sijil pelajaran malaysia 4541/1 · 2019-04-25 · 1 no. kad pengenalan - - angka giliran sijil...

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NO. KAD PENGENALAN - -

ANGKA GILIRAN

SIJIL PELAJARAN MALAYSIA4541/1

CHEMISTRYPaper 1

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Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini adalah dalam dwibahasa

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

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

Kertas soalan ini mengandungi 35 halaman bercetak

4541/1

SOALAN PRAKTIS BESTARIPROJEK JAWAB UNTUK JAYA (JUJ) 2015

https://cikguadura.wordpress.com/

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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 havemade. 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.

MAKLUMAT UNTUK CALON

1. Kertas soalan ini mengandungi 50 soalan.

2. Jawab semua soalan.

3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.

4. Hitamkan satu ruangan sahaja bagi setiap soalan.

5. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat.Kemudian hitamkan jawapan yang baru.

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

7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak bolehdiprogram.

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1 Diagram below shows a model of an atom.Rajah dibawah menunjukkan model suatu atom

Which scientist proposed this model of an atom?Saintis manakah yang mencadangkan model ini?

A Neils Bohr

B J.J Thompson

C James Chadwick

D Rutherford

2 The following information is about a particle.Maklumat berikut adalah tentang suatu zarah.

What is this particle ?Apakah zarah itu ?

A F-

B O2-

C N3-

D Ne

NucleusNukleus

ElectronsElektron

Electron arrangement is 2.8Susunan elektron ialah 2.8

Number of proton is 7Bilangan proton ialah 7

Number of neutron is 8Bilangan neutron ialah 8

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3 Diagram below shows the electron arrangement of an ion formed from atom Z.Rajah dibawah menunjukkan susunan elektron bagi ion yang terbentuk daripadaatom Z

Which of the following is true about atom Z ?Antara berikut, yang manakah benar tentang Z ?

A Atom Z has received electrons.

Atom Z telah menerima elektron.

B Number of electrons of atom Z is 8.

Bilangan elektron atom Z ialah 8.

C Electron arrangement of atom Z is 2.8.

Susunan elektron atom Z ialah 2.8.

D Z is an element in Period 3 of the Periodic Table.

Z dalam Kala 3 pada Jadual Berkala.

4. Which of the following pairs of molecular formulae and empirical formulae iscorrect ?Antara pasangan formula molekul dan formula empirik berikut yang manakah benar?

Molecular formulaFormula molekul

Empirical formulaFormula empirik

A C6H12 CH3

B C2H4 CH2

C H2SO4 HSO2

D H2O2 H2O

2+

Z

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5. What is the volume of 0.5 mol of oxygen at room conditions ?[ 1 mol of gas occupies the volume of 24 dm3 at room temperature and pressure ]Berapakah isipadu 0.5 mol oksigen pada keadaan bilik[1 mol gas menempati 24 dm3 pada suhu dan tekanan bilik ]

A 1.2 dm3

B 2.4 dm3

C 12.0 dm3

D 24.0 dm3

6. The following equation shows the combustion reaction of methane, CH4 in excessoxygen.Persamaan berikut menunjukkan tindak balas pembakaran metana dalam oksigenberlebihan

CH4(g) + 2O2(g) CO2(g) + 2 H2O(l)

Based on the equation above, calculate the mass of methane needed if 480 cm3 ofcarbon dioxide is released at room conditions.[ Relative atomic mass : H=1 ; C=12 ;1 mol of gas occupies the volume of 24 dm3 at room temperature and pressure ]

Berdasarkan persamaan di atas, hitungkan jisim metana yang diperlukan jika 480cm3 karbon dioksida dibebaskan pada keadaan bilik.[Jisim atom relatif : H=1 ; C=,12 ;1 mol gas menempati 24 dm3 pada suhu dan tekanan bilik ]

A 0.32 g

B 3.20 g

C 32.0 g

D 320.0 g

7 The equation below shows the reaction between magnesium and sulphuric acid.Persamaan di bawah menunjukkan tindakbalas antara magnesium dan asid sulfurik.

Mg(s) + H2SO4(aq) → MgSO4(aq) + H2(g)

Which of the following statements is true?Antara pernyataan berikut, yang manakah benar?[Relative atomic mass of H = 1; Mg = 24; S = 32; O = 16][Jisim atom relatif H =1; Mg = 24; Cl = 35.5; O = 16]

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A 1 g magnesium reacts completely with 1 g sulphuric acid.1 g magnesium bertindak balas lengkap dengan 1 g asid sulfurik.

B 1 mol magnesium reacts completely with 1 mol hydrogen ions.1 mol magnesium bertindak balas lengkap dengan 1 mol ion hydrogen.

C 24 g magnesium reacts completely with 98 g sulphuric acid.24 g magnesium bertindak balas lengkap dengan 98 g asid sulfuric

D 2 mol hydrogen gas are produced when one mol sulphuric acid reactscompletely with excess magnesium.2 mol gas hydrogen dihasilkan apabila 1 mol asid sulphurik bertindakbalas lengkap dengan berlebihan magnesium

8. Which of the following chemist arranged the elements in the Periodic Table ofElements in order of increasing proton numberAntara ahli kimia berikut, siapakah yang menyusun unsur-unsur di dalam JadualBerkala Unsur mengikut susunan bilangan proton yang menaik

A MoseleyB MendeleevC DobereinerD Lothar Meyer

9. Table below shows the proton number of elements P, Q and R. Which of thefollowings statements is true?Jadual dibawah menunjukkan nombor proton bagi unsur P,Q dan R.Manakah antara pernyataan berikut adalah benar ?

ElementUnsur

P Q R

Proton NumberNombor proton

11 13 17

A The electronegativity decreases in the order P, Q, RKeelektronegatifan berkurang mengikut susunan P,Q, R

B P, Q and R are good conductors of electricity.P,Q dan R adalah pengalir elektrik yang baik.

C All the elements exist as diatomic molecules.Semua unsur wujud dalam dwiatom.

D The atomic radius decreases in the order P, Q, R.Jejari atom berkurang mengikut susunan P,Q, R

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10 Table below shows the electron arrangements of five elements, P, Q, R and S .Jadual dibawah menunjukkan susunan electron bagi lima unsur P, Q, R, dan S.

Element[unsur]

Electron arrangement[susunan elektron]

P 2.3Q 2.4R 2.6S 2.8.1

Which two elements will react to form a covalent compound?Dua unsur manakah akan menghasilkan sebatian kovalen?

A R and SR dan S

B P and RP dan R

C P and QP dan Q

D R and QR dan Q

11 Element R and element Z react to form a covalent compound with a formula RZ2.What is the possible proton number of R and Z ?Unsur X dan Y bertindak balas membentuk sebatian kovalen dengan formula RZ2.

Apakah nombor proton yang mungkin bagi R dan Z ?

R Z

A 3 8

B 6 8

C 4 9

D 11 16

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12 Diagram below shows the symbols representing atoms A and E.Rajah dibawah menunjukkan simbol yang mewakili atom A dan E.

Calculate the relative molecular mass of the compound formed between atom A andatom E.Hitungkan jisim molekul relatif bagi sebatian yang terbentuk it antara atom A danatom E.

A 21B 43C 55D 102

13 Table below shows the electron arrangement of atom Q and atom M.Jadual dibawah menunjukkan susunan electron atom Q dan atom M.

ElementUnsur

Electron arrangementSusunan elektron

Q 2.4M 2.8.6

What is the formula of the compound and the bond formed between element Qand M?Apakah formula dan jenis ikatan bagi sebatian yang terbentuk antara Q dan M?

Formula of compoundFormula sebatian

BondIkatan

A QM2 Covalent

B Q2M Ionic

C QM2 Ionic

D Q2M Covalent

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A13

16

E8

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14 Which of the following pairs of metal in voltaic cell that gives the lowest voltmeterreading?Manakah antara pasangan logam dalam sel kimia berikut memberikan bacaanvoltmeter yang paling rendah?

A Mg and Cu/ Mg dan Cu

B Zn and Cu / Zn dan Cu

C Fe and Cu/ Fe dan Cu

D Pb and Cu/ Pb dan Cu

15 Diagram below shows how copper is purified by electrolysisRajah dibawah menunjukkan bagaimana kuprum ditulenkan secara elektrolisis.

Which is a suitable electrolyte X to be used?Elektrolit X manakah yang sesuai untuk digunakan?

A Hydrochloric acid solutionLarutan asid hidroklorik

B Copper(II) sulphate solutionLarutan kuprum(II) sulfat

C Aluminium nitrate solutionLarutan aluminium nitrate

D Magnesium sulphate solutionLarutan magnesium sulfat

Pure copper plateKepingan kuprum tulen

Impure copper plateKepingan kuprumtidak tulen

Electrolyte XElektrolit X

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From diagram above, the voltmeter’s needle is deflected.Which of the following statements are true about this experiment?Daripada rajah diatas, didapati jarum voltmeter terpesong.Antara pernyataan berikut yang manakah betul mengenai eksperimen ini?

I Zinc is the negative terminalZink adalah terminal negatif

II Copper is more electropositive than zincKuprum lebih elektropositif daripada zink

III Chemical energy is changed into electrical energyTenaga kimia ditukarkan kepada tenaga elektrik

IV Electrons flow from copper to zink through an outer circuitElektron mengalir dari kuprum ke zink melalui litar luar

A I and II only / I dan II sahaja

B I and III only / I dan III sahaja

C I, II and III only / I,II dan III sahaja

D II, III and IV only / II,III dan IV sahaja

Zn Cu

Solution of Zn 2+

Larutan Zn 2+Solution of Cu 2+

Larutan Cu 2+

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17 Diagram below shows the set-up of apparatus for electroplating.Rajah dibawah menunjukkan susunan radas proses penyaduran.

Which of the following equations represent the reactions at the anode and cathode?Antara berikut yang manakah persamaan yang mewakili tindak balas di anod dankatod?

Anode

[Anod]

Cathode

[Katod]

A Ag+ + e- → Ag Ag → Ag+ + e-

B Ag → Ag+ + e- Ag+ + e- → Ag

C Ag → Ag+ + e- Fe3+ + 3e- → Fe

D Fe3+ + 3e- → Fe Fe → Fe3+ + 3e-

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18 The artifacts called Baghdad batteries it consist of tall terracotta jars(130mm/ 5”)with a one and a half inch mouth containing a copper cylinder made of a rolled-upcopper sheet, which houses a single iron rod. At the top, the iron rod is isolated fromthe copper by asphalt plugs or stoppers, and both rod and cylinder fit snugly inside theopening of the jar which bulges outward towards the middle (reverse hourglassshape). The copper cylinder is not watertight, so when the jar was filled with a liquid,this would surround the iron rod as well. It was suggested that a priest or healer, usingan iron spatula to compound a vinegar based potion in a copper vessel, may have feltan electrical tingle,and used the phenomenon either for electro-acupuncture, or toamaze supplicants by electrifying a metal statue.

Artifak yang dipanggil bateri Baghdad ia terdiri daripada balang tanah liatterracotta(130mm/ 5”) dengan saiz mulut 1 ½” yang mengandungi silindertembaga diperbuat daripada lembaran tembaga bergulung dan yang menempatkanrod besi tunggal . Di bahagian atas , tongkat besi itu diasingkan dari tembagadengan palam asfalt atau penyumbat , dan kedua-dua rod silinder dan patut denganselesa di dalam pembukaan balang yang buncit di kawasan luar ke arah tengah (bentuk hourglass terbalik ) . Silinder tembaga tidak kedap air , jadi apabila balangitu dipenuhi dengan cecair , ini akan mengelilingi rod besi juga. Ia telah dicadangkanbahawa seorang Bomoh atau penyembuh , menggunakan spatula besi untukmencampur ubatan berasaskan cuka dalam sebuah silinder tembaga , mungkin telahmerasai satu terasa renjatan elektrik , dan digunakan fenomena sama ada untukelektro - akupunktur , atau untuk memukau supplicants oleh patung logam bercaselektrik .

Previously users of “Baghdad battery” is very problematic because the battery is lowsupply voltage . Suggest some ways to increase the capacity of the battery.

Dahulunya pengguna bateri Baghdad sangat bermasalah kerana bateri tersebutmembekalkan voltan yang rendah. Cadangkan beberapa cara untuk meningkatkankeupayaan bateri tersebut.

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I Replaced iron rod with plumbum rod.Rod besi diganti dengan rod plumbum.

II Replaced iron rod with argentum rodRod besi diganti dengan rod argentums

III Cooper cylinder is replaced with plumbum cylinderSilinder kuprum diganti dengan plumbum

IV Cooper cylinder is replaced with silver cylinderSilinder kuprum diganti dengan silinder plumbum

V Vinegar is replaced with hydrochloric acid.Cuka kurma diganti dengan asid hidroklorik cair

A IV and V only / IV dan V sahaja

B I,II and III only / I, II dan III sahaja

C I,III,IV and V only / I, III, IV dan V sahaja

D I,II,III,IV and V / I, II. III, IV dan V

19. Which of the following is true of weak acid?Antara berikut, yang manakah benar tentang asid lemah?

A Unable to neutralize alkaliTidak boleh meneutralkan alkali

B The pH value is more than 7.Nilai pH lebih besar daripada 7

C Able to changed litmus paper to blue.Boleh menukar warna kertas litmus biru ke merah.

