p1 oti 1 tg 5 chemistry 2011

8/13/2019 p1 Oti 1 Tg 5 Chemistry 2011

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SULIT

4541/1

Chemistry

Kertas 1

2010

1 jam

PEPERIKSAAN OTI 1

SIJIL PELAJARAN MALAYSIA 2011

TINGKATAN 5

PANITIA KIMIA

SEKOLAH MENENGAH KEBANGSAAN KUALA PERLIS

02000 KUALA PERLIS,PERLIS__________________________________________________________________________________

CHEMISTRY

Kertas 1Satu jam dan lima belas minit

__________________________________________________________________________________JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Kertas soalan ini mengandungi 32 halaman bercetak

Disediakan oleh: Jaaizah bt Jaafar .....................................................................................

Guru Mata pelajaran

Disemak oleh: Lim Kuok Chen ........................................................................................

Ketua Panitia kimia

1. Kertas soalan ini adalah dalam dwibahasa

2. Soalan dalam bahasa Inggeris mendahului soalan yang sepadan dalam bahasaMelayu

3. Calon dikehendaki membaca maklumat di halaman belakang kertas soalan ini.


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1. Diagram 1 shows the set-up of the apparatus for electrolysis.

Rajah 1 menunjukkan susunan radas yang digunakan dalam proses elektrolisis.

Diagram 1

Rajah 1

Which of the following compounds could be used as an electrolyte?

Antara sebatian berikut yang manakah boleh digunakan sebagai elektrolit?

A. Ethanol

Etanol

B. Kerosene

Kerosin

C. Ethyl ethanoateEtil etanoat

D. Ethanoic acid

Asid etanoik

2. Which of the following statements is true about bases?

Antara pernyataan berikut, yang manakah benar tentang bes?

A. React with acids

Bertindak balas dengan asid

B. Dissolve in water

Larut dalam air

C. Contain hydroxide ions

Mengandungi ion-ion hidroksida

D. Have alkaline properties

Mempunyai sifat alkali


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3. Diagram 2 shows the set-up of the apparatus of an experiment.

Rajah 2 menunjukkan susunan radas bagi satu eksperimen.

Diagram 2

Rajah 2

What is the process shown in Diagram 2?

Apakah proses yang ditunjukkan dalam Rajah 2?

A. Preparation of insoluble salt

Penyediaan garam tak terlarutkan

B. Preparation of soluble salt

Penyediaan garam terlarutkanC. Purification of insoluble salt

Penulenan garam tak terlarutkan

D. Purification of soluble salt

Penulenan garam terlarutkan

4. Which of the following ions form a white precipitate that dissolves in excess sodium

hydroxide solution?

Antara ion-ion berikut yang manakah membentuk mendakan putih yang larut dalam

larutan natrium hdroksida berlebihan?

I. Al 3

II. Mg 2

III. Pb 2

IV. Zn 2

Lead II nitrate solution


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A. I and II only

I dan II sahaja

B. II and IV only

II dan IV sahaja

C. I, II and III onlyI,II dan III sahaja

D. I, III and IV only

I, III dan IV sahaja

5. Which of the following shows the arrangement of atoms in an alloy?

Antara berikut, yang manakah menunjukkan susunan atom dalam suatu aloi?

6. The flow chart shows the stages in the production of sulphuric acid using the Contact

process.

Carta alir menunjukkan peringkat-peringkat dalam pembuatan asid sulfurikmenggunakan proses Sentuh.

Sulphur Sulphur Concentrated Substance Sulphuric

Sulphur O2 dioxide O2 trioxide sulphuric acid Oleum X acid

Sulfur Sulfur Sulfur Asid sulfurik Oleum Bahan Asid

dioksida trioksida pekat X Sulfurik

What is subst ance X?

Apakah bahan X?

A. Water

Air

B. Sulphur

Sulfur

C. Oxygen

Oksigen

D. Sulphur dioxide

Sulfur dioksida


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7. Diagram 3 shows the effect of a weight that is dropped onto a composite substance and

its original component.

