Kimia MRSM SPM 2008

CONFIDENTIAL

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Chemistry

Paper 1

September

2008

1 ¼ hour

SPM TRIAL EXAMINATION 2008

MARA JUNIOR SCIENCE COLLEGE

CHEMISTRY

Paper 1

One hour and fifteen minutes

DO NOT OPEN THE QUESTION BOOKLET

UNTIL BEING TOLD TO DO SO.

1. The question booklet is bilingual.

Kertas soalan ini adalah dalam dwibahasa.

2. Candidates are advised to read information on the back page of the question booklet.

Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.

This question booklet has 30 printed pages

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CONFIDENTIAL

1 Diagram 1 shows the inter conversion of water, steam and ice.

In which conversion do H2O molecules lose speed? Rajah 1 menunjukkan perubahan keadaan air, ais dan stim.

Dalam perubahan manakah molekul H2O hilang kelajuan?

Diagram 1 Rajah 1

A Ice → water Ais → air

B Ice → steam Ais → stim

C Water → steam Air → stim

D Steam → ice Stim → ais

2 Which of the following formula represents a compound containing three atoms? Antara formula berikut, yang manakah mewakili sebatian yang mengandungi tiga atom?

A HNO3

B H2O

C LiF

D ZnSO4

3 A covalent compound does not conduct electricity because Sebatian kovalen tidak mengalirkan arus elektrik kerana

A it does not dissolve in water ia tidak larut dalam air

B it has strong covalent bonding ia mempunyai ikatan kovalen yang kuat

C particles consist of molecules zarah terdiri daripada molekul

D ions in the covalent compound are not mobile ion-ion dalam sebatian kovalen tidak bergerak bebas

Steam Stim

Water Air

Ice Ais

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4 Table 1 shows the nucleon numbers and proton numbers of atoms W, X, Y, and Z. Jadual 1 menunjukkan nombor nukleon dan nombor proton bagi atom-atom W, X, Y, dan Z.

W X Y Z

Nucleon number Nombor nukleon

35 37 40 39

Proton number Nombor proton

17 17 18 19

Table 1 Jadual 1

How many atom(s) represent non-metallic elements? Berapa atomkah mewakili unsur bukan logam?

A 1

B 2

C 3

D 4

5 Diagram 2 shows a circuit where the bulb lights up. Rajah 2 menunjukkan satu litar dimana mentolnya menyala.

Diagram 2 Rajah 2

What is substance G? Apakah bahan G?

A A solution of ethanol in water Larutan etanol dalam air

B Aqueous sodium chloride Natrium klorida akues

C Solid sodium chloride Pepejal natrium klorida

D Liquid ethanol Cecair etanol

Bulb Mentol

Substance G Bahan G

Electrodes Elektrod

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CONFIDENTIAL

6 In which experiment the limewater does not turn cloudy?

Dalam eksperimen manakah air kapur tidak menjadi keruh?

A B

C

D

7 Lead(II) iodide is formed when aqueous lead(II) nitrate is added to a solution

containing iodide ions.

What type of reaction takes place? Plumbum(II) iodida terbentuk apabila plumbum(II) nitrat akueus dicampur kepada larutan yang

mengandungi ion iodida.

Apakah jenis tindak balas yang berlaku?

A Neutralisation Peneutralan

B Oxidation Pengoksidaan

C Reduction Penurunan

D Precipitation Pemendakan

8 A salt always .. Garam sentiasa

A contains ions mengandungi ion

B dissolves in water larut dalam air

C forms white crystals membentuk hablur putih

D conducts electricity mengalirkan arus elektrik

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CONFIDENTIAL

9 The bodies of an aeroplane, a car and a wheelbarrow are made of alloy. Rangka kapalterbang, kereta dan kereta sorong diperbuat daripada aloi.

Diagram 3

Rajah 3

Which alloy is used in making the bodies of aeroplane, car and wheelbarrow? Antara aloi berikut, yang manakah digunakan untuk membuat rangka kapalterbang, kereta dan kereta

sorong?

Aeroplane Kapalterbang

Car Kereta

Wheelbarrow Kereta sorong

A Magnalium Magnalium

Brass Loyang

Steel Keluli

B Duralumin Duralumin

Steel Keluli

Steel Keluli

C Pewter Pewter

Bronze Gangsa

Brass Loyang

D Steel Keluli

Stainless steel Keluli nirkarat

Solder Pateri

10 Copper wires in an electricity cable are covered in plastic as shown in diagram 4.

Plastic is used because it is Dawai kuprum dalam kabel elektrik disalut dengan plastik seperti Rajah 4.

Plastik digunakan sebab ia

Diagram 4

Rajah 4

A hard. keras

B a polymer. polimer

C an insulator. penebat

D melts easily. mudah dilebur

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CONFIDENTIAL

11 A solution of hydrogen peroxide releases oxygen slowly at room temperature. Larutan hidrogen peroksida membebaskan oksigen pada suhu bilik.

Hydrogen peroxide → water + oxygen Hidrogen peroksida → air + oksigen

Diagram 5 shows the effect of adding manganese(IV) oxide to the solution. Rajah 5 menunjukkan kesan penambahan mangan(IV) oksida kepada larutan tersebut.

Diagram 5 Rajah 5

What could be the reason for the observed change? Apakah sebab bagi perubahan yang diperhatikan?

A Manganese(IV) oxide acts as a catalyst Mangan(IV) oksida bertindak sebagai mangkin

B Manganese(IV) oxide reacts with the hydrogen peroxide Mangan(IV) oksida bertindak balas dengan hidrogen peroksida

C The hydrogen peroxide is neutralised by manganese(IV) oxide Hidrogen peroksida dineutralkan oleh mangan(IV) oksida

D The hydrogen peroxide becomes more concentrated Hidrogen peroksida bertambah pekat

12 Which of the following substance is found in crude oil? Antara bahan berikut yang manakah terdapat dalam minyak mentah?

A Ethanoic acid Asid etanoik

B Polythene Politena

C Ethanol Etanol

D Butane Butana

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13 2 g of marble is added to 10 cm3 of hydrochloric acid in four different test tubes.

In which test tube is the reaction fastest? 2 g marmar ditambah kepada 10 cm

3 asid hidroklorik dalam empat tabung uji berlainan.

Dalam tabung uji manakah menghasilkan tindak balas paling cergas?

A B

C D

14 What are formed when glucose is fermented? Apakah yang terbentuk dalam penapaian glukosa?

A Ethanol and carbon dioxide Etanol dan karbon dioksida

B Ethanol and oxygen Etanol dan oksigen

C Ethene and carbon dioxide Etena dan karbon dioksida

D Ethene and oxygen Etena dan oksigen

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15 Diagram 6 shows the apparatus set up used to study the reaction of metal oxide and

carbon. Rajah 6 menunjukkan susunan radas yang digunakan untuk mengkaji tindak balas antara logam oksida

dengan karbon.

Diagram 6 Rajah 6

Which of the following metal oxide will turn the lime water cloudy?

Antara oksida logam berikut yang manakah mengeruhkan air kapur?

A Magnesium oxide Magnesium oksida

B Copper(II) oxide Kuprum(II) oksida

C Calcium oxide Kalsium oksida

D Aluminium oxide Aluminium oksida

16 The reaction between solution P and solution Q is exothermic.

A student confirms this statement by mixing equal volumes of the two solutions and

measuring the temperature change.

Which two pieces of apparatus should the student use?

Tindak balas antara larutan P dan Q adalah eksotermik.

Pelajar mengesahkah pernyataan tersebut dengan mencampurkan isipadu yang sama bagi dua

larutan dan mengukur perubahan suhu.

Apakah dua radas yang perlu digunakan?

A Balance and stop watch Neraca dan jam randik

B Balance and thermometer Neraca dan termometer

C Pipette and stop watch Pipet dan jam randik

D Pipette and thermometer Pipet dan termometer

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17 Diagram 7 shows a set up where hydrogen is passed over a heated metal oxide. Rajah 7 menunjukkan susunan radas di mana hidrogen dilalirkan atas logam oksida yang panas.

Diagram 7

Rajah 7

What happens to the hydrogen and metal oxide? Apa berlaku kepada hidrogen dan oksida logam?

