X dan logam Y ke atas pengaratan besi.

Set Set

I

Apparatus set-up Susunan radas

Electrolyte Z Elektrolit Z

Result after 3 days Keputusan selepas 3 hari

Iron nail did not rust Paku besi tidak berkarat

Iron nail/Paku besi Metal X/Logam X

II

Electrolyte Z Elektrolit Z Iron nail/Paku besi

Iron nail rusted Paku besi berkarat

Metal Y/Logam Y

Diagram 2 Rajah 2 Referring to the information above, plan a laboratory experiment to investigate the effect of named metals X, Y and named electrolyte Z on the rusting of iron. Merujuk kepada maklumat di atas, rancangkan satu eksperimen dalam makmal untuk mengkaji kesan logam-logam X , Y yang dinamakan dan elektrolit Z yang dinamakan ke atas pengaratan besi.

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

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Problem statement Pernyataan masaalah

(b) All the variables Semua pembolehubah (c)

Hypothesis Hipotesis

(d) List of materials and apparatus Senarai bahan dan radas (e)

Procedure Prosedur

(f)

Tabulation of data Penjadualan data [17 marks]

END OF QUESTION PAPER KERTAS SOALAN TAMAT

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4541 Kimia Skema Pemarkahan September 2009

PERSIDANGAN KEBANGSAAN PENGETUA-PENGETUA SEKOLAH MENENGAH MALAYSIA CAWANGAN KELANTAN

PEPERIKSAAN PERCUBAAN 2009 SIJIL PELAJARAN MALAYSIA

KIMIA SKEMA PEMARKAHAN

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PEPERIKSAAN PERCUBAAN SPM 2009 CHEMISTRY MARKING SHEME 4541 ANSWER OF PAPER 1

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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

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3 MARKING SCHEME OF PAPER 2 QUESTION NO 1

(a)

(i) (ii) (iii) (iv)

(b)

(c)

2

(a) (b)

(c)

3

(i) (ii)

(d)

(i) (ii)

(e)

(ii)

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MARK

Marking Criteria

SUB

Alkali OH7 < pH <12 The concentration of hydroxide ions in Solution A is higher. The higher the concentration of OH- ions the higher the pH value. HCl + NaOH  NaCl + H2O Correct reactant Correct product MaVa = 1 (mole ratio 1:1) MbVb = 1 Va = 0.3 x 50 0.1 = 150 cm3 Group 16, Period 3 2D + 2H2O  2DOH + H2 Correct reactant & correct product Balance equation G The nuclei attraction towards the valence electrons is weaker in G. Thus it is easier for G to lose / release an electron to form a positively charged ion. F Has stable/octet electron arrangement // have 8 electron valence Show coloured ion//formed complex ion//has various oxidation number//act as catalyst

(a)

TOTAL

1 1 1 1 1 1+1

1 1 1 1+1 1 1 1 1 1

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1 1 1 1

Draw the connecting wire and voltmeter

(b) (c)

10

Labeling zinc plate  ( - ) and copper plate  ( + ) From zinc plate to copper plate through the external circuit

10

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4 (d) (e) (f) (g)

(i) (ii)

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To allow the flow of ion from both electrolyte through it to complete the circuit The zinc plate becomes thinner Cu2+ + 2e  Cu The voltage will be higher The silver metal is under the copper metal in the electrochemical series.

(h) B

1 1 1 1 1

0.1 A

1

C

0.8 For pair of metal A / B , the voltage produced = 0.8 – 0.1 = 0.7 V 1 4

(a)

(i)

(b)

(i)

The chemical formula that shows the simplest ratio of atoms of the elements present in a compound.

Element Unsur Mass (g) Number of moles Simplest ratio of moles Empirical formula

(ii) (c)

5

(d) (a) (b) (c) (d)

(e) (f) 4541

(i) (ii) (iii)

Mg 25.12 – 24.88 //0.24 0.24/24 // 0.01

1

O 25.28 – 25.12 //0.12 0.16/16 // 0.01

1+1 1+1

1

1 MgO

2Mg + O2 → 2MgO To ensure that all the magnesium reacts completely with oxygen. Copper is an unreactive element towards oxygen Acidified Potassium manganate(VII) +7 reduction Colourless solution turn brown 2I- → I2 + 2e Iodide ion release electron To allow the flow of ion from both electrolytes Functional diagram of simple cell Label

1

10

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5 6

(a)

(i) (ii)

(b)

(i)

(ii)

(c)