Rajah 3 menunjukkan kesan satu beban yang dijatuhkan ke atas bahan komposit dan

komponen asalnya.

Diagram 3

Rajah 3

What is the characteristic of the composite substance?

Apakah sifat yang dimiliki oleh bahan komposit itu?

A. Strong and hard

Kuat dan keras

B. Strong and elasticKuat dan Kenyal

C. Hard and ductile

Keras dan mulur

D. Elastic and ductile

Kenyal dan mulur


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8. Diagram 4 shows porcelain pots.

Rajah 4 menunjukkan pasu porselin.

Diagram 4

Rajah 4

What is the substance and the major component used in the making of porcelain pots?

Apakah bahan dan komponen utama untuk membuat pasu porselin?

Substance

Bahan

Major component

Komp onen utama

A Glass

Kaca

Cupronickel

Kupronikel

B Ceramic

Seramik

Aluminium silicate

Aluminium silikat

C Polymer

Polimer

Silicon dioxide

Silikon dioksida

D AlloyAloi

Iron(II) oxideFerum (II) oksida

9. Which of the following explains the meaning of effective collision?

Antara pernyataan berikut, yang manakah menjelaskan maksud perlanggaran

berkesan?

A. The collision where its energy is less than the activation energy

Perlanggaran yang tenaganya kurang daripada tenaga pengaktifan

B. The collision that has a low energyPerlanggaran yang berlaku mempunyai tenaga yang rendah

C. The collision which takes place before a reaction

Perlanggaran yang berlaku sebelum sesuatu tindak balas

D. The collision that causes a reaction

Perlanggaran yang menghasilkan tindak balas


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10 Which of the following reactions absorbs heat from the surroundings?Antara tindak balas berikut, yang manakah menyerap haba daripada persekitaran?

A Adding zinc to nitric acidMenambahkan zink pada asid nitrik

B Dissolving ammonium nitrate in waterMelarutkan ammonium nitrat dalam air

C Dissolving copper(II) sulphate in waterMelarutkan kuprum(II) sulfat dalam air

D Adding sodium hydroxide solution to sulfuric acidMenambahkan larutan natrium hidroksida pada asid sulfurik

11 Which of the following is a fast reaction?Antara berikut, yang manakah merupakan tindak balas yang cepat?

A RustingPengaratan

B PrecipitationPemendakan

C FermentationPenapaian

D PhotosynthesisFotosintesis

12 Which of the following is an insoluble salt?Antara yang berikut, manakah merupakan garam tak larut?

A Calcium nitrateKalsium nitrat

B Potassium nitrateKalium nitrat

C Calcium carbonate

Kalsium karbonat

D Potassium carbonateKalium karbonat


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13 Which of the following mixtures of elements form alloy to make the twenty cents coins?Antara campuran unsur yang membentuk aloi berikut, manakah boleh dibuat duit syiling dua puluhsen?

A Iron and carbonFerum dan karbon

B Copper and nickelKuprum dan nikel

C Stanum and copperTimah dan kuprum

D Aluminium and copperAluminium dan kuprum

14 The diagram shows the set up of the apparatus for the electrolysis of copper(II) nitratesolution.Rajah menunjukkan susunan radas bagi elektrolisis larutan kuprum(II) nitrat.

Which of the following is produced at copper electrode X?Antara berikut, yang manakah dihasilkan di elektrod kuprum X?

A CopperKuprum

B OxygenOksigen

C Hydrogen ionsIon hidrogen

D Copper(II) ionIon kuprum(II)


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15 The diagram shows the set up of the apparatus of a simple chemical cell.Rajah menunjukkan susunan radas bagi sel kimia ringkas.

Which of the following is metal X?Antara berikut, yang manakah logam X?

A ZincZink

B Lead

Plumbum

C MagnesiumMagnesium

D AluminiumAluminium

16 Zinc chloride solution and aluminium chloride solution are colourless solutions.Which of the following can be used to differentiate the solutions?