Hydrogen Hidrogen

Metal oxide Logam oksida

A Oxidised Dioksidakan

Oxidised Dioksidakan

B Reduced Diturunkan

Oxidised Dioksidakan

C Reduced Diturunkan

Reduced Diturunkan

D Oxidised Dioksidakan

Reduced Diturunkan

18 Diagram 8 shows the structure of a palmitate ion. Rajah 8 menunjukkan struktur bagi ion palmitat.

Diagram 8

Rajah 8

Which of the following statements is true? Antara pernyataan berikut yang manakah benar?

A Parts R and S are soluble in water Bahagian R dan S larut dalam air

B Parts R and S are soluble in grease Bahagian R dan S larut dalam gris

C Part R is soluble in grease and part S is soluble in water Bahagian R larut dalam gris dan S larut dalam air

D Part R is soluble in water and part S is soluble in grease Bahagian R larut dalam air dan S larut dalam gris

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19 Diagram 9 shows an experiment in which magnesium oxide powder is added to dilute

hydrochloric acid. Rajah 9 menunjukkan eksperimen di mana serbuk magnesium oksida ditambah ke dalam asid

hidroklorik cair.

Diagram 9 Rajah 9

Which reaction takes place in the experiment? Apakah tindak balas yang terlibat dalam eksperimen tersebut?

Exothermic Eksotermik

Neutralisation

Peneutralan

A

B

C

D

20 What is the function of an analgesic? Apakah fungsi analgesik?

A To relieve pain Mengurangkan rasa sakit

B To treat asthma Merawat asma

C To destroy bacteria Menghapuskan bakteria

D To calm down the emotion of the patient Menenangkan emosi pesakit

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CONFIDENTIAL

21 Table 2 shows the melting point and boiling points of five compounds J, K, L, M and

N. Which substance exists as a liquid at room temperature?

Jadual 2 menunjukkan takat lebur dan takat didih bagi lima sebatian J , K , L , M dan N. Antara bahan

berikut yang manakah wujud dalam keadaan cecair pada suhu bilik?

Substance

Bahan

Melting point(oC)

Takat lebur(0C)

Boiling point(oC)

Takat didih(oC)

J -160 -142

K -32 55

L -96 64

M 42 172

N 142 292

Table 2 Jadual 2

A J only J sahaja

B J and K only J dan K sahaja

C K and L only K dan L sahaja

D M and N only M dan N sahaja

22 When propane is burned in excess oxygen, carbon dioxide and water are formed and

is represented by the equation Apabila propana dibakar dalam oksigen berlebihan, karbon dioksida dan air dihasilkan dan di wakili

oleh persamaan berikut

C3H8 + 5O2 → r CO2 + s H2O

What are the values of r and s that balances the equation? Apakah nilai r dan s yang mengimbangkan persamaan tersebut?

r s

A 1 3

B 1 5

C 3 4

D 3 8

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23 Diagram 11 shows part of the Periodic Table of Elements. Rajah 11 menunjukkan sebahagian daripada Jadual Berkala Unsur

Diagram 11

Rajah 11

The proton number of X is Numbor proton X adalah

A seven less than that of Z kurang tujuh daripada Z

B three less than that of Z kurang tiga daripada Z

C one less than that of Y kurang satu daripada Y

D sixteen less than that of Y kurang enam belas daripada Y

24 Diagram12 shows a model of a molecule containing carbon, hydrogen and oxygen. Rajah 12 menunjukkan model bagi satu molekul yang mengandungi karbon, hidrogen dan oksigen.

Diagram 12

Rajah 12

How many atoms of each element are in the molecule? Berapakah bilangan atom bagi setiap unsur dalam molekul tersebut?

Carbon Karbon

Hydrogen Hidrogen

Oxygen Oksigen

A 1 6 2

B 2 5 1

C 2 6 1

D 6 2 1

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CONFIDENTIAL

25 Diagram 13 shows a simple voltaic cell by using different electrode T and N. Rajah 13 menunjukkan sel kimia ringkas menggunakan elektrod berbeza, T dan N.

Electrode T Electrode N

Elektrod T Elektrod N

Copper (II) sulphate solution

Larutan kuprum(II) sulfat

Diagram 13 Rajah 13

Metal T acts as the positive terminal and the potential difference is 1.9 V.

Which of the following statements is true? Logam T bertindak sebagai terminal positif dan beza upaya ialah 1.9V .

Antara pernyataan berikut yang manakah benar tentang sel kimia itu?

A T is more electropositive than N T lebih elektropositif daripada N

B Brown solid is deposited at N electrode Pepejal perang terenap di elektrod N

C Electron flows from T to N through the external circuit Elektron mengalir dari T ke N melalui litar luar

D The potential difference will decrease if T is replaced by any other more

electropositive metal than T Beza upaya akan berkurang jika T digantikan oleh logam lain yang lebih elektropositif

daripada T

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CONFIDENTIAL

26 Diagram 14 shows the pH values of the soil in part F and part G of a palm oil plantation. Rajah 14 menunjukkan nilai pH bagi tanah di bahagian F dan G bagi suatu ladang kelapa sawit.

Diagram 14

Rajah 14

The owner wishes to use lime to neutralise the soil in one part of the plantation

Which part should the lime(calcium oxide) be added, and why? Pemilik ladang bercadang menggunakan kapur untuk meneutralkan sebahagian daripada ladangnya.

Bahagian manakah yang perlu ditambah kapur dan mengapa?

A F because lime is acidic F sebab kapur berasid

B F because lime is basic F sebab kapur beralkali

C G because lime is acidic G sebab kapur berasid

D G because lime is basic G sebab kapur beralkali

27 Diagram 15 shows how ion W in a solution can be identified. Rajah 15 menunjukkan bagaimana ion W dalam larutan dapat dikenalpasti.

Diagram 15

Rajah 15

What is ion W? Apakah ion W?

A NH4 +

(aq)

B Al3+

(aq)

C NO3-

(aq)

D SO42-

(aq)

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CONFIDENTIAL

28 Polymerization occurs when many small molecules combined to form a long chained

molecule (polymer).

Diagram 16 shows the structure of a small molecule. Pempolimeran berlaku apabila banyak molekul kecil bergabung membentuk molekul berantai panjang

(polimer).

Rajah 16 menunjukkan struktur suatu molekul kecil

Diagram 16

Rajah 16

Which of the following represents the structure of a polymer formed when these small

molecules are linked together? Antara berikut yang manakah mewakili struktur polimer yang terbentuk apabila molekul kecil tersebut

bergabung?

A

B

C

D

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CONFIDENTIAL

29 Ethanol reacts with ethanoic acid to form ethyl ethanoate. Etanol bertindak balas dengan asid etanoik membentuk etil etanoat.

C2H5OH + CH3COOH → CH3COOC2H5 + H2O

What is the formula of the ester formed when methanol reacts with butanoic acid,

(C3H7COOH)? Apakah formula bagi ester yang terbentuk apabila metanol bertindak balas dengan asid butanoik,

(C3H7COOH)?

A C2H5COOC2H5

B C3H7COOC2H5

C C3H7COOCH3

D CH3COOC3H7

30 Diagram 17 shows set up of apparatus to study the rate of reaction. Magnesium is

added to excess dilute hydrochloric acid at 25 oC

Rajah 17 menunjukkan susunan radas untuk mengkaji kadar tindak balas. Magnesium ditambah

kepada asid hidroklorik berlebihan pada suhu 25oC.

Diagram 17

Rajah 17

Which of the following effects on rate and amount of product are correct when the

concentration of acid and temperature are increased? Antara kesan ke atas kadar dan kuantiti hasil berikut yang manakah betul apabila kepekatan asid dan

suhu ditambah?

Increase concentration

of acid Penambahan kepekatan asid

Increase temperature Penambahan suhu

Amount of

product Kuantiti hasil

A Increase rate of reaction Kadar tindak balas bertambah

Increase rate of reaction Kadar tindak balas bertambah

no change Tidak berubah

B Decrease rate of reaction Kadar tindak balas berkurang

Decrease rate of reaction Kadar tindak balas berkurang

Increase Bertambah

C Decrease rate of reaction Kadar tindak balas berkurang

Increase rate of reaction Kadar tindak balas bertambah

Decrease Berkurang

D Increase rate of reaction Kadar tindak balas bertambah

Decrease rate of reaction Kadar tindak balas berkurang

Increase

Bertambah

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CONFIDENTIAL

31 Diagram 18 shows oxidation process of ethanol. Rajah 18 menunjukkan proses pengoksidaan etanol

Diagram 18

Rajah 18

What can be observed after being heated for 5 minutes? Apakah yang dapat diperhatikan selepas 5 minit dipanaskan?