D Ionizes partially in water to produce hydrogen ions.Mengion separa dalam air untuk menghasilkan ion hidrogen.

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20. Diagram below shows the steps taken to prepare a standard solution.Rajah dibawah menunjukkan langkah-langkah untuk menyediakan larutan piawai.

Arrange the steps in the correct order of preparing a standard solution.Susunkan langkah-langkah mengikut urutan yang betul bagi menyediakan larutanpiawai.A S, Q, R and P

S, Q, R dan P

B S, R, P,and QS, R, P dan Q

C Q, P, R and SQ, P, R dan S

D P, R, S and QP, R, S dan Q

21 The following equation represents a neutralization reaction.Persamaan berikut mewakili suatu tindak balas peneutralan

I Sulphuric acid + sodium hydroxideAsid sulfurik + natrium hidroksida

II Hydrochloric acid + solid copper(II) oxide.Asid hidroklorik + pepejal kuprum(II) karbonat

III Hydrochloric acid + MagnesiumAsid hidroklorik + Magnesium

IV Nitric acid + calcium carbonateAsid nitrik + kalsium karbonat

Step P Step Q Step R Step SLangkah P Langkah Q Langkah R Langkah S

Acid + Base → Salt + WaterAsid + Bes → Garam + Air

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A I and II only / I dan II sahaja

B I, III and IV only/ I,III dan IV sahaja

C II and III only/ II dan III sahaja

D I, II , III and IV/ I,II,III dan IV

22 25.0 cm3 of sodium hydroxide solution, NaOH is needed to neutralize 22.00 cm3 of0.10 mol dm-3 hydrochloric acid, HCl. What is the molarity of the sodium hydroxide,NaOH solution?

25.0 cm3 larutan natrium hidroksida, NaOH diperlukan untuk meneutralkan22.00 cm3 0.10 mol dm-3 Asid hidroklorik, HCl. Berapakah kemolaran larutanNatrium hidroksida, NaOH?

A 0.088 mol dm-3

B 0.078 mol dm-3

C 0.077 mol dm-3

D 0.080 mol dm-3

23 Which of the following salt is insoluble in water?Manakah di antara yang berikut merupakan garam tak terlarutkan di dalam air?

A Silver nitrateArgentum nitrat

B Calcium chlorideKalsium klorida

C Ammonium sulphateAmmonium sulfat

D Lead(II) carbonatePlumbum(II) karbonat

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24 You are required to verify the cation and anion in a sample of ammonium chloridesalt solution. What substance can you use to verify the cation and anion?Anda dikehendaki mengesahkan kation dan anion dalam satu sampel larutan garamammonium klorida. Apakah bahan yang anda boleh gunakan untuk mengesahkankation dan anion?

Cation

Kation

Anion

Anion

A Nessler reagentReagen Nessler

Dilute nitric acid and silver nitrateAsid nitrik cair dan argentums nitrat

B Nessler reagentReagen Nessler

Dilute hydrochloric acid and barium chlorideAsid hidroklorik cair dan barium klorida

C Potassium thiocyanateKalium tiosianat

Dilute nitric acid and silver nitrate Asid nitrikcair dan argentums nitrat

D Potassium thiocyanateKalium tiosianat

Dilute hydrochloric acid and barium chlorideAsid hidrokloreik cair dan barium klorida

25 A series of tests were carried out on a solution of salt X. Table below shows theresults of the tests.Satu siri ujian telah dijalankan ke atas larutan garam X. Jadual dibawahmenunjukkan keputusan ujian tersebut.

Based on the results of the experiment, salt X isBerdasarkan keputusan eksperimen, garam X ialah

Test.Ujian

ObservationPemerhatian

Add lead(II) nitrate solution.Tambahkan larutan plumbum(II)nitrat

White precipitate dissolves in waterwhen heated.Mendakan putih, larut dalam airapabila dipanaskan.

Add dilute sulphuric acid.Tambahkan asid sulfurik cair.

No change.Tiada perubahan.

Add sodium hydroxide solutionuntil in excess.Tambahkan larutan natriumhidroksida sehingga berlebihan.

White precipitate is formed.It is insoluble in excess sodiumhydroxide solution.Mendakan putih terbentuk.Ia tidak larut dalam larutan natriumhidroksida berlebihan.

Add ammonia solution until inexcess.Tambahkan larutan akueusammonia sehingga berlebihan.

White precipitate is formed.It is insoluble in excess ammoniasolution.Mendakan putih terbentuk.Ia tidak larut dalam larutan akueusammonia berlebihan.

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A Zinc chlorideZinc klorida

B Calcium carbonateKalsium karbonat

C Aluminium sulphateAluminium sulfat

D Magnesium chlorideMagnesium klorida

26 Magnesium reacts with chlorine gas to produce magnesium chloride. Which of thefollowing is true about magnesium chloride?

Magnesium bertindak balas dengan gas klorin untuk menghasilkan magnesiumklorida.Yang manakah adalah benar tentang magnesium klorida?

Molecular FormulaFormula molekul

BondIkatan

Type Of ParticlesJenis Zarah

A MgCl2 IonicIonik

Ionion

B MgCl2 CovalentKovalen

MoleculeMolekul

C MgCl Ionicionik

IonIon

D MgCl CovalentKovalen

MoleculeMolekul

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Diagram 8 / Rajah 8

Dead Sea, also known as Salt Sea, . This inland lake is the world's saltiest; its watercontains about 25 percent solid concentrates, as compared to ocean concentrates ofsome 4 to 6 percent. The lake has no outlet and is fed from the north by waters of theJordan River and wadis (streams that are usually dry but fill during the rainy season).Dead Sea's brine produce potash for both Jordan and Israel, an important componentof agricultural fertilizer.

Laut mati juga dikenali sebagai laut garam. Tasik daratan ini merupakan yang palingmasin di dunia; airnya mengandungi 25 peratus pepejal terlarut berbanding denganlautan biasa berkepekatan 4-6 peratus. Tasik ini tiada jalan keluar aliranya.Iamendapat bekalan air daripada sungai dan wadi Jordan sebelah utara.

During raining season all the white particle disappear. In your opinion which possibleproperties of white particle could be.Semasa musim hujan semua zarah putih tersebut lenyap. Pada pandangan anda manasifat yang mungkin bagi zarah putih tersebut.

I Can conduct electricity in molten state.Boleh mengalirkan elektrik dalam keadaan lebur

II Consists of chloride and sulphate compoundsTerdiri dari sebatian klorida atau sulfat

III High melting and boiling pointTakat lebur dan takat didih yang tinggi

IV present as white precipitatehadir dalam keadaan serbuk putih

V Can be purified using recrystallization processBoleh ditulenkan melalui proses penghabluran semula

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A I and II only / I dan IIsahaja

B I,II and III only / I, II dan III sahaja

C I,III,IV and V only / I, III, IV dan V sahaja

D I,II,III,IV and V / I, II. III, IV dan V

28 Which of the following pairs of elements is correct for the type of alloy?Antara pasangan unsur berikut yang manakah betul untuk jenis aloi?

Main ElementUnsur utama

Element addedUnsur yang ditambah

Type of alloyJenis aloi

A CopperKuprum

ZincZink

BrassLoyang

B CopperKuprum

IronFerum

BronzeGangsa

C TinStanum

CarbonKarbon

PewterPewter

D IronFerum

TinStanum

SteelKeluli

29 Which process has the highest rate of reaction?.Proses manakah yang mempunyai kadar tindakbalas yang paling tinggi?.

A RustingPengaratan

B RespirationRespirasi

C CombustionPembakaran

D PhotosynthesisFotosintesis

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30 The equation show the reaction between calcium carbonate CaCO3 and hydrochloricacid HCl.Persamaan berikut menunjukkan tindak balas antara kalsium karbonat, CaCO3 danasid hidroklorik, HCl :

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

Which of the following is the suitable method to determine the rate of reaction?Antara berikut yang manakah kaedah yang sesuai untuk menentukan kadar tindakbalas itu?

A Change in the temperature of the solution with timePerubahan dalam suhu bagi larutan dengan masa

B Change in the volume of carbon dioxide gas with timePerubahan isi padu gas karbon dioksida dengan masa

C Change in the mass of water with timePerubahan jisim air dengan masa

D Change in the concentration of hydrochloric acid with timePerubahan kepekatan asid hidroklorik dengan masa

31 Diagram below shows an energy profile diagram. Ea is the activation energy for thedecomposition of hydrogen peroxide.Rajah dibawah menunjukkan suatu gambar rajah profil tenaga. Ea bagi penguraianhidrogen peroksida.

Ea

EnergyTenaga

Reaction pathLintasan tindakbalas

P

Q

R

S

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Volume of CO2 gascollected/ cm3

Isipadu gas CO2 yangdikumpul/ cm3

Time / sMasa /s

Which of the following is the activation energy for the dissociation of hydrogenperoxide when manganese(IV) oxide is added?Antara berikut yang manakah tenaga pengaktifan bagi penguraian hydrogenperoksida apabila mangan(IV) oksida ditambahkan?

A P

B Q

C R

D S

32 Diagram below shows the graph of volume of carbon dioxide CO2 release againsttime.Rajah dibawah menunjukan graf isipadu gas karbon dioksida CO2 yang terbebasmelawan masa.

Curve I produce when 20 cm3 hydrochloric acid, HCl 0.2 mol dm3 react with excesssodium carbonate, Na2CO3 chips. Which substances will react to produce curve II?Lengkung I diperoleh apabila 20 cm3 asid hidroklorik , HCl 0.2 mol dm3

bertindakbalas dengan kalsium karbonat berlebihan. Bahan tindakbalas manakahyang menghasilkan lengkung II ?

A 10 cm3 nitric acid, HNO3 0.2 mol/dm3 + Na2CO3 chips10 cm3 asid nitrik, HNO3 0.2 mol/dm3 + ketulan Na2CO3

B 20 cm3 ethanoic acid, CH3 COOH , 0.2 mol/dm3 + Na2CO3 chips20 cm3 asid etanoik, CH3 COOH , 0.2 mol/dm3+ ketulan Na2CO3

C 30 cm3 sulphuric acid, H2SO4 , 0.5 mol/dm3 + Na2CO3 powder30 cm3 sulphuric acid, H2SO4 , 0.5 mol/dm3 + serbuk Na2CO3

D 20 cm3 hydrochloric acid, HCl , 0.2 mol/dm3 + Na2CO3 powder20 cm3 asid hidroklorik, HCl , 0.2 mol/dm3 + serbuk Na2CO3

Curve ILengkung I

Curve IILengkung II

Time/Masa

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Volume ofgas collected/cm3

Isipadu gasyangdikumpul/cm3

Time/ secondsMasa/ saat

33 Graph below shows the results of these experiments.Graf dibawah menunjukkan keputusan eksperimen-eksperimen ini.

Graph 8Graf 8

Calculate the average rate of reaction for Experiment I.Hitungkan kadar tindak balas purata bagi eksperimen I.

A 0.83 cm3 s-1

B 0.91 cm3 s-1

C 1.00 cm3 s-1

D 1.20 cm3 s-1

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Scientific research shows that natural rubber chip that have been process in certainways are able to absorb some liquid like petroleum when they are contacted. TheEnvironmental Department use this method in order to handle the 2 oil splittinghappened in the ocean recently. Two ship is sent to handle this situation. Both of theoil splitting have the same size of area. The two ship brought the different size ofrubber chips but similar in the amount of mass.The result, ship B able to absorb the oil splitting faster than ship A.Kajian saintifik telah menunjukkan bahawa ketulan getah yang telah diproses dengancara tertentu berupaya untuk menyerap cecair seperti minyak petroleum jikabersentuhan. Sehubungan itu Jabatan Alam Sekitar mencuba alternatif ini untukmenangani 2 kejadian tumpahan minyak yang berlaku baru-baru ini.Dua buah kapal telah ditugaskan untuk menyelesaikan masalah 2 tumpahan minyakdi lautan tersebut menggunakan kaedah ini dengan membawa ketulan getah yangberbeza saiz tetapi pada jumlah jisim yang sama. Kedua-dua tumpahan minyak itumempunyai saiz dan kuantiti yang sama. Hasilnya kapal B dapat menyelesaikanmasalah ini lebih cepat berbanding kapal A.

Which of the is the best way to describe the situationAntara yang berikut, apakah penjelasan yang dapat diberi untuk menjelaskankeadaan ini.

I. The rubber chips in ship B is more easier to contact with the petroleum particlesKetulan getah kapal B lebih mudah bersentuhan dengan zarah minyak petroleum.

II. The total surface area for rubber particles in ship B is biggerJumlah luas permukaan terdedah zarah getah kapal B lebih besar.

III. The total surface area for rubber particles in ship A is biggerJumlah luas permukaan terdedah zarah getah kapal A lebih besar.

IV. The rubber chips in ship B is more easier to contact with the petroleum particlesKetulan getah kapal A lebih mudah bersentuhan dengan zarah minyak petroleum.

Ship A rubber chipKetulan getah kapal A

Ship B rubber chipKetulan getah kapalB

PetroleumparticlesZarahminyakpetroleum

Ship B rubber chipKetulan getah kapal B

24

A I and III only / I dan III sahaja

B II and IV only / II dan IV sahaja

C III and IV / III dan IV sahaja

D I and II / I dan II sahaja

35 The following equation represents the reaction between propene and chlorine.Persamaan berikut mewakili tindak balas antara propena dan klorin.