Larutan zink klorida dan larutan aluminium klorida adalah larutan tidak berwarna.

Antara berikut, yang manakah boleh digunakan untuk membezakan larutan-larutan tersebut?

A Ammonia solutionLarutan ammonia

B Barium nitrate solutionLarutan barium nitrat

C Silver nitrate solutionLarutan argentum nitrat

D Sodium hydroxide solutionLarutan natrium hidroksida


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17 The diagram shows four stages in the conversion of sulphur to sulphuric acid.Rajah menunjukkan empat peringkat dalam pertukaran sulfur kepada asid sulfurik.

In which stage is a catalyst used?Diperingkat manakah mangkin digunakan?

A Stage IPeringkat I

B Stage IIPeringkat II

C Stage IIIPeringkat III

D Stage IVPeringkat IV

Stage IV

Peringkat

IV

Stage II

Peringkat II

Stage III

Peringkat III

Sulphuric acid

Asid sulfurik

Stage I

Peringkat ISulphur

Sulfur

Sulphur dioxide

Sulfur dioksida

Sulphur trioxide

Sulfur trioksida

OleumSulphuric acid

Asid sulfuric


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18 Which of the following polymer is suitable for making water pipes?Antara polimer berikut, yang manakah sesuai bagi membuat paip air?

A

B

C

D


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19 The diagram shows an energy profile for a reaction which is represented by the followingequation:

Rajah menunjukkan profil tenaga bagi tindak balas yang diwakili oleh persamaan berikut:

R + S P + Q

What is the activation energy for this reaction?Apakah tenaga pengaktifan bagi tindak balas ini?

A

B

C

D

y kJ

x kJ

(y x) kJ

(x y) kJ

x kJ

y kJ

R + S

P + Q

Energy


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20 The diagram shows the energy level diagram for the decomposition of calcium carbonate.Rajah menunjukkan gambar rajah aras tenaga bagi penguraian kalsium karbonat.

Based on the energy level diagram, which of the following is true?Berdasarkan gambar rajah aras tenaga, manakah betul?

A The reaction is exothermicTindak balas adalah eksotermik

B The heat energy released is y kJTenaga haba yang dibebaskan ialah y kJ

C CaO(s) and CO2(g) contain more energy than the CaCO3(s)Kandungan tenaga CaO(s) and CO2(g) lebih daripada kandungan tenagaCaCO3(s)

D Heat absorbed during the breaking of bond in CaCO3is less than the heat releasedduring the formation of bond.Haba yang diserap semasa pemecahan ikatan dalam CaCO3adalah rendah daripada habayang dibebaskan semasa pembentukan ikatan

CaO(s)+ CO2(g)

CaCO3 (s)

Energy

Tenaga

H = + y kJmol-


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23 The table shows information about three simple chemical cells.Jadual menunjukkan maklumat tentang tiga sel kimia ringkas

Pair of metalsPasangan logam

Potential difference/VBeza up aya/V

Metal of negativeterminal

Logam terminal negat i f

P and copperP dan kuprum 0.45 P

Q and copperQ dan kuprum 1.30 Q

R and copperR dan kuprum 0.56 Cu

Based on the information in the table, what is the potential difference of the pair of metalsQ and R?Berdasarkan maklumat dalam jadual, apakah beza upaya antara pasangan logam Q dan R?

A

B

C

D

0.74

0.85

1.01

1.86

24 A farmer discovered that his vegetables were not growing well because the soil was acidic.Which of the following substances can be used to overcome the problem?

Seorang petani mendapati sayurannya tidak tumbuh subur kerana tanahnya berasid. Antara bahanberikut, yang manakah boleh digunakan untuk menyelesaikan masalah tersebut?

A Zinc oxideZink oksida

B Calcium oxideKalsium oksida

C Sodium hydroxideSodium hidroksida

D Magnesium hydroxideMagnesium hidroksida


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25 The table shows the volume of oxygen gas released for the decomposition of hydrogenperoxide.