A No colour change Tiada perubahan warna

B All of the ethanol vapourises and the flask becomes dry Semua etanol meruap dan kelalang kering

C The colour of mixture changes from orange to green Warna larutan campuran bertukar dari jingga ke hijau

D The mixture in the flask separated into two layers. The upper layer is yellow

while the lower layer is green Campuran dalam kelalang membentuk dua lapisan. Lapisan atas berwarna kuning, lapisan

bawah berwarna hijau

Ethanol with acidified

potassium dichromate Campuran etanol

dan kalium dikromat berasid

Water in Air masuk

Water out Air keluar

Heat Haba

Air

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CONFIDENTIAL

32 Diagram 19 shows the apparatus set up used to investigate the rusting of iron. Rajah 19 menunjukkan susunan radas yang digunakan untuk mengkaji pengaratan besi

Diagram 19 Rajah 19

In which test-tubes will the iron rust? Dalam tabung uji manakah besi mengalami pengaratan?

A I only I sahaja

B II only II sahaja

C I and III only I dan III sahaja

D II and III only II dan III sahaja

33 Diagram 20 shows a match. By striking the match, a chemical reaction is initiated. Rajah 20 menunjukkan sebatang mancis. Apabila mengores mancis, satu tindak balas akan dimulakan.

Diagram 20

Rajah 20

Which statements about the chemical reaction are correct? Antara pernyataan berikut yang manakah benar mengenai tindak balas di atas?

A Reaction is endothermic because energy is used to strike the match Tindak balas adalah endotermik sebab tenaga digunakan untuk mengores mancis

B Reaction is endothermic because energy is given out as the match burns Tindak balas adalah endotermik sebab tenaga dibebaskan apabila mancis terbakar

C Reaction is exothermic because energy is used to strike the match Tindak balas adalah eksotermik sebab tenaga digunakan untuk mengores mancis

D Reaction is exothermic because energy is given out as the match burns Tindak balas adalah eksotermik sebab tenaga dibebaskan apabila mancis terbakar

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CONFIDENTIAL

34 Diagram 21 shows apparatus set up used to prepare barium chloride and barium

sulphate. In each experiment, the acid is run into the conical flask until the resulting

liquid has pH7. Rajah 21 menunjukkan dua susunan radas untuk menghasilkan barium klorida dan barium sulfat.

Dalam setiap eksperimen, asid dititis ke dalam kelalang kon sehingga larutan mencapai pH 7.

Diagram 21

Rajah 21

What are the next steps to obtain samples of the solid salts? Apakah langkah seterusnya untuk mendapatkan garam dalam bentuk pepejal?

Barium chloride Barium klorida

Barium sulphate Barium sulfat

A Crystallisation

Penghabluran Crystallisation

Penghabluran

B Crystallisation

Penghabluran Filtration Penurasan

C Filtration Penurasan

Crystallisation Penghabluran

D Filtration Penurasan

Filtration Penurasan

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35 For complete combustion, one molecule of an organic compound needs six molecules

of oxygen.

What could the formula of this compound be? Untuk pembakaran lengkap, satu molekul sebatian organik memerlukan enam molekul oksigen.

Apakah formula bagi sebatian tersebut?

A C2 H4

B C2 H6

C C4 H8

D C H3OH

36 Redox reaction between iron(II) ion and manganate(VII) ion is represented by the

equation: Tindak balas redoks antara ion ferum(II) dan ion manganat(VII) diwakili oleh persamaan:

5 Fe2+

+ MnO4- + 8 H

+ → 5 Fe

3+ + Mn

2+ + 4 H2O

What can be deduced from the equation? Apakah yang dapat disimpulkan daripada persamaan ini?

I The oxidation state of manganese changes from +7 into +2 Nombor pengoksidaan mangan berubah dari +7 kepada +2

II The oxidation state of hydrogen changes from +1 into 0 Nombor pengoksidaan hidrogen berubah dari +1 kepada 0

III The greenish colour of iron(II) ions solution turns to colourless Warna hijau ion ferum(II) bertukar kepada tidak berwarna

IV Electrons transfer from iron(II) ions to manganate(VII) ions Pemindahan elektron dari larutan ion ferum(II) kepada ion manganat(VII)

A I and III only I dan III sahaja

B I and IV only I dan IV sahaja

C I, II and III only I, II dan III sahaja

D I, II, III and IV I, II, III dan IV

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CONFIDENTIAL

37 Table 3 describes the structures of four particles. Jadual 3 menunjukkan struktur bagi empat zarah.

Particle Zarah

Number of

protons Bilangan proton

Number of

neutrons Bilangan neutron

Number of electrons

Bilangan elektron

O 8 8 8

O 2-

8 8 P

Na 11 Q 11

Na+

11 12 R

Table 3 Jadual 3

What are the correct values of P, Q and R? Apakah nilai yang betul bagi P, Q dan R?

P Q R

A 9 11 10

B 9 11 11

C 10 12 10

D 10 12 11

38 L and M are diatomic elements. L is less reactive than M.

Which of the following elements are L and M? L dan M adalah unsur-unsur dwiatom.

Antara berikut yang manakah merupakan unsur L dan M?

L M

A Bromine

Bromin Iodine

Iodin

B Iodine Iodin

Bromine Bromin

C Sodium Natrium

Potassium Kalium

D Potassium

Kalium Sodium

Natrium

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CONFIDENTIAL

39 Table 4 gives information about the ability of four substances to conduct electricity. Jadual 4 menunjukkan maklumat mengenai kebolehan empat bahan untuk mengalirkan elektrik.

Substance Bahan

Electrical conductivity Kekonduksian elektrik

R Does not conduct under any conditions Tidak mengalirkan arus elektrik dalam semua keadaan

T Conducts only in aqueous solution Mengalirkan arus elektrik dalam keadaan berair sahaja

U Conducts in molten and solid state Mengalirkan arus elektrik dalam keadaan leburan dan pepejal

W Conducts in molten state and aqueous solution Mengalirkan arus elektrik dalam keadaan leburan dan larutan berair

Table 4 Jadual 4

What could these four substances be? Apakah keempat-empat bahan ini?

R T U W

A Pb HCl NaCl S

B S HCl NaCl Pb

C S HCl Pb NaCl

D S NaCl HCl Pb

40 Heating ammonium salts with sodium hydroxide will produce ammonia gas.

Which of the following ammonium salt can produce the greatest volume of ammonia

gas? Pemanasan garam ammonium dengan natrium hidroksida menghasilkan gas ammonia.

Antara garam ammonium berikut yang manakah akan menghasilkan isipadu gas ammonia tertinggi?

A 0.5 mol (NH4)3PO4

B 0.5 mol (NH4)2SO4

C 1.0 mol NH4Cl

D 1.0 mol NH4NO3

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41 Diagram 22 shows an incomplete apparatus set up. Rajah 22 menunjukkan susunan radas yang tidak lengkap.

Diagram 22

Rajah 22

Which of the following diagrams shows the correct completion at X after the solution

has been electrolysed for some time? Antara rajah berikut yang manakah merupakan pelengkap yang betul di X selepas elektrolisis

dijalankan beberapa ketika?

A

B

C

D

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42 Diagram 23 shows an electrolytic circuit using inert electrodes.

At which electrode is metal deposited? Rajah 23 menunjukkan satu litar elektrolisis menggunakan elektrod lengai.

Pada elektrod manakah logam terenap?

Molten lead(II) bromide Plumbum(II) bromida lebur

Aqueous sodium chloride

Natrium klorida akueus Heat

Diagram 23 Rajah 23

43 Dilute hydrochloric acid was reacted with magnesium ribbon and the volume of

hydrogen gas evolved was measured for the first 80 s. Asid hidroklorik cair ditindak balaskan dengan pita magnesium dan isipadu gas hidrogen terbebas

diukur bagi 80 saat pertama.

What was the average rate of production of hydrogen? Apakah kadar purata bagi pembebasan hidrogen?

A 0.4 cm3/ s

B 2.5 cm3/ s

C 4.0 cm3/ s

D 40.0 cm3/ s

Panaskan

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44 Diagram 24 shows some reactions of a compound J. Rajah 24 menunjukkan beberapa tindak balas bagi sebatian J.