Propene + Cl2 → ZPropena + Cl2 → Z

Which of the following is the structural formula for Z?Antara berikut yang manakah adalah formula struktur bagi Z?

A

B

C

D

25

36 Diagram below shows the structural formula of pent-1-ene.Rajah dibawah menunjukkan formula struktur bagi pent-1-ena.

Which of the following are the structural formulae and names for the isomers ofpent-1-ene?Antara berikut yang manakah adalah formula struktur dan nama isomer bagi pent-1-ena?

A I and IV only / I dan IV sahaja

B II and III only / II dan III sahaja

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

D I, II, III and IV / I,II,III dan IV

26

37 Excess calcium carbonate powder reacts with 50 cm3 of 0.1 mol dm-3 hydrochloricacid to produce carbon dioxide gas.Which of the following acids will produce a highest rate of reaction?

Kalsium karbonat berlebihan bertindak balas dengan 50 cm3 asid hidroklorik0.1 mol dm-3 asid hidroklorik bagi menghasilkan gas karbon dioksida.Antara asid berikut yang manakah akan menghasilkan kadar tindak balas yangpaling tinggi?

A 50 cm3 of 0.2 mol dm-3 sulphuric acid50 cm3 sulfurik asid 0.2 mol dm-3

B 50 cm3 of 0.2 mol dm-3 ethanoic acid50 cm3 asid etanoik asid 0.2 mol dm-3

C 50 cm3 of 0.2 mol dm-3 carbonic acid50 cm3 asid karbonik 0.2 mol dm-3

D 50 cm3 of 0.2 mol dm-3 nitric acid50 cm3 asid nitrik 0.2 mol dm-3

38 A hydrocarbon compound is burnt completely in air to form 26.4 g of carbon dioxidegas and 10.8 g of water. What is the molecular formula of the hydrocarboncompound?[relative atomic mass , C = 12, H = 1, O = 16 ]Satu sebatian karbon dibakar dengan lengkap dalam udara menghasilkan 26.4 g gaskarbon dioksida dan 10.8 g air. Apakah formula molekul sebatian hidrokarbon itu?[jisim atom relatif , C = 12, H = 1, O = 16 ]

A C3H6

B C3H8

C C2H4

D C2H6

39 The following chemical equation shows the complete combustion of ethane gas.Persamaan kimia berikut menunjukkan pembakaran lengkap bagi gas etena.

2C2H6 + 7O2 4CO2 + 6H2O

What is the volume of ethane needed to produce 2.2 gram of carbon dioxide atstandard temperature and pressure?[ molar mass of CO2 = 44 gmol-1][ molar volume of gas at standard temperature and pressure = 22.4 dm3 ]Berapakah isipadu etana yang diperlukan untuk menghasilkan 2.2 gram karbondioksida pada suhu dan tekanan piawai?[ jisim molar CO2 = 44 gmol-1][ isipadu molar gas pada suhu dan tekanan piawai = 22.4 dm3]

27

A 0.05 dm3

B 0.10 dm3

C 0.56 dm3

D 1.12 dm3

40 Which substance can be used to convert Fe 3+ ions to Fe 2+ ions ?Bahan manakah yang boleh digunakan untuk menukar ion Fe 3+ kepada ion Fe 2+ ?

A Acidified potassium manganite (VII) solutionLarutan kalium manganat (VII) berasid

B CopperKuprum

C SilverArgentum

D Sulphur dioxide gas.Gas sulfur dioksida.

41 The following equation shows the redox reaction between copper and silver nitratesolution.Persamaan berikut menunjukkan tindak balas redok antara kuprum dengan larutanargentum nitrat.

Cu + 2AgNO3 → Cu(NO3)2 + 2Ag

Which of the following statements is true about this reaction?Antara pernyataan berikut yang manakah benar mengenai tindak balas ini?

A Silver ion is oxidisedIon argentum dioksidakan

B Copper is the oxidising agentKuprum adalah agen pengoksidaan

C The oxidation number of copper increasesNombor pengoksidaan bagi kuprum bertambah

D The oxidation number of nitrogen decreasesNombor pengoksidaan bagi nitrogen berkurang

28

42 Table below shows the total volume of gas collected at certain time intervals in areaction.Jadual dibawah menunjukkan jumlah isipadu gas yang terkumpul pada sela tertentudalam suatu tindakbalas.

Time/sMasa/s

0 30 60 90 120 150 180 210

Volume of gas/ cm3

Isipadu gas /cm3

0 2.00 3.70 5.20 6.40 7.30 8.60 8.60

What is the average rate of reaction at the second minute?Berapakah kadar tindakbalas purata dalam minit ke dua?

A 0.040 cm3s-1

B 0.045 cm3s-1

C 0.053 cm3s-1

D 0.062 cm3s-1

43 The following thermochemical equation shows a combustion reaction between hexaneC6H14 and oxygen.Persamaan termokimia berikut menunjukkan tindakbalas pembakaran antaraheksana C6H14 dan oksigen.

2C6H14 + 19O2 12CO2 + 14H2O ΔH = -3500 kJ mol-1

What is the mass of hexane need to be burnt to produce heat that can heat up 2 kg ofwater from 25ºC to 100º C ?[ relative atomic mass : C=12, H=1 ; specific heat capacity of water = 4.2 Jg-1ºC-1]Berapakah jisim heksana yang perlu dibakar untuk menghasilkan haba yang dapatmemanaskan 2 kg air daripada 25ºC ke 100º C ?[ jisim atom relatif : C=12, H=1 ; muatan haba tentu air = 4.2 Jg-1ºC-1]

A 5.16 g

B 5.56 g

C 15.48 g

D 16.67 g

29

44.

EXTRACTION OF IRON OREPENGEKSTRAKAN BIJIH BESI

Samad is a manager of an extraction factory located at Bukit Besi Terengganu. As amanager, Samad is responsible to brief the potential investor that coming to thefactory. Here some of the information planned by Samad.“Iron is a metal that widely use in the world. Iron is extracted from its ore, hematiteFe2O3 or magnetite Fe3O4 inside the blast furnace. Carbon in form of coke andlimestone, CaCO3 are needed in the Iron extraction process.”You, as the assistant manager have to assist your manager in that briefing. In youropinion, which information will help to attract the investor to invest?Samad merupakan seorang pengurus di sebuah kilang pengekstrakan besi yangberoperasi di Bukit Besi Terengganu. Sebagai seorang pengurus, Samadbertanggungjawab untuk memberi penerangan kepada pelabur yang akan datangmelawat kilang tesebut. Berikut adalah antara isi penerangan yang dirancang olehSamad.

Fe2O3 +3CO

2Fe +3CO2

30

“Besi merupakan logam yang paling banyak digunakan di dunia. Besi diekstraksecara besar-besaran daripada bijih besi seperti hematit Fe2O3 atau magnetit Fe3O4

di dalam relau bagas. Karbon dalam bentuk arang kok dan batu kapur, CaCO3,diperlukan dalam pengekstrakan besi.”Anda sebagai penolong pengurus kilang tersebut di minta untuk membantu dalammemberi penerangan. Pada pendapat anda,penerangan yang bagaimana akan menarik pelabur untuk melabur di kilang itu.

I. Oxidation of the coke will produce heat which become the main source of heatfor the furnace, so the production cost will be cheaper.Pengoksidaan arang kok menghasilkan haba yang merupakan sumber habautama relau, menjadikan kos pengeluaran lebih rendah.

II. Impurities from the iron ore combine with the limestone produce slag whichused in road making and cement.Bendasing dari bijih besi bergabung dengan kalsium oksida yang terhasilmembentuk sanga yang berguna dalam pembuatan jalan raya dan simen.

III. Carbon monoxide gas produced, functioned as main oxidizing agent.Gas karbon monoksida yang terhasil dapat berfungsi sebahagi agenpengoksidaan utama.

IV. The molten iron will float on the molten slag for easier removal.Leburan ferum akan timbul di atas leburan sanga, memudahkanpengasingan..

A. I and II only / I dan II sahaja

B. I dan IV only / I dan IV sahaja

C. II dan III only / II dan III sahaja

D. III dan IV only / III dan IV sahaja

31

45 Table below shows the reactants and heat of neutralization of the reaction betweensodium hydroxide solution with methanoic acid and hydrochloric acid.Jadual dibawah menunjukkan bahan tindak balas dan haba peneutralan bagi tindakbalas antara larutan natrium hidroksida dengan asid metanoik dan asid hidroklorik.

ReactantsBahan tindak balas

Heat of neutralization/ kJ mol-1

Haba peneutralan/ kJ mol-1

Methanoic acid and sodium hydroxide solutionAsid metanoik dan larutan natrium hidroksida - 54.0

Hydrochloric acid and sodium hydroxidesolutionAsid hidroklorik dan larutan natriumhidroksida

-57.0

Which of the following statements is true?Antara pernyataan berikut yang manakah benar?

A Methanoic acid fully dissociates in waterAsid metanoik tercerai sepenuhnya di dalam air

B Methanoic acid releases energy to the surroundingAsid metanoik membebaskan tenaga ke persekitaran

C Methanoic acid produces H+ ions which can be replaced by Na+ ionsAsid metanoik menghasilkan ion H+ yang boleh menggantikan ion Na+

D Methanoic acid absorbed some of the heat energy released to complete itsdissociation in waterAsid metanoik menyerap sebahagian daripada tenaga yang dibebaskan untukmelengkapkan penceraiannya dalam air

32

ThermometerTermometer

Polystyrene cupCawan polistrin

46 In an experiment 50 cm3 1.0 mol dm-3of dilute nitric acid solution is mixed with50 cm3 of 1.0 mol dm-3 sodium hydroxide solution in a polystyrene cup. Thetemperature of the mixture increased by 140C. What is the heat released in theexperiment?[Specific heat capacity of the solution is 4.2 Jg-1oC-1]

Dalam satu eksperimen 50 cm3larutan asid nitrik 1.0 mol dm-3 dicampur dengan50 cm3 larutan natrium hidroksida 1.0 mol dm-3 di dalam cawan polistirena. Suhucampuran itu bertambah sebanyak 14oC. Berapakah haba yang dibebaskan dalameksperimen itu?[Muatan haba tentu larutan ialah 4.2 Jg-1oC-1]

A 1470 J

B 2940 J

C 4410 J

D 5880 J

47 The reaction between 50.0 cm3 Copper sulphate, CuSO4 1.0 mol dm-1 with excess zincpowder release a amount of heat is shown in the diagram below.Tindakbalas diantara 50.0 cm3 kuprum sulfat , CuSO4 1.0 mol dm-1 dengan serbukzink berlebihan membebaskan sejumlah haba ditunjukkan dalam gambarajahdibawah.

What is the highest temperature change of the mixture if the heat of displacement ofthe reactions is 42.0 kJ/mol ?Apakah perubahan suhu tertinggi campuran jika haba penyesaran bagi tindakbalasini ialah 42.0 kJ/mol ?

A 1 ºC

B 2 ºC

C 10 ºC

D 20 ºC

Zinc powderSerbuk zink

Copper sulphate solutionLarutan Kuprum sulfat

33

48

Fermentation process/ Proses fermentasi

Fermentation equation C6H12O6 (aq) 2C2H5OH(l) + 2CO2(g)

Persamaan penapaian C6H12O6(ak) 2C2H5OH(ce) + 2CO2(g)

Glucose is a form of carbohydrate which is very important to human. Human do therespiration to transform glucose to energy and side wastes which is water vapour andgas X. Interesting that the product of the glucose fermentation also can be use as fuelfor the vehicles. Similar with the respiration, the combustion of that fuel produceenergy, water vapour and gas X.Which of the following identification test can be used to help identified the identity ofgas X.Glukosa adalah satu bentuk karbohidrat yang merupakan bahan makanan yangpenting bagi manusia, dimana proses respirasi manusia menukarkan glukosa kepadatenaga dan juga hasil sampingan iaitu wap air dan gas X. Menariknya, glukosa jugaselepas proses penapaian boleh menjadi bahan bakar bagi kenderaan berenjin. Samaseperti respirasi, proses pembakaran bahan bakar ini juga menghasilkan tenaga bagienjin dan juga hasil sampingan wap air dan gas X.

34

Antara yang berikut, ujian-ujian pengesahan manakah yang dapat digunakan untukmembantu mengesahkan identiti gas X.

I. Lighted up the glowing wooden splinter.Menyalakan kayu uji berbara

II. Change moist blue litmus paper to redMenukarkan kertas litmus biru lembab kepada merah

III. Turn lime water cloudy when react with it.Mengeruhkan air kapur apabila bertindakbalas dengannya

IV. Change moist red litmus paper to blueMenukarkan kertas litmus merah lembab kepada biru.

A I and III only / I dan III sahaja

B II and III only / II dan III sahaja

C II and IV only / II dan IV sahaja

D I and IV only / I dan IV sahaja

49 A patient is experiencing depression and has difficulty in sleeping. Which of thefollowing medicine is suitable for treating this patient?Seorang pesakit menghadapi kemurungan dan kesusahan untuk tidur. Antara ubatberikut, yang manakah sesuai bagi merawat pesakit tersebut?

