chemistry 2006 p1p2p3 mrsm qa

SULIT 4541/1 Kimia Kertas 1 September 2006 1¼ jam

PEPERIKSAAN PERCUBAAN SPM 2006

MAKTAB RENDAH SAINS MARA

KIMIA

Kertas 1

Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU 1. Kertas soalan ini adalah dalam dwibahasa. 2. Soalan di halaman kiri adalah dalam bahasa Melayu. Soalan di halaman kanan

adalah yang sepadan dalam bahasa Inggeris. 3. Calon dikehendaki membaca maklumat di halaman 2 atau halaman 3

Kertas soalan ini mempunyai 47 halaman bercetak

http://cikguadura.wordpress.com/

4541/1 ©2006 Hak Cipta MARA [Lihat sebelah SULIT

3

INFORMATION FOR CANDIDATES 1. This question paper consists of 50 questions. 2. Answer all questions. 3. Answer each question by blackening the correct space on the answer sheet. 4. Blacken only one space for each question. 5. If you wish to change your answer, erase the blackened mark that you have made.

Then blacken the space for the new answer. 6. The diagrams in the questions provided are not drawn to scale unless stated. 7. You may use a non -programmable scientific calculator.


5

Question 1 to Question 50, are followed by four options A, B, C, and D. Choose the best option for each question and blacken the corresponding space on the objective answer sheet. 1 The diagram shows the apparatus set – up to investigate Process X.

What is Process X? A Diffusion

B Condensation

C Evaporation

D Sublimation

2 Which of the following is the common characteristic for isotope s of an element?

A Physical properties

B Chemical properties

C Nucleon number

D Number of neutrons

3 What is the definition of a mole?

A The volume occupied by 6.02 X 1023 particles

B The atomic mass of a substance which consist of 6.02 X 1023 atoms

C The molecular mass of a substance which consist of 6.02 X 1023 molecules

D The quantity of a substa nce which has the same number of particles as the number of atoms in 12.00 g of carbon-12

nitrogen dioxide (brown) nitrogen dioxide

(brown)

Process X Gas jar cover


7

4 The diagram shows an electrochemical cell.

What is the energy conversion involved?

A Electrical energy à heat energy

B Chemical energy àelectrical energy

C Electrical energy à chemical energy D Chemical energy à heat energy

5 The diagram shows the flow of ammonia gas into distilled water which contains a few drops of phenolphthalein

Which of the following is the correct observation?

A Solution remains colourless

B Solution turns from red to purple

C Solution turns from green to red

D Solution turns from colourless to pink


9

6 Which of the following is the main usage of the product in Haber Process?

A To produce pesticides

B To produce paint

C To produce detergent

D To produce fertilizers

7 Propane and propene are members of different homologous series. Which of the following is the general formulae representing the two compounds?

Propane Propene

A CnH2n CnH2n+2

B CnH2n+2 CnH2n

C C2nHn+2 CnH2n+1

D CnH2n+1 CnH2n+2

8 The equation below represents the fermentation reaction

What is substance Y? A Ethanol

B Glucose

C Glycerol

D Ethanoic acid

9 Penicillin is used for A reducing anxiety

B reducing pain

C controlling the level of glucose in blood

D destroying or preventing the growth of bacteria

C6H12O6 ? Y + CO2


11

10 The diagram shows a label on a bottle of ‘Orange Juice XYZ’.

What is the function of sulphur dioxide?

A To make the drink more concentrated

B To give colour to the drink

C To give orange flavour to the drink

D To make the drink last longer

11 Which of the following substance consists of free atoms?

A Nitrogen gas

B Xenon gas

C Glucose powder

D Sodium chloride

12 The diagram shows the molecular formula for glucose.

Which of the following substance has similar empirical formula as that of glucose?

Substance Molecular Formula

A Ethanol C2H6O

B Ethanal C2H4O

C Ethanoic acid C2H4O2

D Methyl ethanoa te C3H6O2

Orange Juice XYZ Ingredients: water, sugar, ascorbic acid, sulphur dioxide,

aspartame, E110, E102, vitamin A and D. Best before: 15 Dec 2006

C6H12O6


13

13 The table shows observations for the reaction between ethanoic acid and magnesium.

Reaction Observation

Magnesium powder + glacial ethanoic acid No changes

Magnesium powder + glacial ethanoic acid + water Effervescence

Which of the following explains the observation?

A Acetic acid dissolves in water producing hydrogen gas

B Acetic acid ionises to produce hydrogen ions in the presence of water

C Water ionises to hydrogen ions and react with magnesium

D Acetic acid ionises to hydrogen ions which combine with each other to form hydrogen gas

14 The table shows information about two acids

Acid Concentration pH Sulphuric acid 0.01 mol dm-3 1.1

Hydrochloric acid 0.01 mol dm-3 2.0

. Which of the following statement is true?

A Sulphuric acid is more concentrated than hydrochloric acid

B Sulphuric acid is a strong acid while hydrochloric acid is a weak acid

C Concentration of H+ ions in sulphuric acid is higher than that of

hydrochloric acid

D Sulphuric acid ionises completely while hydrochloric acid ionizes partially in

water


15

15 Figure shows the atomic arrangement in an alloy.

This alloy is harder than its pure metal because A arrangement of atoms in alloy is more orderly

B vibration of atoms in alloy is more vigorous

C layers of atoms in alloy is less able to slide

D absence of empty spaces between atoms in alloy

16 The diagram shows vases made from pewter.

Which of the following is the main metal used to produce pewter?