Excess HNO3

HNO3 berlebihan

+

Excess NaOH

NaOH berlebihan

Diagram 24 Rajah 24

What could compound J be? Apakah sebatian J?

A Aluminium carbonate Aluminium karbonat

B Magnesium carbonate Magnesium karbonat

C Copper(II) carbonate Kuprum(II) karbonat

D Zinc carbonate Zink karbonat

Compound J Sebatian J

Gas Colourless solution Larutan tanpa warna

White precipitate in excess NaOH Mendakan putih dalam NaOH berlebihan

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45 Calcium carbonate reacts with excess hydrochloric acid at room temperature and is

represented by the equation Kalsium karbonat bertindak balas dengan asid hidroklorik berlebihan pada suhu bilik dan diwakili

oleh persamaan.

CaCO3 + 2HCl → CaCl2 + H2O + CO2

Two experiments were carried out. Dua eksperimen telah dijalankan.

Experiment I: 10 g of calcium carbonate in large lumps. Eksperimen I: 10 g ketulan kalsium karbonat

Experiment II: 5 g of calcium carbonate as a fine powder. Eksperimen II: 5g serbuk kalsium karbonat

Which of the following graph of volume of gas against time is correct? Antara graf isipadu gas melawan masa berikut yang manakah benar?

A

B

C

D

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CONFIDENTIAL

46 Ethene reacts with steam in the presence of a suitable catalyst.

What is the structural formula of the compound formed? Etena akan bertindak balas dengan stim dalam kehadiran mangkin yang sesuai.

Apakah formula struktur bagi sebatian yang terbentuk?

47 Powdered carbon and copper are separately heated as shown in Diagram 25. Serbuk karbon dan kuprum dipanaskan secara berasingan seperti ditunjukkan dalam Rajah 25.

Diagram 25

Rajah 25

What are the changes in the masses of the powder? Apakah perubahan jisim bagi kedua-dua serbuk?

Carbon Karbon

Copper Kuprum

A Decrease Berkurangan

Decrease Berkurangan

B Decrease Berkurangan

Increase Bertambah

C Increase Bertambah

Decrease Berkurangan

D Increase Bertambah

Increase Bertambah

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CONFIDENTIAL

48 Table 5 shows the result of three experiments involving halogen displacement. Jadual 5 menunjukkan keputusan bagi tiga eksperimen penyesaran halogen.

Experiment Eksperimen

Halogen added Halogen ditambah

Halide solution Larutan halida

X-

Y-

Z-

I X2 - Y2 produced Y2 dihasilkan

Z2 produced Z2 dihasilkan

II Y2 No reaction

Tiada perubahan -

No reaction Tiada perubahan

III Z2 No reaction

Tiada perubahan Y2 produced Y2 dihasilkan

-

Table 5 Jadual 5

What are halogens X, Y and Z? Apakah halogen X, Y dan Z?

X Y Z

A Br Cl I

B Br I Cl

C Cl I Br

D Cl Br I

49 The thermochemical equation represents the displacement of iron. Persamaan termokimia mewakili tindak balas penyesaran ferum.

Mg(s) + Fe2+

(aq) → Mg2+

(aq) + Fe(s) = -189 kJ mol 1

Which of the following statements are true? Manakah antara berikut benar?

I Magnesium is oxidized Magnesium dioksidakan

II Reaction is exothermic Tindak balas adalah eksotermik

III The temperature decreases Suhu berkurangan

IV The heat released by reacting 0.2 mole of ferum(II) ions is 37.8 kJ Haba yang dibebaskan semasa 0.2 mol ion ferum(II) bertindak balas ialah 37.8 kJ mol

-1.

A I and II only I dan II sahaja

B II and IV only II dan IV sahaja

C III and IV only III dan IV sahaja

D I, II and IV only I,II dan IV sahaja

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CONFIDENTIAL

50 When zinc nitrate is heated strongly, it decomposes according to the equation Apabila zink nitrat di panaskan dengan kuat, ia akan terurai mengikut persamaan

2 Zn(NO3)2 → 2 ZnO + 4 NO2 + O2

Which of the following will be produced when 18.9 g of zinc nitrate is heated?

[Molar mass Zn(NO3)2 = 189 gmol-1

, molar mass zinc oxide = 81 gmol-1

and 1 mol

of gas occupies a volume of 24 dm3 at room temperature and pressure]

Antara berikut yang manakah akan terhasil jika 18.9 g zink nitrat dipanaskan?

[Jisim molar: Zn(NO3)2 =189 gmol-1

, molar mass ZnO = 81 gmol-1

dan 1 mol gas menempati isipadu

sebanyak 24 dm3 pada suhu dan tekanan bilik]

A 4.8 dm3 nitrogen dioxide gas

4.8 dm3 gas nitrogen dioksida

B 0.04 mol of oxygen gas 0.04 mol of gas oksigen

C 7.1 g zinc oxide 7.1 g zink oksida

D 2.4 dm3 oxygen gas

2.4 dm3 gas oksigen


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CONFIDENTIAL

INFORMATION FOR CANDIDATES

MAKLUMAT UNTUK CALON

1. This question paper consists of 50 questions. Kertas soalan ini mengandungi 50 soalan.

2. Answer all questions. Jawab semua soalan

3. Each question is followed by four alternative answers A, B, C and D. For each

question, choose one answer only. Blacken your answer on the objective answer sheet

provided. Tiap-tiap soalan di ikuti oleh empat pilihan jawapan, iaitu A, B, C dan D. Bagi setiap soalan, pilih satu

jawapan sahaja. Hitamkan jawapan anda pada kertas jawapan objektif yang disediakan.

4. If you wish to change your answer, erase the blackened mark that you have made.

Then blacken the new answer. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan

jawapan yang baru.

5. The diagrams in the questions provided are not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.

6. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

Name : …………………………………….

Index Number: …......…………………….

SPM TRIAL EXAMINATION 2008

MARA Junior Science College

CHEMISTRY

Paper 2

Two hours and thirty minutes

DO NOT OPEN THE QUESTION BOOKLET

UNTIL BEING TOLD TO DO SO

1. Write your name and index number in the

spaces provided. Tuliskan nama dan angka giliran anda pada ruang

yang disediakan.

2. The question booklet is bilingual

Kertas soalan ini adalah dalam dwibahasa.

3. Candidate is required to read the information

at the back page of the question booklet. Calon dikehendaki membaca maklumat di halaman

belakang kertas soalan ini .

Kod Pemeriksa

Section Question Full

mark Marks

A

1 9

2 9

3 10

4 10

5 11

6 11

B

7 20

8 20

C

9 20

10 20

TOTAL

This booklet contains 32 printed pages.

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Chemistry

Paper 2

Sept 2008

2 ½ hour


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CONFIDENTIAL

Section A Bahagian A

[60 marks]

[60 markah]

Answer all questions in this section. Jawab semua soalan dalam bahagian ini.

1 Diagram 1.1 shows the set up of the apparatus used in an experiment to determine

the melting point of a substance M. Rajah 1.1 menunjukkan susunan radas yung digunakan untuk menentukan takat lebur bahan M.

Diagram 1.1 Rajah 1.1

(a) (i) State one error in Diagram 1.1 Nyatakan satu kesilapan di dalam Rajah 1.1.

……………………………………………………………………...

[1 mark] [1 markah]

(ii) Why water bath is used to heat the substance M? Mengapakah kukus air digunakan untuk memanaskan bahan M?

……………………………………………………………………...

[1 mark] [1 markah]

For

Examiner’s

Use

1(a)(i)

i)

1(a)(ii)

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(b) Diagram 1.2 shows a graph of temperature against time when solid of

substance M is heated. Rajah 1.2 menunjukkan graf suhu melawan masa apabila pepejal bahan M dipanaskan.

Diagram 1.2

Rajah 1.2

(i) What is the melting point of substance M? Berapakah takat lebur bahan M?

……………………………………………………………………...

[1 mark] [1 markah]

(ii) State the physical state of substance M at point F. Nyatakan keadaan fizikal bahan M pada titik F.

……………………………………………………………………...

[1 mark] [1 markah]

(iii) Compare kinetic energy of particles at points E and F Bandingkan tenaga egativ zarah-zarah pada titik E dan F.

……………………………………………………………………...

[1 mark] [1 markah]

For

Examiner’s

Use

1(b)(iii)

1(b)(i)

1(b)(ii)

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CONFIDENTIAL

(iv) Draw the arrangement of particles of substance M at 60oC and

90oC.