Jadual menunjukkan isipadu gas oksigen yang dibebaskan bagi penguraian hidrogen peroksida.

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

Volume of oxygen (cm3) 0.0 6.6 12.5 17.9 23.0 27.8 31.8 35.2

What is the average rate of reaction in the third minutes?Berapakah kadar tindak balas purata pada minit ke tiga?

A

B

C

D

0.11 cm3s-1

0.13 cm3s-1

0.15 cm3s-1

0.18 cm3s-1

26 In an experiment, the reaction between 25 cm3of 0.1 mol dm-3 nitric acid with excess zincproduces hydrogen gas. The graph of the volume of hydrogen gas against time is sketched.

A curve T is obtained.Dalam satu eksperimen, tindak balas antara 25 cm

3asid nitrik 0.1 mol dm

-3dengan zink berlebihan

menghasilkan gas hidrogen. Graf isipadu gas hidrogen melawan masa dilakarkan. Lengkung Tdiperolehi.


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If the experiment is repeated using another solution, which solution will produce curve U?Sekiranya eksperimen diulang dengan menggunakan larutan lain, larutan manakah yang akanmenghasilkan lengkung U?

A 25 cm3 of 0.2 mol dm-3nitric acid25 cm

3larutan asid nitrik 0.2 mol dm

-3

B 30 cm3 of 0.1 mol dm-3nitric acid30 cm


-3

C 50 cm3 of 0.05 mol dm-3nitric acid50 cm


-3

D 100 cm3 of 0.05 mol dm-3nitric acid100 cm


-3

Volume of hydrogen gas/cm3

Isipadu gas hidrogen/cm3

U

T

Time/second

Masa/saat


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28 The following is the thermochemical equation for a reaction.Berikut adalah persamaan termokimia bagi satu tindak balas

Calculate the heat change when 50 cm3

of 1.0 moldm-3

copper(II) sulphate solution reactswith excess zinc.Hitung perubahan haba apabila 50 cm

3larutan kuprum(II) sulfat 1.0 moldm

-3 bertindak balasdengan zink yang berlebihan.

A

B

C

D

10.5 kJ

105 kJ

420 kJ

4200 kJ

29 Diagram 5 shows four sets of apparatus to investigate the rate of reaction .

Rajah 5 di bawah menunjukkan empat set radas untuk mengkaji kadar tindak balas.

5cm of magnesium ribbon

5 cm pita magnesium

Set I Set II Set III Set IV

Diagram 5

Rajah 5

Which of the following set of apparatus shows the magnesium ribbon disappears faster?

Antara set radas yang berikut, yang manakah menunjukkan pita magnesium hilang paling

cepat?A

B

C

D

Set I

Set II

Set III

Set IV

Zn + CuSO4 ZnSO4 + Cu H = -210 kJmol-1

100 cm3of

Nitric acid

2 mol dm-3

100 cm3of

Sulphuric acid

2 mol dm-3

100 cm3of

Ethanoic Acid

2 mol dm-3

100 cm3of

hydrochloric

acid

2 mol dm-3


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30 Which of the following set up of apparatus is correct to electroplate iron ring with copper?

Antara susunan radas berikut, yang manakah betul untuk menyadur cincin besi dengan kuprum?

A

B

C

D

Iron(II) sulphate solution

Iron ring Copper

Iron ring

Copper(II) sulphate solution

Copper

Copper(II) sulphate solution

Iron ring Copper

Iron ring

Iron(II) sulphate solution

Copper


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31 Diagram 5 shows the set up of apparatus of a simple voltaic cell.

DIAGRAM 5

Which of the following pairs of electrodes is correct if the electrons move fromelectrode X to electrode Y?

