kimia sbp spm 2012

SULIT 1 4541/1

4541/1Hak Cipta BPSBPSK [Lihat halaman sebelah] SULIT

4541/1 SULIT CHEMISTRY Kertas 1 Ogos 2012 1 ¼ jam

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH DAN SEKOLAH KECEMERLANGAN

KEMENTERIAN PELAJARAN MALAYSIA

PENTAKSIRAN DIAGNOSTIK AKADEMIK SBP 2012

SIJIL PELAJARAN MALAYSIA

CHEMISTRY

Kertas 1

Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Arahan: 1. Kertas soalan ini adalah dalam dwibahasa. 2. Soalan dalam Bahasa Inggeris mendahului soalan yang sepadan dalam Bahasa Melayu. 3. Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.

Kertas ini mengandungi 31 halaman bercetak

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SULIT 2 4541/1


1 Which substance consists of atoms?

Bahan manakah terdiri daripada atom?

A Neon Neon

B Water Air

C Hydrogen Hidrogen

D Ammonia Ammonia

2 One mole of nitrogen, N2 and one mole of sulphur trioxide, SO3 have Satu mol nitrogen, N2 dan 1 mol sulfur trioksida, SO3 mempunyai

A the same number of molecules

bilangan molekul yang sama B the same number of atoms

bilangan atom yang sama C the same proton number

nombor proton yang sama D the same mass

jisim yang sama

3 The following information is about element X. Maklumat berikut adalah mengenai unsur X.

Can be used as catalyst in industry Boleh digunakan sebagai mangkin dalam industri Forms complex ions Membentuk ion kompleks

Which of the following is correct about element X? Antara berikut yang manakah benar mengenai unsur X?

A

It is a soft solid Ia adalah satu pepejal lembut

B It has a low melting point Ia mempunyai takat lebur yang rendah

C

It forms coloured compounds Ia membentuk sebatian berwarna

D It cannot conduct electricity in solid state Ia tidak boleh mengalirkan elektrik dalam keadaan pepejal


SULIT 3 4541/1


4 Methane is a covalent compound.

Which of following is correct about methane? Metana adalah satu sebatian kovalen. Antara berikut yang manakah betul tentang metana?

A Cannot conduct electricity Cannot conduct electricity Tidak boleh mengalirkan arus elektrik

B Has high boiling point Mempunyai takat didih yang tinggi

C Dissolves in water Larut dalam air

D Has low volatility Mempunyai kemeruapan yang rendah

5 Diagram 1 shows an electrolytic cell. Rajah 1 menunjukkan satu sel elektrolitik

Diagram 1 Rajah 1 Which substance is suitable to be used as an electrolyte? Bahan manakah sesuai digunakan sebagai satu elektrolit?

A Sodium hydroxide solution Larutan natrium hidroksida

B Glucose solution Larutan glukosa

C Ethyl ethanoate Etil etanoat

D Ethanol Etanol

Carbon electrodes Elektrod karbon

Electrolyte Elektrolit


SULIT 4 4541/1


6 Which of the following is correct about acid?

Antara berikut yang manakah betul tentang asid?

A The taste is bitter Rasanya pahit

B The pH value is more than 7 Nilai pH lebih daripada 7

C Change red litmus paper to blue Menukarkan kertas litmus merah ke biru

D Ionised in water to produced hydrogen ion Mengion dalam air menghasilkan ion hidrogen

7

Diagram 2 shows the stages involved in the Contact Process to produce sulphuric acid. Rajah 2 menunjukkan peringkat-peringkat yang terlibat dalam Proses Sentuh untuk menghasilkan asid sulfurik.

SO2 I SO3 II

H2S2O7 III H2SO4

What is the optimum temperature and the catalyst used in stage I? Apakah suhu optimum dan mangkin yang digunakan dalam peringkat I?

Temperature ( oC)

Suhu ( oC) Catalyst Mangkin

A 200 Manganese(IV) oxide Mangan(IV) oksida

B 450 Vanadium(V) oxide Vanadium(V) oksida

C 450 Iron Besi

D 200 Nickel Nikel

Diagram 2 Rajah 2


SULIT 5 4541/1


9 Diagram 3 shows the decomposition of hydrogen peroxide at room temperature. Rajah 3 menunjukkan penguraian hidrogen peroksida pada suhu bilik.

Diagram 3 Rajah 3

What should be done to increase the rate of decomposition of hydrogen peroxide? Apakah yang perlu dilakukan untuk meningkatkan kadar penguraian hidrogen peroksida?

A Add water Tambah air

B Add catalyst Tambah mangkin

C Use small beaker Gunakan bikar lebih kecil

D Cool the hydrogen peroxide Sejukkan hidrogen peroksida

8 Which reagent is used to identify the present of chloride ion, Cl in a solution? Reagen manakah digunakan untuk mengenal pasti kehadiran ion klorida, Cl- dalam satu larutan?

A Silver nitrate Argentum nitrat

B Barium sulphate Barium sulfat

C Sodium hydroxide Natrium hidroksida

D Potassium thiocyanate Kalium tiosianat

Hydrogen peroxide Hidrogen peroksida


SULIT 6 4541/1


10 Diagram 4 shows the structural formula of a hydrocarbon compound.

Rajah 4 menunjukkan formula struktur bagi satu sebatian hidrokarbon. What is the name of the compound based on IUPAC nomenclature? Apakah nama sebatian ini berdasarkan penamaan IUPAC?

A 2- methylbut-2-ene 2-metilbut-2-ena

B 2 -methylbut-3-ene 2-metilbut-3-ena

C 3- methylbut-2-ene 3-metilbut-2-ena

D 3- methylbut-3-ene 3-metilbut-3-ena

11 The chemical equation represents the reaction between zinc oxide, ZnO and carbon monoxide, CO. Persamaan kimia mewakili tindak balas antara zink oksida, ZnO dan karbon monoksida, CO. ZnO + CO Zn + CO2 What is the role of carbon monoxide in this reaction? Apakah peranan karbon monoksida dalam tindak balas ini?

A Dehydrating agent Agen penghidratan

B Reducing agent Agen penurunan

D Oxidising agent Agen pengoksidaan

D Catalyst Mangkin

Diagram 4 Rajah 4

=


SULIT 7 4541/1


12 Which chemical reaction releases heat to the surrounding?

Tindak balas kimia manakah yang membebaskan haba ke persekitaran?

A Dissolving sodium hydroxide in water Melarutkan kalsium karbonat ke dalam air

B Dissolving ammonium nitrate in water Melarutkan ammonium nitrat dalam air

C Dissolving potassium carbonate in water Melarutkan kalium karbonat dalam air

D Dissolving potassium hydrogen carbonate in water Melarutkan kalium hidrogen karbonat ke dalam air

13 Diagram 5 shows the electron arrangement of oxygen atom.

Rajah 5 menunjukkan susunan elektron bagi atom oksigen. Which of the following is correct about this atom? Antara berikut, yang manakah betul tentang atom ini?

A The proton number is 6 Nombor proton ialah 6

B The nucleon number is 8 Nombor nukleon ialah 8

C The number of neutrons is 6 Bilangan neutron ialah 6

D The number of electrons is 8 Bilangan elektron ialah 8

Diagram 5 Rajah 5


SULIT 8 4541/1


14 Which food additive can prevent the activity of microorganism in food?

Bahan tambah makanan manakah boleh menghalang aktiviti mikroorganisma dalam makanan?

A Pectin

Pektin B Lecithin

Lecitin C Benzoic acid

Asid benzoik D Ascorbic acid

Asid askorbik 15 Diagram 6 shows the set-up of apparatus to determine the empirical formula of P

oxide. What is P oxide? Rajah 6 menunjukkan susunan radas untuk menentukan formula empirik bagi oksida P. Apakah oksida P? Crucible P oxide Mangkuk pijar Oksida P Diagram 6 Rajah 6

A Silver oxide Argentum oksida

B Lead (II)oxide Plumbum (II) oksida

C Copper (II) oxide Kuprum(II) oksida

D Magnesium oxide Magnesium oksida

Heat Panaskan


SULIT 9 4541/1


16 Diagram 7 shows the set-up of apparatus for a simple voltaic cell.

Rajah 7 menunjukkan susunan radas bagi satu sel voltan ringkas.

Diagram 7 Rajah 7 Which pair of metal will produced the highest voltmeter reading when it is used as electrode P and electrode Q? Pasangan logam manakah akan menghasilkan bacaan voltmer paling tinggi apabila ia digunakan sebagai elektrod P dan elektrod Q? P Q A Magnesium

Magnesium Silver Argentum

B Zinc Zink

Iron Ferum

C Tin Stanum

Lead Plumbum

D Aluminium Aluminium

Copper Kuprum

Electrode Q Elektrod Q

Electrode P Elektrod P

Copper(II) sulphate solution Larutan kuprum(II) sulfat


SULIT 10 4541/1


17 Metal X is soft and shiny. It reacts with cold water to produce an alkaline solution.

What is metal X? Logam X adalah lembut dan berkilat. Ia bertindak balas dengan air untuk menghasilkan larutan yang bersifat alkali. Apakah logam X? A

Magnesium Magnesium

B Sodium Natrium

C Copper Kuprum

D Zinc Zink

18 Which acid ionises completely in water?

Asid manakah mengion dengan lengkap dalam air? A CH3COOH B H3PO4 C H2CO3 D H2SO4

19 Which pair of solutions produces an insoluble salt?

Pasangan larutan manakah menghasilkan satu garam tak terlarutkan?

A Nitric acid and silver nitrate solution Asid nitrik dan larutan argentum nitrat

B Potassium sulphate solution and zinc chloride solution Larutan kalium sulfat dan larutan zink klorida

C Copper(II) sulphate solution and lead(II) nitrate solution Larutan kuprum(II) sulfat dan larutan plumbum(II) nitrat

D Magnesium nitrate solution and copper(II) chloride solution Larutan magnesium nitrat dan larutan kuprum(II) klorida


SULIT 11 4541/1


20 Diagram 8 shows part of a Periodic Table of Elements.

Element F reacts with element G to form a compound. Rajah 8 menunjukkan sebahagian daripada Jadual Berkala Unsur. Unsur F bertindak balas dengan unsur G membentuk satu sebatian.

Diagram 8 Rajah 8 Which properties are correct for the compound formed between element F and element G? Sifat manakah adalah betul bagi sebatian yang terbentuk antara unsur F dan unsur G?

Boiling point (oC) Takat didih (oC)

Solubility in water Keterlarutan dalam air

A Low Rendah

Does not dissolve Tidak larut

B High Tinggi

Dissolves Larut

C High Tinggi

Does not dissolve Tidak larut

D Low Rendah

Dissolves Larut

G F


SULIT 12 4541/1


21 Which statements are true about the effect of concentration of reactants on the rate of

reaction based on the collision theory? Pernyataan manakah betul tentang kesan kepekatan bahan tindak balas ke atas kadar tindak balas berdasarkan teori perlanggaran?

I The kinetic energy of the reactant particles increases. Tenaga kinetik zarah-zarah bahan tindak balas bertambah.

II The frequency of collision between reactant particles increases. Frekuensi perlanggaran antara zarah-zarah bahan tindak balas bertambah.

III The number of reactant particles per unit volume increases Bilangan zarah-zarah bahan tindak balas per unit isi padu bertambah.

IV

The activation energy of the reactant particles increases. Tenaga pengaktifan zarah-zarah bahan tindak balas bertambah.

