kimia sbp spm 2013

SULIT 4541/1

Kimia

Kertas 1

Ogos

2013

1 ¼ jam

Kertas ini mengandungi 27 halaman bercetak

4541/1 © 2013 Hak Cipta BPSBPSK [Lihat Halaman Sebelah

SULIT

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH

DAN SEKOLAH KECEMERLANGAN

KEMENTERIAN PELAJARAN MALAYSIA

PENTAKSIRAN DIAGNOSTIK AKADEMIK SBP 2013

SIJIL PELAJARAN MALAYSIA

KIMIA

Kertas 1

1 jam 15 minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Arahan:

1. Kertas ini mengandungi 50 soalan.

2. Jawab semua soalan.

3. Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan.

4. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

5. Tiap-tiap soalan diikuti oleh empat pilihan jawapan A , B , C dan D .

Pilih satu jawapan yang terbaik bagi setiap soalan dan hitamkan ruangan yang sepadan

pada kertas jawapan objektif anda.

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KEMENTERIAN PENDIDIKAN MALAYSIA

SULIT 2 4541/1

4541/1 © 2013 Hak Cipta BPSBPSK SULIT

1 Sublimation is a process when the solid change to gas.

Which substance undergoes sublimation?

Pemejalwapan adalah satu proses apabila pepejal bertukar kepada gas. Bahan manakah mengalami pemejalwapan?

A Iodine

Iodin B Carbon

Karbon C Sulphur

Sulfur D Bromine

Bromin

2 Which substance contains 6.02 x 1023

atoms?

Bahan manakah mengandungi 6.02x1023 atom?

A 1.0 mol of carbon dioxide gas

1.0 mol gas karbon dioksida B 1.0 mol of hydrogen gas

1.0 mol gas hidrogen C 1.0 mol of oxygen gas

1.0 mol gas oksigen D 1.0 mol of helium gas

1.0 mol gas helium

3 Which elements are located in Group 1 in the Periodic Table of Elements?

Unsur-unsur manakah terletak dalam Kumpulan 1 dalam Jadual Berkala Unsur?

A Sodium and caesium

Natrium dan sesium B Lithium and barium

Litium dan barium C Potassium and calcium

Kalium dan kalsium D Magnesium and sodium

Magnesium dan natrium


SULIT 3 4541/1


4 Which substance is an ionic compound?

Bahan manakah adalah sebatian ion?

A Ethanol

Etanol B Ammonia

Ammonia C Sodium oxide

Natrium oksida D Sulphur dioxide

Sulfur dioksida

5 Diagram 1 shows the set-up of apparatus of a chemical cell.

Rajah 1 menunjukkan susunan radas bagi satu sel kimia.

Diagram 1

Rajah 1

Electrode Y is the negative terminal of the cell.

What is Y?

Elektrod Y adalah negatif terminal bagi sel itu. Apakah Y?

A Iron

Ferum B Lead

Plumbum C Copper

Kuprum D Aluminium

Aluminium

Y electrode

Elektrod Y Zinc electrode

Elektrod zink Electrolyte

Elektrolit


SULIT 4 4541/1


6 Which of the following is a diprotic acid?

Antara berikut yang manakah asid diprotik?

A Nitric acid

Asid nitrik B Ethanoic acid

Asid etanoik C Sulphuric acid

Asid sulfurik D Hydrochloric acid

Asid hidroklorik

7 Which salt is insoluble in water?

Garam manakah tidak larut dalam air? A Lead(II) nitrate

Plumbum(II) nitrat B Iron(II) chloride

Ferum(II) klorida C Barium sulphate

Barium sulfat D Sodium carbonate

Natrium karbonat

8 Trophy and medal are normally made up of bronze.

What is the composition of bronze?

Piala dan pingat biasanya diperbuat daripada gangsa. Apakah komposisi gangsa?

A Copper and tin

Kuprum dan stanum B Copper and zinc

Kuprum dan zink C Tin, copper and antimony

Stanum, kuprum dan antimony D Iron, carbon and chromium

Ferum, karbon dan kromium


SULIT 5 4541/1


9 Which reaction has the lowest rate of reaction?

Tindak balas manakah mempunyai kadar paling rendah?

A

Precipitation of salt

Pemendakan garam B Combustion of alcohol

Pembakaran alkohol C Fermentation of glucose

Penapaian glukosa D

Neutralisation of acid and alkali

Peneutralan asid dan alkali

10 Diagram 2 shows the particles arrangement for the change of state of matter.

Rajah 2 menunjukkan susunan zarah bagi pertukaran keadaan jirim.

Diagram 2

Rajah 2

Which of the following is process X? Antara berikut yang manakah adalah proses X?

A Condensation

Kondensasi B Evaporation

Penyejatan

C Sublimation

Pemejalwapan

D Freezing

Pembekuan

Process X

Proses X


SULIT 6 4541/1


11 Which statement is incorrect about unsaturated hydrocarbons?

Pernyataan manakah yang tidak betul mengenai hidrokarbon tak tepu?

A Soluble in water

Larut dalam air B Cannot conduct electricity at any state

Tidak mengkonduksi elektrik dalam sebarang keadaan C Contain only carbon and hydrogen atoms

Mengandungi hanya atom karbon dan atom hidrogen D Contain at least one double bond between carbon atoms

Mengandungi sekurang-kurangnya satu ikatan ganda dua antara atom-atom karbon

12 Which statement defines oxidation?

Pernyataan manakah mendefinisikan pengoksidaan?

A Increase in oxidation number

Penambahan nombor pengoksidaan B Gain of hydrogen

Penerimaan hydrogen C Loss of oxygen

Kehilangan oksigen D Gain of electron

Penerimaan electron

13 The reaction between silver nitrate solution and hydrochloric acid is an exothermic

reaction.

Which statement is correct about the reaction?

Tindak balas antara larutan argentum nitrat dengan asid hidroklorik adalah tindak balas eksotermik. Pernyataan manakah betul tentang tindak balas itu?

A Heat is absorbed from surroundings

Haba diserap daripada persekitaran B The products formed are more stable than reactants

Hasil tindak balas lebih stabil daripada bahan tindak balas C The surroundings temperature increases during the reaction

Suhu persekitaran meningkat semasa tindak balas D The energy content of reactants is lower than the energy content of products

Kandungan tenaga bahan tindak balas lebih rendah daripada kandungan tenaga hasil indak balas

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SULIT 7 4541/1


14 Diagram 3 shows a decorative glass which is used in the house. The glass has the

following properties.

Rajah 3 menunjukkan satu kaca perhiasan yang digunakan di rumah. Kaca itu mempunyai ciri-ciri berikut.

Diagram 3

Rajah 3

Which of the following glass has the above properties?

Kaca manakah mempunyai ciri-ciri seperti di atas?

A Fused glass

Kaca silika terlakur B Soda-lime glass

Kaca soda kapur C Borosilicate glass

Kaca borosilikat D Lead crystal glass

Kaca plumbum Kristal

15 What is the function of aspartame?

Apakah fungsi aspartam?

A Stabiliser

Penstabil B Flavouring

Perisa

C Preservative

Pengawet D Antioxidant

Antipengoksida

High refractive index

Indeks biasan yang

tinggi High density

Ketumpatan yang tinggi

Optically transparent

Lutsinar secara optik


SULIT 8 4541/1


16 Diagram 4 shows the set-up of apparatus for an experiment to determine the empirical

formula of magnesium oxide.

Rajah 4 menunjukkan susunan radas bagi satu eksperiment untuk menentukan formula empirik magnesium oksida.

Panaskan

Diagram 4

Rajah 4

The lid of crucible must be lifted at intervals during the heating process.

What is the reason for this action?

Penutup mangkuk pijar perlu diangkat sekali sekala semasa proses pemanasan. Apakah sebab tindakan ini diambil?

A To get the accurate mass of magnesium oxide

Untuk mendapatkan jisim yang tepat bagi magnesium oksida B To allow oxygen enter into the crucible and react with magnesium

Untuk membenarkan oksigen masuk ke dalam mangkuk pijar dan bertindak balas dengan magnesium

C To ensure the complete reaction of magnesium to form magnesium oxide

Untuk memastikan tindak balas lengkap magnesium untuk membentuk magnesium oksida

D To release the white fumes that produce from combustion to the surroundings

Untuk membebaskan wasap putih yang terhasil daripada pembakaran ke persekitaran

Heat

Magnesium ribbon

Pita magnesium

Tripod stand

Tungku kaki tiga

Pipe clay triangle

Segitiga tanah liat

Tongs to remove lid

Penyepit untuk mengangkat penutup


SULIT 9 4541/1


17 Which isotope is used in radiotherapy for the treatment of cancer?

Isotop manakah digunakan dalam radioterapi untuk mengubati penyakit kanser?

A Cobalt-60

Kobalt-60 B Sodium-24

Natrium-24 C Carbon-14

Karbon-14 D Phosphorus-32

Fosforus-32

18 Element M forms two different chlorides, MCl2 and MCl3.

What is M ?

Unsur M membentuk dua jenis klorida, MCl2 dan MCl3 . Apakah M?

A Iron

Ferum B Zinc

Zink C Copper

Kuprum D Lead

Plumbum

19 Which substance is an electrolyte?

Bahan manakah adalah elektrolit?

A Glucose

Glukosa

B Naphthalene

Naftalena

C Ethanoic acid

Asid etanoik D Ethyl ethanoate

Etil etanoat


SULIT 10 4541/1


20 Diagram 5 shows the set-up of apparatus to investigate the electrical conductivity of

substance P.

Rajah 5 menunjukkan susunan radas untuk mengkaji kekonduksian elektrik bagi bahan P.

Diagram 5

Rajah 5 Substance P lights up the bulb because

Bahan P menyalakan mentol kerana

A soluble in water.

larut dalam air. B has high melting point.

mempunyai takat lebur yang tinggi. C has free moving ions.

mengandungi ion-ion yang bebas bergerak. D has strong electrostatic forces between ions.

mempunyai daya elektrostatik yang kuat antara ion-ion.

21 Which of the following is correct about weak alkalis?

Antara berikut yang manakah betul mengenai alkali lemah? A Unable to neutralise acid

Tidak boleh meneutralkan asid B The pH value is less than 7

Nilai pH kurang daripada 7 C Able to change blue litmus paper to red

Boleh menukarkan kertas litmus biru ke merah D Ionise partially in water to produce hydroxide ion

Mengion separa dalam air untuk menghasilkan ion hidroksida

P


SULIT 11 4541/1


22 Which reactants are suitable to prepare copper(II) sulphate?

Bahan manakah sesuai untuk menyediakan kuprum(II) sulfat?

A Copper and sulphuric acid

Kuprum dan asid sulfurik B Copper(II) carbonate and sulphuric acid

Kuprum(II) karbonat dan asid sulfurik C Copper(II) oxide and sodium sulphate

Kuprum(II) oksida dan natrium sulfat D Copper(II) nitrate and sodium sulphate

Kuprum(II) nitrat dan natrium sulfat

23 A substance has the following properties:

Satu bahan mempunyai ciri-ciri berikut: ● Hard and opaque Keras dan legap ● Inert towards chemicals

Lengai terhadap bahan kimia ● Good insulator of heat and electricity Penebat haba dan elektrik yang baik Which substance has the above properties?