Electrode X Electrode Y

A Tin Aluminium

B Zinc Magnesium

C Lead Iron

D Copper Silver

32 Which of the following solution has the lowest pH value?

A Ethanoic acid 0.1 mol dm-3

B Hydrochloric acid 0.1 mol dm-3

C Ammonia solution 0.1 mol dm-3

D Sodium hydroxide solution 0.1 mol dm-3

33 The chemical equation shows the reaction between copper and silver nitrate solution.

Cu + 2AgNO3 Cu(NO3)2 + 2Ag

Which of the following increases the frequency of the effective collisions of the reacting particles?

A Decrease the size of copper

B Increase the mass of copper

C Increase the volume of silver nitrate solution

D Decrease the temperature of silver nitrate solution

Electrode X

V

Electrode Y

Electrolyte


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34 The following equation shows the reaction between calcium carbonate , CaCO3and

hydrochloric acid, HCl :

Persamaan berikut menunjukkan tindak balas antara kalsium karbonat, CaCO3dan asid

hidroklorik, HCl :

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

Which of the following is the suitable method to determine the rate of reaction?

Antara berikut yang manakah kaedah yang sesuai untuk menentukan kadar tindak itu?

A Change in the temperature of the solution with time

Perubahan dalam suhu bagi larutan dengan masa

B Change in the volume of carbon dioxide gas with time

Perubahan isi padu gas karbon dioksida dengan masa

C Change in the mass of water with time

Perubahan jisim air dengan masa

D Change in the concentration of hydrochloric acid with time

Perubahan kepekatan asid hidroklorik dengan masa


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35 Diagram 6 shows the electrolysis of 1.0 mol dm-3

potassium iodide solution.

Rajah 6menunjukkan elektrolisis bagi larutan kalium iodida 1.0 mol dm-3

.

Which of the following are the products formed at the carbon electrodes X and Y?

Antara berikut yang manakah hasil yang terbentuk pada elektrod karbonXdan Y?

Carbon electrode X

Elektrod karbon X

Carbon electrode Y

Elektrod karbon Y

AOxygen

Oksigen

Hydrogen

Hidrogen

BIodine

Iodin

Hydrogen

Hidrogen

C HydrogenHidrogen

OxygenOksigen

DIodine

Iodin

Potassium

Kalium

36 Table 2 shows the concentration and pH value of hydrochloric acid and ethanoic acid

Jadual 2menunjukkan kepekatan dan nilai pH bagi asid hidroklorik dan asid etanoik

Type of acid

Jenis asid

Concentration / mol dm-3

Kepekatan / mol dm-3

pH value

nilai pH

Hydrochloric ric acidAsid hidroklorik 0.1 1

Ethanoic acid

Asid etanoik

0.1 4

Table 2

Jadual 2

1.0 mol dm-3

potassium

iodide solution

1.0 mol dm-3larutan kalium

Diagram 6

Carbon electrode Y

Elektrod karbonY

Carbon electrode X

Elektrod karbon X


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Which of the following statements are trueabout both acids?

Antara pernyataan berikut yang manakah benartentang kedua-dua asid?

I Hydrochloric acid is a stronger acid compared to ethanoic acid.

Asid hidroklorik adalah asid lebih kuat berbanding asid etanoik.

II Concentration of hydrogen ions is higher in hydrochloric acid compared with ethanoic

acid.

Kepekatan ion hydrogen lebih tinggi dalam asid hidroklorik berbanding dengan asid

etanoik.

III The degree of dissociation of hydrochloric acid in water is higher than ethanoic acid.

Darjah penceraian asid hidroklorik dalam air lebih tinggi berbanding asid etanoik.

IV Both acids can neutralized an alkali to produce salt and water

Kedua-dua asid dapat meneutralkan alkali untuk menghasilkan garam dan air

A I and III

B III and IV

C I, II and III

D I, II, III and IV

37 Diagram 7 shows the set up of the apparatus for the action of heat on substance W.

After a few minutes lime water turns cloudy.

Rajah 7menunjukkan susunan radas bagi kesan haba ke atas bahan W.

Selepas beberapa minit air kapur menjadi keruh.