A Tin

B Copper

C Antimony

D Aluminium

X Atom

Y Atom

Z Atom


17

17 The diagram shows the chemical cha nge that occurs to compound G.

Which of the following is compound G?

A n- butane

B But - 1 - ene

C But - 2 - ene

D Butan - 2 - ol

18 Below is a list of chemicals used by a student to prepare ethyl ethanoate.

• 2 cm3 concentrated sulphuric acid • 10 cm3 aqueous solution of ethanoic acid 2.0 mol dm-3 • 15 cm3 pure ethanol

The mixture was heated under reflux for 30 minutes. At the end of the preparation the student failed to detect the presence of ethyl ethanoate. Which of the following causes the failure? A Pure ethanoic acid is not used

B The amount of sulphuric acid used is not enough

C 30 cm3 of pure ethanol should have been used

D Longer duration of heating under reflux is needed

19 Rusting causes a lot of financial loss. Which of the following is rust? A Zink oxide

B Iron(II) oxide

C Iron(III) oxide

D Lead(II) oxide

G Bromine in CCl4

H Br Br H ¦ ¦ ¦ ¦ H - C - C - C - C - H ¦ ¦ ¦ ¦ H H H H


19

20 The diagram shows the structure of a soap ion.

Which of the following is true about M when soap is used to clean greasy stain?

A M is alkaline

B M is hydrophilic

C Soluble in grease

D Reduce the surface tension of water

21 The diagram shows the particle arrangement of substance X at 100O C.

Which is the most probable melting and boiling points for X?

Melting point / O C Boiling point / O C

A -123 -78

B -17 135

C 0 78

D 111 400

M N

Particle of X


21

22 The diagram shows the position of elements P, Q, R and S in the Periodic Table of Elements.

R P S Q

What characteristics of P, Q, R and S?

P Q R S

A Metal Non-metal Inert gas Transition element B Non-metal Inert gas Metal Transition element C Metal Transition

element Non-metal Inert gas

D Inert gas Non-metal Transition element

Metal

23 Element T has the following characteristics :

Element T could be A Rubidium

B Silicon

C Manganese

D Magnesium

24 The table shows information about atoms of elements X, Y and Z.

Element Proton Number X 11

Y 14 Z 17

Based on the information given, it can be expected that A the atomic radius decreases from X to Z

B the density of atom decreases from X to Z

C elements X, Y and Z are in Period 2 of the Periodic Table

D X oxide is acidic, Y oxide is amphoteric and Z oxide is basic

• High melting and boiling points. • Forms compounds with various oxidation numbers. • T oxide acts as catalyst.


23

25 The diagram shows the formation of a compound. + à The bond in the compound is formed by

A donation of electrons

B sharing of electrons

C receiving of electrons

D exchanging of electrons

26 M is an ionic compound and dissolves in water to form a solution that conducts

electricity. Which of the following could be compound M?

A Sodium chloride

B Hydrogen chloride

C Carbon disulphide

D Lead(II) chloride

27 Which of the following equation represents the most suitable reaction to prepare an insoluble salt?

A Pb(OH)2 + 2HCl à PbCl2 + 2H2O

B Pb + H2SO4 à PbSO 4 + H2

C AgNO3 + NaCl à AgCl + NaNO3

D CaO + H2SO4 à CaSO4 + H2O

Carbon Chlorine Tetrachloromethane


25

28 The diagram shows the set-up of the apparatus for a Voltaic cell.

Which of the following is true about the Voltaic cell? I The aluminium strip becomes thinner

II Aluminium is the positive terminal

III Brown solid deposited at the copper strip

IV Bubbles of colourless gas formed at the copper strip

A I and IV only

B II and IV only

C I and III only

D I, II and III only

29 The diagram shows a sports equipment in which the frame is made from a composite

material.

Which of the following is the property of the composite material?

A High tensile strength

B Hard and brittle

C Heat resistant

D Transparent


27

30 The chemical equation shows a reaction between calcium carbonate with hydrochloric acid.

Which of the following changes cannot be used to determine the rate of reaction? A Change in the pH of the mixture

B Decrease in mass of calcium carbonate

C Increase in mass of calcium chloride

D Change in volume of carbon dioxide released

31 The equation shows the reaction between zink and hydrochloric acid. Zn (p) + 2HCl (ak) à ZnCl2(ak) + H2(g)

Which of the following statements are true about the reaction? I The mass of zinc decreases with time

II pH of hydrochloric acid increases with time

III Rate of hydrogen gas released increases w ith time

IV Frequency of collisions between H + ions and zinc atoms decreases with time

A I and III only

B III and IV only

C I, II and IV only

D II, III and IV only

CaCO3 + 2HCl ? CaCl2 + CO2 + H2O


29

32 In an experiment, 100 cm3 of 1.0 mol dm-3 hydrochloric acid reacts with excess magnesium to produce hydrogen gas. The graph of the volume of hydrogen gas against time is drawn and curve X is obtained.

If the experiment is repeated using another solution, which solution will produce curve Y?