Bahan manakah mempunyai ciri-ciri di atas?

A Ceramic

Seramik B Polymer

Polimer C Metal

Logam D Glass

Kaca


SULIT 12 4541/1


24 The higher the concentration of reactant, the higher the rate of reaction.

Which statement explains why the rate of reaction increases?

Apabila kepekatan bahan tindak balas meningkat, kadar tindak balas meningkat. Pernyataan manakah menerangkan mengapa kadar tindak balas meningkat?

A Kinetic energy of the particles increases

Tenaga kinetik zarah-zarah bertambah B The total surface area of the particles increases

Jumlah luas permukaan zarah-zarah bertambah C The number of particles per unit volume increases

Bilangan zarah-zarah per unit isi padu bertambah D More particles are able to achieve lower activation energy

Lebih banyak zarah-zarah berupaya untuk mencapai tenaga pengaktifan yang lebih rendah

25 Diagram 6 shows the structural formula of substance X.

Rajah 6 menunjukkan formula struktur bagi bahan X.

Diagram 6

Rajah 6

Which of the following are properties of substance X?

Antara berikut yang manakah sifat-sifat bahan X?

I Reacts with copper to produce hydrogen gas

Bertindak balas dengan kuprum menghasilkan gas hidrogen II Colourless liquid at room temperature

Cecair tidak berwarna pada suhu bilik III Reacts with alcohol to form an ester

Bertindak balas dengan alkohol menghasilkan sejenis ester IV Does not dissolve in water

Tidak larut di dalam air

A I and II

I dan II B I and IV

I dan IV C II and III

II dan III D III and IV

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SULIT 13 4541/1


26 Which substance accepts electron?

Bahan manakah menerima elektron?

A Dehydrating agent

Agen pengontangan B Emulsifying agent

Agen pengemulsian C Oxidising agent

Agen pengoksidaan D Reducing agent

Agen penurunan

27 The thermochemical equation represents the neutralisation between hydrochloric acid,

HCl and sodium hydroxide, NaOH solution.

Persamaan termokimia mewakili tindak balas peneutralan antara asid hidroklorik, HCl dan larutan natrium hidroksida, NaOH. HCl + NaOH NaCl + H2O H = -57 kJ mol

-1

Which substance is suitable to replace hydrochloric acid to obtain the same H value?

Bahan manakah yang sesuai menggantikan asid hidroklorik untuk memperoleh nilai H yang sama?

A Nitric acid

Asid nitric B Ethanoic acid

Asid etanoik C Carbonic acid

Asid karbonik D Phosphoric acid

Asid fosforik


SULIT 14 4541/1


28 Diagram 7 shows the elements in Period 3 of the Periodic Table of the Elements.

Rajah 7 menunjukkan unsur-unsur dalam Kala 3 Jadual Berkala Unsur.

Na Mg Al Si P S Cl Ar

Diagram 7

Rajah 7 Which of the following statement is correct?

Antara pernyataan berikut yang manakah betul?

A Argon is denser than magnesium

Argon lebih tumpat daripada magnesium B Chlorine is more electronegative than sulphur

Klorin lebih elektronegatif daripada sulfur C Sodium has smaller atomic size than aluminium

Natrium mempunyai saiz atom lebih kecil daripada aluminium D Magnesium has lower melting point than phosphorus

Magnesium mempunyai takat lebur lebih rendah daripada fosforus

29 Which equations represent a neutralisation reaction?

Persamaan manakah mewakili tindak balas peneutralan?

I MgO + 2HCl MgCl2 + H2O

II CH3COOH + KOH CH3COOK + H2O

III Mg + 2AgNO3 Mg(NO3)2 + 2Ag

IV BaCl2 + H2SO4 BaSO4 + 2HCl

A I and II

I dan II B II and III

II dan III C I and IV

I dan IV

D III and IV

III dan IV


SULIT 15 4541/1


30 Diagram 8 shows a cut apple turns brown after 20 minutes.

Rajah 8 menunjukkan sepotong epal yang bertukar perang selepas 20 minit.

Diagram 8

Rajah 8

Which of the following is the reason why the cut apple turns brown and the type of

food additive used to prevent it?

Antara berikut yang manakah sebab mengapa epal yang dipotong itu bertukar perang dan jenis bahan tambah makanan yang digunakan untuk mengelakkannya?

Reason

Sebab

Food additive

Bahan tambah makanan

A The growth of microorganisms

Pembiakan mikroorganisma

Preservative

Pengawet B Oxidation occur

Pengoksidaan berlaku

Antioxidant

Antipengoksida

C Concentration of salt is high

Kepekatan garam adalah tinggi Flavouring

Perisa

D Azo compound presents in the apple

Sebatian azo wujud dalam epal Colouring

Pewarna

31 A woman is always sad and anxious.

Which medicine is suitable to treat this patient?

Seorang wanita selalu sedih dan gelisah. Ubat manakah paling sesuai untuk mengubati pesakit itu?

A Chlorpromazine

Klorpromazin

B Tranquilizer

Trankuilizer

C Penicillin

Penisilin

D Aspirin

Aspirin

Brown colour

Warna perang perang


SULIT 16 4541/1


32 Diagram 9 shows the the electron arrangement of a compound formed between carbon, C and

element Y. The letter Y is not the actual symbol of the element.

Rajah 9 menunjukkan susunan elektron bagi sebatian yang terbentuk antara karbon, C dan unsur Y. Huruf Y bukan simbol sebenar unsur itu.

Diagram 9

Rajah 9

What is the formula of the compound formed when lithium reacts with Y?

Apakah formula bagi sebatian yang terbentuk apabila litium bertindak balas dengan Y?

A LiY

B LiY2

C LiY4

D Li2Y

33 Atoms X and Y are isotopes. The nucleon number of atom Y is 37 and it has 20 neutrons.

What is the electron arrangement of atom X?

Atom X dan Y adalah isotop. Nombor nukleon atom Y adalah 37 dan ia mempunyai 20 neutron. Apakah susunan elektron atom X?

A 2.7

B 2.8.7

C 2.8.2

D 2.8.8.2

Y Y x X x

x

x x x

C


SULIT 17 4541/1


34 Diagram 10 shows an energy profile, X for one of the stage in the production of sulphuric

acid through Contact Process.

Rajah 10 menunjukkan profil tenaga, X bagi salah satu peringkat dalam penghasilan asid sulfurik melalui Proses Sentuh.

Diagram 10

Rajah 10

What is the change needed to be done to obtain curve Y?

Apakah perubahan yang perlu dilakukan untuk mendapat lengkung Y?

A Heat the reactants at 450oC

Panaskan bahan tindak balas pada suhu 450oC B Compress the reactants at 1 atm

Mampatkan bahan tindak balas pada tekanan 1 atm C Increase the concentration of reactants

Tingkatkan kepekatan bahan tindak balas D Heat the reactants with the presence of vanadium(V) oxide

Panaskan bahan tindak balas dengan kehadiran vanadium(V) oksida

Y

X

2SO2 + O2

2SO3

Energy

Tenaga


SULIT 18 4541/1


35 Diagram 11 shows the apparatus set-up for the electrolysis of sodium nitrate solution,

NaNO3 using carbon electrodes.

Rajah 11 menunjukkan susunan radas bagi elektrolisis larutan natrium nitrat, NaNO3 menggunakan elektrod-elektrod karbon.

Diagram 11

Rajah 11

What are the products at electrodes X and Y?

Apakah hasil tindak balas pada elektrod X dan Y? X Y

A Oxygen gas

Gas oksigen Sodium

Natrium B Hydrogen gas

Gas hidrogen Oxygen gas

Gas oksigen C Nitrogen gas

Gas nitrogen Sodium

Natrium D Oxygen gas

Gas oksigen Hydrogen gas

Gas hidrogen

36 Copper(II) sulphate solution is electrolysed using carbon electrodes.

Which half-equations represent the reactions at the anode and the cathode?

Larutan kuprum(II) sulfat dielektrolisiskan menggunakan elektrod-elektrod karbon. Setengah persamaan manakah mewakili tindak balas di anod dan di katod?

Anode

Anod Cathode

Katod A Cu

2+ + 2e Cu 4OH

2H2O + O2 + 4e

B 4OH

2H2O + O2 + 4e 2H+ + 2e H2

C 4OH

2H2O + O2 + 4e Cu2+

+ 2e Cu

D 2H+ + 2e H2 4OH

2H2O + O2 + 4e

Electrode Y

Elektrod Y Electrode X

Elektrod X Sodium nitrate solution

Larutan natrium nitrat

larutan natrium nitrat


SULIT 19 4541/1


37 Diagram12 shows the set-up of apparatus for the decomposition of compound Q.

Rajah 12 menunjukkan susunan radas bagi penguraian sebatian Q.

Diagram 12

Rajah 12

When Q is heated, the lime water turns milky.

What is compound Q?

Apabila Q dipanaskan, air kapur bertukar keruh. Apakah sebatian Q?

A Ammonium carbonate

Ammonium karbonat B Potassium carbonate

Kalium karbonat C Sodium carbonate

Natrium karbonat D Zinc carbonate

Zink karbonat

38 A farmer discovered that his plants were not growing well because the soil was acidic.

Which substance is used to overcome the problem?

Seorang petani mendapati tanamannya tidak tumbuh dengan subur kerana tanahnya berasid. Bahan manakah digunakan untuk mengatasi masalah tersebut?

A Zinc oxide Zink oksida

B Calcium oxide Kalsium oksida

C Potassium hydroxide

Kalium hidroksida

D Magnesium hydroxide

Magnesium hidroksida

Lime water

Air kapur

Heat

Panaskan

Q


SULIT 20 4541/1


39 Diagram 13 shows curve I in a graph of volume of gas released against time for the reaction

between excess zinc powder and 100 cm3 of 1.0 mol dm

-3 hydrochloric acid, HCl.

Which of the following conditions represents curve II?

Rajah 13 menunjukkan lengkung I dalam graf isi padu gas terbebas melawan masa bagi tindak balas antara serbuk zink berlebihan dengan 100 cm3 asid hidroklorik, HCl 1.0 mol dm-3. Antara berikut keadaan manakah mewakili lengkung II?

Diagram 13

Rajah 13 Concentration of HCl (mol dm

-3)

Kepekatan HCl ( mol dm-3) Volume of HCl (cm

3)

Isi padu HCl (cm3)

A

0.5 100

B

1.0 50

C

2.0 50

D

2.0 25

Volume of gas (cm3)

Isi padu gas (cm3)

Time (s)

Masa (s)

I

II


SULIT 21 4541/1


40 Which of the following shows the structural formula for 2-methylbut-2-ene.

Antara berikut yang manakah menunjukkan formula struktur bagi 2-metilbut-2-ena.

A

B

C

D


SULIT 22 4541/1


41 Diagram 14 shows two experiments to investigate the effect of metals X and Y on the

rusting of iron.