A CodeineKodeina

B BarbiturateBarbiturat

C ParacetamolParasetamol

D StreptomysinStreptomisin

35

50. Diagram 8 shows the structure of a detergent ion.Rajah 8 menunjukkan struktur bagi satu ion detergen.

Diagram 8Rajah 8

Which of the following statements explains the diagram?Antara pernyataan berikut yang manakah menerangkan rajah tersebut?

A Parts X and Y are soluble in waterBahagian X dan bahagian Y larut dalam air

B Parts X and Y are soluble in greaseBahagian X dan bahagian Y larut dalam gris

C Part X is soluble in grease and part Y is soluble in waterBahagian X larut dalam gris tetapi bahagian Y larut dalam air

D Part X is soluble in water and part Y is soluble in greaseBahagian X larut dalam air tetapi bahagian Y larut dalam gris

END OF QUESTIONS PAPERKERTAS SOALAN TAMMAT

Part X Part YBahagian X Bahagian Y


SULIT

4541/2© Hak Cipta JUJ Pahang 2015 [Lihat halaman sebelahSULIT

NO. KAD PENGENALAN - -

ANGKA GILIRAN

SIJIL PELAJARAN MALAYSIA4541/2CHEMISTRYKertas 2

2½ jam Dua jam tiga puluh minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

Kertas soalan ini mengandungi 33 halaman bercetak

Kegunaan PemeriksaKod Pemeriksa

Bahagian SoalanMarkahPenuh

MarkahDiperoleh

A

1 9

2 9

3 10

4 10

5 11

6 11

B7 20

8 20

C9 20

10 20

Jumlah 100


1. Tulis nombor kad pengenalan dan angkagiliran anda pada petak yang disediakan.

2. Kertas soalan ini adalah dalam dwibahasa.

3. SoalandalambahasaInggerismendahuluisoalan yang sepadan dalam Bahasa Melayu.

4. Calon dibenarkan menjawab keseluruhanatau sebahagian soalan samaada dalamBahasa Inggeris atau Bahasa Melayu.

5. Calon dikehendaki membaca maklumat dihalaman belakang kertas soalan ini.


4541/2 2 PRAKTIS BESTARI 2015

4541/2 © Hak Cipta JUJ Pahang 2015 [Lihat halaman sebelahSULIT

Section ABahagian A

[60 marks][60 markah]

Answer all questions in this section.Jawab semua soalan dalam bahagian ini.

1 (a) Table 1 shows the proton number and nucleon number of atoms S, T and U. Theletters used are not the actual symbols of the atoms.Jadual 1 menunjukkan nombor proton dan nombor nukleon bagi atom-atom S, Tdan U. Huruf yang digunakan bukan simbol sebenar bagi atom-atom itu.

AtomProton numberNombor proton

Nucleon numberNombor nukleon

S 11 23

T 11 24

U 12 24

Table 1 / Jadual 1

(i) What is meant by nucleon number?Apakah yang dimaksudkan dengan nombor nukleon?

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

[1 markah]

(ii) Atom S consist of subatomic particles. State the name of subatomic particle thathas the lightest mass.Atom S terdiri daripada zarah-zarah subatom. Nyatakan nama bagi zarahsubatom yang mempunyai jisim paling ringan.

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

[1 markah]

(iii) Which two atoms are isotope? Give a reason to your answer.Manakah antara dua atom adalah isotope? Berikan sebab bagi jawapan anda.

…..………………………………………………………………………………..

……………………………………………………………………………………

……………………………………………………………………………………[2 marks]

[2 markah]



(iv) Draw the electron arrangement of atom T.Lukis susunan elektron bagi atom T.

[1 mark][1 markah]

(v) Write the standard representation of atom of element U in the form of XAZ .

Tulis perwakilan atom unsur U dalam bentuk XAZ

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

[1 markah]

(b) Diagram 1 shows an experiment to compare the rate of diffusion between ammoniagas, NH3 and hydrogen chloride gas, HCl.Rajah 1 menunjukkan satu eksperimen untuk membandingkan kadar resapan antaragas ammonia, NH3 dan gas hidrogen klorida, HCl.

Diagram 1 / Rajah 1

(i) State the name of the white fume formed.Nyatakan nama bagi wasap putih yang terbentuk.

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

[1 markah](ii) Which gas diffused faster? Give a reason to your answer.

Gas manakah meresap lebih cepat? Berikan satu sebab kepada jawapan anda.

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

…………………………………………………………………………………….[2 marks]

[2 markah]



2 (a) Tartaric acid is used as flavouring in food and beverage. Diagram 2.1 shows themolecular formula of tartaric acid.Asid tartarik digunakan sebagai perisa dalam makanan dan minuman. Rajah 2.1menunjukkan formula molekul bagi asid tartarik.

Diagram 2.1 / Rajah 2.1

(i) What is the meaning of molecular formula?Apakah yang dimaksudkan dengan formula molekul?

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

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

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

[1 markah](ii) Write the empirical formula of tartaric acid.

Tulis formula empirik bagi asid tartarik.

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

[1 markah]

(iii) State the different between molecular formula and empirical formula of tartaricacid.Nyatakan perbezaan antara formula molekul dan formula empirik bagi asidtartarik.

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

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

[1 markah]

C4H6O6



(b) Diagram 2.2 shows a balance chemical equation.Rajah 2.2 menunjukkan satu persamaan kimia yang seimbang.

2KI(aq) + Pb(NO3)2(aq) → 2KNO3(aq) + PbI2(s)

2KI(ak) + Pb(NO3)2(ak) → 2KNO3(ak) + PbI2(p)


Based on the equation, answer the following questions;Berdasarkan persamaan itu, jawab soalan-soalan berikut;

(i) State the name of reactants and a products.Nyatakan nama bagi bahan tindak balas dan hasil tindak balas.

Reactants: ………………………………………………….……………………..Bahan tindak balas

Products: .……..…………………………………………………………………..Hasil tindak balas

[2 marks][2 markah]

(ii) What is the physical state of PbI2?Apakah keadaan fizik bagi PbI2?

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

[1 markah]

(iii) In a reaction 50 cm3 of 0.5 mol dm-3 Pb(NO3)2 has reacted with KI, calculate themass of PbI2 formed.[Relative atomic mass : Pb = 207 ; I = 127]Dalam suatu tindak balas 50 cm3 Pb(NO3)2 0.5 mol dm-3 telah bertindak balasdengan KI, hitung jisim PbI2 yang terbentuk.[Jisim atom relatif : Pb = 207 ; I = 127]

[3 marks][3 markah]



3. Diagram 3.1 shows the electron arrangement for elements W, X, Y and Z. The letters usedare not the actual symbol of the elements.Rajah 3.1 menunjukkan susunan electron bagi unsur-unsur W, X, Y dan Z. Huruf yangdigunakan bukan simbol sebenar unsur itu.


(a) Using the letters in the Table of the Elements in Diagram 3.1, answer the followingquestion.Dengan menggunakan huruf-huruf unsur dalam Rajah 3.1, jawab soalan berikut.

(i) State the position of element X in the Periodic Table. Explain your answer.Nyatakan kedudukan unsur X dalam Jadual Berkala. Jelaskan jawapan anda

……………………………………………………………………………………….[ 2 marks ]

[2 markah ]

(ii) What is meant by amphoteric oxide? Which element in Diagram 3.1 showsamphoteric property?Apakah yang di maksudkan dengan oksida amfoterik? Unsur yang manakahdalam Rajah 3.1 menunjukkan sifat amfoterik?

..…………………………………………………………………………………[ 2 marks ]

[2 markah ]

3p4n

17p18n

13p14n

12p12n

Element WUnsur W

Element XUnsur X

Element YUnsur Y

Element ZUnsur Z



(iii) Element W reacts with water to form a solution. State the change in colour whena litmus paper was dipped into the solution.Unsur W bertindak dengan air membentuk suatu larutan. Nyatakan perubahanwarna apabila kertas litmus di celupkan ke dalam larutan.

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

[1 markah ]

(b) Diagram 3.2 shows the stages in manufactured sulphuric acid in industry.Rajah 3.2 menunjukkan peringkat-peringkat dalam pembuatan asid sulfurikdalam industri.


(i) State the process of manufacturing sulphuric acid in industry.Nyatakan proses pembuatan asid sulfurik dalam industri.

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

[1 markah ]

(ii) Name the catalyst used to convert sulphur dioxide to sulphur trioxide.Namakan mangkin yang digunakan untuk menukarkan sulfur dioksida kepadasulfur trioksida.

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

[1 markah ]

Catalyst



(iii) Write the chemical equation when sulphur trioxide reacts with sulphuric acidto produce oleum.

Tuliskan persamaan kimia apabila sulfur trioksida bertindakbalas dengan asidsulfurik asid untuk menghasilkan oleum

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

[1 markah ](iv) Give two uses of sulphuric acid in daily life.

Nyatakan dua kegunaan asid sulfurik dalam kehidupan seharian

..…………………………………………………………………………………….

………………………………………………………………………………………

………………………………………………………………………………………[2 marks ]

[2 markah ]



4 (a) Diagram 4.1 shows the setup of apparatus of cell P that combined with cell Q.Rajah 4.1 menunjukkan susunan radas bagi sel P yang bergabung dengan sel Q.

Cell P / Sel P Cell Q / Sel Q


(a) State the types of Cell P and Cell Q.Nyatakan jenis Sel P dan Sel Q.

(i) Cell P / Sel P : ………………………………………………………………...

(ii) Cell Q / Sel Q : ………………………………………………………………..[2 marks]

[2 markah]

(b) In cell Q,Dalam Sel Q,

(i) Write the half equation at the cathode.Tuliskan setengah persamaan di katod.

…………………………………………………………………………………..[2 marks]

[2 markah]

(ii) State the colour change in the electrolyte. Explain your answer.Nyatakan perubahan warna pada elektrolit. Terangkan jawapan anda.

…………………………………………………………………………………..

…………………………………………………………………………………..[2 mark]

[2 markah]

CopperKuprum

Copper(II) sulphateSolutionKuprum(II) sulfat

CarbonKarbon

Sodium nitrateSolution

Larutan sodiumnitrat

A B C DZincZink



(c) In cell P,Dalam sel P,

(i) Write the formulae of all the ions present in sodium nitrate solutionTuliskan formula bagi semua ion yang hadir dalam larutan natrium nitrat.

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

[1 markah]

(ii) When the switch is on, bubble gas release at electrode A. Name the gas.Apabila suis dibuka, gelembung gas terbebas pada elektrod A. Namakan gastersebut.

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

[1 markah]



Diagram 4.2 /Rajah 4.2

(d) Diagram 4.2 shows the Light Emitting Diode (LED) bulb that can lights up whenelectric current flow through it.Rajah 4.2 menunjukkan mentol Diod Pemancar Cahaya (LED) yang boleh menyalaapabila arus elektrik mengalir melaluinya.

You are given a LED bulb, iron nail, zinc stripe, connecting wire and a beaker byyour chemistry teacher. Based on the apparatus given, you are required to lights upthe bulb by using the substance that usually used by your mother at the kitchen.Guru kimia anda memberikan anda sebuah mentol LED, paku besi, jalur zink, wayarpenyambung dan sebuah bikar. Berdasarkan bahan-bahan yang dibekalkan kepadaanda, anda diminta menyalakan mentol LED tersebut dengan menggunakan bahanyang biasa digunakan oleh ibu anda di dapur.

State the substance and explain why the substance can lights up the LED bulb.Nyatakan bahan tersebut dan terangkan bagaimana bahan tersebut bolehmenyalakan mentol LED tersebut.

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

………………………………………………………………………………………………….[2 marks]

[2 markah]

Flat spotSpot rata

Epoxy lensKanta epoksi



Magnesia Milk Apple Juice Liquid Detergent Bleach solutionSusu Magnesia Jus Epal Cecair Detergen Larutan Peluntur


5 Diagram 5.1 shows a bottle of magnesia milk, a glass of apple juice, liquid detergentand bleach solution . Aini investigate the pH value of the substance given by usingpH paper . She measured 2 cm3 of each solution and put into four different test tubes.The results were tabulated in table 5.Rajah 5.1 menunjukkan sebotol susu magnesia, segelas jus epal, cecair detergen, danlarutan peluntur. Aini mengkaji nilai pH bagi semua bahan yang diberi denganmenggunakan kertas pH. Beliau menyukat 2cm3 daripada setiap larutan danmemasukkannya ke dalam empat tabung uji berasingan. Keputusan dicatatkan dalamJadual 5.

SolutionLarutan

Bleach SolutionLarutan Peluntur

Apple JuiceJus Epal

Magnesia MilkSusu Magnesia

Liquid detergentCecair detergen

pH 1 5 9 13

Table 5 / Jadual 5

(a) (i) From table 5, categorized all the solution given into acid and alkali.Daripada Jadual 5, kategorikan semua larutan yang diberikan kepada asiddan alkali.

AcidAsid

AlkaliAlkali

[2 marks][2 markah]

SBUIH



(ii) Based on your answer in (a) (i), which alkali is strong alkali? Explain whyin terms of concentration of ions in the solution.Berdasarkan jawapan anda dalam (a)(i), alkali manakah merupakah alkalikuat?Terangkan jawapan anda berdasarkan kepekatan ion di dalamlarutan tersebut.

……………………………………………………………………………..

……………………………………………………………………………..[2 marks]

[2 markah]

(iii) The apple juice contains malic acid, C4H6O5, which is weak acid. What ismeant by weak acid?Jus epal mengandungi asid malik, C4H6O5, iaitu asid lemah. Apakah yangdimaksudkan asid lemah?