A 50 cm3 of 1.0 mol dm-3 nitric acid

B 50 cm3 of 1.0 mol dm-3 ethanoic acid

C 25 cm3 of 1.0 mol dm-3 sulphuric acid

D 25 cm3 of 1.0 mol dm-3 hydrochloric acid

33 The diagram shows the structural formula for a compound extracted from pineapple.

Which of the following are needed to produce the compound synthetically?

Alcohol Carboxylic acid

A n- butanol Propanoic acid

B Ethanol Butanoic acid

C Ethanol Propanoic acid

D n- butanol Ethanoic acid

Volume of hydrogen, cm3


31

34 The diagram shows the apparatus set-up of an experiment to study redox reaction. After 20 minutes, the colourless solution around electrode X changes to brown while

the solution around electrode Y changes from orange to green.

Which of the following statement explains the observation of the experiment?

A Iodide ions are oxidized to iodine molecules.

B Oxidation number of iodine increases from 0 to +1.

C Electron flows from electrode Y to electrode X through the external circuit

D Oxidation number of chromium decreases from +6 to +2

35 The table shows the observations of an experiment involving heating of two substances.

Substances Observation

Carbon powder and metal P oxide Glow

Hydrogen gas and metal Q oxide Glow

Hydrogen gas and metal P oxide No changes

Which of the following is in ascending order for the reactivity of elements towards oxygen?

A Carbon, P, hydrogen, Q

B Q, hydrogen, P, carbon

C Hydrogen, P, carbon, Q

D Hydrogen, Q, carbon, P


33

36 Diagram shows an experiment carried out for iron(II) sulphate.

Which of the following is solution X?

A Potassium chloride solution

B Potassium bromide solution

C Sodium hydroxide solution

D Acidified potassium manganate(VII) solution

37 The diagram shows the energy profile for the formation of T from R and S.

What is the activation energy for the reaction?

A y kJ mol-1

B (x + y) kJ mol-1

C x kJ mol-1

D (x-y) kJ mol-1

x kJ mol-1

R + S

T y kJ mol-1

Energy


35

38 The diagram shows the electron arrangement in an atom of elements P and Q.

What is the formula and type of bond for the compound formed when P reacts with Q? Formula Bond A PQ2 Ionic

B PQ4 Ionic

C PQ Covalent

D PQ4 Covalent

39 The equation represents the redox reaction between ammonia and copper(II) oxide. 2 NH3 + 3CuO ? N2 + 3 Cu + 3H2O

Which of the following is true about the reaction?

A Ammonia is an oxidizing agent

B Nitrogen is a reducing agent

C Oxidation number of copper decreases from +2 to 0

D Oxidation number of hydrogen increases from -1 to +1

40 The table shows two experiments carried out to investigate the reaction between

calcium nitrate and sodium carbonate solution.

Calcium nitrate solution

Sodium carbonate solution Experiment

Volume (cm3)

Concentration (mol dm-3)

Volume (cm3)

Concentration, (mol dm-3)

Decrease in temperature,0 C

I 100.0 1.0 100.0 1.0 6.0

II 50.0 2.0 50.0 2.0 X What is the value of X?

A 1.5 0 C

B 3.0 0 C

C 6.0 0 C

D 12.0 0 C


37

R

2 _

41 The diagram shows an electron arrangement of R2- ion.

How many protons and electrons does an atom of R contain?

42 Nitrogen exists as diatoms.

What is the mass of one nitrogen molecule? Given that the relative atomic mass of N = 14; Avogadro constant = 6 x 1023 mol-1

A 2.1 x 10-23 g

B 2.3 x 10-23 g

C 4.7 x 10-23 g

D 28 x 10-23 g

Protons Electrons

A 8 6

B 8 10

C 10 10

D 8 8


39

43 An experiment is carried out to study the effect of concentration on the rate of reaction between sodium thiosulphate and hydrochloric acid. Graph of the concentration of sodium thiosulphate against 1/time is as shown.

Based on the graph, what is the value of t if the experiment is repeated using sodium thiosulphate solution 0.025 mol dm-3.

A 32.3 s

B 50.0 s

C 0.020 s

D 0.031s

44 What is the volume of distilled water required to be added to 25.0 cm3 of

0.5 mol dm-3 sulphuric acid in order to produce a solution of 0.1 mol dm -3 ?

A 75.0 cm3

B 100.0 cm3

C 125.0 cm3

D 150.0 cm3


41

45 The following shows the energy level diagram of a reaction. Energy

Zn + Cu2+ ∆H = - 190 kJ/mol Zn2+ + Cu

Which of the following statements are true about the reaction?

I Zinc is oxidized

II The reaction is exothermic

III The temperature decreases during the reaction

IV 95 kJ of heat is released when 0.5 mole of copper is displaced

A I and III only

B II and IV only

C III and IV only

D I, II and IV only

46 4.60 g of sodium is burnt in excess chlorine gas. The equation for the reaction is as

follows:

2Na (p) + Cl2 (g) à 2NaCl (p)

The product is dissolved in water to produce 250.0 cm3 of solution. What is the molarity of the solution? Given that the relative atomic mass of Na = 23.