Rajah 14 menunjukkan dua eksperimen untuk mengkaji kesan logam X dan Y terhadap pengaratan besi.

Experiment

Eksperimen Observation

Pemerhatian

No change

Tiada perubahan

Blue spot formed

Tompok biru terbentuk

Diagram 14

Rajah 14 Arrange X, Y and iron in order of increasing tendency to release electrons.

Susun X, Y dan besi dalam urutan pertambahan kecenderungan melepaskan elektron.

A Iron , X , Y

Besi , X , Y B X , iron , Y

X , besi , Y C X , Y , iron

X , Y , besi D Y , iron , X

Y , besi , X

Jelly solution + potassium

hexacyanoferrate(III)

Larutan agar + kalium heksasianoferat(III) air Iron nail and metal X

Paku besi dan logam X

Jelly solution + potassium

hexacyanoferrate(III)

Larutan agar + kalium heksasianoferat(III) air Iron nail and metal Y

Paku besi dan logam Y


SULIT 23 4541/1


42 Table 1 shows temperature change obtained for two set of experiments.

Jadual 1 menunjukkan perubahan suhu yang didapati bagi dua set eksperimen.

Set

Set Reactants

Bahan tindak balas Temperature change (

oC)

Perubahan suhu ( oC)

I

Magnesium powder + 25 cm3 of 0.2 mol dm

-3

copper(II) sulphate solution

Serbuk magnesium + 25 cm3 larutan kuprum(II) sulfat 0.2 mol dm-3

II

Magnesium powder + 25 cm3 of copper(II)

sulphate solution 0.4 mol dm-3

Serbuk magnesium + 25 cm3 larutan kuprum(II) sulfat 0.4 mol dm-3

x

Table 1

Jadual 1

What is the value of x?

Apakah nilai x?

A

B 2

C 0.5

D 0.25

43 Element X is located below potassium in the Periodic Table of Elements.

X is not the actual symbol of the element.

Which statement is correct about element X?

Unsur X berada di bawah kalium dalam Jadual Berkala Unsur. X bukan simbol sebenar unsur itu.

Pernyataan manakah betul tentang unsur X?

A X is less dense than potassium

X kurang tumpat daripada kalium B X is less reactive than potassium

X kurang reaktif daripada kalium C X atom is smaller than potassium atom

Atom X lebih kecil daripada atom kalium D X is more electropositive than potassium

X lebih elektropositif daripada kalium


SULIT 24 4541/1


44 Table 2 shows the proton number of four atoms of elements.

Jadual 2 menunjukkan nombor proton bagi empat atom unsur.

Atom

Atom W X Y Z

Proton number

Nombor proton 12 8 18 17

Table 2

Jadual 2 Which elements react to form an ionic compound?

Unsur-unsur manakah bertindak balas untuk membentuk sebatian ion? I W and X

W dan X II W and Z

W dan Z III X and Y

X dan Y IV X and Z

X dan Z

A I and II

I dan II

B I and III

I dan III

C II and IV

II dan IV

D III and IV

III dan IV

45 What is the number of atoms in 8.5 g of ammonia gas, NH3?

[Molar mass of NH3 = 17 ; Avogadro constant = 6.02 x 1023

mol-1

]

Berapakah bilangan atom dalam 8.5 g ammonia gas, NH3?

[Jisim molar NH3 = 17 ; Pemalar Avogadro = 6.02 x 1023

mol-1]

A 0.5 x 6.02 x 10

23

B 0.5 x 4 x 6.02 x 1023

C 8.5 x 6.02 x 1023

D 8.5 x 4 x 6.02 x 1023


SULIT 25 4541/1


46 The equation represents the reaction between sulphuric acid and sodium hydroxide.

Persamaan mewakili tindak balas antara asid sulfurik dan natrium hidroksida. H2SO4 + 2NaOH K2SO4 + 2H2O

What is the volume of 1.0 mol dm-3

sodium hydroxide solution needed to neutralise

25.0 cm3 of 1.0 mol dm

-3 sulphuric acid?

Berapakah isipadu larutan natrium hidroksida 1.0 mol dm-3 yang diperlukan untuk meneutralkan 25.0 cm3 asid sulfurik 1.0 mol dm-3?

A 12.5 cm3

B 25.0 cm3

C 50.0 cm3

D 75.0 cm3

47 Table 3 shows the volume of oxygen gas collected in the decomposition of hydrogen

peroxide.

Jadual 3 menunjukkan isi padu gas oksigen terkumpul dalam penguraian hidrogen peroksida. Time (s)

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

Volume of oxygen (cm3)

Isi padu oksigen (cm3) 0.0 7.0 14.5 20.5 26.2 30.5 30.5 30.5

Table 3

Jadual 3 What is the average rate of reaction in the second minute?

Berapakah kadar tindak balas purata dalam minit ke-2?

A 0.254 cm3 s

-1

B 0.218 cm3 s

-1

C 0.203 cm3 s

-1

D 0.195 cm3 s

-1


SULIT 26 4541/1


48 Diagram 15 shows a structural formula of an ester propyl ethanoate.

Rajah 15 menunjukkan formula struktur bagi satu ester propil etanoat.

Diagram 15

Rajah 15

What are the structural formula of alcohol and carboxylic acid used to prepare the ester?

Apakah formula struktur alkohol dan asid karbosilik yang digunakan untuk menyediakan ester itu?

Alcohol

Alkohol Carboxylic acid

Asid karbosilik A CH3CH2OH CH3COOH

B CH3CH2CH2OH CH3COOH

C CH3CH2 CH2OH CH3CH2COOH

D CH3CH2 OH CH3CH2COOH

49 R is located between aluminium and iron in the reactivity series of metals.

Which oxide is not reduced by R?

R terletak antara magnesium dan ferum dalam siri kereaktifan logam. Oksida manakah tidak diturunkan oleh R?

A Copper(II) oxide

Kuprum(II) oksida B Magnesium oxide

Magnesium oksida C Silver oxide

Argentum oksida

D Tin(II) oxide

Stanum(II) oksida

H O H H H

H C C O C C C H

H H H H


SULIT 27 4541/1


50 The thermochemical equation represents the combustion of methanol, CH3OH.

Persamaan termokimia mewakili pembakaran methanol, CH3OH. CH3OH + 3/2 O2 CO2 + 2H2O H = -728 kJ mol

-1

What is the mass of methanol needed to raise the temperature of 250 cm3 of water by

27.8C?

[Molar mass of CH3OH = 32; Specific heat capacity of water = 4.2 J g-1

C-1

;

Density of water = 1 g cm-3

]

Berapakah jisim metanol yang diperlukan untuk menaikkan suhu 250 cm3 air sebanyak 27.8 C? [Jisim molar CH3OH = 32; Muatan haba tentu air =4.2 J g-1 C-1; Ketumpatan air = 1 g cm-3]

A 2.56 g

B 1.88 g

C 1.28 g

D 0.79 g

END OF QUESTION PAPER

KERTAS SOALAN TAMAT

http://cikguadura.wordpress.com/


SULIT 4541/2

Chemistry

Kertas 2

Ogos

2013

2½ JAM


4541/2 © 2013 Hak Cipta BPSBPSK [Lihat Halaman Sebelah

SULIT

BAHAGIAN PENGURUSAN SEKOLAH BERASRAMA PENUH





CHEMISTRY

KERTAS 2

2 JAM 30 MINIT


Arahan:

1. Tuliskan Nama dan Tingkatan pada ruang yang disediakan.

2. Jawab semua soalan daripada Bahagian A.

Tuliskan jawapan anda dalam ruang yang disediakan.

3. Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C

4. Anda diminta menjawab dengan lebih

terperinci untuk Bahagian B dan Bahagian C. Jawapan mestilah jelas dan logik. Persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda boleh digunakan.

5. Penggunaan kalkulator saintifik yang tidak boleh diprogramkan adalah dibenarkan.

Untuk Kegunaan Pemeriksa

Bahagian Soalan Markah

penuh

Markah

diperoleh

A

1

9

2

9

3

10

4

10

5

11

6

11

B

7

20

8

20

C

9

20

10

20

Jumlah

NAMA:……………………………………… TINGKATAN: ………………


shafarudin.ali

Rectangle

Administrator

Stamp

shafarudin.ali

Typewriter


SULIT 2 4541/2


Section A Bahagian A

[60 marks] [60 markah]

Answer all questions in this section

Jawab semua soalan dalam bahagian ini. 1. (a) Diagram 1 shows the set-up of the apparatus an experiment to study Process I.

Rajah 1 menunjukkan susunan radas bagi satu eksperimen bagi mengkaji Proses I.

Diagram 1.1

Rajah 1.1

(i) Name the process involved in this experiment? Namakan proses yang terlibat? …………………………………………………………………………..

[1 mark]

(ii) State the type of particles present in potassium manganate(VII). Nyatakan jenis zarah dalam kalium manganat(VII). …………………………………………………………………………..

[1 mark]

(iii) Explain the observation in this experiment based on the kinetic theory of matter. Terangkan pemerhatian dalam eksperimen ini berdasarkan teori kinetik jirim.

………………………………………………………………………….. …………………………………………………………………………. ………………………………………………………………………….

[3 marks]

Whole agar turns purple. Seluruh agar menjadi ungu

_

_

_

_

-

-

-

-

_

_

_

-

-

-

-

Solid agar Agar-agar pejal

Solid potassium manganate(VII) Pepejal kalium manganat(VII)


SULIT 3 4541/2


(b) Diagram 1.2 shows the symbols for three atoms of carbon. Rajah 1.2 menunjukkan simbol bagi tiga atom karbon.

Atom Atom

Proton number Nombor proton

Nucleon number Nombor nukleon

C126 6 12

C136 6 13

C146 6 14

Diagram 1.2

Rajah 1.2

(i) Name one subatomic particles present in the nucleus of carbon atom. Namakan satu zarah subatom yang terdapat dalam nukleus atom karbon.

…………………………………………………………………………..

[1 mark]

(ii) C126 , C13

6 and C146 are isotopes.

What is meant by isotope? C12

6 , C136 dan C14

6 adalah isotop. Apakah yang dimaksudkan dengan isotop? …………………………………………………………………………..

[1 mark]

(iii) Determine the number of neutrons for the isotope of carbon-14, C146 .

Tentukan bilangan neutron bagi isotop karbon-14, C146 .

…………………………………………………………………………..

[1 mark]

(iv) State one use of carbon-14, C146

Nyatakan satu kegunaan karbon-14, C146 .

…………………………………………………………………………..

[1 mark]


SULIT 4 4541/2


2 Diagram 2 shows the symbol of atoms of magnesium, aluminium and chlorine. Rajah 2 menunjukkan simbol atom-atom bagi magnesium, aluminium dan klorin.

Diagram 2 Rajah 2

(a) (i) Write the electron arrangement of magnesium atom.

Tuliskan susunan elektron bagi atom magnesium.

………………………………………………………………………….. [1 mark]

(ii) State the position of magnesium in the Periodic Table of Elements.

Nyatakan kedudukan magnesium dalam Jadual Berkala Unsur.