Lukiskan susunan zarah-zarah bahan M pada suhu 60OC dan 90

OC.

60oC 90

oC

[2 marks] [2 markah]

(c) Diagram 1.3 shows the structural formula of substance M. Rajah 1.3 menunjukkan formula struktur bahan M.


(i) What is meant by molecular formula? Apakah yang dimaksudkan dengan formula molekul?

……………………………………………………………………...

……………………………………………………………………...

[1 mark] [1 markah]

(ii) State the molecular formula of substance M. Nyatakan formula molekul bahan M.

……………………………………………………………………...

[1 mark] [1 markah]

For

Examiner’s

Use

1(b)(iv)

1(c)(i)

1(c)(ii)

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CONFIDENTIAL

2 Diagram 2 shows the set up of apparatus of two types of cells.

Rajah 2 menunjukkan susunan radas dua jenis sel.

Cell I Sel I

Cell II Sel II

Diagram 2 Rajah 2

(a) For the reaction in Cell I, Bagi tindak balas Sel I,

(i) State the energy change. Nyatakan perubahan tenaga

..……………………………………………………………………..

(ii) State one observation. Nyatakan satu pemerhatian

..……………………………………………………………………..


(b) Identify the negative terminal of Kenalpasti terminal negatif di

Cell I : …………………………………………………………………….. Sel I

Cell II : ……………………………………………………………………..

Sel II [2 marks] [2 markah]

(c) For the reaction that occurs in Cell II: Bagi tindak balas yang berlaku di Sel II:

(i) What is the function of the porous pot? Apakah fungsi pasu berliang?

………………………………………………………………………

[1 mark] [1 markah]

For

Examiner’s

Use

2(b)

2(c)(i)

2(a)

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CONFIDENTIAL

(ii) State one observation. Nyatakan satu pemerhatian.

………………………………………………………………………

[1 mark] [1 markah]

(iii) Write the overall ionic equation Tulis persamaan ion keseluruhan

……………………………………………………………………...

[1 mark] [1 markah]

(d) Zinc electrode and zinc sulphate solution in Cell II are replaced by iron

electrode and iron (II) sulphate solution.

State the changes to the voltmeter reading. Explain your answer.

Elektrod zink dan larutan zink sulfat dalam sel II digantikan dengan elektrod ferum dan

larutan ferum (II ) sulfat,

Nyatakan perubahan kepada bacaan voltmeter. Terangkan jawapan anda..

………………………………………………………………………………

………………………………………………………………………………


For

Examiner’s

Use

2(d)

2(c)(ii)

2(c)(iii)

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CONFIDENTIAL

3 Diagram 3 shows the apparatus set-up for the preparation of zinc sulphate from

zinc carbonate and an acid. Rajah 3 menunjukkan susunan radas untuk penyediaan zink sulfat daripada zink karbonat dengan

suatu asid.

Heat

Step 1

Step II

Step IV

Heat

Step III

Diagram 3 Rajah 3

(a) What is meant by salt? Apakah yang dimaksudkan dengan garam?

………………………………………………………………………………

………………………………………………………………………………

[1 mark] [1 markah]

(b) (i) Draw the diagram for step II in the box provided. Lukis gambar rajah untuk langkah II di dalam kotak yang disediakan.


(ii) What is the purpose of carrying out step II? Apakah tujuan melakukan langkah II?

………………………………………………………………………

[1 mark] [1 markah]

For

Examiner’s

Use

3(b)(ii)

3(a)

3(b)(i)

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CONFIDENTIAL

(c) (i) Name the acid used. Namakan asid yang digunakan.

………………………………………………………………………

[1 mark] [1 markah]

(ii) Write the chemical equation for the reaction. Tuliskan persamaan kimia untuk tindak balas tersebut.

………………………………………………………………………


(d) The chart shows the reaction of zinc sulphate and metal X. Carta menunjukkan tindak balas antara zink sulfat dengan logam X.

(i) Suggest a name for metal X. Cadangkan nama untuk logam X.

………………………………………………………………………

[1 mark] [1 markah]

(ii) What is observed when aqueous ammonia is added in excess to

zinc sulphate solution? Apakah yang diperhatikan apabila ammonia akueus ditambah kepada larutan

zink sulfat sehingga berlebihan?

………………………………………………………………………

………………………………………………………………………


3(d)(ii)

3(c)(i)

Zinc sulphate Zink sulfat

X sulphate + zinc X sulfat + zink

+ X

3(d)(i)

3(c)(ii)

For

Examiner’s

Use

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CONFIDENTIAL

4 Vinegar is aqueous ethanoic acid. The concentration of ethanoic acid in the

vinegar was determined by titrating the vinegar with 0.10 mol dm-3

sodium

hydroxide solution using phenolphthalein as an indicator. The result of the

experiment is shown in Table 4.

Cuka adalah larutan asid etanoik. Kepekatan asid etanoik dalam cuka ditentukan melalui

pentitratan dengan 0.10 mol dm -3

larutan natrium hidroksida dengan menggunakan fenoftalein

sebagai penunjuk. Keputusan eksperimen di tunjukkan dalam Jadual 4.

The following equation represents the reaction: Persamaan berikut mewakili tindak balas tersebut:

CH3COOH + NaOH CH3COONa + H2O

Titration I

Penitratan I Titration II Penitratan II

Titration III Penitratan III

Initial burette reading / cm3

Bacaan awal buret 0.00 23.40 0.00

Final burette reading / cm3

Bacaan akhir buret 23.40 47.00 23.50

Volume of NaOH used / cm3

Isipadu NaOH digunakan

Table 4 Jadual 4

(a) Ethanoic acid is a weak acid.

What is meant by weak acid? Asid etanoik adalah asid lemah.

Apakah dimaksudkan dengan asid lemah.

………………………………………………………………………………

………………………………………………………………………………

[1 mark] [1 markah]

(b) State the colour change of phenolphthalein at the end point. Nyatakan perubahan warna fenolftalein pada takat akhir.

………………………………………………………………………………

[1 mark] [1 markah]

(c) (i) Complete Table 4 by calculating the volume of sodium hydroxide

solution used in each titration Lengkapkan Jadual 4 dengan menghitung isipadu larutan natrium hidroksida

yang digunakan dalam setiap pentitratan. [1 mark]

[1 markah]

For

Examiner’s

Use

4(c)(i)

4(a)

4(b)

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CONFIDENTIAL

(ii) Calculate the average volume of 0.10 mol dm-3

of sodium

hydroxide solution used to neutralize 25.00 cm3 of vinegar.

Hitung isipadu purata larutan natrium hidroksida 0.10 mol dm-3

yang digunakan

untuk meneutralkan 25.00 cm3 cuka.

[1 mark] [1 markah]

(d) (i) Calculate the number of moles of sodium hydroxide used to

neutralize 25.0 cm3 of vinegar.

Hitung bilangan mol natrium hidroksida yang digunakan untuk meneutralkan

25.00 cm3 cuka.

[1mark] [1 markah]

(ii) Calculate the concentration of ethanoic acid in the vinegar. Hitung kepekatan asid etanoik dalam cuka..


4(c)(ii)

4(d)(i)

4(d)(ii)

For

Examiner’s

Use

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CONFIDENTIAL

(e) The experiment is repeated using 0.10 mol dm-3

of barium hydroxide to

replace sodium hydroxide.

Predict the volume of barium hydroxide solution required to neutralize

25.00 cm3 of vinegar.

Explain your answer.

Eksperimen diulangi menggunakan larutan barium hidroksida 0.10 mol dm-3

menggantikan larutan natrium hidroksida..

Ramalkan isipadu larutan barium hidroksida yang diperlukan untuk menutralkan 25.00 cm

3 cuka.

Terangkan jawapan anda.

………………………………………………………………………………

………………………………………………………………………………


4(e)

For

Examiner’s

Use

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CONFIDENTIAL

5 In an experiment, 50.0 cm3 of hydrogen peroxide solution is mixed with 1.0 g of

manganese(IV) oxide powder. The total volume of oxygen gas liberated is

measured at 30 seconds intervals.

Table 5 shows the result of the experiment.

Dalam satu eksperimen, 50.0 cm3 larutan hydrogen peroksida di campurkan dengan 1.0g serbuk

mangan(IV) oksida. Jumlah isipadu gas oksigen yang dibebaskan diukur setiap 30 saat.