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Butanol The heat given off when 1 mol of butanol burn completely in excess oxygen is 2679 kJ. (1) Number of mole = 0.37 mol //0.005 mol 74 (2) Heat released = 0.005 x 2679/ 13.395 kJ/13.395 x 103 J (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 Draw and label of the energy axis in the form of arrow with two level of energy Formula/Name the reactants and products for exothermic reaction

1 1 1 1 1

1 1+1 11

Energy C4H9OH + 6O2 ∆H = -2679 kJmol-1 4CO2 + 5H2O (d)

4541

(i) (ii)

Any value between: -2016 kJ mol-1 ≤ ∆H ≤ - 2036 kJ mol-1 As the number of carbon atoms increases, there are more carbon dioxide and water molecules are produce Thus more bonds are formed

1 1+1

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Section B Marking Criteria

QUESTION NO

7.

(a)

(b)

MARK

12 represents the nucleon number. 6 represents the proton number.

Able to draw the structure of an atom elements X. The diagram should be able to show the following informations: 1. correct number and position of proton in the nucleus/ at the centre of the atom. 2. correct number and position of neutron in the nucleus/ at the centre of the atom. 3. correct number and position of electron circulating the nucleus 4. correct number of valence electrons

SUB

TOTAL

1 1

2

1 1

1 1

Sample answer: √- 4 e e-

ee-

-

e

e-

11p√1 2 12n √

e- √3 e-

ee-

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or ee-

11p + 12n e-

ee-

e-

e-

eee-

e-

(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 electron for sharing. Thus, atom W shares 4 pairs of electrons with 4 atoms of Y, forming a molecule with the formula WY4 // diagram

1 1 1 1 1

Y

Y

W

Y

Y

(ii)

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Atom X and atom Y form ionic bond. Atom X has the electron arrangement 2.8.1. and atom Y has the electron arrangement 2.8.7.

1 1

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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 a stable octet electron arrangement. Y+e Y-

1 1

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

1

X

Max

--

+

(d)

1

10

Y

The melting point of the ionic compound/ (b)(ii) is higher than that of the covalent compound/ (b)(i) . This is because in ionic compounds ions are held by strong electrostatic forces. 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.

1

OR

or

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

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1 1 1 1 max 4

1 1 1 1 1 Total

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(a)

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(i) 1. The brown colour of bromine water becomes colourless. 2. Ethene has undergone an addition reaction.

1 1

(ii) 1. The product is 1,2-dibromoethane 2. Br

1 1

H

(b)

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Br

C

C

H

H

4

H

(i)

1. % mass of hydrogen = 100 – 82.75 = 17.25 2. Moles ratio of C : H = 82.75/12 : 17.25/1 3. = 2 : 5 4. The empirical formula of Z is C2H5

1 1 1 1

(ii)

1. Let the molecular formula be (C2H5)n Therefore, (12x2 + 1x5)n = 58 n = 2 2. Hence, Z is C4H10

1 1 1

7

(c) Property (i) Elasticity

Unvulcanised rubber Less elastic. Reason: the rubber molecules can slide over each other easily when it is stretched.

(ii) Strength and hardness

Soft and less strong. Reason: the rubber molecules can slide over each other easily when it is stretched. Easily oxidised by oxygen. Reason: the number of carbon-carbon double bonds, C=C per molecule is high.

(iii) Resistance towards oxidation

Vulcanised rubber More elastic. Reason: the presence of sulphur cross-links can pull back the rubber molecules to their original positions after it is stretched. Stronger and harder. Reason: the presence of sulphur cross-links make sliding of rubber molecules more difficult. More resistance to oxidation. Reason: the number of carbon-carbon double bonds, C=C per molecule is low.

1 1+1

1 1+1

1 1+1

20

Total

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Section C 9 (a)

Food additives Flavouring Colouring Preservative Antioxidant

How food additives reacts makes food tastier colours food so that it looks more Attractive Prevent the growth of microorganism on food slow down the oxidation of food

1+1 1+1 1+1 1+1

* any three from above

(b) (i)

Sample answer; Apparatus: - 1 kg weight - ruler - retort stand and clamp - thread - steel ball Materials: - copper block - bronze block

1

1

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.