…………………………………………………………………………. [1 mark]

(b) What is the physical state of chlorine at room condition?

Apakah keadaan fizik bagi klorin pada keadaan bilik? …………………………………………………………………………………

[1 mark]

(c) Which element forms an acidic oxide? Unsur manakah membentuk oksida yang bersifat asid? …………………………………………………………………………………..

[1 mark]

(d) Aluminium reacts with oxygen to form aluminium oxide. Aluminium bertindak balas dengan oksigen membentuk aluminium oksida.

(i) Write the chemical formula of aluminium oxide.

Tuliskan formula kimia bagi aluminium oksida. …………………………………………………………………………..

[1 mark] (ii) State the type of bond in aluminium oxide.

Nyatakan jenis ikatan di dalam aluminium oksida. ………………………………………………………………………….

[1 mark]

24

Mg

12

27

Al

13

35.5

Cl

17


SULIT 5 4541/2


(e) 2.4 g magnesium reacts with chlorine to form 9.5 g magnesium chloride.

Determine the empirical formula of magnesium chloride. 2.4 g magnesium bertindak balas dengan klorin membentuk 9.5 g magnesium klorida. Tentukan formula empirik bagi magnesium klorida.

[Relative atomic mass : Mg = 24, Cl = 35.5] [Jisim atom relatif : Mg = 24, Cl = 35.5]

[3 marks]

3 Diagram 3 shows the series of reactions that involve copper(II) nitrate. Rajah 3 menunjukkan siri tindak balas yang melibatkan kuprum(II) nitrat.

Diagram 3 Rajah 3

Reaction I Tindak balas I

Heat Panaskan

Solution R Larutan R

Copper(II) nitrate Kuprum(II) nitrat

Solid X Pepejal X

ColourlessGas Y Gas Y yang tidak berwarna

Brown Gas Z Gas Z yang berwarna perang

+ Hydrochloric acid Asid hidroklorik

Reaction II Tindak balas II

+

+


SULIT 6 4541/2


(a) Copper(II) nitrate is a salt. Kuprum(II) nitrat adalah sejenis garam. (i) State the meaning of salt. Nyatakan maksud garam. ……………………………………..…………………………………………..

[1 mark]

(ii) State the colour of copper(II) nitrate. Nyatakan warna kuprum(II) nitrat. …………………………………………………………………………………

[1 mark] (b) In Reaction I, copper(II) nitrate is heated strongly to form solid X, gas Y and gas

Z. Dalam tindak balas I, kuprum(II) nitrat dipanaskan dengan kuat untuk menghasilkan

pepejal X, gas Y dan gas Z. (i) Name gas Y. Namakan gas Y. .……………………………………………………………………...................

[1 marks]

(ii) Write the chemical formula of gas Z. Tuliskan formula kimia bagi gas Z. ………………………………………………………………………................

[1 mark]

(iii) Write the chemical formula of solid X. Tuliskan formula kimia bagi pepejal X. ………………………………………………………………………................

[1 mark]


SULIT 7 4541/2


(c) In Reaction II, solid X is added into a test tube containing hydrochloric acid to form solution R.

Dalam Tindak balas II, pepejal X ditambah ke dalam sebuah tabung uji yang mengandungi asid hidroklorik untuk membentuk larutan R.

The equation represents the reaction. Persamaan mewakili tindak balas itu.

X + 2HCl R + H2O (i) Name the cation in solution R. Namakan kation dalam larutan R. …………………………………………………………………………………

[1 mark]

(ii) State another substance that can be used to replace solid X to produce solution R.

Nyatakan bahan lain yang boleh digunakan untk menggantikan pepejal X untuk menghasilkan larutan R.

…………………………………………………………………………………

[1 mark]

(iii) 20 cm3 of 0.5 mol dm-3 hydrochloric acid reacts with excess solid X. Calculate the number of molecules of water produced. [ Avogadro constant = 6.02 x 1023 mol-1]

20 cm3 asid hidroklorik 0.5 mol dm-3 bertindak balas dengan pepejal X berlebihan. Hitung bilangan molekul air yang terbentuk. [Pemalar Avogadro = 6.02 x 1023 mol-1]

[3 marks]


SULIT 8 4541/2


4 Diagram 4 shows the apparatus set-up for an experiment to determine the heat of displacement.

Rajah 4 menunjukkan susunan radas bagi satu eksperimen untuk menentukan haba penyesaran.

Diagram 4 Rajah 4 Based on the experiment,

(a) State the meaning of heat of displacement. Nyatakan maksud haba penyesaran.

………………………………………………………………………………….. ……..……………………………………………………………………………

[1 mark] (b) Give one reason why polystyrene cup is used in the experiment.

Berikan satu sebab mengapa cawan polistirena digunakan dalam eksperimen ini.

………………………………………………………………………………… [1 mark]

50 cm3 of 0.2 mol dm-3copper (II) sulphate 50 cm3kuprum(II) sulfat 0.2 mol dm-3

Excess zinc powder Serbuk zink berlebihan

Polystyrene cup Cawan polistirena


SULIT 9 4541/2


(c) The thermochemical equation below represents the displacement reaction. Persamaan termokimia di bawah mewakili tindak balas penyesaran itu.

Zn + CuSO4 ZnSO4 + Cu H = 210 kJ mol-1

Calculate: Hitung:

(i) the number of moles of copper(II) ion.

bilangan mol ion kuprum.

[1 mark]

(ii) the heat released during the reaction. haba yang dibebaskan semasa tindak balas.

[2 marks] (iii) the change of temperature in the experiment.

[Specific heat capacity of solution = 4.2 J g-1 oC-1; Density of solution = 1 g cm-3] perubahan suhu dalam eksperimen ini. [Muatan haba tentu larutan = 4.2 J g-1 oC-1;

Ketumpatan larutan =1 g cm-3]

[1 mark]


SULIT 10 4541/2


(d) The experiment is repeated using magnesium powder to replace zinc powder. The volume and concentration of copper (II) sulphate used is remained the same. Eksperimen diulang dengan menggunakan serbuk magnesium menggantikan serbuk zink. Isi padu dan larutan kuprum(II) sulfat yang digunakan adalah sama.

(i) Predict the heat of displacement for the reaction.

Ramalkan haba penyesaran bagi tindak balas itu.

..………………………………………………………………………… [1 mark]

(ii) Give a reason for your answer in 4(d)(i).

Beri sebab bagi jawapan di 4(d(i). ………………………………………………………………………… ………………………………………………………………………….

[1 mark]

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

[2 marks]


SULIT 11 4541/2


5 Diagram 5.1 and Diagram 5.2 shows the apparatus set-up to investigate the factor that affects the rate of reaction. Rajah 5.1 dan 5.2 menunjukkan susunan radas bagi mengkaji faktor yang mempengaruhi kadar tindak balas.

Diagram 5.1

Rajah 5.1

Table 5.1 shows the result obtained for Experiment I. Jadual 5.1 menunjukkan keputusan yang diperolehi bagi Eksperimen I.

Time (s) Masa (s)

0 20 40 60 80 100 120 140 160 180

Volume of gas released (cm3) Isi padu gas terbebas (cm3)

0.00 6.50 12.50 17.80 23.50 27.20 31.80 35.00 35.00 35.00

Table 5.1 Jadual 5.1

Diagram 5.2 Rajah 5.2

Experiment I Eksperimen I

Gas Y

Experiment II Eksperimen II

Water Air

Zinc powder Serbuk zink

z

Dilute hydrochloric acid Asid hidroklorik cair

Gas Y

Dilute hydrochloric acid Asid hidroklorik cair

Water Air

Zinc granules Ketulan zink

z


SULIT 12 4541/2


Table 5.2 shows the result obtained for Experiment II. Jadual 5.2 menunjukkan keputusan yang diperolehi bagi Eksperimen II.

Time (s) Masa (s)

0 20 40 60 80 100 120 140 160 180

Volume of gas released (cm3) Isi padu gas terbebas (cm3)

0.00 8.50 15.50 21.00 26.80 31.50 35.00 35.00 35.00 35.00


(a) (i) Name gas Y. Namakan gas Y.

…………………………………………………………………………………

[1 mark]

(ii) Describe a chemical test to verify gas Y. Jelaskan satu ujian kimia untuk mengesahkan gas Y.

…………………………………………………………………………………

…………………………………………………………………………………..

[2 marks] (b) (i) Calculate the average rate of reactions for Experiment I and Experiment II.

Hitung kadar tindak balas purata untuk tindak balas bagi Eksperimen I dan Eksperimen II.

Experiment 1: Eskperimen I:

Experiment II: Eksperimen I1:

[2 marks]


SULIT 13 4541/2


(ii) Compare the rate of reaction of Experiment I and Experiment II. Bandingkan kadar tindak balas bagi Eksperimen I dan Ekesperimen II.

……………….………..…………………………………………………………… ……………….………………………………………………………………….

[1 mark]

(iii) Explain the answer in 5(b)(ii) with reference to the collision theory. Terangkan jawapan di 5(b)(ii) dengan merujuk kepada teori perlanggaran.

……………………………………………………………………………….…

………………………………………………………………………..………… …………………………………………………………………………………. …………………………………………………………………………………

[3marks]

(c) Sketch the graph of volume of gas Y produced against time for both experiments on the same axes. Lakar graf isipadu gas Y yang dihasilkan melawan masa bagi kedua-dua eksperimen.

[2marks]

Time ( s) Masa (s)

Volume of gas Y (cm3) Isi padu gas Y (cm 3)


SULIT 14 4541/2


6 (a) Diagram 6 shows the apparatus set-up to study the displacement of halogen between bromine water and potassium iodide solution.

Rajah 6 menunjukkan susunan radas untuk mengkaji tindak balas penyesaran halogen di antara air bromin dan larutan kalium iodida.

Diagram 6

Rajah 6

1,1,1-trichloroethane is added into the mixture and shaken thoroughly. 1,1,1-trikloroetana ditambah ke dalam campuran itu dan digoncang lagi dengan sempurna. (i) State the function of bromine water.

Nyatakan fungsi air bromin. …………………………………………………………………………………..

[1 mark]

(ii) State one observation after 1,1,1-trichloroethane is added to the mixture. Nyatakan satu pemerhatian setelah 1,1,1-trichloroetana ditambah kepada campuran.

…………………………………………………………………………………..

[1 mark]

(iii) Write the ionic equation for the reaction. Tuliskan persamaan ion bagi tindak balas ini.

…………………………………………………………………………………..

[2 marks] (iv) State the change in the oxidation number of iodine. Nyatakan perubahan nombor pengoksidaan bagi iodin.

………………………………………………………………………………….. [1 mark]

Potassium iodide solution Larutan kalium iodida

Bromine water Air bromin


SULIT 15 4541/2


(v) Name another reagent that can replace bromine water. Namakan reagen lain yang boleh menggantikan air bromin.

…………………………………………………………………………………..

[1 mark] (b) An experiment is carried out to study the reactivity of metals with oxygen.

Satu eksperimen telah dijalankan untuk mengkaji kereaktifan logam terhadap oksigen.