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

[1 markah]


(b) Diagram 5.2 shows standard solution of sodium hydroxide in two volumetric flasks.Volumetric flask A contain 0.1 mol dm-3 potassium hydroxide solution andvolumetric flask B contain 0.02 mol dm-3 potassium hydroxide solution.Rajah 5.2 menunjukkan larutan piawai kalium hidroksida dalam dua kelalangvolumetrik. Kelalang volumetrik A mengandungi larutan kalium hidroksida 0.1 moldm-3 dan kelalang volumetrik B mengandungi larutan kalium hidroksida 0.02 moldm-3.

Volumetric flask AKelalang Volumetrik A

0.1 mol dm-3 potassium hydroxide solution0.1 mol dm-3larutan kalium hidroksida

Volumetric flask BKelalang Volumetrik B

0.02 mol dm-3 potassium hydroxide solution0.02 mol dm-3larutan kalium hidroksida



(i) Calculate the mass of potassium hydroxide needed to prepare 100 cm3 of 0.1mol dm-3 potassium hydroxide solution in volumetric flask A.[Relative atomic mass: H = 1; O = 16; K = 39]Hitung jisim kalium hidroksida yang diperlukan untuk menyediakan 100 cm3

[2 marks][2 markah]

(iii) Potassium hydroxide solution in volumetric flask B is prepared using dilutionmethod.Calculate the volume of potassium hydroxide solution from volumetric flask Aneeded to prepare 200 cm3 of 0.02 mol dm-3 potassium hydroxide solution involumetric flask B.Larutan kalium hidroksida dalam kelalang volumetrik B disediakan melaluikaedah pencairan. Hitungkan isipadu larutan kalium hidroksida daripadakelalang volumetrik A yang diperlukan untuk menyediakan 200 cm3 larutankalium hidroksida 0.02 mol dm-3 dalam kelalang volumetrik B.

[1 mark][1 markah]

larutan kalium hidroksida 0.1 mol dm-3 dalam kelalang volumetrik A. [Jisimatom relatif: H = 1; O = 16; K = 39]



Gastric glandareaKawasankelenjar gastrik

EsofagusEsofagus


(c) Diagram 5.3 shows part of stomach and how the gastric pain occur from ourstomach. Gastritis caused by an imbalance of stomach acid that rises to theupper part of the stomach that causes inflammation in the mucosal lining of therelevant portion . Under normal circumstances in which stomach acid secretionis balanced, one does not encounter this problem. However in certaincircumstances where excessive secretion of stomach acid (hyperacidity)overcome the power of the mucosal layer, the occurrence of irritation orinflammation and cause pain. If excessive inflammation or mucosal lining ofthe injured were exposed to excess stomach acid for long periods of time forexample pain comes and goes frequently within a week, this can cause injurieswhich known as gastric ulcer.

Diagram 5.3 also shows Pn Aishah that suffer a gastric pain in a meeting. PnAishah took a sachet of gastric pain relief. After an hour Pn Aishah felt better.In your opinion how the medicine relief her pain. Suggest another alternativemedication that can be taken by Pn Aishah to relief her gastric pain.

After anhour

Selepassatu jam

StomachPerut

EsofagusEsofagus

Gastric Juice flowAliran jus gastrik



Rajah 5.3 menunjukkan bahagian perut dan bagaimana penyakit gastrikberlaku dalam perut kita. Gastrik berpunca dari ketidakseimbangan asid perutyang naik ke atas bahagian perut sehingga menyebabkan berlakunya inflamasipada lapisan mukosa bahagian berkaitan. Dalam keadaan normal di manarembesan asid perut adalah seimbang, seseorang tidak menghadapi masalahini. Walau bagaimanapun dalam keadaan tertentu di mana rembesan asidperut berlebihan mengatasi kekuatan lapisan mukosa, akan berlakunya iritasiatau keradangan dan mengakibatkan rasa sakit di bahagian tersebut. Jikakeradangan melampau atau lapisan mukosa yang tercedera itu terdedahdengan asid perut yang berlebihan untuk tempoh yang lama sebagai contohsakit berulang dengan kerap dalam tempoh seminggu, ini boleh menyebabkanberlakunya luka yang dikenali sebagai ulser gastrik.

Rajah 5.3 juga menunjukkan Pn Aishah yang mengalami sakit gastrik dalamsatu mesyuarat. Pn Aishah telah mengambil satu uncang ubat gastrik. Selepassatu jam, Pn Aishah berasa lebih baik.

Pada pandangan anda, bagaimana ubat gastrik tersebut mengurangkan rasasakit gastrik tersebut. Cadangkan perubatan alternatif yang boleh diambil olehPn Aishah untuk mengurangkan sakit akibat gastrik tersebut.

…………………………………………………………………………………..

…………………………………………………………………………………..

…………………………………………………………………………………..[3 marks]

[3 markah]



6. Diagram 6 show four reagent bottles contain propane, propene, propan-1-ol andpropanoic acid.Rajah 6 menunjukkan empat botol reagent yang mengandungi propana, propena,propan-1-ol dan asid propanoik.

Diagram 6 / Rajah 6

(a) State the homologous series for propene.Nyatakan siri homolog bagi propena

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

[1 markah ]

(b) Propene can be converted to propane. State the condition needed for the reaction.Propene boleh ditukarkan kepada propana. Nyatakan keadaan yang diperlukan bagipenukaran tersebut.

…………………………………………………………………………………………..[ 1 mark1 ][1 markah ]

(c) Draw the structural formula for propan-1-ol.Lukiskan formula struktur bagi propan-1-ol.

[ 1 mark ][1 markah ]

PropanePropana

PropanoicAcidAsid

Propanoik

Propan-1-olPropan-1-ol

PropenePropena

PropanePropana



(d) Propene can be converted to propane.Propena boleh ditukarkan kepada propana.

(i) Write the chemical equation for the reaction that occur.Tuliskan persamaan kimia bagi tindak balas yang berlaku.

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

[1 markah ]

(ii) Describe how to differentiate propane and propene using bromine water.Huraikan bagaimana membezakan propana dan propena menggunakanair bromin.

….……………………………………………………………………………………

……………………………………………………………………………………….[ 2 marks ]

[2 markah ]

(e) Propan-1-ol reacts with propanoic acid to formed a compound.Propan-1-ol bertindak balas dengan asid propanoik menghasilkan sebatian.

(i) Write the chemical formula for the compound formed.Tuliskan formula kimia bagi hasil yang terbentuk.

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

[1 markah ]

(ii) State one physical property for the compound formed.Nyatakan satu sifat fizik bagi sebatian yang terbentuk.

….……………………………………………………………………………………[1 mark1]

[ 1 markah ]



(f) Mimi and Mira were preparing rendang for Hari Raya Celebration. Mimi used acooking gas which is butane gas, C4H10. Mira used kerosene, C12H26. They found outthat the wok used on stove with kerosene was covered with lots of soot.Explain the reason for this condition and suggest a suitable fuel for cooking betweenbutane gas and kerosene.Mimi dan Mira sedang memasak rendang untuk Hari Raya. Mimi memasakmenggunakan dapur gas iaitu gas butana, C4H10, Mira menggunakan dapur minyaktanah, C12H26. Mereka mendapati kuali yang digunakan di atas dapur minyak tanahmempunyai jelaga yang banyak.Terangkan mengapa hal ini berlaku dan cadangkan bahan api di antara gas butanadan minyak tanah, yang manakah lebih sesuai digunakan utuk memasak.

……………………………………………………………………………………………

……………………………………………………………………………………………

……………………………………………………………………………………………

……………………………………………………………………………………………[ 3 marks ]

[ 3 markah ]



Section BBahagian B


Answer any one question from this section.Jawab mana-mana satu soalan daripada bahagian ini.

Diagram 7.1 / Rajah 7.1 Diagram 7.2 / Rajah 7.1


7 Diagram 7.1 shows the Silver Bridge which connected Point Pleasant, West Virginia,and Gallipolis, Ohio, over the Ohio River in United States of America. It was aneyebar-chain suspension bridge built in 1928 and named for the colour of itsaluminium paint.

In 1967, the Silver Bridge collapsed, resulting in the deaths of 46 people. Investigationof the wreckage pointed to the cause of the collapse being the failure of a single ironeyebar in a suspension chain, due to a small corrosion of defect 0.1 inch (2.5 mm)deep. The collapsed Silver Bridge is shown in Diagram 7.2.

Diagram 7.3 shows the point of failure of Silver Bridge at the eyebar chain number330.

Silver Bridge was replaced by The Silver Memorial Bridge which completed built in1969. The design of the bridge is much more proven than older Silver Bridge by usingstructural steel.

Eyebar chainMata rantai

Point of failuretitik kegagalan




Rajah 7.1 menunjukkan Jambatan Silver yang menghubungkan Point Pleasant, WestVirginia dan Gallipolis, Ohio, yang merentasi Sungai Ohio di Amerika Syarikat. Iamerupakan sebuah jambatan gantung menggunakan mata rantai besi yang dibinapada tahun 1928 dan dinamakan ‘Silver’ sempena warna catnya.

Pada 1967, Jambatan Silver telah runtuh yang mengakibatkan kematian 46 orang .Penyiasatan punca keruntuhan yang dilakukan mendapati bahawa terdapat kegagalanhanya pada satu mata rantai besi pada rantai penggantungan jambatan tersebut iaitudengan hanya pengaratan kecil sebanyak 0.1 inci (2.5 mm). Rajah 7.2 menunjukkanJambatan Silver yang telah runtuh.

Rajah 7.3 pula menunjukkan titik kegagalan Jambatan Silver.pada satu mata rantaiyang ke-330.

Jambatan Silver telah digantikan dengan Jambatan Silver Memorial yang siap dibinapada tahun 1969. Reka bentuk jambatan ini terbukti lebih baik daripada JambatanSilver sebelum ini dengan menggunakan keluli berstruktur.

(a) From the situation above, what is your opinion about older Silver Bridge and the newSilver Memorial Bridge in terms of the differences in building materials?Daripada situasi di atas, apakah pandangan anda tentang Jambatan Silver yang lamadan Jambatan Silver Memorial yang baru dari segi perbezaan dalam bahanbinaannya?

In your explaination,Dalam penerangan anda,

(i) State types of metal used to build both bridges.Nyatakan jenis logam yang digunakan untuk membina kedua-dua jambatantersebut

(ii) State two advantages for the types of metal that used in the construction ofSilver Memorial Bridge.Nyatakan dua kebaikan bagi jenis logam yang digunakan dalam pembinaanJambatan Silver Memorial.

(iii) Explain the differences in terms of arrangement of the atoms, why the types ofmetal in Silver Memorial Bridge is better than the eyebar chain metal used inSilver Bridge.Terangkan perbezaan dari segi susunan atom, mengapa jenis logam yangdigunakan dalam Jambatan Silver Memorial lebih baik berbanding logammata rantai yang digunakan dalam Jambatan Silver.

(iv) Draw the arrangement of metal used in the construction of Silver MemorialBridge and eyebar chain metal in Silver Bridge.Lukiskan susunan atom bagi logam yang digunakan untuk membina JambatanSilver memorial dan logam mata rantai Jambatan Silver.

[7 marks][7 markah]



(b) Natural rubber is a natural polymer which often vulcanized. Vulcanization is a processby which the natural rubber is heated and are added with sulfur and peroxide toimprove resistance and elasticity. It is also to prevent it from perishing. One of theuses of vulcanized rubber is to make tyre of the car which is a synthetic polymer.Getah asli merupakan polimer semulajadi yang biasanya divulkankan. Pemvulkananialah suatu proses di mana getah asli dipanaskan dan ditambahkan dengan sulfurserta peroksida untuk meningkatkan ketahanan dan keelastikannya. Ia juga untukmengelakkan getah daripada mereput.

From the above statements,Daripada pernyataan di atas,

(i) State the meaning of polymerNyatakan maksud polimer

[1 mark][1 markah]

(ii) State the name of monomer in natural rubber.Nyatakan nama monomer bagi getah asli.

[1 mark][1 markah]

(iii) Draw the structural formula of natural rubber monomer.Lukiskan formula struktur bagi monomer getah asli.

[1 mark][1 markah]

(iv) Unwanted or damaged tyre need to be disposed wisely to prevent the pollution.Discuss the pollution caused by synthetic polymer and state the way to controlit.Tayar kereta yang tidak diperlukan atau rosak hendaklah dilupuskansebaiknya untuk mengelakkan pencemaran. Bincangkan pencemaran yangdisebabkan oleh polimer sintetik dan nyatakan kaedah untuk mengawalnya.

[5 marks][5 markah]



(c) Table 7 shows three types of manufactured substances in industry.Jadual 7 menunjukkan tiga jenis bahan buatan dalam industri.

Types ofmanufactured

substancesJenis Bahan Buatan

ExampleContoh

UsesKegunaan

P

PorcelainPorselin

BricksBatu bata

Flowerpotpasu bunga

Construction materialsBahan binaan

Composite MaterialBahan Komposit

Fibre GlassKaca Gentian

Q

GlassKaca R

Laboratory apparatusRadas makmal

Kitchen utensilAlat memasak

Table7 / Jadual 7

From table 7 above, stateDaripada Jadual 7 di atas, nyatakan

(i) types of manufactured substance PJenis bahan buatan P

(ii) one uses of composite material, Qsatu kegunaan bahan komposit, Q

(iii) name glass R.namakan gelas R

(iv) State two advantages of fibre glass compare to glass R.Nyatakan dua kelebihan kaca gentian berbanding gelas R.