Jadual 5 menunjukkan keputusan ekperimen.

Time (s) Masa (s) 0 30 60 90 120 150 180 210

Volume of oxygen (cm3)

Isipadu oksigen (cm3) 00.00 12.50 17.50 23.00 26.00 28.00 30.00 30.00

Table 5 Jadual 5

(a) What is the function of manganese(IV) oxide? Apakah fungsi mangan(IV) oksida?

………………………………………………………………………………

[1 mark] [1 markah]

(b) Write a balanced chemical equation for the decomposition of hydrogen

peroxide. Tulis persamaan kimia seimbang bagi penguraian hidrogen peroksida.

………………………………………………………………………………

[1 mark] [1 markah]

(c) Plot a graph of the volume of oxygen gas against time on page 13. Plotkan graf isipadu gas oksigen melawan masa pada muka surat 13.


(d) How long does it take for the decomposition of hydrogen peroxide to be

completed? Berapa lamakah masa yang diambil untuk penguraian lengkap hidrogen peroksida?

………………………………………………………………………………

[1 mark] [1 markah]

5(b)

5(d)

For

Examiner’s

Use

5(a)

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CONFIDENTIAL

Graph of the volume of oxygen gas against time Graf isipadu gas oksigen melawan masa

5(c)

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CONFIDENTIAL

(e) From the graph obtained in (c), calculate: Daripada graf yang diperolehi dalam (c), hitungkan ;

(i) the instantaneous rate of reaction at 30th

second. kadar tindak balas pada saat ke 30


(ii) the average rate of reaction for the first 90 seconds kadar tindak balas purata untuk 90 minit pertama

[1 mark] [1 markah]

(f) The experiment is repeated using 2.0 g of manganese(IV) oxide. The

reaction stops at 120 seconds.

Explain. Eksperimen diulangi menggunakan 2.0 g mangan(IV) oksida. Tindak balas berhenti pada

120 saat.

Terangkan.

………………………………………………………………………………

………………………………………………………………………………

………………………………………………………………………………


For

Examiner’s

Use

5(e)(ii)

5(f)

5(e)(i)

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CONFIDENTIAL

6 Diagram 6 shows the apparatus set-up to determine the heat of displacement of

copper from its salt solution by lead powder. Rajah 6 menunjukkan susunan radas untuk menentukan haba penyesaran kuprum daripada

larutan garamnya oleh serbuk plumbum.

Diagram 6 Rajah 6

50 cm3 of 0.2 mol dm

-3 copper(II) sulphate is poured into a polystyrene cup. The

initial temperature of the solution is recorded.

Excess lead powder is added into the copper(II) sulphate solution, stirred and the

maximum temperature is recorded.

Table 6 shows the result of the experiment.

50 cm3 larutan kuprum(II) sulfat 0.2 mol dm

-3 dimasukkan ke dalam sebuah cawan polistirena.

Suhu awal larutan direkodkan.

Serbuk plumbum berlebihan ditambah ke dalam larutan kuprum(II) sulfat, campuran dikacau dan

suhu tertinggi larutan direkodkan..

Jadual 6 menunjukkan keputusan eksperimen

Initial temperature / oC

Suhu awal 28.0

Maximum temperature / oC

Suhu tertinggi 33.0

Jadual 6 Table 6

(a) Give one suggestion on how the above apparatus can be improved to get a

better result. Berikan satu cadangan bagaimana radas di atas dapat diperbaiki untuk mendapatkan

keputusan yang lebih baik.

………………………………………………………………………………

[1 mark] [1 markah]

For

Examiner’s

Use

6(a)

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CONFIDENTIAL

(b) What is meant by the heat of displacement of copper by lead? Apakah yang dimaksudkan dengan haba penyesaran kuprum oleh plumbum?

………………………………………………………………………………

………………………………………………………………………………

[1 mark] [1 markah]

(c) Write the ionic equation for the reaction. Tuliskan persamaan ion bagi tindak balas tersebut..

………………………………………………………………………………

[1 mark] [1 markah]

(d) (i) Calculate the number of moles of copper(II) ions reacted. Hitung bilangan mol ion kuprum(II) yang disesarkan..

[1 mark] [1 markah]

(ii) Calculate the amount of heat released in the experiment.

[Density of solution = 1.0 g cm-3

and specific heat capacity of

water = 4.2 J g-1o

C-1

] Hitung jumlah haba yang dibebaskan dalam eksperimen..

[ Ketumpatan larutan = 1.0 g cm 3 dan

muatan haba tentu larutan air = 4.2J g-1

oC

-1]

[1 mark]

[1 markah]

For

Examiner’s

Use

6(b)

6(c)

6(d)(i)

6(d)(ii)

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CONFIDENTIAL

(iii) Calculate the heat of displacement of copper by lead. Hitung haba penyesaran bagi kuprum oleh plumbum.

[1 mark] [1 markah]

(e) Draw the energy level diagram for the reaction. Lukis gambar rajah aras tenaga bagi tindak balas.


(f) What happens to the temperature change if lead powder is replaced by

magnesium powder?

Explain. Apakah berlaku kepada perubahan suhu jika serbuk plumbum digantikan dengan serbuk

magnesium?

Terangkan.

………………………………………………………………………………

………………………………………………………………………………

………………………………………………………………………………


For

Examiner’s

Use

6(d)(iii)

6(e)

6(f)

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CONFIDENTIAL

Section B Bahagian B

[20 marks]

[20 markah]

Answer any one question from this section. Jawab mana-mana satu soalan daripada bahagian ini..

7 (a) Diagram 7.1 shows the position of chlorine and iodine in the Periodic

Table of Elements. Rajah 7.1 menunjukkan kedudukan klorin dan iodin di dalam Jadual Berkala Unsur.

Cl

I


Which group does these elements belongs to?

Explain why chlorine is more reactive than iodine.

Dalam kumpulan manakah unsur ini terletak?

Terangkan mengapa klorin lebih reaktif berbanding iodin?


(b) Diagram 7.2 shows the reaction between potassium with water. The

experiment is repeated using sodium to replace potassium.

Observations are recorded in Table 7.1

Rajah 7.2 menunjukkan tindak balas antara kalium dengan air. Eksperimen di ulangi

menggunakan natrium menggantikan kalium.

Permerhatian dicatatkan di dalam jadual 7.1

Diagram 7.2

Rajah 7.2

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CONFIDENTIAL

Element Unsur

Proton

number Nombor proton

Observation Pemerhatian

Potassium Kalium

19

Metal moves very vigorously on the surface of

water.

Colourless solution formed and changed red litmus

paper blue. Bergerak sangat cergas di permukaan air.

Larutan tanpa warna yang terhasil menukarkan warna

kertaslitmus merah kepada biru

Sodium Natrium

11

Metal moves vigorously on the surface of water

with a „hissing‟ sound.

Colourless solution is formed and changed red

litmus paper blue. Bergerak cergas di permukaan air dengan bunyi ‘hiss’.

Larutan tanpa warna terbentuk menukarkan kertas litmus

merah kepada biru

Table 7.1

Jadual 7.1

(i) Based on the proton number, explain why both elements show

similar chemical properties. Berdasarkan nombor proton, terangkan mengapa kedua-dua unsur menunjukkan

sifat kimia yang sama.


(ii) Write a balanced chemical equation for the reaction between

potassium and water. Tulis persamaan kima seimbang untuk tindak balas kalium dan air.


(iii) Describe briefly why the solutions obtained in both reactions turns

red litmus paper blue. Terangkan secara ringkas mengapa larutan yang diperolehi menukarkan kertas

litmus merah kepada biru.

[2 marks]

[2 markah]

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CONFIDENTIAL

(c) Table 7.2 shows the proton number of four elements. Jadual 7.2 menunjukkan bilangan proton bagi empat unsur..

Element Unsur

Proton Number Bilangan proton

C 6

Na 11

O 8

Table 7.2 Jadual 7.2

Explain how bonds are formed when:

Terangkan bagaimana ikatan terbentuk apabila:

(i) Na reacts with O to form a compound P. Na bertindak balas dengan O membentuk sebatian P.

(ii) C reacts with O to form a compound Q. C bertindak balas dengan O membentuk sebatian Q.