Table 6 shows the observations and the colour of the residue for each metal. Jadual 6 menunjukkan pemerhatian dan warna baki pemanasan bagi setiap logam itu.

Metal Logam

Observation Pemerhatian

Colour of Residue Warna Baki

W Glow brightly

Membara terang

Yellow when hot white when cold

Kuning semasa panas putih semasa sejuk

X Glow faintly

Membara malap

Black Hitam

Y Burn brightly Menyala terang

White Putih

Table 6 Jadual 6

(i) Draw the diagram of the apparatus set-up for the experiment. Lukiskan diagram bagi susunan radas bagi eksperimen ini.

[2 marks]


SULIT 16 4541/2


(ii) Suggest metal W. Cadangkan logam W.

………………………………………………………………………………….. [1 mark]

(iii) Based on your answer in 6(b)(ii),

Write the chemical equation for the reaction between metal W and oxygen. Berdasarkan jawapan anda dalam 6(b)(ii), Tuliskan persamaan kimia bagi tindak balas antara metal W dan oksigen.

…………………………………………………………………………………..

[1 mark]

(iv) Based on the observations, arrange metals W, X and Y in descending order of the reactivity towards oxygen. Berdasarkan kepada pemerhatian, susunkan logam-logam W, X and Y mengikut tertib menurun dalam kereaktifan terhadap oksigen.

………………………………………………………………………………….. [1 mark]


SULIT 17 4541/2


Section B Bahagian B


Answer any one questions from this section.

Jawab mana-mana satu soalan daripada bahagian ini

7. (a) Diagram 7.1 shows a frying pan and a water pipe. Rajah 7.1 menunjukkan sebuah kuali dan sebatang paip air.


State the type of glass and polymer to make the glass lid and the water pipe. Give a reason to each of your answer based on the property of each material. Nyatakan jenis kaca dan polimer untuk membuat penutup kaca dan paip air itu. Berikan satu sebab bagi setiap jawapan anda berdasarkan sifat setiap bahan itu. [4 marks]

Water pipe Paip air

Glass lid Penutup kaca



SULIT 18 4541/2


(b) Sulphuric acid is manufactured in industry through Contact Process. The process consists of three stages. Asid sulfurik dihasilkan dalam industri melalui Proses Sentuh. Proses itu terdiri daripada tiga peringkat. Stage 1 Peringkat 1

Molten sulphur is burnt in dry air to produce sulphur dioxide. Leburan sulfur dibakar dalam udara untuk menghasilkan sulfur dioksida. S + O2 SO2

Stage 2 Peringkat 2

Sulphur dioxide and excess oxygen gas are reacted to produce sulphur trioxide. Sulfur dioksida dan gas oksigen berlebihan bertindak balas untuk menghasilkan sulfur trioksida.

2SO2 + O2 2SO3

Stage 3 Peringkat 3

Sulphur trioxide is first reacted with concentrated sulphurid acid to form oleum. The oleum is then diluted with water to produce sulphuric acid. Sulfur trioksida pada mulanya bertindak balas dengan asid sulfurik pekat untuk membentuk oleum. Kemudian oleum itu dicairkan dengan air untuk menghasilkan asid sulfurik.


(i) 8 g of sulphur is burnt completely in Stage 1. Calculate the volume of sulphur dioxide produced. [Relative atomic mass: S = 32 ; Molar volume = 24 dm3 mol-1 at room condition] 8 g sulfur dibakar dengan lengkap dalam Peringkat 1. Hitungkan isi padu sulfur dioksida yang dihasilkan. [Jisim atom relatif: S = 32 ; Isi padu molar = 24 dm3 mol-1 pada keadaan bilik]

[2 marks]

(ii) Describe how sulphur dioxide gas can cause environmental pollution and state two effects of pollution cause by sulphur dioxide gas. Huraikan bagaimana gas sulfur dioksida boleh menyebabkan pencemaran alam sekitar dan nyatakan dua kesan pencemaran yang disebabkan oleh gas sulfur dioksida. [3 marks]

(iii)Write the chemical equation for the formation of oleum in Stage 3. Tuliskan persamaan kimia bagi pembentukan oleum dalam Peringkat 3. [1 mark ]


SULIT 19 4541/2


(c) Diagram 7.2 shows two experiments to investigate the effectiveness of the cleansing action between cleaning agents X and Y. Rajah 7.2 menunjukkan dua eksperimen untuk mengkaji keberkesanan tindakan pencucian antara agen pencuci X dan agen pencuci Y.

Experiment Eksperimen

I II

Cleaning agent Agen pencuci

X Y

Chemical formula

Formula kimia CH3(CH2)14COO-K+ CH3(CH2)11OSO3

-K+

Cleaning in hard

water

Pencucian dalam air liat

Observation Pemerhatian

Oil stain remains Kesan minyak kekal

Oil stain is removed Kesan minyak hilang

(i) Based on Diagram 7.2, compare and contrast the effectiveness of the cleansing action between cleaning agent X and cleaning agent Y in hard water. Explain your answer. Berdasarkan Rajah 7.2, banding dan bezakan keberkesanan tindakan pencucian antara agen pencuci X dan agen pencuci Y dalam air liat. Terangkan jawapan anda.

[5 marks]

Oil stain on a handkerchief Kotoran bergris pada sehelai sapu tangan

Oil stain on a handkerchief Kotoran bergris pada sehelai sapu tangan

Hard water + cleaning agent Y Air liat + agen pencuci Y

Hard water + cleaning agent X Air liat + agen pencuci X



SULIT 20 4541/2


(ii) Diagram 7.3 shows the structure of a particle of agent Y. Rajah 7.3 menunjukkan struktur bagi suatu zarah agen Y.

Part P Part Q Bahagian P Bahagian Q


State the name of part P and part Q. Explain the role of part P and part Q in the cleansing action. Nyatakan nama bahagian P dan bahagian Q. Terangkan peranan bahagian P dan bahagian Q dalam tindakan pencucian.

[5 marks]


SULIT 21 4541/2


8 (a)

Diagram 8.1 shows a chemical cell and an electrolytic cell. Metal P is situated below zinc in the electrochemical series. Rajah 8.1 menunjukkan satu sel kimia dan satu sel elektrolisis. Logam P terletak di bawah zink dalam siri elektrokimia.


Based on Diagram 8.1, state: Berdasarkan Rajah 8.1, nyatakan:

the negative terminal for chemical cell and electrolytic cell. terminal negatif untuk sel kimia dan sel elektrolisis tersebut.

the flow of direction of electron for the chemical cell and electrolytic cell. arah pengaliran elektron bagi sel kimia dan sel elektrolisis tersebut.

[ 4 marks]

Magnesium electrode Elektrod magnesium

Zinc electrode Elektrod zink

P electrode Elektrod P

P nitrate solution Larutan P nitrat

Chemical cell Sel kimia

Electrolytic cell Sel elektrolisis


SULIT 22 4541/2


(b)

A student wants to electroplate iron spoon with silver metal to make it more shining and attractive. The following are materials that used in the electroplating process. Seorang pelajar ingin menyadur sudu besi dengan logam argentum agar kelihatan berkilat dan menarik. Berikut adalah bahan-bahan yang digunakan dalam proses penyaduran tersebut. Referring to the above materials, plan one laboratory experiment to electroplate the iron spoon. Your answer should include the following : Merujuk pada bahan-bahan di atas, rancangkan satu eksperimen makmal bagi proses penyaduran sudu besi tersebut. Jawapan anda perlu mengandungi perkara berikut:

A labelled diagram showing the apparatus set-up.

Gambar rajah berlabel menunjukkan susunan radas.

Procedure of experiment Prosedur eksperimen

The half-equations for the reaction at cathode or anode. Setengah persamaan bagi tindak balas yang berlaku di katod atau di anod.

[6 marks]

Silver plate Kepingan argentum

Iron spoon Sudu besi

Silver sulphate solution Larutan argentum sulfat


SULIT 23 4541/2


(c) Diagram 8.2 shows the set-up of apparatus for a chemical cell. Metal Q is placed above copper in the electrochemical series and act as a positive terminal in the chemical cell. Rajah 8.2 menunjukkan susunan radas bagi satu sel kimia. Logam Q terletak di atas kuprum dalam siri elektrokimia dan berfungsi sebagai terminal positif dalam sel kimia itu.


Describe how the set-up of apparatus can be function as a chemical cell. Your answer should include : Terangkan bagaimana susunan radas itu boleh berfungsi sebagai sel kimia. Jawapan anda haruslah mengandungi:

the suitable name of metal Q and Q solution nama logam Q dan larutan Q yang sesuai

the direction of flow of electrons arah pengaliran elektron

the half equations for the reaction at positive and negative terminals setengah persamaan tindak balas yang berlaku di terminal positif dan negatif

an ionic equation for the reaction persamaan ion bagi tindak balas

the function of porous pot fungsi pasu berliang

the observations after 30 minutes the reaction occur pemerhatian selepas 30 minit tindak balas berlaku

[10 marks]

V

Aluminium plate Kepingan aluminium

Metal Q Logam Q

Porous Pot Pasu berliang Aluminium nitrate solution

Larutan aluminium nitrat Q solution Larutan Q


SULIT 24 4541/2


9. (a) By using suitable examples, state two applications of neutralisation in daily life . Dengan menggunakan contoh yang sesuai, nyatakan dua aplikasi peneutralan dalam kehidupan harian.

[4 marks]

(b) Diagram 9 shows the pH values for solutions of alkali Q and alkali R which have same concentration. Rajah 9 menunjukkan nilai pH bagi alkali Q dan alkali R yang mempunyai kepekatan yang sama.

Diagram 9

Rajah 9

By using one named example for each alkali, explain why the pH values of the alkalis are different.

Dengan menamakan satu contoh bagi setiap alkali, terangkan mengapa nilai pH bagi setiap alkali itu berbeza.

[ 6 marks]

( c ) Solution X and solution Y are used to prepare barium carbonate salt. Describe the preparation of barium carbonate salt in the laboratory. In your description, include the chemical equation involved.

Larutan X dan larutan Y digunakan untuk menyediakan garam barium karbonat. Huraikan penyediaan garam barium karbonat dalam makmal. Dalam huraian anda, sertakan persamaan kimia yang terlibat.

[ 10 marks]

Alkali Q Alkali R

10 14


SULIT 25 4541/2


10(a) Diagram 10.1 shows the structural formulae of compound A and compound B. Rajah 10.1 menunjukkan formula struktur bagi sebatian A dan sebatian B.

Compound A Compound B Sebatian A Sebatian B

Diagram 10.1 Rajah 10.1 Compound A and compound B are burnt completely in oxygen to produce carbon dioxide gas and water. Sebatian A dan sebatian B terbakar lengkap dalam oksigen menghasilkan gas karbon dioksida dan air. (i) Name compound B. Namakan sebatian B. (ii) Compound B produced more soot than compound A when burnt in oxygen.

Explain why. Sebatian B menghasilkan lebih jelaga daripada sebatian A apabila terbakar dalam

oksigen. Terangkan mengapa. [Relative molecular mass of: A = 86, B = 84] [Jisim molekul relatif: A = 86, B = 84]

[4 marks]


SULIT 26 4541/2


(b) Diagram 10.2 shows the structural formulae of compound J and compound K. Rajah 10.2 menunjukkan formula struktur bagi sebatian J dan sebatian K.