Diagram 7

Rajah7

Which of the following salts could be W?

Antara garam-garam berikut yang manakah mungkin W?

Lime water

Air kapur

Heat

Panaskan

W


25/34

I

II

III

IV

Lead(II) nitrate

Plumbum(II) nitrat

Zinc carbonate

Zink karbonat

Copper(II) carbonate

Kuprum(II) karbonat

Potassium carbonate

Kalium karbonat

A

B

C

D

I and IV

II and III

I, II and III

II, III and IV

38 A substance has the following properties:

Suatu bahan mempunyai ciri-ciri berikut:

Hard and opaque

Keras dan tak lutcahaya

Good insulator of heat and electricity

Penebat haba dan elektrik yang baik

Inert towards chemicalsLengai terhadap bahan kimia

Which of following substances has the above properties?

Antara bahan-bahan berikut yang manakah mempunyai ciri-ciri seperti di atas?

A Ceramics

Seramik

B Glass

Kaca

C Metal

Logam

D Polymer

Polimer


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39 Table 3 shows the reactants and heat of neutralization of the reaction between sodium

hydroxide solution with methanoic acid and hydrochloric acid.

Jadual 3 menunjukkan bahan tindak balas dan haba peneutralan bagi tindak balas antara

larutan natrium hidroksida dengan asid metanoik dan asid hidroklorik.

Reactants

Bahan tindak balas

Heat of neutralization/ kJ mol-1

Haba peneutralan/ kJ mol-1

Methanoic acid and sodium hydroxide

solution

Asid metanoik dan larutan natrium

hidroksida

- 54.0

Hydrochloric acid and sodium hydroxide

solution

Asid hidroklorik dan larutan natrium

hidroksida

-57.0

Table 3

Jadual 3

Which of the following statements is true?

Antara pernyataan berikut yang manakah benar?

A Methanoic acid partially dissociates in water

Asid metanoiktercerai separa di dalam air

B Methanoic acid releases energy to the surrounding

Asid metanoikmembebaskan tenaga ke persekitaran

C Methanoic acid produces H+ions which can be replaced by Na

+ions

Asid metanoikmenghasilkan ion H+yang boleh menggantikan ion Na

+

D Methanoic acid absorbed some of the heat energy released to complete its dissociation

in water

Asid metanoikmenyerap sebahagian daripada tenaga yang dibebaskan untuk

melengkapkan penceraiannya dalam air


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40 In an experiment 50 cm31.0 mol dm

-3of dilute nitric acid solution is mixed with 50 cm

3of 1.0

mol dm-3

sodium hydroxide solution in a polystyrene cup. The temperature of the mixture

increased by 140C. What is the heat released in the experiment?

[Specific heat capacity of the solution is 4.2 Jg-1o

C-1

]

Dalam satu eksperimen 50 cm3larutan asid nitrik 1.0 mol dm-3dicampur dengan 50 cm3

larutan natrium hidroksida 1.0 mol dm-3di dalam cawan polistirena. Suhu campuran itu

bertambah sebanyak 14oC. Berapakah haba yang dibebaskan dalam eksperimen itu?

[Muatan haba tentu larutan ialah 4.2 Jg-1o

C-1

]

A 1470 J

B 2940 J

C 4410 J

D 5880 J

41 Table 4 shows the information of three chemical cells.

Jadual 4menunjukkan maklumat tentang tiga sel kimia.

Chemical cell

Sel kimia

Pair of metal electrodes

Pasangan elektrod logam

Voltage /V

Voltan /V

Negative terminal

Terminal negatif

I Q, P 0.7 Q

II R, Q 2.7 Q

III R, S 1.1 S

Table 4

Jadual 4

Which of the following is the arrangement in ascending order of these metals in the

electrochemical series?

Antara yang berikut, yang manakah susunan secara menaik bagi logam-logam ini dalam siri

elektrokimia?

