Spm Percubaan 2008 Mrsm Chemistry Paper 1

CONFIDENTIAL 4541/1 Chemistry Paper 1 September 2008 1 ¼ hour SPM TRIAL EXAMINATION 2008 MARA JUNIOR SCIENCE COLLEGE

CHEMISTRY Paper 1 One hour and fifteen minutes

DO NOT OPEN THE QUESTION BOOKLET UNTIL BEING TOLD TO DO SO. 1.

The question booklet is bilingual. Kertas soalan ini adalah dalam dwibahasa.

2.

Candidates are advised to read information on the back page of the question booklet. Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.

This question booklet has 30 printed pages

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1

Diagram 1 shows the inter conversion of water, steam and ice. In which conversion do H2O molecules lose speed? Rajah 1 menunjukkan perubahan keadaan air, ais dan stim. Dalam perubahan manakah molekul H2O hilang kelajuan?

Steam Stim

Ice

Water

Ais

Air

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 B C D 3

HNO3 H2O LiF ZnSO4

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

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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.

Nucleon number Nombor nukleon

Proton number Nombor proton

W

X

Y

Z

35

37

40

39

17

17

18

19

Table 1 Jadual 1

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

5

A

1

B

2

C

3

D

4

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

Bulb Mentol

Electrodes

Substance G

Elektrod

Bahan G

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

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In which experiment the limewater does not turn cloudy? Dalam eksperimen manakah air kapur tidak menjadi keruh? A

B

C

D

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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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?

A B C D

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Aeroplane

Car

Wheelbarrow

Kapalterbang

Kereta

Kereta sorong

Magnalium

Brass

Steel

Magnalium

Loyang

Keluli

Duralumin

Steel

Steel

Duralumin

Keluli

Keluli

Pewter

Bronze

Brass

Pewter

Gangsa

Loyang

Steel

Stainless steel

Solder

Keluli

Keluli nirkarat

Pateri

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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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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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 cm3 asid hidroklorik dalam empat tabung uji berlainan. Dalam tabung uji manakah menghasilkan tindak balas paling cergas?

A

B

C 14

D

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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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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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?

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Hydrogen

Metal oxide

Hidrogen

Logam oksida

A

Oxidised

Oxidised

Dioksidakan

Dioksidakan

B

Reduced

Oxidised

Diturunkan

Dioksidakan

C

Reduced

Reduced

Diturunkan

Diturunkan

D

Oxidised

Reduced

Dioksidakan

Diturunkan

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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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

Neutralisation

Eksotermik

Peneutralan

A





B



C



D

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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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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 J

Melting point(oC) Takat lebur(0C) -160

Boiling point(oC) Takat didih(oC) -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

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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?

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r

s

A

1

3

B

1

5

C

3

4

D

3

8

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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

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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?

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Carbon

Hydrogen

Oxygen

Karbon

Hidrogen

Oksigen

A

1

6

2

B

2

5

1

C

2

6

1

D

6

2

1

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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 Elektrod T

Electrode N 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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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

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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 B C D 4541/1

NH4 + (aq) Al3+ (aq) NO3- (aq) SO42- (aq)

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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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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)?

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A

C2H5COOC2H5

B

C3H7COOC2H5

C

C3H7COOCH3

D

CH3COOC3H7

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 25 oC.

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

Increase temperature Penambahan suhu

Penambahan kepekatan asid

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Amount of product Kuantiti hasil

A

Increase rate of reaction

Increase rate of reaction

Kadar tindak balas bertambah

Kadar tindak balas bertambah

B

Decrease rate of reaction

Decrease rate of reaction

Increase

Kadar tindak balas berkurang

Kadar tindak balas berkurang

Bertambah

C

Decrease rate of reaction

Increase rate of reaction

Decrease

Kadar tindak balas berkurang

Kadar tindak balas bertambah

Berkurang

D

Increase rate of reaction

Decrease rate of reaction

Increase

Kadar tindak balas bertambah

Kadar tindak balas berkurang

Bertambah

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no change Tidak berubah

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

Water out Air keluar

Water in Air masuk

Ethanol with acidified potassium dichromate Air

Campuran etanol dan kalium dikromat berasid

Heat Haba

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

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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

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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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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?

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Barium chloride

Barium sulphate

Barium klorida

Barium sulfat

A

Crystallisation

Crystallisation

Penghabluran

Penghabluran

B

Crystallisation

Filtration

Penghabluran

Penurasan

C

Filtration

Crystallisation

Penurasan

Penghabluran

D

Filtration

Filtration

Penurasan

Penurasan

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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?

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A

C2 H4

B

C2 H6

C

C4 H8

D

C H3OH

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 Fe3+ + Mn2+ + 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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Table 3 describes the structures of four particles. Jadual 3 menunjukkan struktur bagi empat zarah.