Compound J Compound K Sebatian J Sebatian K


State one physical property of compound K . Describe briefly a chemical test to differentiate between compound J and compound K. Nyatakan satu sifat fizik Sebatian K. Huraikan secara ringkas satu ujian kimia untuk membezakan antara sebatian J dan sebatian K.

[6 marks]

(c) Alcohols undergo dehydration reaction to produce alkenes and water. Describe how to prepare an alkene from a named alcohol through dehydration process. In your description, include the diagram of the apparatus set-up and balanced chemical equation for the reaction. Alkohol mengalami tindak balas pendehidratan untuk menghasilkan alkena dan air. Huraikan bagaimana satu alkena disediakan daripada alkohol yang dinamakan melalui proses pendehidratan. Dalam huraian anda, sertakan gambar rajah bagi susunan radas dan persamaan kimia seimbang bagi tindak balas itu.

[10 marks]


KERTAS SOALAN TAMAT


4541/3 © 2013 Hak Cipta BPSBPSK [Lihat sebelah SULIT

Untuk Kegunaan Pemeriksa

Soalan Markah Penuh

Markah Diperoleh

1 15

2 18

3 17

Jumlah 50

Nama: ………………………………………………………………. Tingkatan: …………… SULIT

4541/3

Chemistry

Kertas 3

Ogos

2013

1 ½ jam

BAHAGIAN PENGURUSANSEKOLAH BERASRAMA PENUH





CHEMISTRY

Kertas 3

Satu jam tiga puluh minit


1. Tuliskan nama dan tingkatan pada ruang yang

disediakan di atas.

2. Kertas soalan ini adalah dalam dwibahasa.

3. Soalan dalam bahasa Inggeris mendahului

soalan yang sepadan dalam Bahasa Melayu.

4. Calon dibenarkan menjawab keseluruhan atau

sebahagian soalan sama ada dalam Bahasa

Inggeris atau Bahasa Melayu.

5. Calon dikehendaki membaca maklumat di

halaman belakang kertas soalan ini.



shafarudin.ali

Rectangle

Administrator

Stamp

shafarudin.ali

Typewriter


2

Answer all questions Jawab semua soalan

1. Diagram 1.1 shows the apparatus set-up for an experiment to determine the

melting point of naphthalene. The temperature reading of naphthalene is recorded at one minute intervals until the temperature is above its melting point. Rajah 1.1 menunjukkan susunan radas bagi satu eksperimen untuk menentukan takat lebur naftalena. Bacaan suhu direkodkan pada sela masa satu minit sehingga melebihi takat lebur naftalena.

For examiner’s use

Diagram 1.1

Rajah 1.1

Thermometer Termometer

Boiling tube Tabung didih

Water Air

Naphthalene Naftalena


3

Diagram 1.2 shows the recorded thermometer readings at one minute intervals.

Rajah 1.2 menunjukkan bacaan termometer yang direkodkan pada sela masa satu minit.


Temperature at Suhu pada 0 min: …………..

Temperature at Suhu pada 1 min: ……………..

Temperature at Suhu pada 2 min: ……………

Temperature at Suhu pada 3 min: …………

Temperature at Suhu pada 4 min: …………….

Temperature at Suhu pada 5 min: ……………

Temperature at Suhu pada 6 min: ……………..

Temperature at Suhu pada 7 min: .…………

Diagram 1.2

Rajah 1.2


4

(a) Record all the temperatures in the spaces provided in Diagram 1.2

Rekodkan suhu pada ruang yang disediakan dalam Rajah 1.2. [3 marks]

[3 markah]

For examiner’s use 1(a)

(b) On the graph paper provided, plot a graph of temperature against time for the heating of naphthalene. Pada kertas graf yang disediakan, plot satu graf suhu melawan masa bagi pemanasan naftalena.


1(b)

(c) Based on the graph in (b); Berdasarkan graf di (b);

(i) Determine the melting point of naphthalene. Show on the graph how you determine this melting point. Berdasarkan graf di (b), tentukan takat lebur naftalena. Tunjukkan pada graf bagaimana anda menentukan takat lebur tersebut. ……………………………………………………………………………..


1(c)(i)

(ii) How does graph in 1(b) shows the melting point of naphthalene? Bagaimanakah graf di 1(b) dapat menunjukkan takat lebur naftalena? ……………………………………………………………………………. ……..……………………………………………………………………… …………..…………………………………………………………………


1(c)(ii)


5

Graph of temperature against time.

Graf suhu melawan masa



6

(d)

The temperature of naphthalene did not change from the 2nd minute until 4th minute during the heating process. Explain why? Suhu naftalena tidak berubah dari minit ke-2 sehingga minit ke-4 semasa proses pemanasan naftalena. Terangkan mengapa? ………………………………………...………………………………………… ………..………………………………………………………………………… ………………..…………………………………………………………………


For examiner’s use 1(d)

TOTAL


7

2. Diagram 2.1 shows the apparatus set-up of the experiment to investigate the

effect of other metal on rusting of iron. A mixture of jelly solution, potassium hexacyanoferrate (III), K3Fe(CN)6 solution and phenolphthalein were used as medium in each test tube. The observation was recorded after one day. Rajah 2.1 menunjukkan susunan radas bagi eksperimen untuk mengkaji kesan logam lain terhadap pengaratan besi. Medium yang digunakan di dalam setiap tabung uji adalah campuran larutan agar-agar, larutan kalium heksasianoferat (III), K3Fe(CN)6 dan fenolftalein. Pemerhatian direkodkan selepas satu hari.


Test tube Set-up of apparatus

A

B

C

D

Diagram 2.1

Rajah 2.1

Iron nail coiled with magnesium ribbon Paku besi dililit dengan pita magnesium

Iron nail coiled with copper strip Paku besi dililit dengan kepingan kuprum

Iron nail coiled with zinc strip Paku besi dililit dengan kepingan zink

Iron nail Paku besi

Jelly solution + potassium hexacyanoferrate(III) + phenolphthalein larutan agar-agar, larutan kalium heksasianoferat (III) + fenolftalein

Jelly solution + potassium hexacyanoferrate(III) + phenolphthalein larutan agar-agar, larutan kalium heksasianoferat(III) + fenolftalein




8

(a)

Table 2.1 shows the result of the experiment. State the inference for each test tube. Jadual 2.1 menunjukkan keputusan eksperimen tersebut. Nyatakan inferens untuk setiap tabung uji.


Test tube A B C D Intensity of blue colour Keamatan warna biru

None Tiada

High Sangat tinggi

None Tiada

Low Rendah

Pink colouration Warna merah jambu

Present Ada

Present Ada

Present Ada

Present Ada

Inference Inferens



2(a)

(b) State the hypothesis for the experiment. Nyatakan hipotesis bagi eksperimen tersebut. ………………………………………………………………………………...… ………………………………………………………………………………...… ………………………………………………………………………………..… …………………………………………………………………………………..


2(b)


9

(c) State the variables for this experiment.

Nyatakan pembolehubah bagi eksperimen ini.


(i) The manipulated variable: Pembolehubah dimanipulasikan: ………………………………………………………………………….....

(ii) The responding variable: Pembolehubah bergerak balas: ……………………………………………………………………………

(iii) The constant variable: Pembolehubah dimalarkan: ……………………………………………………………………………


2(c)

(d) State the operational definition for the rusting of iron. Nyatakan definisi secara operasi bagi pengaratan besi. …………………………………………………………………………………… …………………………………………………………………………………… ……………………………………………………………………………………


2(d)


10

(e) Based on the experiment, classify the metals that can provide sacrificial protection and metals that cannot provide sacrificial protection to iron. Berdasarkan eksperimen ini, kelaskan logam-logam tersebut kepada logam yang boleh menyediakan perlindungan korban dan logam yang tidak boleh menyediakan perlindungan korban.


2(e)

(f) Metal Y is placed below copper in Electrochemical Series.

Predict one observation when metal Y is coiled with iron nail and dipped into the mixture of jelly solution, potassium hexacyanoferrate(III), K3Fe(CN)6 solution and phenolphthalein. Logam Y terletak di bawah kuprum dalam Siri Elektrokimia. Ramalkan satu pemerhatian apabila logam Y dililitkan pada paku besi dan dicelupkan ke dalam campuran larutan agar-agar, larutan kalium heksasianoferat(III) K3Fe(CN)6 dan fenolftalein. ……………………………………………………………………………………


For examiner’s use 2(f)

TOTAL


11

3 Diagram 3.1 shows the production of ammonia, NH3 through Haber process. The mixture

of nitrogen and hydrogen gases is passed over iron, Fe. Iron acts as the catalyst to increase the rate of the production of ammonia gas. Rajah 3.1 menunjukkan penghasilan ammonia, NH3 melalui proses Haber. Campuran gas nitrogen dan gas hidrogen dialirkan melalui serbuk besi. Besi bertindak sebagai mangkin yang meningkatkan kadar penghasilan gas ammonia.

Diagram 3.1

Rajah 3.1

Based on this idea, plan one laboratory experiment to investigate the effect of the presence of catalyst on the rate of decomposition of hydrogen peroxide, H2O2. Berdasarkan idea ini, rancangkan satu eksperimen makmal untuk mengkaji kesan kehadiran mangkin ke atas kadar penguraian hidrogen peroksida, H2O2.

Your planning should include the following aspects: Perancangan anda hendaklah mengandungi aspek-aspek berikut:

(a) Problem statement Penyataan masalah

(b) All the variables Semua pemboleh ubah

(c) Statement of the hypothesis Pernyataan hipotesis

(d) List of substances and apparatus Senarai bahan dan radas

(e) Procedure for the experiment Prosedur eksperimen

(f) Tabulation of data Penjadualan data



KERTAS SOALAN TAMAT

Iron, Fe

450oC



4541/3 © 2013 Hak Cipta BPSBPSK [Lihat sebelah SULIT

INFORMATION FOR CANDIDATES

MAKLUMAT KEPADA CALON

1. This question paper consists of three questions. Question 1, Question 2 and Question 3. Kertas soalan ini mengandungi tiga soalan: Soalan 1, Soalan 2 dan Soalan 3. 2. Answer all questions. Write your s answer for Question 1 and Question 2 in the spaces provided in this question paper. Jawab semua soalan. Tuliskan jawapan bagi Soalan 1 dan Soalan 2 pada ruang yang disediakan dalam kertas soalan. 3. Write your answers for question 3 on the addition answer sheets provided by invigilators. You may use equations, diagrams, tables, graph and other methods to explain your answer. Tulis jawapan anda bagi Soalan 3 di dalam helaian tambahan yang dibekalkan oleh pengawas peperiksaan.Anda boleh menggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda. 4. The diagram in the questions is not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan. 5. The marks allocated for each question or sub-part of a question is shown in brackets. Markah yang diperuntukkan bagi setiap jawapan atau ceraian soalan ditunjukkan dalam kurungan. 6. Show your working, it may help you to get marks. Tunjukkan kerja mengira. Ini membantu anda mendapatkan markah, 7. If you wish to change your answer, cross out the answer that you have done. Then write down the new answer. Sekiranya anda hendak menukar jawapan, batalkan jawapan yang telah dibuat,kemudian tulis jawapan yang baru. 8. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak diprogramkan. 9. Tie the addition answer sheets together with this question paper and hand in at the end of the examination. Ikat semua kertas jawapan anda bersama-sama soalan ini di akhir peperiksaan.