A 0.05 mol dm -3

B 0.20 mol dm -3

C 0.40 mol dm -3

D 0.80 mol dm -3


43

47 The table shows the voltmeter readings when a pair of different metal electrodes are dipped into the copper(II) nitrate solution.

Metal electrode

Positive terminal Negative terminal Voltmeter reading (V)

P S 2.8

P Q 0.8

R S 1.2

Q R Y What is the value of Y? A 0.8

B 1.0

C 1.6

D 2.0

48 Copper(II) carbonate decomposes when heated strongly as represented by the

following equation.

CuCO3 à CuO + CO2

What is the volume of carbon dioxide gas released when 0.62g copper(II) carbonate is heated? Given that the relative atomic mass of Cu = 64, C = 12, O = 16 and 1 mol of gas occupies 24 dm3 at room temperature and pressure. A 120 cm3

B 240 cm3

C 480 cm3

D 640 cm3


45

49 The diagram shows the set-up of apparatus for the electrolysis of sodium chloride

solution 1.0 mol dm -3.

Which of the following observations are true about the electrolytic cell? I Shiny grey solid deposited at the cathode

II Colourless gas is collected in the test tube at the cathode

III A greenish-yellow gas is collected in the test tube at the anode

IV A damp blue litmus paper decolourised when put into the test tube at the

anode

A I and II only

B I and III only

C I, III and IV only

D II, III and IV only


47

50 Information on methane and butane is shown in the following table.

Fuel Relative

molecular mass

Chemical equation Heat of Combustion

Methane 16 CH4 + 2O 2 à CO2 + 2H 2O -890 kJ mol-1

Butane 58 C4H10 + 13/2 O2 à 4CO2 + 5H2O -2882 kJ mol-1

Based on the information shown in the table, the conclusions are I butane is more combustible than methane

II combustion of 1 g of methane produces more heat than 1 g of butane

III energy content of butane is higher than methane

IV combustion of 1 mole of butane produces more carbon dioxide than 1 mole of

methane

A I and III only

B I, II and IV only

C II, III and IV only

D I, II, III and IV


NAMA: …………………………………….

ANGKA GILIRAN: ……………………….

PEPERIKSAAN PERCUBAAN SPM 2006 MAKTAB RENDAH SAINS MARA

KIMIA

Kertas 2

Dua jam tiga puluh minit JANGAN BUKA KERTAS SOALAN INI

SEHINGGA DIBERITAHU

1. Tuliskan nama dan angka giliran anda pada ruang yang disediakan. 2. Kertas soalan ini adalah dalam dwibahasa.

3. Soalan di halaman kiri adalah dalam bahasa Mela yu. Soalan di halaman kanan adalah dalam bahasa Inggeris. 4. Calon dibenarkan menjawab keseluruhan atau sebahagian soalan sama ada dalam bahasa Melayu atau bahasa Inggeris. 5. Calon dikehendaki membaca maklumat di halaman 2 dan halaman 3.

Kod Pemeriksa

Bahagian

Soalan

Markah Penuh

Markah

Diperoleh 1 09 2 09 3 10 4 10 5 11

A

6 11 1 20

B 2 20 3 20

C 4 20 Jumlah

Kertas soalan ini mengandungi 51 halaman bercetak

4541/2 Kimia Kertas 2 Sept 2006 2 ½ jam

4541/2 © 2006 Hak Cipta


SULIT 4541/2

4541/2 © 2006 Hak Cipta MARA [lihat sebelah SULIT

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MAKLUMAT UNTUK CALON

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

2. Jawab semua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam

ruang yang disediakan dalam kertas soalan . 3. 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. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah. 5. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan

itu. 6. Rajah yang mengiringi soala n tidak dilukiskan mengikut skala kecuali dinyatakan.

7. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan

dalam kurungan. 8. Masa yang dicadangkan untuk menjawab Bahagian A ialah 90 minit, Bahagian B

ialah 30 minit dan Bahagian C ialah 30 minit.

9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan. 10. Serahkan semua kertas jawapan anda di akhir peperiksaan.

SULIT 4541/2


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Bahagian A

[60 markah]

Jawab semua soalan dalam bahagian ini. Masa yang dicadangkan untuk menjawab bahagian ini ialah 90 minit.

1 Rajah 1 menunjukkan simbol atom bagi unsur karbon dan oksigen.

RAJAH 1 Berdasarkan Rajah 1, jawab soalan-soalan berikut:

(a ) Apakah yang diwakili oleh :

(i) nombor 12 bagi atom unsur C? ..................................................................................................................

[1 markah]

(ii) nombor 8 bagi atom unsur O ?

.................................................................................................................. [1 markah]

(b ) (i) Apakah yang dimaksudkan dengan isotop?

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

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

[1 markah]

(ii) Nyatakan atom-atom yang merupakan isotop – isotop bagi unsur yang sama .

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

[1 markah]

(iii) Tuliskan simbol atom bagi isotop lain untuk unsur yang dinyatakan di (b)(ii).

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

[1 markah]

Untuk Kegunaan Pemeriksa

1(b)(iii)

1(a)(i)

1(a)(ii)

1(b)(i)

1(b)(ii)

SULIT 4541/2


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(c) (i) Berapakah bilangan elektron bagi atom ?