Your answer must include diagrams showing the electron arrangement of

compounds P and Q. Jawapan anda mesti termasuk gambar rajah yang menunjukkan susunan electron bagi

sebatian P dan Q.


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CONFIDENTIAL

8 (a) Diagram 8 shows the structural formula of chloroethene or vinyl chloride. Rajah 8 menunjukkan formula struktur bagi kloroetena atau vinil klorida.

Diagram 8 Rajah 8

(i) Vinyl chloride can undergo polymerization. Suggest a name for the

polymer formed and write a chemical equation for the reaction.

Vinil klorida boleh mengalami pempolimeran. Cadangkan satu nama bagi

polimer terbentuk dan tulis persamaan kimia untuk tindak balas

tersebut.


(ii) Discuss the following statement: Bincang kenyataan berikut:


(b) Ammonia and sulphuric acid are two important chemicals produced in

chemical industries.

Ammonia gas reacts with aqueous sulphuric acid to form a nitrogenous

fertilizer as shown in the equation.

Ammonia dan asid sulfurik adalah dua bahan kimia penting dihasilkan oleh industri

kimia.

Gas ammonia bertindak balas dengan asid sulfurik membentuk baja bernitrogen seperti

yang ditunjukkan oleh persamaan.

2NH3 + H2SO4 → (NH4)2 SO4

Calculate the mass of ammonium sulphate produced when an excess

ammonia gas is passed into 100 cm3 of 2.0 mol dm

-3 of aqueous sulphuric

acid solution.

[Molar mass of ammonium sulphate = 132 g mol-1

]

Hitung jisim ammonium sulfat dihasilkan apabila gas ammonia berlebihan dialirkan ke

dalam 100 cm3 asid sulfurik 2.0 mol dm

-3.

[Jisim molekul relatif ammonium sulfat = 132 g mol-1

]

[3 marks]

[3 markah]

H H

│ │

C = C

│ │

H Cl

The usage of synthetic polymer causes environmental pollution.

Kegunaan polimer sintetik menyebabkan pencemaran alam sekitar

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(c) “Pure aluminium rod is malleable while duralumin which is made of 95%

aluminium and 5% copper is not”.

Explain how the difference in the composition contributes to the difference in

properties of aluminium and duralumin.

“Rod aluminium tulen mudah dibengkokkan tetapi duralumin yang dibuat daripada 95%

aluminium dan 5% kuprum sukar dibengkokkan”

Terangkan bagaimana perbezaan komposisi membezakan sifat aluminium dan duralumin.


(d) The equation below shows the ionization of a sodium soap molecule in water. Persamaan di bawah menunjukkan pengionan molekul sabun natrium di dalam air.

Soap becomes less effective when the cleaning is carried out in acidic water.

Explain. Sabun menjadi kurang berkesan apabila pencucian menggunakan air berasid. Terangkan.


(e) Amphicillin is an antibiotic. Patients are advised to finish the whole course of

antibiotic prescribed even though he/she has recovered from the sickness.

Explain.

Ampisilin adalah antibiotik. Pesakit dinasihatkan untuk menghabiskan ubat tersebut

walaupun penyakitnya sudah sembuh.

Terangkan.


(f) The structural formula of aspirin is shown below. Formula struktur aspirin ditunjukkan di bawah.

Explain why aspirin is not advisable to be prescribed to patient with gastric

problem. Terangkan mengapa aspirin tidak digalakkan kepada pesakit yang mengalami penyakit

gastrik.


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Section C Bahagian C

[20 marks]

[20 markah]

Answer any one question from this section Jawab mana-mana satu soalan.daripada bahagian ini.

9 (a) Tin (stanum) is used to electroplate food can in industries.

Explain why food in a dented can should not be consumed.

Stanum digunakan untuk menyadur tin makanan dalam industri.

Terangkan mengapa makanan dalam tin yang kemek tidak boleh dimakan.


(b) Diagram 9 shows two electrolytic cells using different electrodes.

Rajah 9 menunjukkan dua sel elektrolisis menggunakan elektrod berbeza.

Cell I Cell II Sel 1 Sel II


Compare and contrast Cell I and Cell II.

Your answer should include observation and half equation for the reaction

at both electrodes.

Bandingbezakan Sel I dan Sel II.

Jawapan anda mesti mengandungi pemerhatian dan setengah persamaan bagi tindak

balas yang berlaku di kedua-dua elektrod .

[6 marks]

[6 markah]

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(c) Based on the above statement, describe an experiment to verify the

reaction that occured is a redox reaction.

Berdasarkan kenyataan di atas, huraikan satu eksperimen untuk membuktikan tindak

balas yang berlaku merupakan tindak balas redoks.

In your description, include Penerangan anda mestilah mengandungi

Procedure

Prosedur

Confirmatory test Ujian pengesahan

Explanation on oxidation and reduction processes

Penerangan tentang proses pengoksidaan dan penurunan

Ionic equation

Persamaan ion


The displacement of iodine, I2 from potassium iodide, KI solution

is a redox reaction

Penyesaran iodin,I2 daripada larutan kalium iodida, KI

adalah tindak balas redoks

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10 (a) Methanoic acid is used in rubber industries to coagulate latex.

It reacts with magnesium according to the following equation: Asid metanoik digunakan dalam industri getah untuk membekukan lateks. Asid ini

bertindak balas dengan magnesium mengikut persamaan berikut:

2 HCOOH + Mg → (HCOO)2Mg + H2

[Relative Atomic Mass: C=12; O=16; H=1;

molar volume of gas at room temperature and pressure is 24 dm3 mol

-1 ]

[Jisim atom relatif: C;12, O;16, H;1. isipadu molar sebarang gas pada suhu dan tekanan

bilik adalah 24 dm3 mol

-1]

(i) Calculate the maximum volume of hydrogen gas released if 50 cm3

of 0.2 mol dm-3

methanoic acid is reacted with 5 g magnesium. Hitung isipadu maksima gas hidrogen yang terbebas jika 50 cm

3 asid metanoik

0.2 mol dm-3

bertindak balas dengan 5 g serbuk magnesium. [3 marks] [3 markah]

(ii) A sweet smelling substance is formed when methanoic acid is

reacted with ethanol, C2H5OH.

Name the substance and draw the structural formula. Apabila asid metanoik bertindak balas dengan etanol, C2H5OH membentuk

ester.

Namakan dan lukis formula struktur ester tersebut [2 marks]

[2 markah]

(b) Natural rubber is obtained from rubber tree as shown in Diagram 10.1.

Aeroplane tyres as shown in Diagram 10.2 are produced by vulcanizing

the natural rubber.

Compare the following properties between natural rubber and vulcanized

rubber

Elasticity

Heat resistance

Explain the differences Getah asli diperolehi dari pokok getah seperti ditunjukkan dalam Rajah 10.1. Tayar

kapalterbang seperti dalam Rajah 10.2 dihasilkan melalui penvukanan getah asli.

Bandingkan sifat berikut antara getah asli dan getah tervulkan.

Kekenyalan

Tahan haba

Terangkan perbezaan tersebut. [5 marks] [5 markah]

Diagram 10.1 Diagram 10.2

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(c) Alcohol can undergo dehydration process as follows: Alkohol boleh mengalami proses pendehidratan seperti berikut:

Describe a laboratory experiment to carry out the dehydration of a named

alcohol. Huraikan satu eksperimen untuk menjalankan proses pendehidratan bagi satu alkohol

yang dinamakan.

Your answer should include: Jawapan anda mesti mengandungi:

Procedure Prosedur

Equation Persamaan

Confirmation of product Pengesahan hasil


END OF QUESTION PAPER KERTAS SOALAN TAMAT

Hydrocarbon Hidrokarbon

Alcohol Alkohol


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INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON

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

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

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

spaces provided in the question paper. Jawab semua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yang

disediakan dalam kertas soalan.

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

your answers for Section B and Section C on the lined pages at the end of the

question paper. Answer questions in Section B and Section C in detail. You may

use equations, diagrams, tables, graphs and other suitable methods to explain your

answer. Jawap satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Tuliskan

jawapan bagi Bahagian B dan Bahagian C pada halaman bergaris di bahagian akhir kertas

soalan ini. Jawab Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakan

persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan

anda..

4. Show your working, it may help you to get marks. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah.

5. If you wish to cancel any answer, neatly cross out the answer. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.

6. The diagrams in the questions are not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.

7. Marks allocated for each question or part question are shown in brackets. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam

kurungan.