A R, P, S, Q

B Q, P, S, R

C S, R, P, Q

D R, S, P, Q


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42 Hydrogen peroxide decomposes to produce oxygen and water.

The results of the decomposition of hydrogen peroxide are given below.

Hidrogen peroksida mengurai membebaskan oksigen dan air.

Keputusan satu eksperimen penguraian hidrogen peroksida diberi di bawah.

Time(s)

Masa (s)

0 15 30 45 60 75 90

Volume of O2(cm3)

Isipadu O2(cm3)

0 16 30 40 48 48 48

What is the average rate of this reaction?

Berapakah kadar tindak balas ini purata?

A 0.53 cm3s

-1

B 0.80 cm3s

-1

C 1.88 cm3s

-1

D 2.56 cm3s

-1

43 Which explanation is paired correctly with the application of the rate of reaction?

Pasangan manakah yang betul bagi menerangkan aplikasi kadar tindak balas?

Application

Aplikasi

Explanation

Penerangan

A It is easier to light a fire using small

pieces of charcoal.

Adalah lebih mudah menyalakan api

menggunakan ketulan kecil arang.

Total surface area exposed to air is

smaller.

Jumlah luas permukaan terdedah

kepada udara adalah lebih kecil.

B Fish and meat are normally kept in a

freezer.

Ikan dan daging disimpan dalam

pembeku sejuk.

The low temperature slows down the

rate of bacterial metabolism.

Suhu yang rendah merendahkan kadar

metabolisme bakteria.

C Food cooks faster in a pressure

cooker.

Makanan dimasak lebih cepat dalam

periuk tekanan.

The high pressure decreases the

number of water molecules in contact

with the food.

Tekanan yang tinggi mengurangkan

bilangan molekul air yang bersentuh

dengan makanan.

D Iron is used in the industrial

manufacture of ammonia.

Besi digunakan dalampembuatan ammonia dalam

industri.

To increase the activation energy of

the reaction.

Untuk meningkatkan tenagapengaktifan tindak balas.


29/34

44 The thermochemical equation represents the precipitation of lead(II) sulphate :

Persamaan termokimia mewakili tindak balas bagi pemendakan plumbum(II) sulfat:

Pb2+

(aq) + SO42-

(aq) PbSO4(s) H = 42 kJ mol-1

Which energy level diagram is correct ?

Gambar rajah aras tenaga manakah yang betul ?

A Energy

Tenaga

Pb2+

(aq) + SO42-

(aq) H = 42 kJ mol-1

B Energy

Tenaga

Pb2+(aq) + SO42-

(aq) H = + 42 kJ mol-1

C Pb2+(aq) + SO4

2-(aq)

Energy

Tenaga H = 42 kJ mol-1

D Pb2+

(aq) + SO42-

(aq)

Energy

Tenaga H = + 42 kJ mol-1


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45 The thermochemical equation for the precipitation of lead(II) chloride , PbCl2is given below.

Persamaan termokimia bagi pemendakan plumbum(II) klorida , PbCl2 diberikan

seperti di bawah.

Pb2+(aq) + 2 Cl(aq) PbCl2(s) H = 50 kJ mol-1

Pb2+

(ak) + Cl(ak) PbCl2(p) H = 50 kJ mol

-1

Which statement is true ?

Pernyataan manakah yang benar ?

A The reaction is endothermic.

Tindak balas adalah endotermik.

B The temperature of the reaction mixture increases.

Suhu campuran bahan tindak balas meningkat.

C The energy content of the PbCl2is higher than that of Pb2+

and Cl

ions.

Kandungan tenaga PbCl2 adalah lebih tinggi dari jumlah tenaga ion Pb2+

dan ion Cl

D Energy is absorbed when 1 mole of PbCl2is formed.

Tenaga diserap apabila 1 mol PbCl2terbentuk

46 The thermochemical equation for displacement of copper by zinc is given below.

Persamaan termokimia bagi penyesaran kuprum oleh zink diberikan seperti dibawah.