1 1 1 1

Able to construct the table: Experiment Diameter of dent on the copper block / mm Diameter of dent on the bronze block / mm

1

2

3

Average diameter/mm A1 A2 A3 A 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

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(c) Copper

Copper

Tin/ stanum

bronze

Copper

10

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

1 1 1

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

1 1

(a)

Able to state (i) Sulphuric acid Mg + H2SO4

MgSO4

+

1 1

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 ∆H If energy level diagram given, not energy profile diagram, award pt1 and pt2 only) Able to give explanation by stating the following information: 1. Reaction is exothermic 2. The reactants contain moare energy than the products 3. Heat given nout during bond formation is greater than heat absorbed during bond breaking 4. ∆H is the energy difference between the reactants and products 5. Activation energy, Ea must be overcome in order for the reaction to take place 6. The use of catalyst reduces the activation energy 4541

1 1 1 1 1

5

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(must correspond to the energy profile diagram: negative catalyst increases the activation energy) 7. the use of catalyst increases the frequency of effective collision between H+ ion and magnesium atom (Neagative catalyst reduces the frequency of effective collision between H+ and magnesium atom) any five points:

(b)

Note: If endothermic reaction: Pts 1,2,3 lost (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

1+ 1

= 2 cm3 s-1 (ii) Able to explain the difference in the rate of reaction by stating the following Information 1 1. The rate of reaction for Experiment II is higher/greater than Experiment I r: slower/faster 2. This is because sulphuric acid in Experiment II is diprotic/dibasic acid 3. Hydrochloric acid in Experiment I is monoprotic/monobasic acid (Basicity of acid in Experiment II is higher than acid in Experiment I gives pts 2 and 3) 4. Diprotic acid has higher concentration of H+ ion //monoprotic acid has lower concentration of H+ ion a: more/higher number/less H+ 5. The frequency of collision between H+ ion and magnesium in Experiment II is higher than in Experiment I// The frequency of collision between H+ ion and magnesium in Experiment I is lower than in Experiment II r: between particles

1 1

1

6

1

1

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

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MARKING SCHEME OF PAPER 3 Question 1(a)

Explanation

Maximum score

[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.

[Able to state any one observations correctly] [Able to state any one observations incompletely]

3

2 1

Sample answer: Set

Observation

II

Potassium burns vigorously // produces white fume.

III

Sodium burns rapidly // produces white fume.

[No response given or wrong response] Question

1 (b)

Explanation

0 Maximum score

[Able to state three variables and the way to control them correctly] Sample answer: Manipulated variable:

Use different type of alkali metals

Type of alkali metals Responding variable: Reactivity of alkali metals Fixed variable: Oxygen gas // size of alkali metals

Observe the burning/reactivity of alkali metals when react with oxygen gas. Use oxygen gas in each experiment // Use the same size of metals.

[Able to state any 5 of the above information correctly] [Able to state any 4 of the above information correctly ] [Able to state any 3 of the above information correctly] [Able to state any 2 of the above information correctly ] [Able to state any 1 of the above information correctly ]

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Question

1 (c)

Explanation

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0 Maximum score

[Able to state the relationship between the manipulated variable and the responding variable with direction correctly] Sample answer:

3

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

[Able to state the relationship between the manipulated variable and the responding variable] Sample answer:

2

The lower position of an alkali metal in the Periodic Table, the more reactive is the metal. [Able to state an idea of hypothesis] Sample answer:

1

Alkali metal have different reactivity.

[No response given or wrong response] Question

1 (d)

Explanation

0 Maximum score

[Able to state the inference completely ] Sample answer: 1. Lithium is the least reactive metal towards oxygen.

3

2. Lithium oxide is formed. [Able to state the inference but not completely] Any one inference 2 [Able to state an idea of inference]

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Sample answer: Reaction occurs

1

[No response given or wrong response]

0

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Question

1 (e)

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

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Maximum score 3

Sample answer: Potassium/K, Sodium/Na, Lithium/Li [Able to arrange the position of at least two metals in descending order of reactivity correctly]

2

Sample answer: Potassium/K, Sodium/Na // Sodium/Na, Lithium/Li [Able to give an idea to arrange the metals] 1 Sample answer: Lithium/Li, Sodium/Na, Potassium/K [No response given or wrong response] Question 1(f)

Explanation

0 Maximum score

[Able to predict the observation for the reaction between rubidium and oxygen correctly ] Sample answer:

3

Rubidium burns more vigorously and produces white fume.

[Able to predict the observation for the reaction between rubidium and oxygen ] Sample answer:

2

Rubidium burns more vigorously.