Marks awarded:

Mark Description

3 Excellent : The best response

2 Satisfactory : An average response

1 Weak : An inaccurate response

0 No response or wrong response


1


CHEMISTRY

SKEMA JAWAPAN KERTAS 1

1 A 11 A 21 D 31 B 41 D

2 D 12 A 22 B 32 D 42 B

3 A 13 C 23 A 33 B 43 D

4 C 14 D 24 C 34 D 44 A

5 D 15 B 25 C 35 D 45 B

6 C 16 B 26 C 36 C 46 C

7 C 17 A 27 A 37 D 47 D

8 A 18 A 28 B 38 B 48 B

9 C 19 C 29 A 39 D 49 B

10 D 20 C 30 B 40 A 50 C


2

KERTAS 2

SECTION A

No Rubric Mark

1(a) (i) Diffusion r. diffuse 1

(ii) Ion 1

(iii) 1. Potassium manganate(VII) is made of tiny and discrete particles/ions

2. The particles are constantly moving/vibrate and rotate 3. The particles move into spaces between agar particles//

there are spaces between agar particles// the particles move from high concentration area to low concentration region

1 1 1

(b) (i) Proton // neutron r. p/n 1

(ii) Atoms that have the same proton number but difference nucleon number.

1

(iii) 8 1

(v) To estimate the age of fossil 1

TOTAL 9


3

No Rubric Mark

2 (a)(i) 2.8.2

1

(ii) Group 2, Period 3 1

(b) Gas 1

(c ) Chlorine/ Cl 1

(d) (i) (ii)

Al2O3 Ionic r: ionic compound

1 1

(e) Mass Mg Cl 2.4 g 7.1 g Mol 0.1 0.2 Ratio 1 2 Formula : MgCl2

1 1 1

TOTAL 9


4

No Rubric Mark

3 (a) (i) ionic compound formed when the hydrogen ion from an acid is replaced by a metal ion or ammonium ion

(ii) Blue

1 1

(b) (i) Oxygen (ii) NO2 (iii) CuO

1 1 1

(c) (i) Copper(II) ion (ii) Copper(II) carbonate / CuCO3

1 1

(d) 1. Mol of HCl = 0.5 x 20 /1000// 0.01 mol 2. Mol of H2O= 0.005 3. No. of H2O molecules = 0.005 x 6.02 x 10 23 // 3.01 x 10 21

1 1 1

TOTAL 10


5

No Rubric Mark

4 (a) Heat change / released when one mole of copper is displaced from/ copper(II) sulphate solution by zinc

1

(b) Polystyrene is a heat insulator / / to reduce heat loss to surroundings r: to prevent

1

(c) (i)

(ii)

(iii)

No of moles of Copper(II) ion = 0.2 x 50 // 0.01 mol 1000

1. 1 mol of Cu is displaced produce 210 kJ heat

2. 0.01 mol of Cu = 0.01 x 210 kJ

// 2.1 kJ / 2100 J

2100 J = 50 x 4.2 x // = 10oC

1

1

1

1

(d) (i)

(ii)

More than -210 kJ mol-1 / Higher / Increases

Magnesium is more electropositive than zinc // magnesium is higher than zinc in electrochemical series // distance between Mg – Cu is further than Zn-Cu in electrochemical series

1

1

(e) 1. Label energy and diagram has 2 different energy levels for exothermic reaction 2. Balanced chemical / ionic equation, H is written

1

1

TOTAL 10

Energy

ZnSO4 + Cu / Zn2+ + Cu

Zn + CuSO4 / Zn + Cu2+

H = -210 kJ mol-1


6

No Rubric Mark 5(a) (i) Hydrogen

1

(ii) Place/ insert a lighted splinter into a test tube Produce ”pop” sound

1 1

(b)(i) Experiment 1: Average rate of reaction: = 35/ 140 cm3s-1 or 0.25 cm3s-1

Experiment II: Average rate of reaction: = 35/120 cm3s-1 or 0.29 cm3s-1

1 1

(ii) Rate of reaction in Experiment II is higher

1

b(iii) In Experiment II , 1. Size of zinc in is smaller// Total surface area of zinc in

Experiment II is bigger 2. Frequency of collision between zinc atom and hydrogen ion is

higher 3. Frequency of effective collisions between zinc atom and

hydrogen ion is higher

1 1 1

(c ) Volume of gas Y (cm3)

1. Correct shape of graf and smooth 2. Label the curve correctly

1 1

Total 11

Experiment II

Time ( s)

Experiment I


7

No. Rubric

Marks

6(a)(i) oxidizing agent / to oxidize iodide ion

1

(ii) Purple layer formed 1 (iii) Br2 + 2I- 2Br– + I2

1. First mark for correct formulae of reactants and products 2. Balanced the equation

1 1

(iii) –1 0 1

(iv) Chlorine r: Fluorine

1

(b)(i)

1. Functional diagram 2. Label; Potassium manganate(VII), glass wool, metal

1 1

(ii) Zinc / Zn

1

(iii)

2Zn + O2 2ZnO 1

(iv) Y, W , X 1

Total 11

Heat Panaskan

Heat Panaskan

Potassium manganate(VII) Kalium

manganat(VII)

Glass wool Wul kaca

Metal powder Serbuk logam


8

SECTION B

No Mark scheme Mark Σ Mark

7(a)

P1: Borosilicate glass P2: It has a lower thermal expansion coefficient // high resistant to heat// more resistant to chemical attack. P3: Polyvinyl chloride

P4: It does not rust a: Light

1 1 1 1

4

7(b)(i)

Number of moles of sulphur = 832 // 0.25 mol Volume of sulphur dioxide = 0.25 24 = 6 dm3 // 6000 cm3

[unit ‘mol’ and ‘dm3 ‘ / ‘cm3’ must be stated]

1 1 2

7(b)(ii)

P1: Sulphur dioxide dissolves in water/ rain water to produce acid solution/acid rain.

Any two correct answers: P2: Acid rain can corrode buildings /metal structures P3: Lake and river become acidic P4: pH of soil decreases P5: Destroys trees/forest

1 1 1

3

7(b)(iii)

SO3 + H2SO4 H2S2O7 1 1

7(c)(i)

P1: Y is more effective than X in hard water. P2: Hard water contains magnesium or calcium ions. P3: X form scum/insoluble salt with magnesium /calcium ion P4: Y does not form scum/insoluble salt. P5: Amount of agent X is reduced// amount of agent Y is remains

1 1 1 1 1

5

7(c)(ii)

P1: Part P = Hydrophobic P2: Part Q = Hydrophilic P3: Hydrophobic part dissolves in the grease/ oil P4: Hydrophilic part dissolves in the water P5: This reduces the surface tension// Increase the wetting ability of water r: Like / dislike

1 1 1 1 1

5

Total 20



9

No Answer Mark Total Mark

8 (a) (b)

Voltaic cell Electrolytic cell Negative terminal Zinc P The flow of electron Zinc to P through

external circuit

Magnesium to P through external circuit

r: showing the answer in the diagram

Functional diagram (not include rheostat) Silver plate is connect to positive terminal and iron spoon

connect to negative terminal. Procedure:

1. Iron spoon is cleaned with sand paper 2. a beaker is half fulled with silver sulphate solution 3. iron spoon and silver plate are dipped into the silver

sulphate solution 4. iron spoon is connected to the negative terminal and silver

plate is connected to the positive terminal. 5. half equation:

Anode/ Silver plate : Ag → Ag+ + e // Cathode/ Iron spoon : Ag+ + e → Ag

[Anode/silver plate or cathode/Iron spoon must be stated]

1 + 1

1 + 1

1 1

1 1 1 1 1

4

Max 6

Iron spoon Silver plate

Silver sulphate solution

A


10

(c)

1. metal Q : eg: Zinc [Zn/Fe/Sn/Pb] 2. Q solution: eg: zinc nitrate 3. Flow of electron : Aluminium plate to zinc plate through

connecting wire/ external circuit 4. Negative terminal : Al → Al3+ + 3e 5. Positive terminal : 2H+ + 2e → H2 6. Ionic equation: 2Al + 6H+ → 2Al3+ 3H2 7. Function of porous pot : to allow the movement of ions // to

balance the total charges between solution 8. Observations:

Aluminium plate become thinner// Mass decreases// size become smaller

Colourless bubble gas produce

1 1 1 1 1

1 + 1 1 1 1

10

TOTAL 20

SECTION C

NO RUBRIC MARK ∑MARK

9 (a) Daily application of neutralisation 1. Ammonia : neutralize organic acid produced by

bacteria// to prevent latex from coagulate/remain as liquid

2. Antacid/ health salt/ sodium hydrogen carbonate : neutralised acid in stomach of gastric patients

3. Lime /quick lime (calcium oxide)/ slaked lime (calcium hydroxide), chalk (calcium carbonate) : neutralised acidic soil

4. Magnesium hydroxide / toothpaste: neutralised acid produced by bacteria in our mouth

[Accept other suitable examples and usage] Any 2

1+1

1+1

4 (b) 1. Example of R ; sodium hydroxide solution/ litium hydroxide

solution/ potassium hydroxide solution 2. R ionised completely in water and produced high concentration of OH- ions 3. Exampleof Q : ammonia aqueous / solution 4. Q ionised partially in water and produce low concentration of OH- ions 5. the concentartion of OH – ions in R is higher than Q

1

1+1 1

1+1 1

Max 6


11

(c)

1. Solution 1 : barium nitrate /barium chloride solution 2. Solution 2 : sodium carbonate/ potassium

carbonate/lithium carbonate solution/ H2CO3 [Any pair of solution above]

3. Procedure : 1. Pour solution 1 into a beaker 2. Add solution 2 into the beaker/solution 1 3. Stir the mixture using glass rod 4. Filter the mixture 5. Rinse the residue with distilled water 6. Dry the precipitate/solid/salt/residue in between

sheet of filter papers to dry 4. Equation

Sample answer: Ba(NO3) 2 + Na2CO3 BaCO3 + 2NaNO3 // BaCl2 + Na2CO3 BaCO3 + 2NaCl

Correct reactant & product Balanced

1 1

1 1 1 1 1 1

1 1

10

Total 20

No Explanation Mark ∑ mark 10 (a)(i)

Hex-1-ene r: hexene

1

1

(ii)

1. Percentage of carbon in compound B is higher

2. Percentage carbon in compound A = 72/86 x 100 % / 83.72% Percentage carbon in compound B = 72/84 x 100 % /85.71%

1

1 1

3


12

(b) Soluble in water/ miscible in water Low melting point/ volatile Colourless liquid Cannot conduct electricity