A I and III only I dan III sahaja

B I and IV only I dan IV sahaja

C II and III only II dan III sahaja

D II and IV only II dan IV sahaja

22 Ceramic is suitable for making the exterior of space shuttle because ceramic

Seramik sesuai digunakan untuk membuat bahagian luar kapal angkasa kerana seramik

A can store charges boleh menyimpan cas

B has high melting point mempunyai takat lebur tinggi

C can resist to chemical corrosion tahan terhadap kakisan kimia

D can withstand high pressure and heat tahan terhadap haba dan tekanan tinggi


SULIT 13 4541/1


23 Which statement best explains why vulcanised rubber is more elastic than

unvulcanised rubber? Pernyataan manakah paling baik menerangkan mengapa getah tervulkan lebih elastik daripada getah tak tervulkan?

A Size of molecule of vulcanised rubber is bigger. Saiz molekul getah tervulkan lebih besar.

B The melting point of vulcanised rubber is higher. Takat lebur getah tervulkan lebih tinggi.

C Vulcanised rubber has less double bond between carbon atoms. Getah tervulkan mempunyai kurang ikatan ganda dua antara atom-atom karbon.

D Presence of sulphur cross-linkage pulls the vulcanised rubber molecule back to their original position. Kehadiran rantai silang sulfur menarik molekul getah tervulkan kembali kepada kedudukan asal.

24 Fe3+ ion solution can be converted to Fe2+ ions by adding zinc powder. Which substance can be used to replace zinc powder in this reaction? Larutan ion Fe3+ boleh ditukarkan kepada ion Fe2+ dengan menambah serbuk zink. Bahan manakah boleh digunakan untuk menggantikan serbuk zink dalam tindak balas ini? A Chlorine water

Air klorin B Potassium iodide solution

Larutan kalium iodida C Potassium hexacynoferrate(II) solution

Larutan kalium heksasianoferat(II) D Acidified potassium manganate(VII) solution

Larutan kalium manganat(VII) berasid


SULIT 14 4541/1


25 The thermochemical equation represents a reaction between Ag+ and Cl-.

Persamaan termokimia mewakili tindak balas antara Ag+ dan Cl-. Ag+(aq) + Cl-(aq) AgCl(s); H = ─65.5 kJmol-1 Ag+(ak) + Cl-(ak) AgCl(p); H = ─65.5 kJmol-1 Which of the following is correct about the equation? Antara berikut yang manakah betul tentang persamaan itu?

A Heat is released to the surroundings Haba dibebas ke persekitaran

B The temperature of the mixture falls Suhu campuran menurun

C 65.5 kJ of heat energy is absorbed to form 1 mol of silver chloride 65.5 kJ tenaga haba diserap membentuk 1 mol argentum klorida

D The total energy of reactants is lower than the total energy of products Kandungan tenaga bahan tindak balas lebih rendah daripada kandungan tenaga hasil tindak balas

26 Diagram 9 shows the structure of ions of cleaning agents P and Q. Rajah 9 menunjukkan struktur bagi ion agen pencuci P dan Q.

Diagram 9 Rajah 9

Which statement is true about cleaning agents P and Q? Pernyataan manakah benar tentang agen pencuci P dan Q?

A Cleaning agent P dissolves in soft water but cleaning agent Q forms a precipitate in soft water. Agen pencuci P larut dalam air lembut tetapi agen pencuci Q membentuk mendakan dalam air lembut.

B Cleaning agents P and Q have the hydrophobic part that are dissolve in water. Agen pencuci P dan Q mempunyai bahagian hidrofobik yang larut dalam air.

C Cleaning agent P is less effective than cleaning agent Q in hard water. Agen pencuci P lebih berkesan daripada agen pencuci Q dalam air liat.

D Cleaning agents P and Q form precipitate in acidic water. Agen pencuci P dan Q membentuk mendakan dalam air berasid.

COO-

SO3

-

P Q


SULIT 15 4541/1


27 Which diagram shows the arrangement of particles that has the strongest attraction force between the particles? Rajah manakah menunjukkan susunan zarah yang mempunyai daya tarikan antara zarah yang paling kuat?

A

B

C

D


SULIT 16 4541/1


28 Diagram 10 shows the arrangement of atoms in bronze. Rajah 10 menunjukkan susunan atom dalam gangsa. Which statement explains why bronze is harder than pure copper? Pernyataan manakah menerangkan mengapa gangsa lebih kuat daripada kuprum tulen?

A The arrangement of atoms is more compact in bronze.

Susunan atom lebih padat dalam gangsa. B There are no empty spaces between atoms in bronze.

Tiada ruang kosong dalam gangsa. C Layers of atoms are not easily to slide in bronze.

Lapisan atom sukar menggelongsor dalam gangsa. D Strong bonds are formed between copper atoms and tin atoms in bronze.

Ikatan yang kuat terbentuk antara atom kuprum dan atom stanum dalam gangsa.

29

Table 1 shows the proton number for element X and element Y. Jadual 1 menunjukkan nombor proton bagi unsur X dan unsur Y.

Element Unsur

Proton number Nombor proton

X 13 Y 8

Table 1 Jadual 1 What is the formula of the compound formed when element X reacts with element Y? Apakah formula bagi sebatian yang terbentuk apabila unsur X bertindak balas dengan unsur Y?

A X2Y B XY2 C X3Y2 D X2Y3

Copper atom Atom kuprum Tin atom Atom stanum

Diagram 10 Rajah 10


SULIT 17 4541/1


30 Which statements are true about elements when going across Period 3? Pernyataan manakah betul mengenai unsur-unsur apabila merentasi Kala 3?

I

The atomic size of elements increase. Saiz atom bagi unsur-unsur semakin bertambah.

II The electronegativity of atoms of the elements increase. Keelektronegatifan atom bagi unsur-unsur semakin bertambah.

III The properties of the oxide of the elements change from basic oxide to ampotheric oxide and acidic oxide. Sifat oksida berubah daripada oksida bes kepada oksida amfoterik dan oksida asid.

IV The nuclei force of attraction of atoms towards electron to achieve stable electron arrangement becomes weaker. Daya tarikan nukleus atom terhadap elektron untuk mencapai susunan elektron yang stabil semakin lemah.

A I and II I dan II

B II and III II dan III

C III and IV III dan IV

D I and IV I dan IV

31 Electrolysis of 1.0 mol dm-3 of solution X is carried out using carbon electrodes. A yellow gas is released at the anode. What is solution X? Elektrolisis larutan X 1.0 mol dm-3 dijalankan menggunakan elektrod karbon. Satu gas kuning terbebas di anod. Apakah larutan X?

A Sodium bromide Natrium bromida

B Sodium chloride Natrium klorida

C Potassium iodide Kalium iodida

D Potassium hydroxide Kalium hidroksida


SULIT 18 4541/1


32

The equation represents a reaction between potassium hydroxide solution and ammonium sulphate. Persamaan mewakili tindak balas antara larutan kalium hidroksida dan ammonium sulfat. KOH + (NH4)2SO4 substance X + gas Y + H2O KOH + (NH4)2SO4 substance X + gas Y + H2O

What is substance X and gas Y? Apakah bahan X dan gas Y?

Substance X Bahan X

Gas Y Gas Y

A Ammonium hydroxide Ammonium hidroksida

Ammonia Ammonia

B Ammonium hydroxide Ammonium hidroksida

Nitrogen dioxide Nitrogen dioksida

C Potassium sulphate Kalium sulfat

Ammonia Ammonia

D Potassium nitrate Kalium nitrat

Nitrogen dioxide Nitrogen dioksida

33 Diagram 11 shows the energy profile for a reaction.

Rajah 11 menunjukkan profil tenaga bagi satu tindak balas. Diagram 11 Rajah 11 What is the heat of reaction for this reaction? Apakah haba tindak balas bagi tindak balas ini?

A -40 kJ mol-1 B -42 kJ mol-1 C -68 kJ mol-1 D -110 kJ mol-1

A + B

C + D 28

68

110

Energy Tenaga


SULIT 19 4541/1


34 Diagram 12 shows the activation energy, Ea in an energy profile diagram of the reaction between zinc granules and hydrochloric acid. Rajah 12 menunjukkan tenaga pengaktifan,Ea dalam gambar rajah profil tenaga bagi tindak balas antara ketulan zink dan asid hidroklorik.

Diagram 12 Rajah 12

Which method is suitable to get lower activation energy, Ea’ in the reaction? Kaedah manakah sesuai digunakan untuk mendapatkan tenaga pengaktifan, yang lebih rendah,Ea’ dalam tindak balas itu?

A Use zinc powder Gunakan serbuk zink

B Cool the hydrochloric acid Sejukkan asid hidroklorik

C Add copper(II) sulphate solution Tambahkan larutan kuprum(II) sulfat

D Increase the concentration of hydrochloric acid Tinggikan kepekatan asid hidroklorik

Energy Tenaga

Zn + 2HCl

ZnCl2 + H2 2HCl

Ea

Ea’


SULIT 20 4541/1


35 Table 2 shows the observations for two chemical tests to identify a type of cation in a solution. Jadual 2 menunjukkan pemerhatian bagi dua ujian kimia untuk mengenal pasti satu jenis kation dalam satu larutan.

Test Ujian

Step Langkah

Observation Pemerhatian

I Add excess sodium hydroxide solution into the solution Tambah larutan natrium hidroksida berlebihan ke dalam larutan

Blue precipitate Mendakan biru

II Add excess ammonia solution into the solution Tambah larutan ammonia berlebihan ke dalam larutan

Table 2 Jadual 2

What is observed in test II? Apakah yang diperhatikan dalam ujian II?

A A brown ring is formed Cincin perang terbentuk

B A green precipitate is formed Mendakan hijau terbentuk

C A dark blue solution is formed Larutan biru tua terbentuk

D A colourless solution is formed Larutan tidak berwarna terbentuk


SULIT 21 4541/1


36 Diagram 13 shows a racing car. The body of the car is made of substance X. Rajah 13 menunjukkan sebuah kereta lumba. Badan kereta tersebut diperbuat daripada bahan X.

Diagram 13

Rajah 13

Substance X has the following properties: Bahan X mempunyai ciri-ciri berikut:

strong kuat

light ringan

withstand high temperature tahan suhu yang tinggi

durable tahan lasak

Which of the following is substance X? Antara berikut manakah bahan X?

A Steel Keluli

B Perspex Perspek

C Ceramic Seramik

D Fibre glass Gentian kaca

Substance X Bahan X


SULIT 22 4541/1


37 Diagram 14 shows the label on a bottle of an orange juice.

Rajah 14 menunjukkan label pada sebotol jus oren.

Diagram 14 Rajah 14 Which substance will enhanced the flavour and smell of the orange juice? Bahan tambah makanan manakah akan meningkatkan rasa dan bau pada jus oren itu?

A Octyl ethanoate

Oktil etanoat B Sulphur dioxide

Sulphur dioxida C Ascorbic acid

Asid askorbik D Tatrazine

Tatrazina

Ingredients : Orange juice, sugar, water, tatrazine, sulphur dioxide, octyl ethanoate, ascorbic acid Kandungan : Jus oren, gula, air, tatrazina, sulfur dioksida, octil etanoat, acid askorbik

Expiry date 30102012 Tarikh luput 30102012


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SULIT 23 4541/1


38 Diagram 15 shows the apparatus set-up for the reaction between carbon and metal T

oxide. Rajah 15 menunjukkan susunan radas bagi tindakbalas antara karbon dan oksida logam T. Diagram 15 Rajah 15

When the mixture is heated strongly, a flame spreads to the whole mixture. What is metal T? Apabila campuran itu dipanaskan dengan kuat, nyalaan tersebar ke seluruh campuran. Apakah logam T?

A Zinc Zink

B Copper Kuprum

C Magnesium Magnesium

D Aluminium Aluminium

39 A patient is experiencing depression and difficulty in sleeping. Which medicine is suitable for treating the patient? Seorang pesakit mengalami tekanan dan kesukaran untuk tidur. Ubat manakah sesuai untuk merawat pesakit itu?