8. The time suggested to complete Section A is 90 minutes, Section B is 30 minutes

and Section C is 30 minutes Masa yang dicadangkan untuk menjawab Bahagian A ialah 90 minit, Bahagian B ialah 30 minit

dan Bahagian C ialah 30 minit.

9. You may use a non – programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

10. Hand in all your answer sheets at the end of the examination. Serahkan semua kertas jawapan anda di akhir peperiksaan.

4541/3©Copyright Reserve MARA

[See Next Page

Name : …….……………………………………...…….… Class : ……………..

CONFIDENTIAL

4541/3

Chemistry

Paper 3

September

2008

1½ hours

MAKTAB RENDAH SAINS MARA

SIJIL PELAJARAN MALAYSIA

TRIAL EXAMINATION

2008

CHEMISTRY

Paper 3

One hour and thirty minutes

DO NOT OPEN THIS QUESTION BOOKLET UNTIL BEING TOLD TO DO SO

For Examiner’s Use

Question Full

Mark Mark

1 33

2 17

Total 50

This question booklet contains 10 printed pages including the front page.

1. Write down your name and class in

the space provided Tuliskan nama dan kelas anda pada ruang

yang disediakan.

2. The question booklet is bilingual.

Buku soalan ini adalah dalam dwibahasa.

3. Candidates are required to read the

information at the back page of the

question booklet. Calon dikehendaki membaca maklumat di

halaman belakang kertas soalan ini.


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4541/3©Copyright Reserve MARA 2 [See Next Page

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1 An experiment was conducted to determine the position of different metals in

Electrochemical Series.

Diagram 1.1 shows the set-up of apparatus used and copper is the positive

terminal in all experiment. Satu eksperimen dijalankan untuk menentukan kedudukan logam berbeza dalam Siri

Elektrokimia.

Rajah 1.1 menunjukkan susunan radas yang digunakan dan kuprum adalah terminal positif

dalam semua eksperimen.


Experiment is repeated using different pairs of metals.

Diagram 1.2 shows the voltmeter reading for all experiments. Eksperimen diulangi menggunakan pasangan logam berbeza.

Rajah 1.2 menunjukkan bacaan voltmeter bagi semua eksperimen.

Mg / Cu

Reading:.......................... V Bacaan:

Fe / Cu

Reading:.......................... V Bacaan:

Zn / Cu

Reading:.......................... V Bacaan:

Pb / Cu

Reading:.......................... V Bacaan:


For

Examiner’s

Use

Copper Kuprum

Porous pot Pasu berliang

Magnesium

0.5 mol dm-3

copper(II) sulphate kuprum sulfat

0.5 mol dm-3

magnesium sulphate magnesium sulfat

Magnesium

1(a)

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(a) Record the voltmeter readings in the spaces provided. Catatkan bacaan voltmeter pada ruang yang disediakan.

(b) Construct a table and record the potential difference for each experiment. Bina sebuah jadual untuk menunjukkan beza keupayaan bagi setiap eksperimen .

(c) Complete the Table 1.1 based on the experiment Lengkapkan Jadual 1.1 berdasarkan eksperimen itu.

The way to manipulate

variable: Cara mengubah

pembolehubah

dimanipulasikan:

What to observe in the

responding variable: Apa yang diperhatikan dalam

pembolehubah bergerakbalas

The way to maintain the

controlled variable: Cara menetapkan

pembolehubah dimalar.

Table 1.1 Jadual 1.1

1(c)

For

Examiner’s

Use

1(b)

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(d) State the hypothesis for this experiment. Nyatakan hipotesis bagi eksperimen ini

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

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

(e) Cell in Diagram 1.1 is left for 5 minutes.

Complete the following Table by stating the observations and related

inferences in the experiment. Sel dalam Rajah 1.1 dibiarkan selama 5 minit.

Lengkapkan Jadual berikut dengan menyatakan pemerhatian dan inferens yang

berkaitan dalam eksperimen tersebut.

Observations Pemerhatian

Inferences Inferens

(f) Based on the observations, arrange all the metals in ascending order of their

electropositivity Berdasarkan pemerhatian, susun kesemua logam itu mengikut tertib menaik

keelektropositifan

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

(g) Based on the cell in Diagram 1.1, classify the ions present in both

solutions into cations and anions. Berdasarkan sel dalam Rajah 1.1 kelaskan ion-ion yang terdapat dalam kedua-dua

larutan kepada kation dan anion.

1(d)

1(f)

For

Examiner’s

Use

1(g)

1(e)

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(h) State the operational definition of a chemical cell. Nyatakan definisi secara operasi bagi sel kimia

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

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

(i) A potential difference of 1.5 V is observed when the experiment is

repeated by using an unknown metal, R and copper.

Predict the position of metal R in the Electrochemical Series. Beza keupayaan sebanyak 1.5 V dihasilkan apabila eksperimen diulangi menggunakan

suatu logam yang tidak diketahui , R dan kuprum.

Ramalkan kedudukan logam R dalam Siri Elektrokimia.

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

(j) If cell using Zn/Cu is left for 2 hours, state the colour change of copper(II)

sulphate solution. Sekiranya sel menggunakan Zn/Cu dibiarkan selama 2 jam, nyatakan perubahan warna

larutan kuprum(II) sulfat.

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

1(h)

1(i)

1(j)

For

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Use

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2 Diagram 2.1 shows two types of bonfire using sticks and logs. Rajah 2.1 menunjukkan 2 jenis unggun api menggunakan ranting kayu dan batang kayu.

During camping, a group of students discovered that it is easier to start a bonfire

using sticks rather than logs. This is due to the differences in the size Semasa berkhemah, sekumpulan pelajar telah mendapati bahawa lebih senang untuk

menghidupkan unggun api menggunakan ranting kayu berbanding batang kayu. Ini disebabkan

oleh perbezaan saiz.

Bonfire using sticks Unggun api menggunakan ranting

Bonfire using logs Unggun api menggunakan batang kayu


Referring to the above situation, plan a laboratory experiment to investigate the

effect of size of reactant on the rate of reaction between calcium carbonate and an

acid. Merujuk kepada situasi di atas, rancangkan satu eksperimen dalam makmal untuk mengkaji

kesan saiz bahan tindak balas terhadap kadar tindak balas antara kalsium karbonat dengan asid.

Your planning should include the following: Perancangan anda haruslah mengandungi perkara-perkara berikut :

(i) Statement of Problem

Pernyataan masalah

(ii) All the variables Semua pembolehubah

(iii) Statement of hypothesis Pernyataan hipotesis

(iv) List of substances and apparatus

Senarai bahan dan alat radas

(v) Procedure of the experiment Prosedur eksperimen

(vi) Tabulation of data Penjadualan data

[17 marks]

END OF QUESTION PAPER [Kertas Soalan Tamat]


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INFORMATION FOR CANDIDATES

MAKLUMAT UNTUK CALON

1. This question paper consists of two questions. Answer all questions. Kertas soalan ini mengandungi dua soalan. Jawab semua soalan

2. Write your answers for Question 1 in the spaces provided in the question paper. Tuliskan jawapan bagi Soalan 1 dalam ruang yang disediakan dalam kertas soalan.

3. Write your answers for Question 2 on the lined pages at the end of the question

paper in detail. Tuliskan jawapan bagi Soalan 2 pada halaman bergaris di bahagian akhir kertas soalan ini

dengan terperinci

4. Show your working, it may help you to get marks. Tunjukkan cara mengira kerana ia boleh membantu anda mendapatkan markah.

5. If you wish to cancel any answer, neatly cross out the answer. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.

6. The diagrams in the questions are not drawn to scale unless stated. Rajah yang terdapat dalam soalan tidak dilukis mengikut skala kecuali dinyatakan sebaliknya

7. Marks allocated for each question or part of the question are shown in brackets. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan.

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

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

9. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak diprogramkan.

10. Hand in all your answer sheets at the end of the examination. Serahkan semua kertas jawapan anda di akhir peperiksaan.

Marks awarded Pemberian markah

Score

Skor

Description

Penerangan

3 Excellent : The best response Cemerlang : Respons yang paling baik

2 Satisfactory : An average response Memuaskan : Respons yang sederhana

1 Weak : An inaccurate response Lemah : Respons yang kurang tepat

0 No response or wrong response Tiada respons atau respons yang salah

Education

Kimia MRSM SPM 2008