................................................................................................................. [1 markah ]

(ii) Tuliskan susunan elektron bagi atom di (c)(i). ……….…………………………………………………………………. [1 markah ]

(d ) Karbon dan oksigen terletak dalam kala yang sama dalam Jadual Berkala. Nyatakan kala tersebut dan jelaskan jawapan anda. ............................................................................................................................. .............................................................................................................................

[2 markah ]


1(c)(i) 1(c)(ii)

1(d)

JUMLAH

SULIT 4541/2


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2 Rajah 2 menunjukkan susunan radas bagi satu eksperimen untuk menentukan formula

empirik bagi satu oksida kuprum.

RAJAH 2

Berikut adalah data yang diperolehi daripada eksperimen tersebut:

Jisim kuprum oksida = 2.00 g Jisim logam kuprum = 1.60 g

(a ) Apakah yang dimaksudkan dengan formula empirik?

………………………………………………………………..…………...……. [1 markah]

(b ) Namakan satu bahan yang boleh digunakan untuk mengeringkan gas hidrogen. ……………………………………………………………………………….….

[1 markah]

(c) Mengapakah gas hidrogen kering perlu dilalukan ke dalam tabung pembakaran selama beberapa minit sebelum pemanasan dimulakan?

.....……………………………………………………………………………….

[1 markah]


2(a)

2(b)

2(c)

SULIT 4541/2


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(d ) Bagaimanakah anda boleh memas tikan tindak balas ini telah lengkap?

....……………………………………………………………………………….

[1 markah ] (e) Berdasarkan keputusan di atas,

(i) hitungkan bilangan mol atom kuprum dan bilangan mol atom oksigen

yang bertindak balas. Diberi jisim atom relatif bagi O = 16 dan Cu = 64.

[2 markah ]

(ii) Tentukan nisbah teringkas bilangan mol atom kuprum kepada bilangan mol atom oksigen.

[1 markah ]

(iii) Apakah formula empirik bagi oksida kuprum ini?

.................................................................................................................. [1 markah ]

(f) Mengapakah formula empirik oksida magnesium tidak boleh ditentukan

dengan kaedah di atas? ..………………………………………………………………………………….

[1 markah ]

2(d)

2(e)(i)

2(e)(ii)

2(e)(iii)

2(f)

JUMLAH


SULIT 4541/2


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3 Rajah 3 menunjukkan susunan radas bagi eksperimen penentuan haba peneutralan. 25.0 cm3 larutan asid nitrik 2.0 mol dm-3 ditindakbalaskan dengan 25.0 cm3 larutan kalium hidroksida 2.0 mol dm-3.

Sebelum tindak balas

Selepas tindak balas

Suhu maksimum = 43.5 oC

RAJAH 3

(a ) Cadangkan satu langkah berjaga-jaga yang perlu diambil semasa eksperimen ini dijalankan.

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

[1 markah ]

(b ) Nyatakan jenis tindak balas yang berlaku dari segi perubahan haba. ..............................................................................................................................

[1 markah ]

Larutan asid nitrik Suhu awal = 30.0 oC

Larutan kalium hidroksida Suhu awal = 30.0 oC

Termometer

Cawan polistirena

Termometer

Campuran larutan


3(a)

3(b)

SULIT 4541/2


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(c) Tuliskan persamaan kimia bagi tindak balas yang berlaku. .............................................................................................................................. [1 markah ]

(d ) Hitungkan

(i) bilangan mol asid nitrik dan bilangan mol ka lium hidroksida

[1 markah ]

(ii) perubahan haba dalam eksperimen itu. Diberi muatan haba tentu larutan ialah 4.2 Jg-1 oC -1 dan ketumpatan larutan ialah 1 g cm-3

[1 markah ]

(iii) haba peneutralan bagi tindak balas itu. ∆H = _________________

[ 2 markah ]


3(c)

3(d)(i)

3(d)(ii)

3(d)(iii)

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(e) Lukiskan gambar rajah aras tenaga bagi tindak balas itu. [2 markah ]

(f) Ramalkan nilai haba peneutralan sekiranya asid nitrik digantikan dengan asid

etanoik untuk bertindak balas dengan kalium hidroksida.

.............................................................................................................................. [1 markah ]


3(e)

3(f)

JUMLAH

SULIT 4541/2


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4 Jadual 4 menunjukkan data yang diperoleh oleh seorang pelajar daripada satu

eksperimen untuk mengkaji kadar penguraian hidrogen peroksida menggunakan mangkin mangan(IV) oksida.

Masa (s) 0 30 60 90 120 150 180 210 240 270

Isipadu gas oksigen (cm3)

0.00 18.00 31.00 39.00 43.00 46.00 48.00 49.00 50.00 50.00

JADUAL 4

(a ) Lukiskan gamba r rajah berlabel susunan radas bagi eksperimen itu. [2 markah ]

(b ) Tuliskan persamaan kimia bagi penguraian hidrogen peroksida. .............................................................................................................................. [1 markah ]

(c) 2.0 g serbuk mangan(IV) oksida telah digunakan pada awal eksperimen dan

didapati jisim mangan(IV) oksida tidak berubah pada akhir tindak balas. Terangkan mengapa. .............................................................................................................................. .............................................................................................................................. [1 markah ]

(d ) Mengapakah mangan(IV) oksida digunakan dalam bentuk serbuk? ..............................................................................................................................