A

Codeine Kodeina

B Barbiturate Barbiturat

C Paracetamol Parasetamol

D Streptomycin Streptomisin

Mixture of carbon powder and metal T oxide Campuran serbuk karbon dan oksida logam T Heat

Panaskan


SULIT 24 4541/1


40 Which substance is a liquid at room temperature?

Bahan manakah adalah cecair pada suhu bilik?

Substance Bahan

Melting point (oC) Takat lebur (oC)

Boiling point (oC) Takat didih (oC)

A -35 10 B 45 240 C -255 -170 D 15 130

41 Table 3 shows the observation when metals L, M and P in Group 1 of the Periodic Table are burnt in the separate gas jar containing chlorine gas.

Metal Logam


L Burns slowly Terbakar dengan perlahan

M Burns very vigorously Terbakar dengan sangat cergas

P Burns vigorously Terbakar dengan cergas

Table 3 Jadual 3 What is the correct arrangement in decreasing proton number of the elements in the Periodic Table? Apakah susunan yang betul mengikut pengurangan nombor proton unsur-unsur itu dalam Jadual Berkala?

A L, P, M B M, L, P C P, M, L D M, P, L


SULIT 25 4541/1


42 The equation represents a reaction between dilute hydrochloric acid and magnesium.

Persamaan mewakili tindak balas antara asid hidroklorik cair dengan magnesium. p HCl + q Mg r MgCl2 + H2 What are the values of p, q and r in the balanced chemical equation? Apakah nilai bagi p, q dan r dalam persamaan kimia yang seimbang?

A p = 1, q = 1, r = 1 B p = 1, q = 1, r = 2 C p = 2, q = 1, r = 2 D p = 2, q = 1, r = 1 43 50.0 cm3 of 0.4 mol dm-3 sodium hydroxide solution, NaOH, is titrated with

1.0 mol dm-3 sulphuric acid, H2SO4. What is the volume of sulphuric acid needed to neutralize the sodium hydroxide solution? 50.0 cm3 larutan natrium hidroksida, NaOH 0.4 mol dm-3 telah dititratkan dengan asid sulfurik, H2SO4 1.0 mol dm-3 . Berapakah isipadu asid sulfurik yang diperlukan untuk meneutralkan larutan natrium hidroksida itu? A 10.0 cm3

B 20.0 cm3 C 40.0 cm3 D 50.0 cm3


SULIT 26 4541/1


44 Table 4 shows the proton number of elements magnesium and oxygen Jadual 4 menunjukkan nombor proton bagi unsur-unsur magnesium dan oksigen.

Element Unsur

Proton number Nombor proton

Magnesium Oxygen

12 8

Table 4 Jadual 4 Which of the following represents the electron arrangement of the compound formed when magnesium reacts with oxygen? Antara berikut yang manakah mewakili susunan elektron bagi sebatian yang terbentuk apabila unsur magnesium bertindak balas dengan oksigen?

A

B

C

D

Mg O

2+ 2-

Mg O

2-

Mg O O

2+ 2-

x

x Mgg

O O


SULIT 27 4541/1


45 Table 5 shows the results of displacement reaction of metals to construct the electrochemical series. Jadual 5 menunjukkan keputusan bagi tindak balas penyesaran logam untuk membina siri eletrokimia. Solution Metal

W nitrate X nitrate Y nitrate Z nitrate

W X is displaced Y is displaced No change

X No change Y is displaced No change

Y No change No change No change

Z W is displaced X is displaced Y is displaced

Table 5 Jadual5 Which of the following is the correct ascending order of these metals in the electrochemical series? Antara berikut yang manakah kedudukan susunan secara menaik bagi logam-logam ini dalam siri elektrokimia?

A X, W, Y, Z B W, Y, X, Z C Y, X, W, Z D Z, W, X, Y

46 Calcium carbonate reacts with acid to produce a salt, carbon dioxide and water. Which acid will produce the highest rate of reaction? Kalsium karbonat bertindak balas dengan asid untuk menghasilkan satu garam, karbon dioksida dan air. Asid manakah akan menghasilkan kadar tindak balas paling tinggi?

A 20 cm3 of 0.1 mol dm-3 hydrochloric acid 20 cm3 asid hidroklorik 0.1 mol dm-3

B 20 cm3 0.1 mol dm-3 sulphuric acid acid 20 cm3 asid sulfurik 0.1 mol dm-3

C 50 cm3 0.1 mol dm-3 ethanoic acid acid 50 cm3 asid etanoik 0.1 mol dm-3

D 50 cm3 of 0.1 mol dm-3 nitric acid 50 cm3 asid nitrik 0.1 mol dm-3


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47 Diagram 16 shows the set-up of apparatus to investigate the effect of heating on a salt. Rajah 16 menunjukkan susunan radas untuk mengkaji kesan haba ke atas satu garam. Diagram 16 Rajah 16 Which of the following is true about the salt? Antara berikut yang manakah benar tentang garam itu?

I Nitrogen dioxide gas is liberated Gas nitrogen dioksida terbebas

II Carbon dioxide gas is liberated Gas karbon dioksida terbebas

III Lead(II) oxide is formed Plumbum(II) oksida terhasil

IV The black residue is formed Baki berwarna hitam terbentuk

A I and III only I dan III sahaja

B I and IV only I dan IV sahaja

C II and III only II dan III sahaja

D II and IV only II dan IV sahaja

Lime water Air kapur

Lead(II) carbonate Plumbum(II) oksida

Heat Panaskan


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48 The chemical equation represents a reaction between chlorine gas and heated iron wool Persamaan mewakili satu tindak balas antara gas klorin dengan wul besi panas. 3Cl2 + 2Fe 2FeCl3 What is the mass of iron(III) chloride formed when 120 cm3 chlorine gas reacted with heated iron wool? [Relative atomic mass: Cl= 35.5 , Fe = 56, Molar volume of gas at room temperature = 24 dm3 mol-1 ] Berapakah jisim ferum(III) klorida yang terbentuk apabila 120 cm3 gas klorin bertindakbalas dengan wul besi panas? [Jisim atom relatif:, Cl = 35.5, Fe = 56 , Isipadu molar gas pada suhu bilik = 24 dm3 mol-1 ]

A 0.305g B 0.542g C 0.580g D 0.813g 49 Which chemical equation represents a redox reaction?

Persamaan kimia manakah mewakili satu tindak balas redoks?

A Ba(NO3)2 + Na2SO4 BaSO4 + 2NaNO3

B H2SO4 + 2NaOH Na2SO4 + 2H2O

C Cl2 + NaOH NaOCl + HCl

D Cl2 + H2S S + 2HCl


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50 Diagram 17 shows a process of producing a compound Z.

Rajah17 menunjukkan satu proses untuk menghasilkan satu sebatian Z. Diagram 17 Rajah 17 What is the name of compound Z? Apakah nama sebatian Z?

A

Ethyl ethanoate Etil etanoat

B Ethyl propanoate Etil propanoat

C Propyl ethanoate Propil etanoat

D Propyl propanoate Propil propanoat

END OF QUESTION PAPER

Propene Propena

Ethanol Etanol

Hydration Penghidratan

Compound Z Sebatian Z

Compound Y Sebatian Y

Compound X Sebatian X

Oxidation Pengoksidaan


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INFORMATION FOR CANDIDATES

MATLUMAT UNTUK CALON

1. This question paper consists of 50 questions.

Kertas soalan ini mengandungi 50 soalan.

2. Answer all questions.

Jawab semua soalan.

3. Each question is followed by four alternative answers, A, B, C and D. For each question, choose one answer only. Blacken your answer on the objective answer sheet provided.

Tiap-tiap soalan diikuti oleh empat pilihan jawapan, iaitu A, B, C dan D. Bagi setiap soalan, pilih satu jawapan sahaja. Hitamkan jawapan anda pada kertas jawapan objektif yang disediakan.

4. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the space for the new answer. Jika anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan jawapan yang baru.

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

Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan.

6. You may use a scientific calculator.

Anda dibenarkan menggunakan kalkulator saintifik.


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4541/2 © 2012 Hakcipta BPSBPSK [Lihat sebelah

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

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4541/2

Chemistry

Kertas 2

Ogos

2012

2 ½ jam BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH

DAN SEKOLAH KECEMERLANGAN




CHEMISTRY Kertas 2

Dua jam tiga puluh minit


1. Tuliskan nama dan tingkatan pada ruang yang

disediakan. 2. Jawab semua soalan daripada Bahagian A.

Tuliskan jawapan anda dalam ruang yang disediakan

3. Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Jawapan kepada Bahagian B dan Bahagian C hendaklah ditulis pada kertas tulis.

4. Anda diminta menjawab dengan lebih terperinci untuk Bahagian B dan Bahagian C. Jawapan mestilah jelas dan logik. Persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda boleh digunakan.

5. Anda hendaklah menyerahkan kertas tulis dan kertas tambahan, jika digunakan bersama-sama dengan kertas soalan.

6. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan adalah dibenarkan.

Kertas soalan ini mengandungi 28 halaman bercetak

Untuk Kegunaan Pemeriksa Bahagian Soalan Markah

penuh Markah diperoleh

A

1 9

2 9 3 10 4 10 5 11 6 11

B 7 20 8 20

C

9 20 10 20

Jumlah


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2

Section A

Bahagian A

[60 marks] [60 markah]

Answer all questions.

Jawab semua soalan dalam bahagian ini.

1 Diagram 1 shows the formula of two type of cleaning agents soap and detergent. Rajah 1 menunjukkan formula bagi dua jenis agen pencuci sabun dan detergen.

Diagram 1.1 Rajah 1.1

(a) State the type of cleaning agent:

Nyatakan jenis agen pencuci: A: ……………………………………………………………………………………... B: ……………………………………………………………………………………...


(b) “Soaps form scum while detergents do not form scum with hard water. Thus the

cleansing action of detergent is more effective than soap in hard water”. “Sabun membentuk kekat manakala detergen tidak membentuk kekat dalam air liat. Oleh itu tindakan pencucian detergen lebih berkesan daripada sabun dalam air liat”. (i) Name one ion in hard water that causes the formation of scum. Namakan satu ion dalam air liat yang menyebabkan pembentukan kekat. …………………………………………………………………………………..

[1 mark] [1 markah]

(ii) State one advantage of soap compared to detergent toward environment. Nyatakan satu kelebihan sabun berbanding dengan detergen terhadap alam sekitar ………………………………………………………………….……………….

[1 mark] [1 markah]

CH3(CH2)11OSO3- Na

+

CH3(CH2)16COO- Na

+

Cleaning Agent A Agen pencuci A

Cleaning Agent B Agen pencuci B


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(c) Table 1 shows the function of two types of medicine. Jadual 1 menunjukkan fungsi dua jenis ubat.

Function

Fungsi

Type of medicine

Jenis ubat

Relieve pain Mengurangkan kesakitan

Changes the emotions and behavior of the patient. Mengubah emosi dan perlakuan pesakit.

Table 1.2 Jadual 1.2

Complete Table 1.2 by writing the type of medicine in the space provided. Lengkapkan Jadual 1.2 dengan menulis jenis ubat di dalam ruang yang disediakan.


(d) Diagram 1.3 shows the label on the box of banana cake. Rajah 1.3 menunjukkan label pada kotak yang berisi kek pisang.


(i) One of the ingredients in the food is not suitable for a diabetic patient.

State the ingredient and suggest another food additive that give the same sweetness but has low calories content.