[5 marks][5 markah]



8. Diagram 8.1 show two methods to prepare a salt.Rajah 8.1 menunjukkan dua kaedah menyediakan suatu garam.

Method IKaedah I

Method IIKaedah II


(c) Based on the diagram above,Berdasarkan rajah di atas,

(i) State example of salt that can be prepared using method I and II,Nyatakan contoh garam yang dapat disediakan menggunakan kaedah I dan II

[ 2 marks ][2 markah ]

(ii) Based on Diagram 8.1, compare and contrast the method used to prepare the salt.Berdasarkan Rajah 8.1, banding dan bezakan kaedah yang digunakan untukmenyediakan garam.

[ 4 marks ][4 markah ]

HeatPanaskan

HeatPanaskan

HeatPanaskan



(d) Diagram 8.2 shows the reaction scheme of zinc carbonate.Rajah 8.2 menunjukkan skema tindak balas bagi zink karbonat.


Zinc carbonate reacts with nitric acid to produced salt X, gas Y and water. Gas Y turnslime water chalky.Zink karbonat bertindak balas dengan asid nitric menghasilkan garam X, gas Y dan air.Gas Y menukarkan air kapur menjadi keruh.

(i) Based on Diagram 8.2, identify salt X, gas Y and Substance Z.Berdasarkan Rajah 8.2, kenalpasti garam X, gasY dan sebatian Z

[ 3 marks ][ 3 markah ]

(ii) Describe briefly chemical tests to verify. The cation and anion in substance X.Huraikan secara ringkas ujian kimia untuk mengenalpasti kation dan aniondi dalam bahan X

[4 marks ][4 markah ]

(iii) Excess zinc carbonate is added to 100 cm3 of 1.0 mol dm-3 of nitric acid.Write the chemical equation for the reaction and calculate the volume of gas Yproduced at room conditionZink karbonat berlebihan di tambahkan kepada 100 cm3 asid nitrik, 1.0 mol dm-3.Tuliskan persamaan kimia bagi tindak balas ini dan hitungkan isipadu gas Y yangdihasilkan pada keadaan bilik.[1 mol gas menempati 24 dm3 pada keadaan bilik]

[5 marks ][5 markah ]

ZnCO3 HNO3 Gas YX H2O

Salt XZ Gas Y

+++

+

HeatingPemanasan

CrystallisationPenghabluran



(e) Fertilization is a component of the cost of planting the highest (50-60 % ) in a farmoperation. Many farms have managed to increase revenue through a good qualityfertilizers. However there are also some farms that have spent a lot of money for thistype of steel that thinks best, works pilot leaf / soil and the analysis and modify therate of fertilizer applied but did not take advantage of these efforts due to negligenceand improper supervision or comprehensive in the farm.Nitrogen (N) is important in the formation of chlorophyll, protein and some enzymesin plants. Its affect leaf area, leaf colour and leaf production rate. Nitrogen glaringdeficiency in young palms planted on shallow -profile areas, sandy or well drainedsoils. Nitrogen fertilizer sources such as ammonium sulphate, urea and ammoniumnitrate.Pembajaan merupakan komponen kos penanaman yang paling tinggi (50-60%)dalam sesuatu operasi ladang. Banyak ladang yang telah berjaya meningkatkanhasil melalui kualiti pembajaan yang baik. Namun begitu tidak kurang juga ladang-ladang yang telah membelanjakan wang yang banyak untuk jenis baja yangdifikirkan terbaik, kerja percontohan daun/tanah serta analisis dan mengubah suaikadar baja yang ditabur tetapi tidak memanfaatkan usaha-usaha ini disebabkankelalaian dan penyeliaan yang tidak sempurna atau menyeluruh di ladang.Nitrogen (N) penting dalam pembentukan klorofil, protein dan beberapa enzimdalam tumbuhan. Ia memberi kesan terhadap luas permukaan daun, warna daun dankadar penghasilan daun. Kekurangan nitrogen amat nyata pada pokok sawit mudayang ditanam pada kawasan berprofil cetek, berpasir ataupun tanah yang tidakbersaliran baik. Sumber baja nitrogen contohnya ammonium sulfat, urea danammonium nitrat

Palm trees in the picture A lush palm trees while the image B has yellowed leaves .This shows the lack of basic nitrogen. You are given two types of fertilisers , namelyammonium sulfate , ( NH4)2SO4 and ammonium nitrate, NH4NO3.Define and explain the fertiliser which is more suited to nourish the palm treesPokok kelapa sawit dalam gambar A subur manakala pokok kelapa sawit dalamgambar B mempunyai daun yang kekuningan. Ini menunjukkan pokok tersebutkekurangan nitrogen. Anda diberikan dua jenis baja iaitu ammonium sulfat, (NH4)2SO4

dan ammonium nitrat NH4NO3. Tentukan dan jelaskan baja mana yang lebih sesuaidigunakan bagi menyuburkan pokok kelapa sawit tersebut.

[2 marks][2 markah]

Picture B /Gambar BPicture A /Gambar A



Section CBahagian C


Answer any one question from this section.Jawab mana-mana satu soalan daripada bahagian ini

9 Maryam helped her mother cleaned the cockles before cooking them. Accidentally shepoured vinegar into the bowl containing cockles. Maryam found effervescence occured.She asked her mother who is a chemistry teacher why effervescence occur. Her motherexplained that cockle shells contain calcium carbonate that can react with vinegar whichis acidic to release carbon dioxide gas. Therefore, Maryam brought the cockle shells tothe school laboratory to carry out an experiment to investigate the reaction between thecockle shells and hydrochloric acid. Table 9 shows the information for three set ofexperiments carried out by Maryam.Maryam menolong ibunya membersihkan kerang yang hendak dimasak. Secara tidaksengaja dia tercurah cuka ke dalam mangkuk yang berisi kerang. Maryam dapatiterdapat pembuakan. Dia bertanyakan kepada ibunya seorang guru kimia kenapapembuakan berlaku. Ibunya menjelaskan bahawa kulit kerang mengandungi kalsiumkarbonat yang boleh bertindak balas dengan cuka yang bersifat asid untuk membebaskangas kabon dioksida. Oleh itu, Maryam membawa kulit kerang ke makmal sekolah untukmenjalankan ekperimen mengkaji tindak balas antara kulit kerang dengan asidhidroklorik. Jadual 9 menunjukkan maklumat bagi tiga set eksperimen yang dijalankanoleh Maryam.

ExperimentEksperimen

Information of the investigationMaklumat penyiasatan

Set I5g of crushed cockle shell and 50 cm3 of 0.1 moldm-3 hydrochoric acid at 30oC5g serpihan kulit kerang dan 50 cm3 asid hidroklorik 0.1 moldm-3 pada 30oC

Set II5g of crushed cockle shell and 50 cm3 of 0.2 moldm-3 hydrochoric acid at 30oC5g serpihan kulit kerang dan 50 cm3 asid hidroklorik 0.2 moldm-3 pada 30oC

Set III5g of crushed cockle shell and 50 cm3 of 0.2 moldm-3 hydrochoric acid at 40oC5g serpihan kulit kerang dan 50 cm3 asid hidroklorik 0.2 moldm-3 pada 40oC

Table 9 / Jadual 9

Diagram 9 shows the graph of volume of gas collected against time for experiment Set IIsketched by Maryam.Rajah 9 menunjukkan graf isi padu gas dikumpul melawan masa bagi eksperimen Set II yangdilakar oleh Maryam.




Diagram 9 / Rajah 9

(a) Based on the information in Table 9 and graph in Diagram 9, sketch the curve for thevolume of gas against time for Set I, Set II and Set III on the same axes.Berdasarkan maklumat dalam Jadual 9 dan graf dalam Rajah 9, lakarkan lengkungbagi isi padu gas melawan masa bagi Set I, Set II dan Set III pada paksi yang sama.

[2 marks][2 markah]

(b) Explain how you obtain the curve for Set I and Set III in (a).Terangkan bagaimana anda memperolehi lengkung bagi Set I dan Set III di (a).

[8 marks][8 markah]

(c) By referring to collision theory, explain the difference in the rate of reaction betweenDengan merujuk kepada teori perlanggaran, terangkan perbezaan kadar tindakbalas antara

(i) Set I and Set IISet I dan Set II

(ii) Set II and Set IIISet II dan Set III


V

Set II

Time / sMasa / s

Volume of gas / cm3

Isi padu gas / cm3



10 (a) Puan Siti who is a caring mother and always guide her childrens to be independent.Dialogue I and Dialogue II is the conversation between Puan Siti and her childrensAdam and Munirah in two different situation.Puan Siti seorang ibu yang prihatin dan selalu membimbing anak-anaknya untukberdikari. Dialog I dan Dialog II merupakan perbualan antara Puan Siti dengananak-anaknya Adam dan Munirah dalam dua situasi berbeza.

DIALOGUE IDIALOG I

Adam : Mother, my stomach is bloating and uncomfortable.Mak, perut saya kembung dan tidak selesa.

Puan Siti : Take this ENON and mix with a glass of water. Then drink ENON solutionto eliminate bloating.Ambil ENON ini dan campurkan dengan segelas air. Kemudian minumlarutan ENON itu untuk menghilangkan kembung perut.

Adam pour ENON powder into a glass of water.Adam menuangkan serbuk ENON ke dalam segelas air

Adam : Ugh! ENON solution is cool……Eh! Larutan ENON sejuklah……

DIALOGUE IIDIALOG II

Puan Siti : Munirah, please wash this dirty clothes. Don’t forget to dissolve the soappowder into the water before soaking the clothes.Munirah, tolong basuh pakaian kotor ini. Jangan lupa untuk melarutkanserbuk sabun dalam air sebelum merendam pakaian tersebut.

Munirah takes a handful of soap powder and put it into a pail of waterMunirah mengambil segenggam serbuk sabun dan memasukannya ke dalam satu baldiberisi air.

Munirah : Ugh! My hand feels hot when the soap in my hand mix with waterEh! Tangan saya berasa panas apabila sabun pada tangan saya bercampurdengan air.



Information for ENON solution taken by Adam and soap solution used by Munirah isshown in Diagram 10.1Maklumat bagi larutan ENON yang diminum oleh Adam dan larutan sabun yangdigunakan oleh Munirah ditunjukkan dalam Rajah 10.1

SubstanceBahan

ENON SoapSabun

MainIngredientKandunganutama

Sodium hydrogen carbonateNatrium hidrogen karbonat

Sodium stearateNatrium stearate

Persamaantindak balas

NaHCO3 + H2O → Na+ + HCO3- C₁₇H₃₅COONa + H2O → Na+ + C₁₇H₃₅COO-


(i) Based on information in Dialogue I, Dialogue II and Diagram 10.1, identify thetype of reaction occur in each situation. Draw the energy level diagram whenBerdasarkan maklumat dalam Dialog I, Dialog II dan Rajah 10.1, kenal pastijenis tindak balas yang berlaku dalam setiap situasi. Lukis gambar rajah arastenaga apabila

Adam dissolve ENON in water.Adam melarutkan ENON dalam air.

Munirah dissolve soap powder in water.Munirah melarutkan serbuk sabun dalam air.

[6 marks][6 markah]

(ii) Compare the different in the energy level diagram drawn in (a)(i).Bandingkan perbezaan dalam gambar rajah aras tenaga yang dilukis di (a)(i).

[4 marks][4 markah]



(b) Diagram 10.2 shows two type of labor gas, X and Y that can be used by the scout forcooking during camping. The labor gas is filled with different fuel. As a chemistrystudent, you are require to help the scout to choose which labor gas is better based onthe value of heat of combustion of fuel.Rajah 10.2 menunjukkan dua jenis tabung gas, X dan Y yang boleh digunakan olehpengakap untuk memasak semasa perkhemahan. Tabung gas itu diisi dengan duajenis bahan api berbeza. Sebagai seorang pelajar kimia, anda dikehendaki membantupengakap itu memilih tabung gas manakah yang lebih baik berdasarkan nilai habapembakaran bahan api.

Labor gas XTabung gas X

Labor gas YTabung gas Y


Describe how you determine the heat of combustion of fuel in the labor gas. Includein your answer all the calculation involve.[Molar mass of fuel in labor gas X = 58 gmol-1 ;Molar mass of fuel in labor gas Y = 72 gmol-1]Huraikan bagaimana anda boleh menentukan haba pembakaran bahan api dalamtabung gas. Sertakan dalam jawapan anda semua pengiraan yang terlibat.[Jisim molar bahan api dalam tabung gas X = 58 gmol-1 ;Jisim molar bahan api dalam tabung gas Y = 72 gmol-1]


END OF QUESTION PAPERKERTAS SOALAN TAMAT




INFORMATION FOR CANDIDATESMAKLUMAT UNTUK CALON

1. This question paper consists of three sections: Section A, Section B and Section C.

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

2. Answer all questions in Section A. Write your answers for Section A in the spaces provided inthe question paper.

Jawabsemua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yangdisediakan dalam kertas soalan

3. Answer one question from Section B and one question from Section C.Write your answers for Section B and Section C on the `answer sheet’ provided by the invigilators.Answer questions in Section B and Section C in detail.You may use equations, diagrams, tables, graphs and other suitable methods to explain your answer.

Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Tuliskanjawapan bagi Bahagian B dan Bahagian C pada kertas tulis yang dibekalkan oleh pengawaspeperiksaan. Jawab Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakanpersamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

4. The diagrams in the questions are not drawn to scale unless stated.

Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan

5. Marks allocated for each question or sub-part of the question is shown in brackets.

Markah yang diperuntukkan bagi setiap soalan 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, neatly cross out the answer that you have done. Then writedown the new answer.

Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.


Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

9. You are advised to spend 90 minutes to answer questions inSection A, 30 minutes for Section Band 30 minutes for Section C.

Anda dicadangkan mengambil masa 90 minit untuk menjawab soalan dalamBahagian A,30 minit untukBahagian B dan 30 minit untuk BahagianC.

10. Tie together your answer sheets at the end of the examination.

Ikat semua kertas jawapan anda di akhir peperiksaan.

SULIT 4541/3

1

Answer all questionsJawab semua soalan

1. Two experiments are conducted by students to determine the heat of neutralisation.Dua eksperimen dijalankan oleh para pelajar untuk menentukan haba peneutralan.

Experiment IEksperimen I

Reaction between 25 cm3 of potassium hydroxide solution, KOH, 2.0 moldm-3 and 25cm3 of ethanoic acid, CH3COOH, 2.0 moldm-3.Tindak balas antara 25 cm3 larutan kalium hidroksida , KOH, 2.0 moldm-3 dan 25 cm3

acid etanoik, CH3COOH, 2.0 moldm-3.

Initial temperature of the mixture : …………….oCSuhu awal campuran

Highest temperature of the mixture :…………….oCSuhu tertinggi campuran

Change in temperatre :…………….oCPerubahan suhu

ForExaminer’s

Use

Diagram 1.1Rajah 1.1

BeakerBikar

Polystyrene cupCawan polistirena


StirredDikacau

Potassium hydroxide solutionLarutan kaliumhidroksida

Mixture of potassium hydroxide solution andethanoic acidCampuran larutan kaliumhidroksida dan asid etanoik


SULIT 4541/3

2

Experiment IIEksperimen II

Reaction between 25 cm3 of potassium hydroxide solution, KOH, 2.0 moldm-3 and25 cm3 of hydrochloric acid, HCl, 2.0 moldm-3.

Tindak balas antara 25 cm3 larutan kalium hidroksida , KOH, 2.0 moldm-3 dan 25 cm3

asid hidroklorik , HCl, 2.0 moldm-3

(a) Write the initial and the highest temperature of the mixture and change in temperature forExperiment I and Experiment II,Tulis suhu awal dan suhu tertinggi campuran serta perubahan suhu untuk Eksperimen Idan Eksperimen II.

[3 marks][3 markah]

Initial temperature of the mixture : …………….oCSuhu awal campuran

Highest temperature of the mixture :…………….oCSuhu tertinggi campuran

Change in temperatre :…………….oCPerubahan suhu

ForExaminer’s

Use

1(a)

3



StirredDikacau

Diagram 1.2Rajah 1.2

BeakerBikar

3

Potassium hydroxide solutionLarutan kalium hidroksida

Mixture of potassium hydroxidesolution and hydrochloric acidCampuran larutan kaliumhidroksida dan asid hidroklorik

SULIT 4541/3

3

(b) Construct a table to show all the data in each of these experiments.Bina satu jadual untuk menunjukkan semua data dalam setiap eksperimen ini.

[3 marks][3 markah]

(c ) State the variables for this experiment.Nyatakan pemboleh ubah bagi eksperimen ini.

(i) Manipulated variable:Pemboleh ubah dimanipulasikan:

…………………………………………………………………………………….(ii) Responding variable

Pemboleh ubah yang bergerak balas

…………………………………………………………………………………….(iii) Fixed variable

Pemboleh ubah dimalarkan

…………………………………………………………………………………….[3 marks]

Nyatakan satu hipotesis bagi kedua-dua eksperimen.

……………………………………………………………………………………………..[3 marks]

[3 markah](e) State the operational definition for the experiment.

Nyatakan definisi secara operasi bagi eksperimen berkenaan.

……………………………………………………………………………………..[3 marks]

[3 markah]

ForExaminer’s

Use

3

1(b)

3

1(d)

3

1(e)

3

1( c)

[3 markah](d) State the hypothesis for both experiments

SULIT 4541/3

4

(f) Based on the data from experiment II, calculate the :Berdasarkan data dari eksperimen II, hitungkan :

(i) number of molebilangan mol

(ii) heat releasehaba yang dibebaskan

(iii) heat of neutralisationhaba peneutralan

[3 marks][3 markah]

(g) State three different observations and the corresponding inferences from Experiment I orExperiment II in Table 1.1.

Nyatakan tiga pemerhatian yang berbeza dan inferens yang sepadan dari Eksperimen Idan eksperimen II dalam Jadual 1.1

[6 marks][6 markah]


InferenceInferens

1. 1

2. 2

3. 3

ForExaminer’s

Use

3

1(f)

6

1(g)

SULIT 4541/3

5

(h) The following chemical equation represents the reaction in Experiment II.Persamaan kimia berikut mewakili tindak balas dalam Eksperimen II

HCl(aq) + KOH (aq) KCl(aq) +H2O(l) Heat of neutralisation, ∆H = -57 kJmol-1

If hydrochloric acid is replaced by sulphuric acid of the same concentration, predict thevolume of sulphuric acid needed to achieve the same value of heat of neutralization,∆H = -57 kJmol-1 ?

Jika asid hidroklorik digantikan dengan asid sulfurik yang berkepekatan sama,ramalkan isipadu bagi asid sulfurik yang diperlukan untuk mencapai nilai habapeneutralan yang sama. ∆H = -57 kJmol-1

………………………………………………………………………………………………[3 marks]

[3 markah]

(i) After the highest temperature in Experiment I is taken, leave the mixture for the while.Then read the temperature again. What will happen to the temperature of the mixture?Selepas suhu tertinggi dalam Eksperimen I di ambil, campuran di biarkan seketika. Suhu

diambil semula. Apakah yang akan berlaku pada suhu campuran itu? Explain why.

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

………………………………………………………………………………………………….[3 marks]

[3 markah](j) Classify the reactions in our everyday life below as either exothermic reactions or

endothermic reactions.Kelaskan tindak balas tindakbalas dalam kehidupan harian di bawah sama ada tindakbala eksotermik atau endotermik.

PhotosynthesisFotosintisis

Nuclear fissionPembelahan nuklear

Rusting of ironPengkaratan besi

Melting of ice cubesPeleburan ketulan air batu

Water evaporationPenyejatan air

CombustionPembakaran

3

1(i)

ForExaminer’s

Use

3

1(h)

SULIT 4541/3

6

[3 marks][3 markah]

Exothermic reactionTindak balas eksotermik

Endothermic reactionTindak balas endotermik

3

1(j)

ForExaminer’s

Use

SULIT 4541/3

7

Diagram 2Rajah 2

Cloth becomes cleanPakaian menjadi bersih

Dirty cloth is washed using cleansingagent Y in hard waterPakaian kotor dicuci dengan agenpencuci Y dalam air liat

The cloth remain dirty and scumis formedPakaian kekal kotor dan kekatterbentuk

Dirty cloth is washed using ceansingagent X in hard waterPakaian kotor dicuci dengan agenpencuci X dalam air liat

SULIT 4541/3

8

2. Based on observation in diagram 2, plan an experiment to investigate the effectiveness ofcleansing agent X and cleansing agent Y in hard water .Berdasarkan pemerhatian dalam rajah 2, rancang satu eksperimen untuk mengkajikeberkesanan agen pencuci X dan agen pencuci Y dalam air liat.

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

a) Aim of the experimentTujuan eksperimen

b) All the variablesSemua pembolehubah

c) Statement of the hypothesisPernyataan hipotesis

d) Lists of substances and apparatusSenarai bahan dan alat radas

e) Procedure for the experimentProsedur eksperimen

f) Tabulation of dataPenjadualan data [17 marks]

[17 markah]

END OF QUESTION PAPERKERTAS SOALAN TAMAT


SULIT 4541/3

9

MAKLUMAT UNTUK CALON

1. Jawab semua soalan.

2. Jawapan kepada Soalan 1 hendaklah ditulis dalam ruangan yang disediakan dalamkertas soalan.

3. Jawapan kepada Soalan 2 hendaklah ditulis pada helaian tambahan. Anda bolehmenggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untukmenjelaskan 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 tidak dilukiskan mengikut skala kecuali dinyatakan.

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

8. Masa yang dicadangkan menjawab Soalan 1 ialah 45 minit dan Soalan 2 ialah 45 minit.

9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

10. Kertas soalan ini hendaklah diserahkan di akhir peperiksaan.

Pemberian markah:

Markah Penerangan3 Cemerlang : Respons yang paling baik2 Memuaskan: Respons yang sederhana1 Lemah: Respons yang kurang tepat0 Tiada respons atau respons salah

SULIT 4541/3

10

INFORMATION FOR CANDIDATES

1. Answer all questions.

2. Write your answer for Question 1 in the spaces provided in the question paper.

3. Write your answers for Question 3 on the extra sheet. You may use equations, diagrams,tables, graphs and other suitable methods to explain your answer.

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 provided 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 answer Question 1 is 45 minutes and Question 2 is 45 minutes.


10. This question paper must be handed in at the end of the examination.

Marks awarded:

Mark Description3 Excellent: The best response provided2 Satisfactory: An average response provided1 Weak: An inaccurate response provided0 No response or wrong response provided

SKEMA PERMARKAHAN4541/1

CHEMISTRYPaper 1 4541/1



SKEMA JAWAPAN PRAKTIS BESTARIKERTAS 1

JUJ KIMIA 2015

1 A 11 B 21 A 31 A 41 C

2 C 12 D 22 A 32 B 42 B

3 D 13 A 23 D 33 B 43 C4 B 14 D 24 A 34 D 44 A

5 C 15 B 25 D 35 C 45 D

6 A 16 B 26 A 36 C 46 D

7 C 17 B 27 C 37 A 47 C

8 A 18 A 28 A 38 C 48 B

9 D 19 D 29 C 39 C 49 B

10 D 20 A 30 B 40 D 50 C


1

MARKING SCHEME CHEMISTRY PAPER 2PRAKTIS BESTARI PROJEK JAWAB UNTUK JAYA (JUJ) TAHUN 2015

Question Answer Submark ∑ Mark1(a)(i) Total number of proton and neutron in an atom 1 1

(ii) Electron 1 1

(iii) 1. S and T2. Atom of the same element with same proton number

but different nucleon number

11 2

(iv) 1 1

(v) U2412

1 1

(b)(i) Ammonium chloride 1 1

(ii) 1. Ammonia2. Ammonia moves faster because the molecular mass of

ammonia is lighter

11 2

TOTAL 9

Question Answer Submark ∑ Mark2(a)(i) The chemical formula that shows the actual number of an

atom of element in a compound1 1

(ii) C2H3O3 1 1

(iii) Molecular formula shows the actual number of atom whileempirical formula shows the simplest ratio of atom //The number of carbon atom, hydrogen atom and oxygenatom in molecular formula is greater than in empiricalformula.