[Able to state an idea to predict the observation for the reaction between rubidium and oxygen correctly ] Sample answer:

1

The reaction is more reactive. [No response given or wrong response]

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Question

1 (g)(i)

Explanation

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Maximum score

[Able to record all the pH meter reading with one decimal place accurately]: Sample answer: Set I : 13.2

3

Set II : 13.6 Set III : 13.3 [Able to record any two readings accurately] Or [Able to record all the pH meter reading without one decimal place correctly] [Able to record any one readings correctly] [No response given or wrong response] Question 1(g)(ii)

Explanation

2

1 0 Maximum score

Able to construct a table to record the pH value for Set I, Set II and Set III of experiment that contain : 1. Correct titles 2. 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 Able to construct a table with at least one title/reading. [No response given or wrong response]

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Question 1(g)(iii)

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Explanation

Maximum score

[Able to state the operational definition for alkali correctly] Sample answer:

3

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

[Able to state the operational definition for alkali ] Sample answer:

2

pH value that is more than 7.

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

1

pH value that is 13. [No response given or wrong response] Question 1(g)(iv)

0

Explanation

Maximum score

[Able to classify all the substances correctly] Sample answer:

Strong alkali Sodium hydroxide solution Potassium hydroxide solution

Weak alkali Ammonia solution

[Able to classify any two substances correctly] [Able to classify any one substance correctly] [No response given or wrong response]

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3

2 1 0

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KK051201-[To state problem statement] Score Explanation/Rubric 2(a)

Maximum score

Able to give the statement of problem by relating the following 4 information correctly: 1. different metals 2. contact 3. electrolyte 4. rusting Response is in question form:

3

Sample answer: How do/(Do) different type of metals / (metals X and Y) in contact with iron in the presence of an electrolyte affect rusting of iron ? // What is the effect on the rusting of iron, when it is in contact with other metals (metals X and Y) in the presence of an electrolyte? Able to give the statement of problem. Response is in question form: 2 Sample answer: How do different type of metals / (metals X and Y) affect rusting? Able to give an idea of statement of the problem. 1

Sample answer: To investigate the effect of different type of metals on rusting//Does electrolyte /X/Y/metal affect iron rusting? No response or wrong response.

0

[KK051202-To state all variables] Score Explanation/Rubric 2(b)

Maximum score

Able to state all variables correctly: Sample answer: Manipulated variable: metal X and metal Y // stating 2 metals which one metal is less electropositive and one metal is more electropositive than iron.// pairs of X-Fe and Y-Fe

3

Responding variable: the rusting of iron // iron rusts or does not rust // [any suitable observations: e.g. the formation of blue spot// the formation 4541

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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

No response or wrong response.

0

[KK051202-To state a hypothesis] Score Explanation/Rubric 2(c)

Maximum score

Able to state the relationship between the manipulated variable and the responding variable with direction correctly: 3 Sample answer: Metal Y causes iron nail rusting while metal X does not.// A more electropositive metal/(metal X) will prevent iron from rusting while a less electropositive metal (metal Y) will be rusting iron. Able to state the relationship between the manipulated variable and the responding variable: 2 Sample answer: Metal Y speeds up iron nail rusting while metal X slows down rusting. Able to state an idea of hypothesis: 1

Sample answer: Metal X / Y affect the rusting of iron. No response or wrong response.

0

[KK051203-list of materials and apparatus] Score Explanation/Rubric 2(d)

Maximum score

Able to give a complete list of materials and apparatus that involves the following: 3

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iron nails 1 metal above iron in electrochemical series 1 metal below iron in electrochemical series 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 paper Able to give a list of materials and apparatus that involves the following: 2

1. 1 metal above iron in electrochemical series 2. 1 metal below iron in electrochemical series 3. Any suitable electrolyte, any suitable container Able to give a list of materials and apparatus that involves the following: 1. 1 metal above/below iron in electrochemical series// any suitable electrolyte. 2. any container No response or wrong response.

0

[KK051203-procedure of the experiment] Score Explanation/Rubric 2(e)

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Maximum score

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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6. Record your observations. Steps 2,4,6

2

Step 2[coil iron nail with Mg/Cu], 4 1 0

No response or wrong response. [KK051202-To make tabulation of data] Score Explanation/Rubric 2(f)

Maximum score

Able to exhibit the tabulation of data that includes the following four information. 2 1. Heading for the manipulated variables 2. Examples of Sets//pair of metals 3. Heading for responding variable 4.2x3 or 3x2 table

Set//pair of metals I, II//Mg-Fe, Cu-Fe observation

Sample answer: Set//Pair of metals I//Mg-Fe II//Cu-Fe

Observation

Able to exhibit the tabulation of data that includes the following two information.

1

1. 1/3 from score 2 2. 2x2 table Sample answer: Set//Pair of metals

No response or wrong response.

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Observation

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END OF MARKING SCEME

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