Satu daripada bahan dalam makanan tersebut tidak sesuai bagi pesakit diabatik. Nyatakan bahan tersebut dan cadangkan satu bahan tambah makanan lain yang dapat memberikan kemanisan yang sama tetapi mempunyai kandungan kalori yang lebih rendah. ........…………………………………………………………………………………. ........………………………………………………………………………………….


Banana Cake

Kek Pisang

Ingredients:

Bahan-bahan:

Wheat flour, egg, margarine, sugar, penthyl ethanoate, ascorbic acid,

‘Sunset Yellow’. Kandungan: tepung gandum, telur, margerin, gula, pentil etanoat, asid

askorbik, ‘Sunset Yellow’.


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4

(ii) State the function of ‘Sunset Yellow’. Nyatakan fungsi ‘Sunset Yellow’. ......…………………………………………………………………………………..

[1 mark] [1 markah] 2 Diagram 2.1 shows part of the Periodic Table of the Elements.

Na, Mg, Cl and Ar represent the actual symbol of the elements. Rajah 2.1 menunjukkan sebahagian daripada Jadual Berkala Unsur. Na, Mg, Cl dan Ar mewakili simbol sebenar unsur.


Based on Diagram 2.1: Berdasarkan Rajah 2.1:

(a) (i) Name the element which is located in Group 2 and Period 3. Namakan unsur yang terletak dalam Kumpulan 2 dan Kala Ke-3.

....................................................................................................................................

[1 mark] [1 markah]

(ii) Explain why the element in (a)(i) is located in Period 3. Terangkan mengapa unsur dalam (a)(i) terletak dalam Kala Ke-3.

.....................................................................................................................................

[1 mark] [1 markah]

(b) Chlorine atom is smaller than magnesium atom. Explain why. Atom klorin lebih kecil daripada atom magnesium. Terangkan mengapa.

.......................................................................................................................................... .......................................................................................................................................... ..........................................................................................................................................


Na Mg Cl Ar


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(c) State one use of argon in daily life. Nyatakan satu kegunaan argon dalam kehidupan seharian.

.......................................................................................................................................... [1 mark] [1 mark]

(d) Name the element which exists as monoatomic gas. Namakan unsur yang wujud sebagai gas monoatom. ..........................................................................................................................................

[1 mark] [1 markah]

(e) Chlorine, Cl2 gas reacts with hot iron wool to produce a brown solid. Gas klorin, Cl2 bertindak balas dengan wul besi panas untuk menghasilkan pepejal perang. (i) Complete the chemical equation below.

Lengkapkan persamaan di bawah. ____ Cl2 (g) + ____ Fe (s) ____ FeCl3(s)

[1 mark] [1 markah]

(ii) Based on the chemical equation in (e)(i), calculate the maximum mass of iron

(III) chloride formed when 0.05 mol of iron is used in the reaction. [Relative atomic mass: Fe = 56 ; Cl = 35] Berdasarkan persamaan kimia pada (e)(i), hitungkan jisim maksimum ferum(III) klorida yang terbentuk apabila 0.05 mol ferum digunakan dalam tindak balas. [Jisim atom relatif : Fe = 56 ; Cl = 35]

[1 mark] [1 mark]


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6

(iii) Diagram 2.2 shows the apparatus set-up for three different experiments. Mark (√ ) in the box which shows the correct apparatus set-up for the reaction between chlorine gas, Cl2 and hot iron wool. Rajah 2.2 menunjukkan susunan radas untuk tiga eksperimen berbeza. Tanda (√ ) dalam petak yang menunjukkan susunan radas yang betul bagi tindak balas antara gas klorin, Cl2 dengan wul besi panas.


[1 mark] [1 markah]

Chlorine gas Gas klorin

Hot iron wool Wul besi panas Heat

Panaskan

Hot iron wool Wul besi panas Heat

Panaskan



Hot iron wool Wul besi panas

Heat Panaskan


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3 (a) Diagram 3.1 shows the standard representation of carbon-14 atom. Rajah 3.1 menunjukkan perwakilan piawai bagi atom karbon-14.


(i) State the proton number of carbon-14 atom. Nyatakan nombor proton bagi atom karbon-14. .......................…………………………………………………………...………

[1 mark] [1 markah]

(ii) State one use of carbon-14. Nyatakan satu kegunaan karbon-14.

...………………………………………………………………………………...

[1 mark] [1 markah]

(iii) Carbon has three isotopes. State another isotope other than carbon-14.

Karbon mempunyai tiga isotop. Nyatakan satu lagi isotop selain daripada karbon-14.

...………………………………………………………………………………... [1 mark]

[1 markah]

(iv) Determine the number of neutrons for the isotope in (a)(iii). Tentukan bilangan neutron bagi isotop dalam (a)(iii).

...………………………………………………………………………………... [1 mark]

[1 markah]

C146


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(b) Hydrogen reacts with chlorine to form compound A whereas potassium reacts

with chlorine to form compound B. Diagram 3.2 shows the electron arrangement of compound A and compound B. Hidrogen bertindak balas dengan klorin untuk membentuk sebatian A manakala kalium bertindak balas dengan klorin untuk membentuk sebatian B. Rajah 3.2 menunjukkan susunan elektron bagi sebatian A dan sebatian B.

Compound A Compound B Sebatian A Sebatian B


(i) State the type of compounds.

Nyatakan jenis sebatian tersebut. A: ……………………………………………………………………………….. B: ………………………………………………………………………………..


(ii) Write the electron arrangement of atom K

Tuliskan susunan elektron bagi atom K. …………………………………………………………………………………...

[1 mark] [1 markah]

(iii) State one physical property of compound B. Nyatakan satu sifat fizik bagi sebatian B. ....………………………………………………………………………………...

[1 mark] [1 markah]

(iv) Write a balance chemical equation to represent the formation of compound B.

Tuliskan satu persamaan kimia yang seimbang untuk mewakili pembentukan sebatian B. ………………………………………………………………………………...…


H Cl Cl K

+ -


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4 Diagram 4.1 shows the apparatus used in the titration process between an aqueous potassium hydroxide solution and dilute sulphuric acid using indicator A. Rajah 4.1 menunjukkan proses pentitratan antara larutan akueus kalium hidroksida dengan asid sulfurik cair dengan menggunakan penunjuk A.

Diagram 4.1

Rajah 4.1

(a) Name Namakan: (i) Apparatus P

Radas P : ....................................................................................................

(ii) Indicator A

Penunjuk A : .................................................................................................... [2 marks]

[2 markah]

(iii) Based on answer in (a)(ii), state the colour change of the solution in conical flask at the end point. Berdasarkan jawapan di (a)(ii), nyatakan perubahan warna larutan dalam kelalang kon pada takat akhir.

..............................................................................................................................

[1 mark] [1 markah]

25.0 cm3 of 1.0 mol dm-3 potassium hydroxide solution 25.0 cm3 larutan kalium hidroksida 1.0 mol dm-3

25.0 cm3 of 1.0 mol dm-3 potassium hydroxide solution + indicator A 25.0 cm3 larutan kalium hidroksida 1.0 mol dm-3 + penunjuk A.

Apparatus P Radas P Dilute sulphuric acid

Asid sulfurik cair


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(b) (i) Write a balanced chemical equation for the reaction between potassium hydroxide solution with sulphuric acid.

Tulis persamaan kimia yang seimbang bagi tindak balas antara larutan kalium hidrosida dengan asid sulfurik. ..............................................................................................................................


(ii) In this experiment, 10.00 cm3 of dilute sulphuric acid was needed to neutralise

completely 25.0 cm3 of 1.0 mol dm-3 potassium hydroxide solution. Calculate the molarity of the dilute sulphuric acid. Dalam eksperimen ini, 10.00 cm3 asid sulfurik cair diperlukan untuk meneutralkan dengan lengkap 25.0 cm3 larutan kalium hidroksida 1.0 mol dm-3. Hitung kemolaran asid sulfurik cair.

[2 marks]

[2 markah]


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(c) Table 4.2 shows ethanoic acid, CH3COOH in three different states and the observations that obtained when tested with moist blue litmus paper. Jadual 4.2 menunjukkan asid etanoik yang berada dalam tiga keadaan berbeza dan pemerhatian yang diperolehi apabila diuji dengan kertas litmus biru lembab. Experiment

Eksperimen

State of ethanoic acid

Keadaan asid etanoik

Observation on blue

litmus paper

Pemerhatian pada kertas

litmus biru

I Glacial ethanoic acid Asid etanoik glasial

No change Tiada perubahan

II Ethanoic acid in water Asid etanoik dalam air

Blue to red Biru kepada merah

III Ethanoic acid in dry propanone, Asid etanoik dalam propanon kontang



(i) Name the ion which is responsible for changing the colour of blue litmus

paper to red. Namakan ion yang menyebabkan perubahan pada warna kertas litmus biru kepada merah.

..............................................................................................................................

[1 mark] [1 markah]

(ii) Explain why there is no change on blue litmus paper in Experiment III.

Terangkan mengapa tiada perubahan pada kertas litmus biru dalam Eksperimen III. ..............................................................................................................................

..............................................................................................................................

..............................................................................................................................



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5 (a) What is the meaning of empirical formula? Apakah maksud formula empirik? …………………………………………………………………………………………

[1 mark] [1 markah]

(b) Table 5.1 shows the result for an experiment to determine the empirical formula of

magnesium oxode. Jadual 5.1 menunjukkan keputusan bagi satu ekperimen untuk menentukan formula empirik bagi magnesium oksida.

Description Penerangan

Mass, g Jisim,g

Mass of crucible + lid Jisim mangkuk pijar + penutup

35.4

Mass of crucible + lid + magnesium ribbon Jisim mangkuk pijar + penutup + pita magnesium

37.8

Mass of crucible + lid + magnesium oxide Jisim mangkuk pijar + penutup + magnesium oksida

39.4


(i) Base on table, calculate the mass of

Berdasarkan jadual, hitungkan jsim bagi Magnesium : Magnesium

Oxygen :

Oksigen [1 mark]

[1 markah]

(ii) Calculate the mole ratio of magnesium atoms to oxygen atoms. Hitungkan nisbah mol bagi atom magnesium kepada atom oksigen. [Relative atomic mass: O = 16, Mg = 24] [Jisim Atom Relatif: O = 16, Mg = 24]



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(v) Determine the empirical formula of magnesium oxide. Hitungkan formula empirik magnesium oksida. …………………………………………………………………………………..

[1 mark] [1 markah]

(vi) When carrying out the experiment, why does the crucible lid need to be

opened once in a while? Semasa menjalankan eksperimen ini, mengapakah penutup mangkuk pijar dibuka sekali sekala. ………………………………………………………………………………….. …………………………………………………………………………………..

[1 mark] [1 markah]

(vii) How to ensure all magnesium has completely reacted?

Bagaimana untuk memastikan semua magnesium bertindakbalas dengan lengkap?

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

[1 mark] [1 markah]

(c) Draw an apparatus set-up to carry out this experiment.

Lukis susunan radas untuk menjalankan eksperimen ini.

[2marks] [2 markah]


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(d) (i) State the name of another metal oxide whose empirical formula can be determined using the same technique. Nyatakan nama suatu logam oksida lain yang formula empiriknya boleh ditentukan menggunakan teknik ini. …………………………………………………………………………………..

[1 mark] [1 markah]

(ii) State why the empirical formula of silver oxide cannot be determine by using the same technique. Nyatakan mengapa formula empirik bagi argentum oksida tidak dapat ditentukan dengan menggunakan teknik yang sama. ………………………………………………………………………………….. …………………………………………………………………………………..

[1 mark] [1 markah]

6 Diagram 6.1 shows the conversion of but-2-ene to hydrocarbon Y through Process X at

180oC with the presence of nickel as a catalyst.