Number of protons

Number of neutrons

Bilangan proton

Bilangan neutron

O

8

8

8

O 2-

8

8

P

Na

11

Q

11

Na+

11

12

R

Particle Zarah

Number of electrons Bilangan elektron

Table 3 Jadual 3

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

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P

Q

R

A

9

11

10

B

9

11

11

C

10

12

10

D

10

12

11

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

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M

A

Bromine

Iodine

Bromin

Iodin

B

Iodine

Bromine

Iodin

Bromin

C

Sodium Natrium

Kalium

D

Potassium

Sodium

Kalium

Natrium

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Potassium

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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

Electrical conductivity

Bahan

Kekonduksian elektrik

R

Does not conduct under any conditions

T

Conducts only in aqueous solution

U

Conducts in molten and solid state

W

Conducts in molten state and aqueous solution

Tidak mengalirkan arus elektrik dalam semua keadaan

Mengalirkan arus elektrik dalam keadaan berair sahaja

Mengalirkan arus elektrik dalam keadaan leburan dan pepejal

Mengalirkan arus elektrik dalam keadaan leburan dan larutan berair

Table 4 Jadual 4

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

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R

T

U

W

A

Pb

HCl

NaCl

S

B

S

HCl

NaCl

Pb

C

S

HCl

Pb

NaCl

D

S

NaCl

HCl

Pb

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?

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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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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?

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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 Panaskan

Diagram 23 Rajah 23

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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?

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A

0.4 cm3/ s

B

2.5 cm3/ s

C

4.0 cm3/ s

D

40.0 cm3/ s

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

Compound J Sebatian J

Excess HNO3 HNO3 berlebihan

Gas

Colourless solution

+

Larutan tanpa warna

Excess NaOH NaOH berlebihan

White precipitate in excess NaOH Mendakan putih dalam 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

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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?

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A

B

C

D

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46

Ethene reacts with steam in the presence of a suitable catalyst. What is the structural formula of the compound formed? Etena akan bertindak balas dengan stim dalam kehadiran mangkin yang sesuai. Apakah formula struktur bagi sebatian yang terbentuk?

47

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

Diagram 25 Rajah 25

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

A B C D

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Carbon

Copper

Karbon

Kuprum

Decrease

Decrease

Berkurangan

Berkurangan

Decrease

Increase

Berkurangan

Bertambah

Increase

Decrease

Bertambah

Berkurangan

Increase

Increase

Bertambah

Bertambah

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48

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

Halide solution Larutan halida

Experiment

Halogen added

Eksperimen

Halogen ditambah

X-

Y-

Z-

I

X2

-

Y2 produced

Z2 produced

Y2 dihasilkan

Z2 dihasilkan

II

Y2

No reaction

-

III

Z2

Tiada perubahan

No reaction Tiada perubahan

No reaction

Y2 produced

Tiada perubahan

Y2 dihasilkan

-

Table 5 Jadual 5

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

A B C D 49

X

Y

Z

Br Br Cl Cl

Cl I I Br

I Cl Br I

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

Mg(s) + Fe2+ (aq) → Mg2+ (aq) + Fe(s)

= -189 kJ mol

1

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

I

Magnesium is oxidized Magnesium dioksidakan

II

Reaction is exothermic Tindak balas adalah eksotermik

III

The temperature decreases Suhu berkurangan

IV

The heat released by reacting 0.2 mole of ferum(II) ions is 37.8 kJ Haba yang dibebaskan semasa 0.2 mol ion ferum(II) bertindak balas ialah 37.8 kJ mol -1.

A

I and II only I dan II sahaja

B

II and IV only II dan IV sahaja

C

III and IV only III dan IV sahaja

D

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

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50

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

2 Zn(NO3)2 → 2 ZnO + 4 NO2 + O2 Which of the following will be produced when 18.9 g of zinc nitrate is heated? [Molar mass Zn(NO3)2 = 189 gmol-1 , molar mass zinc oxide = 81 gmol-1 and 1 mol of gas occupies a volume of 24 dm3 at room temperature and pressure] Antara berikut yang manakah akan terhasil jika 18.9 g zink nitrat dipanaskan? [Jisim molar: Zn(NO3)2 =189 gmol-1 , molar mass ZnO = 81 gmol-1 dan 1 mol gas menempati isipadu sebanyak 24 dm3 pada suhu dan tekanan bilik]

A

4.8 dm3 nitrogen dioxide gas 4.8 dm3 gas nitrogen dioksida

B

0.04 mol of oxygen gas 0.04 mol of gas oksigen

C

7.1 g zinc oxide 7.1 g zink oksida

D

2.4 dm3 oxygen gas 2.4 dm3 gas oksigen

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INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON 1.

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

2.

Answer all questions. Jawab semua soalan

3.

Each question is followed by four alternative answers A, B, C and D. For each question, choose one answer only. Blacken your answer on the objective answer sheet provided. Tiap-tiap soalan di ikuti oleh empat pilihan jawapan, iaitu A, B, C dan D. Bagi setiap soalan, pilih satu jawapan sahaja. Hitamkan jawapan anda pada kertas jawapan objektif yang disediakan.

4.

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

5.

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

6.

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

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