Zn(s) + CuSO4(aq) ZnSO4 (aq) + Cu(s) H = 210 kJ mol-1

Zn(p) + CuSO4(ak) ZnSO4 (ak) + Cu(p) H = 210 kJ mol-1

What is the mass of copper, Cu when 84 kJ of heat is released?

[Relative atomic mass: Cu = 64]

Berapakah jisim kuprum, Cu yang terbentuk apabila 84 kJ haba dibebaskan?[Jisim atom relatif: Cu = 64]

A 0.4 g

B 3.3 g

C 25.6 g

D 160.0 g


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47 The particulars below are obtained from an experiment to determine the heat of combustion of

butanol .

Volume of water = 250 cm3

Mass of butanol burnt = 0.37 g

Increase in water temperature = 12.8 oC

What is the heat of combustion of butanol?

[Specific heat capacity of water = 4.2 J g-1oC-1, Relative molecular mass of butanol = 74 ]

Butiran berikut diperolehi dari satu eksperimen bagi menentukan haba pembakaran butanol.

Isipadu air = 250 cm3

Jisim butanol = 0.37 g

Kenaikan suhu air = 12.8 C

Berapakah haba pembakaran butanol?

[Muatan haba tentu air = 4.2 J g-1

oC

-1,Jisim molekul relatif butanol = 74]

A - 1630 kJ mol-1

B - 2688 kJ mol-1

C - 4973 kJ mol-1

D - 6070 kJ mol-1

48 Substance X + Sulphuric acid Salt Y + Water + Carbon dioxide

Bahan X asid sulfuric Garam Y Air Karbon dioksida

Referring to the equation above, what could substance X be?

Merujuk persamaan diatas , apakah kemungkinan bahan X ?

A Coppe(11) oxide

Kuprum(II) oksida

B Magnesium metal

Logam magnesium

C Zinc carbonate

Zink karbonat

D Sodium hydroxide

Natrium hidroksida

49 Which of the following is a coloured salt?

Antara berikut yang manakah suatu garam berwarana?

A Iron(II) sulphate

Ferum(II)sulfat

B Silver nitrate

Argentum nitrat

C Lead(II) nitrate

Plumbum(II)nitrat

D Calcium carbonate

Kalsium karbonat


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50 The equation in Diagram 3 represents the reaction in the industrial preparation of ammonia.

Persamaan di dalam Rajah 3 mewakili tindak balas penghasilan ammonia dalam industri.

Diagram 3

Rajah 3

What is catalyst M?

Apakah mangkin M?

AIron

Ferum

BNickel

Nikel

CCopper(II) oxide

Kuprum(II) oksida

D

Manganese(IV) oxide

Mangan(IV) 0ksida

Catalyst M

N2 + 3 H2 2NH3


33/34


34/34

Diagram 14 shows the set up of the apparatus for an experiment to determine the rate of reaction

between sodium thiosulphate and sulphuric acid.

Rajah 14menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindak balas

antara natrium tiosulfat dengan asid sulfuric.

Diagram 14

Rajah14

Which of the following combination of the conditions take shortest time for the mark

X to disappear from sight?

Antara kombinasi keadaan berikut yang manakah mengambil masa paling singkat

untuk tanda X hilang daripada penglihatan?

Sulphuric acid

Asid sulfurik

Sodium Thiosulphate solution

Larutan natrium tiosulfat Temperature

Suhu

(oC)

Volume

Isipadu (cm3)

Concentration

Kepekatan

(mol dm-3

)

Volume

Isipadu

(cm3)

Concentration

Kepekatan

(mol dm-3

)

A 5 1.0 50 0.4 30

B 5 1.0 50 0.4 40

C 5 0.5 50 0.4 30

D 10 0.5 45 0.4 40

Sodium thiosulphate solution and

sulphuric acid

Natrium tiosulfat dan asid sulfurik

White paper

Kertas putih

Mark X

Tanda X

p1 oti 1 tg 5 chemistry 2011

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