Rajah 6.1 menunjukkan pertukaran but-2-ena kepada hidrokarbon Y melalui Proses X pada 180oC dengan kehadiran nikel sebagai mangkin. Diagram 6.1

Rajah 6.1

(a) Name process X.

Namakan proses X.

.............…………………………………………………………...…………………….. [1 mark]

[1 markah]

Process X Proses X

180oC/ Nickel

But-2-ene But-2-ena

Y


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(b) Write the chemical equation to represent process X. Tuliskan persamaan kimia untuk mewakili proses X..

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

[1 mark] [1 markah]

(c) 28 g of but-2ene is completely burnt in oxygen.

The chemical equation below shows the combustion of but-2-ene. [Relative atomic mass: C=12, O = 16, H = 1; Molar volume of gas= 24 dm3 mol at room condition ] 28 g but-2-ena terbakar dengan lengkap dalam oksigen. Persamaan kimia di bawah menunjukkan pembakaran but-2-ena. [Jisim Atom Relatif: C=12, O = 16, H = 1; Isi padu molar gas = 24 dm3 mol pada keadaan bilik] C4H8 + 6O2 4CO2 + 4 H2O

(i) Calculate the number of moles of but-2-ene burnt. Hitungkan bilangan mol but-2ena yang terbakar.

[1 mark] [1 markah]

(ii) Calculate the volume of carbon dioxide gas produced. Hitungkan isi padu gas karbon dioksida yang terhasil.



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(d) Describe a chemical test to differentiate but-2-ene and hydrocarbon Y.

Terangkan satu ujian kimia bagi membezakan but-2-ena dan hidrokarbon Y.

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


(e) Diagram 6.2 below shows two types of rubbers, Rubber Type A and Rubber Type B.

Rajah 6.2 di bawah menunjukkan dua jenis getah. Jenis Getah A dan Jenis Getah B.


Rubber Type A Jenis Getah A

Rubber Type B Jenis Getah B


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(i) Identify the type of rubbers A and B. Kenalpasti jenis getah A dan B. A: ………………………………………………………………………………. B: ……………………………………………………………………………….


(ii) Compare the elasticity of rubber type A and rubber type B.

Bandingkan keelastikan getah jenis A dengan getah jenis B.

………………………………………………………………………………… [1 mark]

[1 markah]


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Section B

Bahagian B


Answer any one question.

Jawab mana-mana satu soalan daripada bahagian ini.

7 (a) Table 7.1 shows a series of experiment carried out to construct the electrochemical series. The positive terminal and value for potential difference for the pair of metals X and copper, Cu are not given. W, X and Y are not the actual symbols of the metals. Jadual 7.1 menunjukkan keputusan satu siri eksperimen yang dijalankan untuk membina siri elektrokimia. Terminal positif dan nilai beza keupayaan logam X dan kuprum, Cu tidak diberi. W,X dan Y bukan simbol sebenar logam-logam itu.

Pair of metals

Pasangan logam

Positive terminal

Terminal positif

Potential difference (V)

Beza keupayaan (V)

W, X X 1.6

X, Y Y 0.4

W, Cu Cu 2.9

X, Cu

Table 7.1

Jadual 7.1

(i) Based on the values of the potential differences, arrange the metals in ascending order in the electrochemical series.

Berdasarkan nilai beza keupayaan, susun logam-logam tersebut dalam tertib menurun dalam siri elektrokimia.

[1mark] [1 markah]

(ii) Predict the positive terminal and the value of potential difference for the pair of metals X and Cu. Explain your answer.

Ramal terminal positif dan nilai beza keupayaan untuk pasangan logam X dan Cu. Terangkan jawapan anda.

[3marks]

[3 markah]


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(b ) Diagrams 7.3 and 7.4 show the apparatus set-up used in two experiments to electrolyse molten lead(II) chloride and 0.0001 mol dm-3 hydrochloric acid. Rajah 7.3 dan 7.4 menunjukkan susunan radas yang digunakan dalam dua eksperimen untuk menjalankan elektrolisis ke atas leburan plumbum(II) klorida dan asid hidroklorik 0.0001 mol dm-3 .

Experiment

Eksperimen

Diagram

Rajah

I

Diagram 7.3

Rajah 7.3

II

Diagram 7.4

Rajah 7.4



Lead(II) chloride Plumbum(II) klorida

0.0001 mol dm-3 of hydrochloric acid Asid hidroklorik 0. 0001 mol dm-3

HeatHaba

Test tube Tabung uji


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(i) Write the formulae of all ions present in both electrolytes in Experiment I and Experiment II. Tuliskan semua formula ion yang hadir dalam kedua-dua elektrolit pada Eksperimen II dan Eksperimen II


(ii) Different products are formed at electrodes in both experiments. State the products formed at the anode of Experiment I and Experiment II. Explain how the products are formed and state the reason Write the half equations at the anodes

Hasil tindak balas yang berbeza terbentuk di elektrod pada kedua-dua ekperimen ini. Nyatakan hasil yang terbentuk di anod pada Eksperimen I dan Eksperimen II. Terangkan bagaimana hasil ini terbentuk dan berikan sebab Tuliskan setengah persamaan di anod

[10 marks]

[10 markah]

( c ) Diagram 7.2 shows a voltaic cell. Metal R is situated below copper in the electrochemical series. Rajah 7.2 menunjukkan suatu sel voltan. Logam R terletak di bawah kuprum dalam siri elektrokimia.

Diagram 7.2

Rajah 7.2

State the positive terminal and negative terminal of this cell. Suggest a metal that is suitable as metal R and a solution that is suitable as solution R. Nyatakan terminal positif dan terminal negatif bagi sel ini. Cadangkan logam yang sesuai bagi R dan larutan yang sesuai untuk larutan R.


Copper Kuprum

Metal R Logam R

Copper(II) nitrate Kuprum(II) nitrat

Solution R Larutan R


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8 (a) The smaller-sized potatoes will cook faster than the bigger-sized ones. Explain why. Kentang bersaiz kecil masak lebih cepat daripada bersaiz besar. Terangkan mengapa.


(b) A group of students carried out two experiments to investigate the factor affecting the rate of reaction between zinc powder and hydrochloric acid, HCl. Diagram 8 shows the set-up of apparatus used in the experiments.

Sekumpulan pelajar menjalankan dua eksperimen untuk mengkaji faktor yang mempengaruhi kadar tindak balas antara serbuk zink dengan asid hidroklorik, HCl. Rajah 8 menunjukkan susunan radas yang digunakan dalam kedua-dua eksperimen itu.

Diagram 1

Rajah 1

Experiment

Eksperimen

Apparatus set-up

Susunan radas

Volume of hydrogen gas

released in the first 2 minutes

Isi padu gas terbebas dalam

masa 2 minit pertama

I

II

100 cm3 of 0.1 mol dm-3 HCl

Zinc powder + substance X Serbuk zink + bahan X

100 cm3 of 0.1 mol dm-3 HCl

Zinc powder Serbuk zink

40 cm3 of gas 40 cm3 gas

60 cm3 of gas 60 cm3 gas


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(i) In the presence of substance X in Experiment II, the higher volume of gas is released in the first 2 minutes compared to Experiment I. State one substance that can be used as substance X. Dengan kehadiran bahan X dalam Eksperimen II, isi padu gas yang terbebas dalam dua minit pertama adalah lebih tinggi. Nyatakan satu bahan yang boleh digunakan sebagai bahan X.

[1 mark] [1 markah]

(ii) Calculate the average rate of reaction in Experiment I and Experiment II in the first 2 minutes. Hitung kadar tindak balas purata bagi Eksperimen I dan Eksperimen II dalam masa 2 minit pertama .


(iii) Compare the rate of reaction between Experiment I and Experiment II. Explain your answer based on collision theory. Banding kadar tindak balas antara Eksperimen I dan Eksperimen II. Jelaskan jawapan anda berdasarkan kepada teori perlanggaran.


(iv) Sketch a graph of volume of the gas released against time for both sets of experiments in the first 2 minutes. Lakar graf isi padu gas terbebas melawan masa bagi kedua-dua set eksperimen dalam masa 2 minit pertama.


(v) Write an ionic equation for the reaction between zinc powder and hydrochloric acid. Tulis persamaan ion bagi tindak balas antara serbuk zink dan asid hidroklorik.

[2marks] [2 markah]

(vi) Hydrochloric acid in Experiment I is replaced with sulphuric acid with the same volume and concentration. Compare the rate of reaction and the maximum volume of hydrogen gas released between these two experiments. Explain your answer.

Asid hidroklorik dalam Eksperimen I digantikan dengan asid sulfurik yang mempunyai isi padu dan kepekatan yang sama. Bandingkan kadar tindak balas dan isi padu maksimum gas hidrogen yang terbebas antara kedua-dua eksperimen ini. Terangkan jawapan anda.



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Section C

Bahagian C


Answer any one question.

Jawab mana-mana satu soalan daripada bahagian ini.

9 (a) The chemical equation below shows a redox reaction. Persamaan kimia berikut menunjukkan tindak balas redoks. Mg (s) + CuSO4(aq) Cu(s) + MgSO4(aq)

Mg (p) + CuSO4(ak) Cu(p) + MgSO4(ak)

Explain the redox reaction in terms of change in oxidation number. Terangkan tindak balas redoks yang berlaku dari aspek perubahan nombor pengoksidaan. [4 marks]

[4 markah]

(b) An experiment is carried out to determine the position of metals L, M and copper in the reactivity series. Diagram 9 shows the results of the experiment.

Satu eksperimen dijalankan untuk menentukan kedudukan logam L, logam M dan kuprum dalam siri kereaktifan. Rajah 9 menunjukkan keputusan bagi eksperimen tersebut.

Experiment

Eksperimen

I

L + copper(II) oxide L+ kuprum(II) oksida

II

M + copper(II) oxide M + kuprum(II) oksida

III

M + L oxide M + oksida L

. Observation

Pemerhatian

Black powder turns brown Serbuk hitam menjadi perang

Black powder turns brown Serbuk hitam menjadi perang


Diagram 9 Rajah 9


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24

Based on the results in the experiment, arrange the three metals in order of increasing reactivity toward oxygen. Explain your answer.

Bedasarkan kepada keputusan dalam eksperimen itu, susun tiga logam tersebut mengikut turutan menaik kereaktifan terhadap oksigen. Terangkan jawapan anda.


(c) You are required to investigate the oxidation and reduction in the displacement of halogens from its halide solution. The chemicals provided are;

potassium chloride solution potassium bromide solution potassium iodide solution chlorine water bromine water iodine solution 1,1,1 trichloroethane

Describe a laboratory experiment to compare the ability of halogens as oxidizing agent. In your description include

procedure observation ionic equation

[10 marks]

Anda dikehendaki menyiasat pengoksidaan dan penurunan dalam tindak balas penyesaran halogen daripada larutan halidanya. Bahan-bahan kimia yang dibekalkan ialah;

larutan kalium klorida larutan kalium bromida larutan kalium iodida air klorin air bromin larutan iodin 1,1,1 trikloroetana

Huraikan satu eksperimen makmal untuk membandingkan keupayaan halogen sebagai agen pengoksidaan. Dalam huraian anda, sertakan

prosedur, pemerhatian persamaan ion

[10 markah]


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10 (a) Solution X is added to solution Y to form barium sulphate. State the name of the reaction and the name of solution X and solution Y. Write the ionic equation for the reaction.

Larutan X ditambahkan kepada larutan Y untuk membentuk barium sulfat. Nyatakan nama bagi tindak balas itu dan nama bagi larutan X dan larutan Y. Tulis persamaan ion untuk tindak balas itu.


(b) (i) A student carries out a chemical test to identify the cation and anion in solution Q.