[1 markah ]


4(a)

4(b)

4(c)

4(d)

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(e) (i) Gunakan data dalam Jadual 4 untuk melukis graf isipadu gas oksigen melawan masa pada kertas graf di bawah.

[ 3 markah ]


4(e)(i)

Graf isipadu gas oksigen melawan masa

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22

(ii) Berdasarkan graf di (e)(i), hitungkan kadar tindak balas pada masa 90 saat dan tunjukkan tangen pada graf di (e)(i).

[ 2 markah ]

4(e)(ii)


JUMLAH

SULIT 4541/2


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5 Rajah 5 menunjukkan susunan radas tindak balas melibatkan pemindahan elektron pada suatu jarak antara larutan kalium iodida dengan air bromin.

RAJAH 5

Merujuk kepada tindak balas di atas, jawab soalan berikut:

(a ) Nyatakan warna air bromin.

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

[1 markah ]

(b ) Namakan bahan yang dioksidakan dalam tindak balas. ..............................................................................................................................

[1 markah ]

(c) Nyatakan arah pengaliran elektron bagi tindak balas ini. .............................................................................................................................. [1 markah ]

(d ) Nyatakan perubahan nombor pengoksidaan bagi

(i) iodin

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

(ii) bromin

................................................................................................................. [2 markah ]


5(a)

5(c)

5(b)

5(d)

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(e) Tuliskan persamaan ion keseluruhan bagi tindak balas ini.

.............................................................................................................................. [1 markah ]

(f) Satu larutan berwarna perang terbentuk di sekitar elektrod P. (i) Terangkan dengan ringkas bagaimana anda menentusahkan larutan itu.

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

[2 markah ]

(ii) Terangkan bagaimana larutan tersebut dihasilkan.

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

.................................................................................................................. [2 markah ]

(g ) Apakah yang akan diperhatikan pada bacaan galvanometer jika air bromin pada bahagian Q digantikan dengan air klorin?

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

[1 markah ]

Untuk Kegunaan

Pemeriksa

5(e)

5(g)

5(f)(ii)

5(f)(i)

JUMLAH

SULIT 4541/2


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6 Rajah 6 menunjukkan carta alir bagi penukaran propena kepada polipropena, propana

dan propanol.

RAJAH 6

(a ) Namakan siri homolog bagi propena.

............................................................................................................................. [1 markah ]

(b ) Lengkapkan persamaan kimia untuk Proses I dengan melukis formula struktur bagi polipropena

[1 markah ]

(c) Tuliskan persamaan kimia bagi mewakili pr oses II. .............................................................................................................................. [1 markah ]

(d ) Propena dan propana terbakar dalam oksigen.

(i) Tuliskan persamaan kimia bagi salah satu tindak balas pembakaran ini dalam oksigen berlebihan. ..................................................................................................................

[1 markah ]

Polipropena

Propana Propena Propanol

Proses I

Proses II Proses III


6(a)

6(b)

6(c)

6(d)(i)

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(ii) Bandingkan kejelagaan pembakaran propena dan propana. Terangkan jawapan anda. Diberi jisim molekul relatif: propena = 42 dan propana = 44.

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

[3 markah ]

(e) (i) Terangkan bagaimana anda menjalankan Proses III.

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

[3 markah ]

(ii) Tuliskan persamaan kimia bagi Proses III.

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

[1 markah ]


6(d)(ii)

6(e)(ii)

6(e)(i)

JUMLAH

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Bahagian B

[20 markah ]

Jawab mana-mana satu soalan .

Masa yang dicadangkan untuk menjawab bahagian ini ialah 30 minit 7 (a ) Unsur-unsur dalam kumpulan yang sama dalam Jadual Berkala Unsur

mempunyai kereaktifan yang berbeza.

Terangkan mengapa dua logam ini mempunyai kereaktifan yang berbeza. [4 markah ]

(b ) Rajah 7.1 menunjukkan susunan radas satu eksperimen yang dijalankan untuk

mengkaji perubahan kimia yang berlaku ke atas logam kalium.

Logam kalium dibakar dalam balang gas berisi

oksigen

Hasil tindak balas dicampur air

Larutan X terhasil

RAJAH 7.1

(i) Persamaan kimia di bawah menunjukkan tindak balas antara logam kalium dengan gas oksigen. Diberi, jisim atom relatif K = 39, O = 16. Hitungkan jisim kalium oksida yang terhasil jika 3.9 g kalium bertindak balas dengan gas oksigen berlebihan pada keadaan bilik.

[4 markah ]

(ii) Namakan larutan X dan tuliskan persamaan kimia bagi pembentukannya.

Tindak balas kalium dengan oksigen lebih cergas daripada tindak balas litium dengan oksigen

4K + O 2 2K2O

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(c) (i) Jadual 7.2 menunjukkan keputusan ujian untuk membezakan

kekonduksian dua sebatian yang berlainan.

Sebatian Kekonduksian Elektrik

Tetraklorometana ( CCl4) Tidak mengalirkan arus elektrik

Larutan natrium klorida( NaCl) Boleh mengalirkan arus elektrik JADUAL 7.2

Terangkan mengapa terdapat perbezaan kekonduksian elektrik itu.