Any 1

1. Pour compound J and K into two different test tubes 2.Put magnesium ribbon / calcium carbonate / any suitable metal/carbonate metal into both test tubes 3. Place a lighted wooden splinter into the test tube// gas release is pass through the lime water 4. If ‘pop’ sound produced// lime water turns cloudy shows the compound is J 5. If no change the compound is K

1

1 1 1 1 1

6

(d)

Sample answer:

1. Name of alcohol 2. Place glass wool in a boiling tube 3. Add a few drops of alcohol to the glass wool 4. Clamp the boiling tube horizontally 5. Place a porcelain chips in the middle of the boiling tube 6. Heat the porcelain chips strongly 7. Heat the alcohol/glass wool 8. Collect the gas produced in a test tube 9. Functional diagram 10. Label : Glass wool damped with alcohol, porcelain chips, water, heat 11. Equation: C2H5OH → C2H4 + H2O

1 1 1 1 1 1 1 1 1 1 1

10

Total 20


13

KERTAS 3

No. Mark scheme Score

1(a) Able to record all readings accurately to one decimal point with correct unit. Answer : 70.0 oC, 77.0 oC, 83.0 oC, 83.0 oC, 83.0 oC, 84.0 oC, 89.0 oC, 95.0 oC

3

Able to record all readings without unit and no decimal point 2

Able to record at least 6 readings. 1

No response / wrong response 0


1(b) Able to plot a graph correctly which fulfills the following criteria. Answer : 1. both axes are labeled and with correct units Y axis : temperature, (oC) X axis : time, min 2. uniform scale 3. all points are transferred correctly 4. smooth and correct curve 5. the size of the graph must ≥ 50% of the graph paper.

3

Able to plot a graph at least fulfill three of the criteria.

2

Able to have an idea to plot a graph Example answer: 1. graph axis 2. a curve

1


Temperature

Time, t (s)



14


1(c)(i) Able to state all 3 criteria correctly 1. mark on the graph to show melting point 2. label the melting point on the graph and 3. state the melting point, 83.0 o C Answer: 1. 2. show 83.0 o C / write the melting point on the graph 3. 83.0 o C

3

Able to state at least two criteria correctly

2

Able to state at least one criteria correctly

1



(c)(ii) Able to state the meaning of melting point based on the heating graph correctly. 1. The temperature is constant in 2nd minute to 4th minute 2. at 83.0 o C 3. Where solid becomes liquid. Sample answer: 1. The temperature which doesn’t change / constant within a certain period of time / 2nd to 4th minute 2. at 83.0 o C 3. Where solid becomes liquid.

3

Able to state any two criteria correctly.

2

Able to state any one criteria correctly or an idea of melting point.

1


83

Temperature

Time, t (s)


15


(d) Able to explain why the temperature of naphthalene from 2nd minute to 4th minute did not change during the heating process correctly. Answer : 1.Heat energy absorbed by the particles /molecules, is 2. Used to overcome the forces between particles / molecules.

3

Able to explain why the temperature of naphthalene did not change from 2nd minute to 4th minute during the heating process. Sample answer: 1. Heat absorbed. 2. Used to overcome the forces between particles / molecules.

2

Able to an idea of why the temperature does not change during the heating process. Example : Heat is absorbed// Solid become liquid//

1


Q Mark scheme Score

2(a) Able to state all inferences correctly

Test tube A B C D

Inference Iron nail does not rust // Fe2+ does not present

Iron nail rust // Fe2+ present / formed

Iron nail does not rust // Fe2+ does not present

Iron nail rust // Fe2+ present / formed

3

Able to state 3 inferences correctly 2

Able to state any one inference correctly 1



16

Q Mark scheme Score

2(b) Able to state the hypothesis correctly Sample answer: When a more electropositive metal / higher than iron in Electrochemical series is in contact with iron, iron (nail) does not rust. When a less electropositive metal / lower than iron in Electrochemical series is in contact with iron, iron (nail) rust.

3

Able to state the hypothesis less correctly Sample answer: When a more electropositive metal / higher than iron in Electrochemical series is in contact with iron, iron (nail) does not rust. or When a less electropositive metal / lower than iron in Electrochemical series is in contact with iron, iron rust. or The rusting of iron is faster/slower, if a less /more electropositive metal is in contact with iron/Fe.

2

Able to give an idea of hypothesis Sample answer: Iron rust when in contact with other metal // other metal affect the rusting of iron.

1


Q Answer Score

2(c) Able to state all the variables in this experiment correctly Sample answer: Manipulated variable: Type / different metal Responding variable: Rusting // presence of blue spot Constant variable: Type of nail iron // iron// medium in which the iron are kept

3

Able to state any two of the variables in this experiment correctly

2

Able to state any one of the variables in this experiment correctly

1



17

Q Answer Score

2(d) Able to state all 3 criteria correctly Sample answer: 1. Rusting of iron is the formation of blue spot / colouration 2. When iron nail is coiled / in contact with a less electropositive metal (copper) / metal located below iron in Electrochemical series. 3. Immersed / dipped / placed / put in a mixture of jelly solution, potassium hexacyanoferrate(III) and phenolphthalein.

3

Able to state at least two criteria correctly Sample answer: 1. Rusting of iron is the formation of blue spot / colouration 2. When iron nail is coiled / in contact with a less electropositive metal

2

Able to state any one criteria correctly Sample answer: 1. Rusting of iron is the formation of blue spot / colouration or 2. When iron nail is coiled / in contact with a less electropositive metal

1


Q Answer Score

2(e) Able to classify the metals into metal that can provide sacrificial protection and metal that cannot provide sacrificial protection correctly. Answer: Metal that can provide sacrificial protection: magnesium /Mg and zinc /Zn Metal that cannot provide sacrificial protection : copper/Cu

3

Able to classify any two metals correctly

2

Able to classify one metals correctly

1


Q Answer Score

2(f) Able to predict the observation correctly. Answer : The intensity of blue spot/colouration is very high // higher than test tube B.

3

Able to predict the observation Answer: Blue spot/ colouration formed

2

Able to state idea of observation Answer:

1


18

Blue


Q Answer Score

3(a) Able to state the problem statement of the experiment correctly. How does the presence of catalyst / manganese (IV) oxide affect on the rate of decomposition of hydrogen peroxide? How does the presence of catalyst affect the rate of reaction? To investigate the effect/ presence of catalyst. Students give a wrong response.

3

2

1

0

3(b) Sample answer: Manipulated variable: The presence of catalyst/ manganese (IV) oxide Responding variable: rate of reaction// rate of decomposition of hydrogen peroxide Constant variable: Concentration and temperature of hydrogen peroxide.

Students able to write all 3 variables correctly Students able to write 2 variables correctly Students able to write 1 variable correctly Students give a wrong response.

3

2

1

0

3(c) Able to state the relationship between the manipulated variable and the responding variable and state the direction. Sample answer: When catalyst/ manganese (IV) oxide presents, the rate of decomposition of hydrogen peroxide increases When catalyst presents, the rate of reaction increases. Catalyst affects the rate of reaction. Students give a wrong response.

3

2

1

0


19

Q Answer Score

3(d) Able to give complete list of substances and apparatus Method 1: Substances: Hydrogen peroxide, manganese (IV) oxide powder Apparatus: Test tube, measuring cylinder, spatula, wooden splinter. Students able to list down substances and improperly apparatus Substances: Hydrogen peroxide, manganese (IV) oxide powder Apparatus: Test tube, spatula Students able to list one of the substance and suitable container Substances: Hydrogen peroxide and manganese (IV) oxide powder Apparatus: Beaker Students give a wrong response.

3

2

1

0

3(d) Method 2: Able to give complete list of substances and apparatus Substances: Hydrogen peroxide, manganese (IV) oxide powder Apparatus: Conical flask, delivery tube and stopper, burette, basin/ water trough, retort stand with clamp, stopwatch, measuring cylinder, spatula. Students able to list down substances and improperly apparatus Substances: Hydrogen peroxide, manganese (IV) oxide powder Apparatus: Conical flask, delivery tube and stopper, burette, basin/ water trough, retort stand with clamp, stopwatch. Students able to list one of the substance and suitable container Substances: Hydrogen peroxide, manganese(IV) oxide powder Apparatus: Conical flask, delivery tube and stopper, burette, basin/ water trough Students give a wrong response.

3

2

1


20

Q Answer Score

3(e) Method 1: Able to list all the steps correctly Procedure:

1. Measure and pour (2 - 5) cm3 of hydrogen peroxide in a test tube. 2. Add 1 spatula of manganese (IV) powder into the test tube 3. Put a glowing splinter into the test tube. 4. Observe and record the changes on the glowing splinter. 5. Repeat steps 1 to 4 without adding manganese (IV) oxide/ catalyst.

Able to write steps 1, 2, 4, 5 improperly. Able to write steps 1&2 less correctly. No response / wrong response.

3

2

1

0

3(e) Method 2: Able to list all the steps correctly Procedure:

1. Fill a basin/ water trough with water. 2. Fulfill a burette with water and invert it in onto water in a basin/ water

trough. 3. Clamp the burette by using a retort stand. Record the initial burette

reading. 4. Measure and pour (20 - 100) cm3 of hydrogen peroxide in a conical flask. 5. Add 1 spatula of manganese (IV) powder into the conical flask. 6. Close the conical with a stopper which attached to a delivery tube.

Immediately start the stopwatch. 7. Observe and record the burette reading at every 30 seconds interval time. 8. Repeat steps 1 to 7 without adding manganese(IV) oxide/ catalyst.

Able to write 7 steps improperly.


trough. 3. Clamp the burette by using a retort stand. Record the initial burette

reading. 4. Measure and pour of hydrogen peroxide in a conical flask. 5. Add 1 spatula of manganese(IV) powder into the conical flask. 6. Close the conical with a stopper which attached to a delivery tube. Start

the stopwatch. 7. Observe and record the burette reading

3

2


21

Able to write at least 6 steps improperly.


trough. 3. Measure and pour of hydrogen peroxide in a conical flask. 4. Add 1 spatula of manganese (IV) powder into the conical flask. 5. Close the conical with a stopper which attached to a delivery tube. 6. Observe and record the burette reading

No response / wrong response.

1

0

3(f) Method 1: Able to tabulate the data with the following aspects Sample answer:

Set Observation

Hydrogen peroxide + manganese(IV) oxide

Hydrogen peroxide only

Able to tabulate the data with the following aspects Sample answer:

Set

With catalyst

Without catalyst

Students give a wrong response.

2

1

0

3(f) Method 2: Able to tabulate the data with the following aspects Set 1: With catalyst/ manganese(IV) oxide

Time (s) 0 30 60 90 120

Volume of gas (cm3)

Set 2: Without catalyst/ manganese(IV) oxide

Time (s) 0 30 60 90 120

Volume of gas (cm3)

2

1


22

Able to tabulate the data with the following aspects

Set Volume

With catalyst/ manganese(IV) oxide

Without catalyst

Students give a wrong response.

0

END OF MARKING SCHEME


kimia sbp spm 2013

Education