Table 10 shows the result of the chemical test. Seorang pelajar menjalankan ujian kimia untuk mengenalpasti kation dan anion dalam larutan Q. Jadual 10 menunjukkan keputusan ujian kimia itu.

Chemical test

Ujian kimia

Observation

Pemerhatian

2 cm3 of ammonia aqueous is added to the solution Q in a test tube until in excess.

2 cm3 ammonia akueus ditambahkan kepada larutan Q dalam sebuah tabung uji sehingga berlebihan.

A green precipitate is formed. The precipitate is insoluble in excess of ammonia aqueous.

Mendakan hijau terbentuk. Mendakan tidak larut dalam larutan ammonia akueus berlebihan.

2 cm3 of hydrochloric acid is added to the solution Q and follow by 2 cm3 of silver nitrate solution.

2 cm3 asid hidroklorik ditambahkan kepada larutan Q dan diikuti dengan 2 cm3 larutan argentum nitrat.

A white precipitate is formed.

Satu mendakan putih terbentuk..

Table 10

Jadual 10 Based on Table 10, identify the cation and anion in solution Q.

Bedasarkan Jadual 10, kenal pasti kation dan anion dalam larutan Q. [2 marks]

[2 markah]


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26

(ii) Diagram 10 shows a solution in a bottle.

Rajah 10 menunjukkan satu larutan dalam sebuah botol.

Diagram 10 Rajah 10

Describe a chemical test to confirm the anion that present in the solution. Huraikan satu ujian kimia untuk mengesahkan anion yang hadir dalam larutan itu. [4 marks]

[4 markah]

(c) You are required to prepare a dry zinc sulphate salt. The chemicals supplied are: Anda dikehendaki menyediakan garam zink sulfat yang kering. Bahan kimia yang dibekalkan ialah:

Zinc nitrate solution Larutan zink nitrat

Dilute sulphuric acid Asid sulfurik cair

Sodium carbonate solution Larutan natrium karbonat

Describe a laboratory experiment to prepare the salt. In your description, include the chemical equations involved.

Huraikan satu eksperimen makmal untuk menyediakan garam tersebut. Dalam huraian anda, sertakan persamaan yang terlibat.



KERTAS SOALAN TAMAT

Lead(II) nitrate

Plumbum(II) nitrat


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28

INFORMATION FOR CANDIDATES

MAKLUMAT UNTUK CALON

1 This question paper consists of three sections: Sections A, Section B and Section C.

Kertas soalan ini mengandungi tiga bahagian: Bahagian A, Bahagian B dan Bahagian C.

2 Answer all questions in Section A. Write your answers for Section A in the spaces provided in

the question paper.

Jawab semua soalan dalam Bahagian A. Jawapan anda bagi Bahagian A hendaklah ditulis

dalam ruang yang disediakan dalam kertas soalan

3 Answer any one question from Section B and any one question from Section C.

Write your answers for Section B and Section C on the `helaian tambahan’ provided by the

invigilators. You may use equations, diagrams, tables, graphs and other suitable methods to

explain your answers.

Jawab mana-mana satu soalan daripada Bahagian B dan mana-mana satu soalan daripada

Bahagian C. Tulis jawapan anda bagi Bahagian B dan Bahagian C dalam helaian tambahan

yang dibekalkan oleh pengawas peperiksaan. Anda boleh menggunakan persamaan, rajah,

jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

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

Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan

5 Marks allocated for each question or part question are shown in brackets.

Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan

6 Show your working. It may help you to get marks.

Tunjukkan kerja mengira.Ini membantu anda mendapatkan markah.

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

new answer.

Sekiranya anda hendak menukar jawapan, batalkan jawapan yang telah dibuat. Kemudian tulis

jawapan yang baru.

8 The Periodic Table of Elements is provided.

Jadual Berkala Unsur disediakan.

9 You may use a non-programmable scientific calculator.

Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

10 You are advised to spend 90 minutes to answer questions in Section A, 30 minutes for Section B

and 30 minutes for Section C.

Anda dinasihati supaya mengambil masa 90 minit untuk menjawab soalan dalam Bahagian A

ialah 90 minit, 30 minit untuk Bahagian B dan 30 minit untuk Bahagian C.

11 Hand in your answer sheets at the end of the examination.

Serahkan semua kertas jawapan anda di akhir peperiksaan.


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4541/3 © 2012 Hak Cipta BPSBPSK [Lihat halaman sebelah

SULIT

Nama: ……………………………………………. Tingkatan: ………………………….

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH





CHEMISTRY

Kertas 3

1 JAM 30 MINIT


Arahan:

1. Kertas soalan ini adalah dalam dwibahasa. 2. Soalan dalam bahasa Inggeris mendahului soalan

yang sepadan dalam bahasa Melayu. 3. Kertas soalan ini mengandungi 2 soalan struktur

dan 1 soalan esei. 4. Calon dikehendaki membaca maklumat di halaman

belakang kertas soalan ini. 5. Jawab soalan 1 dan 2 di ruangan yang disediakan.

Kertas soalan ini mengandungi 14 halaman bercetak

Untuk Kegunaan Pemeriksa Soalan Markah

Penuh

Markah Diperoleh

1

27

2

6

3

17

Jumlah

50

SULIT

4541/3

CHEMISTRY

Kertas 3

Ogos

2012

1jam 30 minit


Admin

eduQR

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1. Diagram 1.1 shows the apparatus set-up to carry out an experiment to compare the hardness of bronze and its pure metal, copper. Rajah 1.1 menunjukkan gambarajah susunan radas untuk membandingkan kekerasan gangsa dengan logam tulennya, kuprum.

Diagram 1.1

Rajah 1.1

The experiment was carried out according to the following steps: Eksperimen itu dijalankan mengikut langkah-langkah berikut:

Step 1

Langkah 1

Cellophane tape was used to stick a steel ball bearing onto the copper block. Pita selofen digunakan untuk melekatkan bebola keluli di atas bongkah kuprum.

Step 2

Langkah 2

A 1.0 kg weight was hanged at a height of 50 cm above the ball bearing as shown in Diagram 1.1. Pemberat 1.0 kg digantung pada ketinggian 50 cm di atas bebola keluli seperti yang ditunjukkan dalam Rajah 1.1.

Step 3

Langkah 3 The weight was dropped so that it hit the ball bearing. Pemberat itu dijatuhkan ke atas bebola keluli tersebut.

Step 4

Langkah 4

The diameter of dent made on the copper block was measured and the reading was recorded. Diameter lekuk yang terbentuk pada bongkah kuprum diukur dan bacaannya direkodkan.


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Step 5

Langkah 5

Step 1 to step 4 was repeated twice on the other parts of the same copper block to get another dents. Langkah 1 hingga 4 diulang sebanyak dua kali di atas bahagian lain bongkah kuprum untuk mendapatkan lekuk yang lain.

Step 6

Langkah 6

Step 1 to step 5 was repeated by replacing the copper block with the bronze block. Langkah 1 hingga 5 diulang dengan menggantikan bongkah kuprum dengan bongkah gangsa.

Diagram 1.2 shows the shape of dents formed for the experiment. Rajah 1.2 menunjukkan lekuk yang terbentuk bagi eksperimen itu.

Diagram 1.2

Rajah 1.2

Copper block Blok kuprum

Steel ball bearing Bebola keluli


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Table 1.1(a) shows the three dents formed on the copper block. Jadual 1.1(a) menunjukkan tiga lekuk yang terhasil di atas bongkah kuprum.

Sets Set

Diagram of the dents formed Rajah lekuk yang terbentuk.

Diameter of the dent (cm)

Diameter lekuk (cm)

I

...................

II

...................

III

.....................

Table 1.1(a) Jadual 1.1(a)


Ruler Pembaris


Ruler Pembaris


Ruler Pembaris


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Table 1.1(b) shows the three dents formed on the bronze block. Jadual 1.1(b) menunjukkan tiga lekuk yang terhasil di atas bongkah gangsa.

Sets Set

Diagram of the dents formed Rajah lekuk yang terbentuk.

Diameter of the dent (cm)

Diameter lekuk (cm)

I

.....................

II

.....................

III

.....................

Table 1.1 (b) Jadual 1.1(b)

Bronze block Blok gangsa

Ruler Pembaris


Ruler Pembaris


Ruler Pembaris


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(a) By using a ruler given, measure the diameter of dents and record in Table 1.1(a) and 1.1(b). Dengan menggunakan pembaris yang diberikan, ukur diameter lekuk dan catatkan dalam Jadual 1.1(a) dan 1.1(b)


For examiner’s use 1(a)

(b) Construct a table to record the diameters and the average diameter of dents on

copper and bronze blocks. Bina satu jadual untuk merekod diameter lekuk-lekuk dan purata diameter lekuk pada bongkah kuprum dan bongkah gangsa.


1(b)

(c) (i) State one observation that can be obtained from both experiments.

Nyatakan satu pemerhatian yang dapat diperoleh daripada kedua-dua eksperimen ini.

……………………………………………………………………………….

……………………………………………………………………………….

……………………………………………………………………………….


1(c)(i)


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(ii) What is your inference based on your answer in (c)(i). Apakah inferens berdasarkan jawapan anda dalam (c)(i).

………………………………………………………………………………

………………………………………………………………………………

………………………………………………………………………………


For examiner’s use 1(c)(ii)

(iii) The average diameter of dents of bronze block is different from the copper

block due to the arrangement of particles. Explain why. Purata diameter lekuk blok gangsa adalah berbeza dengan blok kuprum disebabkan oleh susunan zarah-zarah. Terangkan mengapa.

……………………………………………………………………………….

……………………………………………………………………………….

……………………………………………………………………………….


1(c)(iii)

(d) For this experiment, state : Bagi eksperimen ini, nyatakan : (i) The manipulated variable Pemboleh ubah dimanipulasikan ………………………………………………………………………………... (ii) The responding variable Pemboleh ubah bergerak balas

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

(iii) The fixed variable Pemboleh ubah dimalarkan

……………………………………………………………………………………


1(d)


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(e) (i) State one hypothesis for this experiment Nyatakan satu hipotesis bagi eksperimen ini.

……………………………………………………………………………….

……………………………………………………………………………….

……………………………………………………………………………….


For examiner’s use 1(e)(i)

(ii) State the operational definition for the hardness of materials in the experiment Nyatakan definisi secara operasi bagi kekerasan bahan dalam eksperimen ini.

……………………………………………………………………………….

……………………………………………………………………………….

……………………………………………………………………………….


1(e)(ii)


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(f) The following is a list of substances: Berikut ialah senarai beberapa bahan:

For examiner’s use

Iron Steel Chromium Besi Keluli Kromium Brass Pewter Tin

Loyang Piuter Timah

Classify these substances into alloy and pure metal. Kelaskan bahan-bahan ini kepada aloi dan logam tulen


1(f)

TOTAL


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2

Diagram 2

Rajah 2 Diagram 2 shows the apparatus set-up for experiment to determine the heat of combustion of methanol. 200 cm3 of water is used in this experiment. The experiment was repeated twice by using ethanol and propanol to replace methanol. Rajah 2 menunjukkan susunan radas bagi eksperimen untuk menentukan haba pembakaran metanol. 200 cm3 air digunakan dalam eksperimen ini. Eksperimen telah diulang sebanyak dua kali dengan menggunakan etanol dan propanol untuk menggantikan metanol.


Graph 2 shows the heat of combustion of alcohols against the number of carbon atom per molecule of alcohols from the experiment. Graf 2 menunjukkan haba pembakaran bagi alkohol melawan bilangan atom karbon per molekul daripada eksperimen itu.


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Graph 2 Graf 2

(a) Based on Graph 2, predict the heat of combustion of butanol.

