Mara 2008 P2

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

4541/2

4541/2 Copyright Reserved MARA 2 [See next page

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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(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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(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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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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CONFIDENTIAL

(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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CONFIDENTIAL

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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SPACE FOR YOUR ANSWERS / RUANG JAWAPAN

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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.

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Documents

Mara 2008 P2