[4 markah ]

(ii) Jadual 7.3 menunjukkan keputusan proses elektrolisis ke atas dua larutan yang berlainan menggunakan elektrod karbon.

JADUAL 7.3

Terangkan mengapa terdapat perbezaan hasil di katod. [6 markah ]

Larutan Hasil di katod Hasil di anod

Natrium klorida 1.0 mol dm -3 Hidrogen Klorin

Kuprum(II) klorida 1.0 mol dm -3 Kuprum Klorin

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8 (a ) Terangkan fungsi steroid anabolik dan nyatakan tiga kesan sampingan yang

mungkin timbul akibat penyalahgunaan bahan ini. [4 markah]

(b ) Rajah 8.1 menunjukkan penghasilan baja Z dalam makmal dari tindak balas

antara gas ammonia dan asid sulfurik cair.

RAJAH 8.1

(i) Namakan baja Z.

[1 markah]

(ii) Tuliskan persamaan kimia yang seimbang bagi penghasilan baja Z. [2 markah]

(iii) Hitungkan isipadu gas ammonia yang bertindak balas lengkap dengan

asid sulfurik jika 13.2 g baja Z dihasilkan, Diberi jisim molar Z = 132 g mol -1 dan isipadu molar gas ialah 24.0 dm3 mol -1 pada suhu dan tekanan bilik.

[3 markah]

Steroid anabolik sering digunakan oleh para atlit untuk meningkatkan prestasi

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(c) Jadual 8.2 menunjukkan dua eksperimen yang telah dijalankan ke atas lateks.

Eksperimen Susunan radas Pemerhatian

I

Pepejal putih terhasil

II

Tiada perubahan

JADUAL 8.2 Huraikan dengan ringkas tentang perbezaan pemerhatian itu.

[5 markah ] (d) Rajah 8.3 menunjukkan penggunaan beberapa polimer sintetik dalam

kehidupan harian.

RAJAH 8.3

Terangkan punca dan kesan pencemaran penggunaan polimer sintetik secara berlebihan.

[5 markah ]

SULIT 4541/2


40

[5 marks] Bahagian C

[ 20 markah ]

Jawab mana-mana satu soalan . Masa yang dicadangkan untuk menjawab bahagian ini ialah 30 minit

9

(a ) Terangkan proses kimia yang berlaku dalam alat itu dan tuliskan persamaan bagi tindak balas yang terlibat.

[4 markah ]

(b ) Rajah 9 menunjukkan dua persamaan bagi tindak balas yang berbeza.

RAJAH 9

(i) Namakan sebatian R dan Q. (ii) Banding dan bezakan tindak balas I dan tindak balas II.

[ 6 markah ]

(c) Persamaan berikut menunjukkan pembentukan ester hasil daripada tindak balas antara asid etanoik glasial dengan suatu alkohol.

Huraikan satu eksperimen bagaimana anda menyediakan suatu ester yang

dinamakan . Nyatakan bagaimana anda mengesan ester yang terhasil dan tuliskan

persamaan kimia bagi tindak balas itu. [10 markah ]

Kandungan alkohol dalam udara hembusan pemandu yang mabuk boleh dikesan menggunakan sejenis alat pengesan yang

mengandungi kalium dikromat(VI)

R + Br2

Q + Br2 + HBr

Tindak balas I

Tindak balas II

R + Br2

Q + Br2 + HBr

ALKOHOL + ASID ETANOIK GLASIAL à ESTER + AIR

SULIT 4541/2


42

10 (a) Cuka merupakan larutan asid etanoik cair. Rajah 10 menunjukkan tindak balas apabila sebiji telur ayam dimasukkan ke

dalam cuka.

RAJAH 10

Terangkan pemerhatian ini dan sertakan persamaan bagi tindak balas yang terlibat. [4 markah ] (b) Label pada satu botol reagen yang mengandungi larutan X telah tertanggal. Larutan X disyaki larutan plumbum(II) nitrat atau kalsium nitrat.

Huraikan ujian kimia yang sesuai untuk menentusahkan ion-ion yang terdapat dalam larutan X itu. [6 markah ] (c) Anda dikehendaki menyediakan garam zink sulfat yang kering. Bahan kimia yang dibekalkan ialah:

• larutan zink klorida • asid sulfurik cair • larutan natrium karbonat

Huraikan satu eksperimen makmal bagaimana anda dapat menyediakan garam tersebut. Dalam huraian anda sertakan persamaan yang terlibat. [10 markah ]

KERTAS SOALAN TAMAT


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RUANG JAWAPAN / SPACE FOR YOUR ANSWER

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[Lihat sebelah

Nama : …….……………………………………...…….… No Giliran : …………….. Kelas : ………………….. SULIT Kimia Kertas 3 September 2006 1½ jam

PEPERIKSAAN PERCUBAAN SPM 2006 MAKTAB RENDAH SAINS MARA

KIMIA

Kertas 3 Satu jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Tuliskan nama, angka giliran dan kelas

anda pada ruang yang disediakan. 2. Kertas soalan ini adalah dalam dwibahasa 3. Soalan di halaman kiri adalah dalam

bahasa Melayu. Soalan di halaman kanan adalah yang sepadan dalam bahasa Inggeris.

4. Calon dibenarkan menjawab keseluruhan

atau sebahagian soalan sama ada dalam bahasa Melayu atau bahasa Inggeris.