Berdasarkan Graf 2, ramalkan haba pembakaran butanol. ……………………………………………………………………………………..


2(a)

Number of carbon atom per molecule of alcohols Bilangan atom karbon per molekul alkohol

Heat of combustion/ kJ mol-1 Haba pembakaran/ kJ mol-1

4

500

1000

1500

2000

2500

3000

3500

3 2 1 0



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(b) Table 2 shows the fuel value of alcohols. It also shows the time needed for cooking the same type of food. Jadual 2 menunjukkan nilai bahan api alkohol. Ia juga menunjukkan masa yang diperlukan untuk memasak makanan yang sama.


Alcohols

Alkohol

Fuel value (kJg-1

)

Nilai bahan api (kJg-1

)

Time for cooking

Masa untuk memasak

Methanol 22.75 Slow

Ethanol 29.91 Medium

Propanol 33.60 Fast

Table 2 Jadual 2

State the relationship between the type of alcohols and time needed for cooking. Nyatakan hubungan di antara jenis alkohol dengan masa yang diperlukan untuk memasak.

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


2(b)

TOTAL


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3. Diagram 3 shows one method used to prevent the rusting of iron. Rajah 3 menunjukkan satu kaedah mencegah pengaratan besi.

Diagram 3 Rajah 3

Table 3 shows the observations when iron is in contact with different type of metals for a few days. Jadual 3 menunjukkan pemerhatian apabila besi bersentuhan dengan logam-logam yang berbeza selama beberapa hari.

Metal in contact with iron Logam yang bersentuhan dengan besi


Metal R Logam R

Blue colour is formed Warna biru terbentuk

Metal S Logam S

Pink colour is formed Warna merah jambu terbentuk

Table 3 Jadual 3

Based on above information, plan one experiment to investigate the effect of other metals on the rusting of iron. Berdasarkan maklumat di atas, rancang satu eksperimen untuk mengkaji kesan logam-logam lain ke atas pengaratan besi.

Metal bars

Bar magnesium

Wayar penyambung

Batang paip besi


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Your planning should include the following aspects; Perancangan anda mestilah meliputi aspek-aspek berikut;

(a) Problem statement Pernyataan masalah

(b) All the variables Semua pemboleh ubah

(c) Statement of the hypothesis Pernyataan hipotesis

(d) List of substances and apparatus Senarai bahan-bahan kimia dan alat radas

(e) Procedure for the experiment Prosedur eksperimen

(f) Tabulation of data Penjadualan data

[17 marks]


KERTAS SOALAN TAMAT


Admin

eduQR

1

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH



CHEMISTRY

TRIAL-EXAM

SPM 2012

MARKING SCHEME

PAPER 1

PAPER 2

PAPER 3


2

SKEMA KERTAS 1

PENTAKSIRAN DIAGNOSTIK AKADEMIK

SBP 2012

CHEMISTRY 4541/1

1 A 26 C

2 A 27 D

3 C 28 C

4 A 29 D

5 A 30 B

6 D 31 B

7 B 32 C

8 A 33 A

9 B 34 C

10 A 35 C

11 B 36 D

12 A 37 A

13 D 38 B

14 C 39 B

15 D 40 D

16 A 41 D

17 B 42 D

18 D 43 A

19 C 44 B

20 B 45 C

21 C 46 B

22 D 47 C

23 D 48 B

24 B 49 D

25 A 50 C


3

MARKING SCHEME

CHEMISTRY PAPER 2 SECTION A (4541/2)

Question Mark scheme Sub

Mark

Total

Mark

1(a) A: Detergents

B: Soap

r : sodium salt

1

1

2

1(b)(i) magnesium ion // or calcium ion

r : Mg2+

, Ca2+

1

2 1(b)(ii) Soaps are biodegradable 1

1(c) Analgesics

Psychotherapeutic

r: wrong spelling

1

1

2

1(d)(i) Sugar

Aspartame

1

1

3

1(d)(ii) To add / restore the colour of food // To enhance its visual

appeal / appearance// more attractive

1

TOTAL 9


Mark

Total

Mark

2(a)(i) Magnesium

r:Mg 1

2

2(a)(ii) Has 3 shell occupied with electrons 1

2 (b)

1. Proton number of chlorine is higher than magnesium // the

number of proton of chlorine atom higher than magnesium atom

// total positive charged in nucleus higher than magnesium

2. The attractive force between the nucleus and the electrons in

chlorine atom stronger than magnesium atom // nuclei attraction

towards electrons stronger.

1

1

2

2(c) Light bulb // in welding process 1 1

2 (d) Argon 1 1

2(e)(i)

3 Cl2 (g) + 2 Fe (s) 2 FeCl3(s)

1

1

2(e)(ii) Mass iron (III) chloride = 0.05 x 161 // 8.05 g 1 1


4

2(e)(ii)

1

1

Total 9


Mark

Total

Mark

3(a)(i) 6 1

4

3(a)(ii) To estimate the age of fossils and artifacts 1

3(a)(iii) C-12 // C-13

1

3(a)(iv) 7 / 6 1

3(b)(i) A: covalent

r: covalent bond

B: ionic

r: ionic bond

1

1

6

3(b)(ii) 2.8.8.1 1

3(b)(iii) High melting point and boiling point // conduct electricity in

molten or aqueous solution // soluble in water // insoluble in

organic solvent.

[Any one]

1

3(c)(iv) 2K + Cl2 2KCl

1. Formula of reactants and products correct

2. Balance the chemical equation

1

1

TOTAL 10

13

C 6

12

C 6

Or

Hot iron wool

Wul besi panas

Heat

Panaskan

Chlorine gas

Gas klorin

√


5


Mark

Total

Mark

4(a)(i) Pipette

r: wrong spelling 1

3

4(a)(ii) Phenolphthalein // methyl orange

r: wrong spelling 1

4(a)(iii)

Phenolphthalein : pink to colourless //

methyl orange : yellow to orange

1

4(b)(i)

2KOH + H2 SO4 K2 SO4 + 2H2O

Formula of reactants and products correct

Balance the chemical equation

1

1

2

4(b)(ii)

1. Mol of KOH = (1.0)(25) / 1000

= 0.025 mol

2. Molarity of H2 SO4 = (0.0125)(1000) / 10

= 1.25 mol dm-3

//

Molarity of H2SO4 = 0.0125 /0.01 = 1.25 mol dm-3

Or

b

a

VM

VM

bb

aa ; Molarity of H2SO4 = 10

)25(1

2

1x

= 1.25 mol dm-3

r: wrong unit or without unit

1

1

2

4(c)(i) Hydrogen ion

r: H+ (symbol ion)

1

3 4(c)(ii)

1. no water

2. contain of molecule // no hydrogen ion, H+

1

1

TOTAL 10


6


Mark

Total

Mark

5(a) Chemical formula that shows the simplest whole number ratio of

atom of each element in the compound.

1 1

5(b)(i) Mass of Mg = 2.4 g

Mass of O = 1.6 g

1

6

5(b)(ii) Mole of Mg = 2.4 / 24 = 0.1

Mol of O = 1.6 / 16 = 0.1

Mg : O = 1 : 1

1

1

5(b)(iii) MgO 1

5(b)(iv) to allow oxygen enter the crucible 1

5(b)(v) Repeat the process heating, cooling and weighing until a

constant mass is obtained.

1

5(c)

Apparatus set-up correct and functional

Labeled : magnesium ribbon, heat

1

1

2

5(d)(i) Zinc oxide // aluminium oxide

r: formula

1

2

5(d)(ii) Silver is less reactive / not reactive metal 1

TOTAL 11

Magnesium

ribbon

Heat

crucible


7


Mark

Total

Mark

6(a) Hydrogenation 1

5

6(b) C4H8 + H2 C4H10 1

6(c)(i)

Mole of butene = 2.8 /56 = 0.05 mol

1

6(c)(ii) P1. 1 mol of butene burns in oxygen gas produce 4 mol of

carbon dioxide.

Therefore 0.05 mol of butene burns in oxygen gas produce 0.2

mol of carbon dioxide //

C4H8 : CO2

1 : 4

0.05 : 0.2

P2. volume of CO2 = 0.2 x 24 = 4.8 dm3

1

1

6(d) P1: 2 cm3 of but-2-ene and 2 cm

3 of butane gas are filled in two

different test tubes.

P2 : 2 -3 drops of acidified potassium manganate (VII) solution

is added to both test tubes.

P3: But-2-ene decolourises purple acidified KMnO4

Purple acidified KMnO4 in butane remains unchange.

Or

P1: 2 cm3 of but-2-ene and 2 cm

3 of butane gas are filled in two

different test tubes.

P2 : 2-3 drops of bromine water is added to both test tubes.

P3: But-2-ene decolourises brown bromine water.

Brown bromine water in butane remains unchange.

1

1

1

Or

1

1

1

3

6(e)(i) A: unvulcanised rubber

B: vulcanised rubber

1

1

3

6(e)(ii) Rubber type B/ vulcanised rubber is more elastic than rubber

type A/ unvulcanised rubber

1

TOTAL 11


8

SECTION B

Question Mark scheme Mark Σ

Mark

7 (a)

(i) Ascending order : Cu, Y,X, W

(ii)

P1 : Positive terminal : Cu

P2 : Potential difference : 1.3V

P3: Copper is less electropositive // X is more electropositive

correct value and unit

1

1

1

1

4

7 ( b) (i)

Experiment I : Pb 2+

, Cl-

Experiment II: H +

. OH- , Cl

–

r: lead(II) ion, chloride ion

Hydrogen ion, hydroxide ion, chloride ion

1

1

2

7(b)(ii)

Experiment 1 Experiment II

Product at anode:

Chlorine gas

Products at cathode:

Oxygen gas

Reason:

P1: Cl-

is discharged

P2: the only

anion presence

and discharged at anode

Reason:

P1:OH- is selected to be

discharged

P2:the position of OH- is lower

than Cl- in electrochemical series

.Half equation:

2Cl-

Cl 2 + 2e

P1:Correct formula of

reactant and product :

P2: Balance equation

. Half equation:

4OH- 2 H2O + O2 + 4e

P1: Correct formula of reactant

and product

P2: Balance equation

1 + 1

1 + 1

1 + 1

1 + 1

1 + 1

10


9

7(c)

P1: Positive terminal: R

P2: Negative terminal:Cu

P3: Suitable metal for R : Silver

P4: Suitable solution for R : Silver nitate solution

1

1

1

1

4

Total 20

Question Mark scheme Mark Σ Mark

8(a) P1. Smaller size has larger total surface area.

P2. Absorb heat faster.

P3. Bigger size has smaller total surface area.

P4. Absorb heat slower

1

1

1

1

4

(b)(i) Copper(II) sulphate 1 1

(b)(ii) 1. Experiment I

Rate of reaction = 40/2 = 20 cm3 min

-1

2. Experiment II

Rate of reaction = 60/2 = 30 cm3min

-1

1

1

2

(b)(iii) P1. Rate of reaction in Experiment II is higher than

Experiment I.

P2. Substance X used in Experiment II is a catalyst.

P3. Catalyst provided an alternative path with requires a

lower

activation energy.

P4. More particles are able to achieve lower activation

energy.

P5. Frequency of effective collisions between zinc atoms and

hydrogen ions are higher.

1

1

1

1

1

5


10

(b)(iv) 1. Label of axes and unit

2. Correct curve and label

1

1

2

(v) 1. Correct formula of reactants and product

2. Balanced equation

Zn + 2H+ Zn

2+ + H2

1

1

2

(vi) 1. Rate of reaction using sulphuric acid is higher.

2. Volume of hydrogen gas released is doubled.

3. Sulphuric acid is a diprotic acid.

4. Concentration of hydrogen ions in sulphuric acid is double

than that in hydrochloric acid.