5. Calon dikehendaki membaca maklumat di

halaman 2 dan halaman 3.

Kod

Pemeriksa

Soalan Markah Penuh

Markah Diperoleh

1 15

2 18

3 17

Jumlah 50

Kertas soalan ini mempunyai 20 halaman bercetak. INFORMATION FOR CANDIDATES SULIT 4541/3 © 2006 Hak Cipta MARA


SULIT 4541/3

4541/3 SULIT

- 3 -

INFORMATION FOR CANDIDATES 1. This question paper consists of three questions. Answer all questions. 2. Write your answers for Question 1 and Question 2 in the spaces provided in the

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

paper in detail. You may use equations, diagrams, tables, graphs and other suitable methods to explain your answers.

4. Show your working, it may help you to get marks. 5. If you wish to cancel any answer, neatly cross out the answer. 6. The diagrams in the questions are not drawn to scale unless stated. 7. Marks allocated for each question or part question are shown in brackets. 8. The time suggested to complete Question 1 and Question 2 is 45 minutes and Question 3 is 45 minutes. 9. You may use a non-programmable scientific calculator. 10. Hand in all your answer sheets at the end of the examination.

Marks awarded:

Score Description

3 Excellent: The best response

2 Satisfactory: An average response

1 Weak : An inaccurate response

0 No response or wrong response

SULIT 4541/3

4541/3 SULIT

- 5 -

Answer all questions. The time suggested to answer Question 1 and Question 2 is 45 minutes.

1 A student has carried out an experiment to compare the products for electrolysis of

aqueous copper(II) chloride of different concentrations. Figure shows the product at each electrode after the electrolysis has been carried out

for 20 minutes.

Cell I

Cell II

(a) Complete the following table by stating the observation at the anodes and its corresponding inferences.

Cell Observation at the anode Inference

I

……………………………………… ………………………………………

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II

……………………………………… ………………………………………

……………………………………… ………………………………………

[6 marks]

For Examiner’s

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1(a)

1(a)

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(b) Identify the variables involved in this experiment.

Manipulated variable: ………………………………………………………………………………… Responding variable: ………………………………………………………………………………… Controlled variable: …………………………………………………………………………………

[3 marks]

(c) State the hypothesis for this experiment.

………………………………………………………………………………… ………………………………………………………………………………… …………………………………………………………………………………

[3 marks]

(d) What will be observed at the anode of Cell II if the exper iment is carried out for three hours?

………………………………………………………………………………… …………………………………………………………………………………

[3 marks]

1(b)

1(c)

1(d )

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4541/3 SULIT

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2 A student carried out an experiment to determine the concentration of sodium hydroxide. 20.00 cm3 of aqueous sodium hydroxide and a few drops of phenolphthalein is titrated using hydrochloric acid 0.50 mol dm-3 from a burette.

Titration is stopped when the solution in the conical flask changes colour from pink to colourless.

Experiment was repeated three times. Figure shows the readings of the burette during titration.

(a) Record the burette readings in the spaces provided. [3 marks]

Experiment 1 Experiment 2 Experiment 3

Initial readings

of burette

……….. cm3

……….. cm3

……….. cm3

End point readings

……….. cm3

……….. cm3

……….. cm3 2(a)

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SULIT 4541/3

4541/3 SULIT

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(b) Construct a table and record the initial reading, end point reading and volume of hydrochloric acid used.

[3 marks]

(c) What is meant by the end point in the above experiment?

………………………………………………………………………………… …………………………………………………………………………………

[3 marks]

(d) The chemical equation for the reaction is

NaOH + HCl ? NaCl + H2O

(i) What is the average volume of hydrochloric acid used? (ii) Calculate the concentration of sodium hydroxide used in the

experiment.

[3 marks]

2(c)

2(d )

2(b)

For Examiner’s

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4541/3 SULIT

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(e) The experiment is repeated using aqueous barium hydroxide, Ba(OH)2. Predict the volume of hydrochloric acid required to reach the end point.

………………………………………………………………………………… …………………………………………………………………………………

[3 marks]

(f) The table shows the concentrations and the pH values of four different acids. Based on the information, classify the acid into strong acid and weak acid .

Acid Concentration / mol dm-3 pH Nitric acid 0.10 1.1

Oxalic acid, 0.05 3.2

Sulphuric acid 0.05 1.0 Methanoic acid 0.10 3.5

[3 marks]

2(e)

For Examiner’s

Use

2(f)

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4541/3 SULIT

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3

Refering to the situation above, plan a laboratory exper iment to compare the elasticity of prepared vulcanized and unvulcanized rubber.

Your planning must include the following items: (i) Statement of the problem (ii) All the variables (iii) Hypothesis (iv) Lists of substances and apparatus (v) Procedure (vi) Tabulation of data

[17 marks]

END OF QUESTION PAPER

A heavy duty glove which is made of vulcanized rubber is more

durable than a surgical glove which is made of unvulcanized rubber.


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Untuk Kegunaan

Pemeriksa / For

Examiner’s Use

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Untuk Kegunaan

Pemeriksa / For

Examiner’s Use

RUANG JAWAPAN/SPACE FOR YOUR ANSWERS

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chemistry 2006 p1p2p3 mrsm qa

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