1

1

1

1

4

Total 20

Volume of

gas / cm3

Time / min

Exp II

Exp I

2


11


Mark

9(a) P1: Magnesium atom undergoes oxidation

P2: oxidation number increases from 0 to 2+

P3: Copper (II) ion undergoes reduction

P4: oxidation number decreases from +2 to 0

P5: The reaction involving oxidation and reduction

1

1

1

1

1

MAX

4

(b) Experiment I

L can reduce copper(II) oxide// L can react with copper(II) oxide

L is more reactive than copper.

Experiment II

M can reduce copper(II) oxide//M can react with copper(II)

oxide

M is more reactive than copper.

Experiment III

M cannot reduce L oxide // M cannot react with L oxide.

M is less reactive than L//L is more reactive than M.

The arrangement in order of increasing reactivity toward oxygen is Cu,

M and L.

1

1

1

1

1

1

Max

5

1

6

(c)

Procedure :

P1. Pour 2 cm3 of potassium bromide solution into a test tube.

P2. Add 2 cm3 of chlorine water to the test tube and shake the mixture.

P3. Add 2 cm3 of 1,1,1 trichloroethane to the test tube and shake the

mixture.

P4. Record the observation

P5. Repeat steps 1-4 using another halogens and halide solution.

.

1

1

1

1

1


12

Result :

Chlorine water Bromine water Iodine water

Potassium

chloride

X X

Potassium

bromide X

Potassium

iodide

Ionic equation:

1. Cl2 + 2Br- 2Cl

- + Br2

2. Cl2 + 2I- 2Cl

- + I2

3. Br2 + 2I- 2Br

- + I2

1

1

1

1

1

10

20


13


Mark

10(a)

Precipitation / double decomposition reaction

Barium nitrate solution/barium chloride solution

[Any sulphate solution]

Example: sodium sulphate, potasium sulphate, sulphuric

acid

Reject : Lead(II) sulphate, calcium sulphate

Ba2+

+ SO42 BaSO4

1

1

1

1

4

10(b)(i) Cation : Iron(II) ion / Fe

2+

Anion: Chloride ion / Cl

1

1

2

10(b)(ii)

Test for NO3

P1: Add 2 cm3

of dilute sulphuric acid into the test tube follow

by 2 cm3 of iron(II) sulphate solution.

P2: Add a few drops of concentrated sulphuric acid

P3: carefully and slowly along the side of slanting test tube

into the mixture.

P2: A brown ring is formed.

1

1

1

1

4

10(c)

Procedure:

P1. Add zinc nitrate solution to sodium carbonate solution

in a beaker.

P2. Stir the mixture.

P3. Filter the white precipitate/solid zinc carbonate formed.

P4. Add zinc carbonate to sulphuric acid in a beaker until

some zinc carbonate solid no longer dissolve.

P5. Filter the mixture.

P6. Transfer the filtrate to a evaporating dish.

P7. Heat the filtrate(zinc sulphate solution) until saturated//

Heat the filtrate to about one-third (1/3) of its initial

volume

P8. Allow the saturated solution to cool at room temperature.

P9. Filter the crystals formed.

P10. Dry the crystals by pressing it between two sheets of

filter papers.

1

1

1

1

1

1

1

1

1

1

10

Total 20


1

Marking Scheme Chemistry Paper 3

[KK0503 – Mengukur menggunakan nombor]

[KK0506 – Berkomunikasi]

Question Rubric Score

1(b)

Able to construct the table with correct label and unit

Sample answer:

Type of

blocks

Diameter of dents(cm) Average diameter

of dents (cm) I II III

Copper 1.35 1.60 1.50 1.48

Bronze 1.20 1.00 1.20 1.13

3

Able to construct the table without correct label or unit 2

Able to construct the idea of table 1

No response or wrong response 0

[KK0501 – Memerhati]


1(c) (i)

Able to state the observation correctly and accurately

Sample answer:

The average diameter of dents on bronze block is 1.13 cm, the

average diameter of dents on copper block is 1.48 cm.//

The size / diameter of dents on bronze block is smaller than the size

/ diameter of dents on copper block//

The size / diameter of dents on copper block is bigger than the size /

diameter of dents on bronze block

3

Able to state the incomplete observation

Sample answer:

Able to state the average diameter of one block only.

The size / diameter of dents on bronze block is smaller//

The size / diameter of dents on copper block is bigger.

2

Able to state the idea of observation

Sample answer :

The size / diameter of dents on bronze block is small/

The size / diameter of dents on copper block is big.

1



1(a)

Able to measure the diameter of dents correctly and accurately

Sample answer:

Copper: 1.35, 1.60, 1.50

Bronze: 1.20, 1.00, 1.20

3

Able to measure the diameter of dents without 2 decimal point 2

Able to state 4 diameter of dents correctly 1



2

[KK 0504 – Membuat Inferens]


1(c)(ii)

Able to state the inference correctly and accurately

Sample answer:

Bronze is harder than copper //

Copper is less harder than bronze

3

Able to state the incomplete inference correctly

Sample answer :

Bronze is harder //

Copper is less harder

2

Able to state the idea of inference

Sample answer :

Bronze is hard//

Copper is soft

1


[KK0508 – Mentafsir data]


1(c)(iii)

Able to explain the arrangement of particles in the materials

correctly

Sample answer:

1. The atomic size of tin is bigger than copper// The atomic size of

tin and copper are different

2. The presence of tin atoms in bronze disrupts the orderly

arrangement of copper atoms

3. Reduces/ Prevent the layers of atoms from sliding over each

other/ easily.

3

Able to state any 2 points // 3 points without the name of atoms

correctly

2

Able to state point 1 point correctly 1


[KK0510 – Mengawal pemboleh ubah]


1(d)

Able to state all the variables

Sample answer:

Manipulated variable : Type of materials / blocks//

Copper and bronze

Responding variable : Size / diameter of dents

Fixed variable : Size / diameter and mass of steel ball bearing //

height of the weight // mass of the weight

3

Able to state two variables correctly 2

Able to state one variable correctly 1



3

[KK0511 – Membuat hipotesis]


1(e)(i)

Able to state the hypothesis correctly

Sample answer:

Bronze is harder than copper //

Copper is less harder than bronze

3

Able to state the hypothesis less correctly 2

Able to state idea of hypothesis 1


[KK0509 – Mendefinisikan secara operasi]


1(e)(ii)

Able to state the operational definition correctly

Sample answer:

The smaller dent produced when a 1 kg weight is dropped on the

block.

3

Able to state the operational definition less correctly The smaller dent produced when a weight is dropped on the block//

When a weight is dropped on the block results smaller dent, thus the

harder the block is.

2

Able to state idea of operational definition The harder block has a smaller dent.

1


[KK0502 – Mengelas]


1(e)(ii)

Able to classify all substances correctly

Sample answer:

Alloy Pure metal

Steel

Brass

Pewter

Iron

Chromium

Tin

3

Able to classify at least 4 substances less correctly

Sample answer:

Alloy Pure metal

Steel

Brass

Tin

Iron

Chromium

Pewter

2

Able to state idea of classification (at least 2 correct)

Sample answer :

Alloy Pure metal

Iron

Chromium

Pewter

Steel

Brass

Tin

1



4

[KK0505 – Meramal]


2(a)

1. Able to show an extrapolation on the graph .

Sample answer:

2. Range of answer[ 2600 - 2700 ]

3. Show the negative sign and correct unit, kJmol-1

3

Able to state any two correct answers

2

Able to state any one correct answer

1


[KK0507 – Menggunakan perhubungan ruang dan masa]


2(b)

Able to state the relationship between the number of carbon atom

per molecule and the time taken for cooking correctly

Sample answer

The higher the number of carbon atom per molecule alcohol, the

shorter the time taken for cooking

3

Able to state the relationship between the number of carbon atom

per molecule and the time taken for cooking less correctly

Sample answer

The higher the number of carbon atom, the shorter the time taken

for cooking

2

Able to give relevant idea 1


Number of carbon atom per molecule of alcohols

Heat of combustion/ kJ mol-1

Haba pembakaran/ kJ mol-1

5

0

0

0 1 2 3 4

500

1000

1500

2000

2500

3000

3500


5

[KK0512 –Menyatakan masalah]


3(a)

Able to give the problem statement correctly

Sample answer:

How does different type of metals in contact with iron affect

rusting?//

Does more electropositive metal in contact with iron inhibit the

rusting of iron?//

Does less electropositive metal in contact with iron speed up the

rusting of iron?

3

Able to give the problem statement less correctly

To investigate the affect of other metals on the rusting of iron//

How does a metal affect the rusting of iron?

2

Able to state an idea of hypothesis

More electropositive metal inhibit the rusting of iron//

Less electropositive metal speed up the rusting of iron

1

No response or wrong response

0

KK0512 – Menyatakan pemboleh ubah]

Question Rubric Marks

3(b)

Able to state all the three variables correctly

Manipulated variable :

Name of metal R and metal S// type of metals

Responding variable :

Rusting of iron//iron rust//formation of blue spot

Constant variables:

Iron nail//Gelatine solution with potassium

hexacyanoferrate(III) and phenolpthtalein

3

Able to state any two variables correctly 2

Able to state any one variable correctly 1

No response or wrong response

0


6

[KK0512 – Menulis hipotesis]

Question

Rubric Marks

3(c) Able to state the relationship between the manipulated variable

and the responding variable and state the direction.

Sample answer:

When a more electropositive metal is in contact with iron,

the metal inhibits rusting. // When a less electropositive

metal is in contact with iron, the metal speed up rusting

3

Able to state the relationship between the manipulated variable

and the responding variable less correctly

Sample answer:

A more electropositive metal will prevent iron from

rusting. // A less electropositive metal will cause iron to

rust.

2

Able to state an idea of hypothesis

Sample answer:

Metal R and metal S affect rusting (of iron)

1


[KK0512 – Menyenaraikan bahan dan radas]

Question Rubric Mark

3 (d) Able to give complete list of substances and apparatus

Answer:

Substances

Two Iron nails,

Magnesium/zinc/aluminium strip

Tin/copper/lead/silver strip

Potassium hexacyanoferrate(III) solution +

phenolphthalein

[Any suitable electrolyte]/[water]

Apparatus

Test tube/boiling tube

Test tube rack

Sand paper

3

Able to list basic materials and apparatus

Sample answer:

Materials

Magnesium/zinc/aluminium strip

Tin/copper/lead/silver strip

Iron nail

Any suitable electrolyte

2


7

Apparatus:

Any suitable container

Able to give an idea of the materials and apparatus

Sample answer:

Materials

Iron

Any electrolyte

Apparatus

Any suitable container

1


[KK0512 – Memilih teknik]


3 (e)

Able to state all the steps correctly

Sample answer:

1. Clean the iron nails and metals strip with sand paper.

2. Coil iron nails with magnesium ribbon and copper strip.

3. Put the coiled iron nail into different test tubes.

4. Pour the hot jelly solution containing potassium

hexacyanoferrate(III)solution and phenolphthalein into

the test tube.

5. Leave the test tube in a test tube rack for a day.

6. Record the observation.

3

Able to state the steps 2,4,and 6 correctly 2

Able to state steps 2 and 4 correctly

[2 and 4 ]//the idea combining iron and any metals and any

substances

1



8

[KK0512 – Mempamerkan perancangan]


3 (f) Able to tabulate the data with the following aspects

1. Heading for the manipulated variables

[pair of metals//Test Tube]

2. Heading for responding variables

Sample answer:

Pair of metals Observation

Mg/Fe

Cu/Fe

2

Able to give an idea on tabulation of data at least one

information stated in the table

1. At least one heading

Sample answer

Set

1


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