1 1

(b)(i) Reactants : Potassium iodide and lead(II) nitrateProducts : Potassium nitrate and lead iodide

11 2

(ii) Solid 1 1

(iii) Number of mole Pb(NO3)2 = // 0.025

1 mole Pb(NO3)2 produce 1 mole PbI2 //0.025 moles Pb(NO3)2 produce 0.025moles PbI2

Mass of PbI2 = 0.025 x [207 + 2(127)]g // 11.525g

1

1

1 3

TOTAL 9


2

Question 3Answer Submark ∑ Mark

3 (a) (i) Group 2 because atom has 2 valens electronKumpulan 2 kerana atom mempunyai 2 elektron valens

Period 3 because atom has 3 shell filled with electronKala 3 kerana atom mempunyai 3 petala berisi elektron

1

1

2

(ii) Oxide that can react with both acid and alkaliOksida yang dapat bertindak balas dengan asid dan alkali

Element Y /Unsur Y

1

1

2

(iii) Blue litmus paper turns redKertas litmus biru menjadi merah

1 1

(b) (i) Contact Process / Proses Sentuh 1 1

(ii) Vanadium(V) oxide / Vanadium(V) oksida 1 1

(iii) SO3 + H2SO4 → H2S2O7 1 1

(iv) 1. To manufacture detergent / Pembuatan detergen2. To manufacture fertilizers/ Pembuatan baja3. To manufacture paints / Pembuatan cat4. As electrolyte in car batteries / Sebagai elektrolit bateri

kenderaan

1+1(any 2)

2

TOTAL 10

Question Answer Sub mark ∑ marks4(a) (i) Electrolytic cell 1

2(ii) Voltaic cell // chemical cell 1

(b) (i)Cu2+ + 2e → Cu-correct formula of reactans and products-correct balance

11

2

(ii) -Blue colour turns light/pale blue/colourless // intensity ofthe blue colour decreases

- concentration of Cu2+ decreases //Cu2+ ions discharged to form Cu atom

1

12

(c) (i) Na+ , NO3- , H+ , OH- 1 1

(ii) Oxygen gas 1 1

(d) -vinegar/lime juice/lemon juice/salts solution (*any suitableelectrolyte that can be found at the kitchen)- contain free moving ions

1

12

TOTAL 10

3

Question Answer Sub mark ∑ marks

5(a) (i) Acid : bleach solution, apple juice 1 + 1 2

(ii) -Liquid detergent-concentration of OH- is higher than magnesia milk

1 + 1 2

(iii) Acid which ionised partially in water to produce lowconcentration of H+ ions. 1 1

(b) (i) 1. Number of mol100(0.1) / 1000 // 0.01

2. Mass with correct unit0.01 x 56 g // 0.56 g

1

1 2

(ii) Correct volume with unit200(0.02) cm3 // 40 cm3 1 1

(c) - Gastric relief/medicine is alkaline- Neutralised acid produce in stomach

Able to suggest the alternative medication-sodium bicarbonate solution//* any suitable alkaline substances

11

1

3

TOTAL 11

Question Answer Submark ∑ Mark

6 (a) Alkene / Alkena 1 1

(b) Temperature/suhu : 300OCCatalyst/mangkin : Phosphoric acid, H3PO4

Pressure /tekanan : 60 atm

1 1

(c) 1 1

(d) (i) C3H6 + H2 → C3H8 1 1

(ii) 1. Pour 2 cm3 of propane and propene into 2 test tubes,add bromine water and shake the test tubes.Tuangkan 2 cm3 propana dan propena kedalam 2 buahtabung uji, tambah air bromine dan goncangkantabung uji

2. Propane – brown colour remain unchangesPropana – warna perang air bromine tidak berubah

Propene – brown colour turns colourlessPropena – Warna perang air bromine menjadi tidak

berwarna

1

1

2

4


(e) (i) C2H5COOC3H7 1 1

(ii) 1. In soluble in water / tidak larut dalam air2. Volatile / meruap3. Low boiling point / takat didih rendah4. Soluble in organic solvent / larut dalam pelarut organik5. Less dense than water / kurang tumpat dari air

1

(any 1)

1

(f) 1. Percentage of C in C4H10 = 82.75%Peratus C dalam C4H10

Percentage of C in C12H26 = 84.71%Peratus C dalam C12H26

2. Number of carbonatom in C12 H26 is more than C4H10

Bilangan atom karbon di dalam C12 H26 lebih banyakdaripada C4H10

3. C4H10 is more suitable to be used as a cooking fuelC4H10 lebih sesuai digunakan sebagai bahan apimemasak

1

1

1

3

TOTAL 11


7 (a)(i)

(ii)

(iii)

(iv)

Able to state types of metal for both bridges correctlyAnswer :- Silver Bridge : iron & Silver Memorial Bridge : steel

Able to state two advantages for the types of metal used inthe construction of Silver Memorial Bridge correctlySample answer :- Steel is more resistant to corrosion- Steel is harder than iron/its pure metal

Able to explain why steel is better than iron- Presence of carbon atom/foreign atom distrupt the

orderly arrangement of iron atom- Atom in steel difficult to slide each other easily.

Steel iron

1

11

1

1

1+1

7

Fe

C

5


(b) (i) Polymer is a long chain molecule that consist of repeated subunit that is called monomer

1 1

(b)(ii) Isoprene / 2-methylbut-1,3-diene 1 1

(b)(iii)H H H| | |

H-C=C-C=C-H|

H-C-H|

H

1 1

(b)(iv) -Non-biodegration/ cannot be decomposed by bacteria-when throw in the drain causes drain clogged/rubbish-Mosquito breeding-When it is burnt produces poisonous gas/ carbon monoxide

Able to state the way to overcome-Recycle / artificial ‘tukun’/Combustion in absence ofoxygen / pyrolysis/ combustion in incenerator

1111

1

5

(c)(i) ceramics 1

5

(c)(ii) To make water storage tanks/boat/helmets*any suitable example

1

(c)(iii) Borosilicate glass*correct spelling

1

(c)(iv) Able to state two advantages of fibre glass compare to glassR-High tensile strength-low density-easy molded in thin layer-light-strong/hard* any two

1+1

TOTAL 20

6

Question Answer Submark ∑ Mark8 (a) (i) Method I : NaNO3/NaCl/Na2SO4/KNO3/KCl/K2SO4

Kaedah I

Method II: MgSO4 / CuCl2 / Zn(NO3)2

Kaedah II

1

12

(ii) Similarities of method I and method IIPersamaan kaedah I dan kaedah II

1. Both are soluble saltKedua-duanya adalah garam terlarut

2. Filtered to obtain the saltPenurasan perlu untuk mendapatkan garam

Differences of method I and method IIPerbezaan kaedah I dan kaedah II

1. Method I used reaction between acid and alkali whereasmethod II used reaction between oxide metal orcarbonate metal and acidKaedah I menggunakan tindak balas acid dan alkalimanakala kaedah II menggunakan tindak balas antaraoksida logam atau karbonat logam dengan asid

2. Method I involve only one filtration whereas method IIinvolve two filtrationKaedah II melibatkan penurasan sekali sahaja manakalakaedah II melibatkan penurasan dua kali.

1

1

1

1

4

(b) (i) Salt X : Zinc nitrate / Zn(NO3)2

Garam X: Zink nitrat / Zn(NO3)2

Gas Y : Karbon dioxide / CO2

Gas Y :Karbon dioksida / CO2

Substance Z : Zinc oxide / ZnOBahan Z : Zink oksida / ZnO

1

1

1

3

(ii)Chemical test for cation (Zn)Ujian kimia bagi kation (Zn)

i. Add NaOH solution into a test tube contain cation in excess,white precipitate formed soluble in excess NaOH.

Tambahkan larutan NaOH ke dalam tabung uji yangmengandungi kation dengan berlebihan, pepejal putihterbentuk dan larut dalam NaOH berlebihan

ii. Add Ammonia solution into a test tube contain cation inexcess, white precipitate formed soluble in excessammonia solution.Tambahkan larutan ammonia ke dalam tabung uji yangmengandungi kation dengan berlebihan, pepejal putihterbentuk dan larut dalam ammonia berlebihan

1

1

7

Question Answer Submark ∑ MarkChemical test for anion NO3-

Ujian kimia bagi anion NO3-

i. Add diluted sulphuric acid and iron(II) sulfate into 2 cm3

solution X and shake.Tambahkan asid sulfurik cair dan larutan ferum(II) sulfat ke

dalam tabung uji yang mengandungi larutan X dan goncang.

ii. A few drop of concentrated sulphuric acid is added slowlydown the side the slanting test tube, brown ring formedBeberapa titis asid sulfurik ditambah perlahan-lahanmelalui dinding tabung uji yang dicondongkan. Cincinperang terbentuk.

1

1

4

(iii) ZnCO3 + 2HNO3 → Zn(NO3)2 + CO2 + H2Oi. Correct formulae of reactant and product

Formula bahan dan hasil yang betulii. Balanced equation

Persamaan seimbang

1. No of mol HNO3 = 1(100) / 1000 // 0.1 mol

2. 2 mol HNO3 → 1 mol CO2

0.1 mol → 0.05 mol CO2

3. Volume of CO2 = 0.05 x 24dm3 // 1.2 dm3

Isipadu CO2

1

1

1

1

1

5

(c) - Ammonium nitrateAmmonium nitrate

- because the percentage of nitrogen atom per molecule inammonium nitrate is higher than ammonium sulphatesebab peratus nitrogen atom per molekul dalam ammoniumnitrat lebih tinggi daripada ammonium sulfat

1

1 2

TOTAL 20

8


9(a) 1. Correct initial rate of reaction for set I and III2. Correct maximum volume of set I and III

11 2

(b) 1. Rate of reaction in Set I is lower than Set II //Rate of reaction in Set I is the lowest

2. Concentration of HCl in Set I is lower than Set II3. Maximum volume of gas collected in Set I is half

compare to Set II4. The number of moles of HCl used in Set I is half

compare to Set II5. Rate of reaction in Set III is higher than Set II //

Rate of reaction in Set III is the highest.6. Temperature in Set III is higher than Set II7. Maximum volume of gas collected in Set III is same as

in Set II8. The number of moles of HCl used in Set III is the same

as in Set II

1

111

1

11

1

8

(c)(i) Set I and Set II1. Rate of reaction in Set II is higher than Set I2. The concentration of hydrochloric acid in Set II is

higher than Set I3. The number of HCl / H+ ion perunit volume in Set II is

higher than Set I4. The frequency of collision between cockle shell /

calcium carbonate and H+ ion in Set II is higher thanSet I

5. The frequency of effective collision in Set II is higherthan Set I

11

1

1

1 5

(ii) Set I and Set II1. Rate of reaction in Set III is higher than Set II2. The temperature in Set III is higher than Set II3. The kinetic energy of particle in Set III is higher than

Set II4. The frequency of collision between cockle shell /

calcium carbonate and H+ ion in Set III is higher thanSet II

5. The frequency of effective collision in Set III is higherthan Set II

111

1

1 5

TOTAL 20

Set II

Set III

Set I

V

Time / s

Masa / s

Volume of gas/ cm3

Isi padu gas /cm3

9

Question Answer Submark Question

10(a)(i) Dissolve ENON in water

1. Endothermic reaction2. Energy level diagram

Energy

Na+ + HCO3-

NaHCO3 + H2O

Dissolve soap powder in water

3. Exothermic reaction4. Energy level diagram

Energy

C₁₇H₃₅COONa + H2O

Na+ + C₁₇H₃₅COO-

11+1

11+1 6

ENON in water Soap powder in waterHeat absorb fromsurrounding

Heat release tosurrounding

Total energy content ofreactant is lower thantotal energy content ofproduct

Total energy content ofreactant is higher thantotal energy content ofproduct

Heat energy absorbduring bond breaking isgreater than heat energyrelease during bondformation

Heat energy releaseduring bond formation isgreater than heat energyabsorb during bondbreaking

∆H is positif ∆H is positif

1

1

1

1 4

10

(b) 1. Measure 200 cm3 of water and pour into a copper can.2. Record the initial temperature reading of the water.3. Weight and record the mass of labor gas X.4. Place the copper can on the tripod stand and labor gas

X under the tripod stand5. Light up the labor gas dand stir the water6. When the temperature increase by 300C, put off the

flame and record the highest temperature

7. DataMass of labor gas before combustion = p gMass of labor gas after combustion = q gMass of fuel used = (p-q) g = r g

Initial temperature = θ10C

Highest temperature = θ20C

Temperature change = (θ2 - θ1)0C = θ0C

8. Calculation

Heat release = 200 x c x θ J = Q J

Number of moles fuel in labor gas X = = n

∆H = - Jmol-1 // - 1000 kJmol-1

9. Repeat the experiment using labor gas Y to replacelabor gas X

10. Conclusion:Labor gas with the higher heat of combustion isbetter.

1111

11

1

1

1

1 10

TOTAL 20

TAMAT


1

MARKING SCHEME PAPER 3 CHEMISTRY JUJ 2015

QuestionNumber

Rubric Score

1(a) Able to state all the temperature accurately with correct unit and 1decimal place.

Sample answer:

Experiment IInitial temperature of the mixture : 28.0 oCSuhu awal campuran

Highest temperature of the mixture : 40.0 oCSuhu tertinggi campuran

Change in temperatre : 12.0 oCPerubahan suhu

Experiment IIInitial temperature of the mixture : 28.0 oCSuhu awal campuran

Highest temperature of the mixture : 41.0 oCSuhu tertinggi campuran

Change in temperatre : 13.0 oCPerubahan suhu

* ecf – Jika ada bacaan yang salah tetapi perubahan suhudikira dengan betulcth : 26o C

40oC14o C

3

Able to state all the temperature accurately (1 decimal placewithout unit// more/less than 1 decimal place// less accurately (any 4 accurate reading )

Sample answer:

2

Able to record at least 3 reading for every experiment correctly 1No response or wrong response 0


2

QuestionNumber

Rubric Score

1(b) Able to construct a table to record the initial temperature,highest temperature and change in temperature

1. Correct titles with unit2. Readings to 1 decimal place

Sample answer:



Experiment IIEksperimen II

Initial temperature / o CSuhu awal/ o C

28.0 28.0

Highest temperature of themixture / o CSuhu tertinggi campuran/ o C

40.0 41.0

Change in temperature / oCPerubahan suhu/ oC

12.0 13.0

No. Eksp// Nama asid(no 1,2 @ I, II @ formula)** Suhu awal dengan unit betul( oC ditulis pada ruang tajuk)

3

Able to construct a less accurate table that contains:1. Titles without unit2. Final temperature

Sample answer:



Experiment IIEksperimenII

Initial temperatureSuhu awal

28.0 28.0

Final temperatureSuhu akhir campuran

40.0 41.0

Change in temperaturePerubahan suhu

12.0 13.0

2

Able to construct a table with at least one title / reading// at least consist 2 vertical column and 2 horizontal row

1

No response or wrong response 0

3

QuestionNumber

Rubric Score

1© Able to state all the three variables correctlyBoleh menyatakan semua pemboleh ubah dengan betul

Sample answer:

Manipulated variable: Ethanoic acid, hydrochloric acid // type of acid//strong acid weak acid (a: formula)

Asid etanoik,asid hidroklorik// jenis asid//asidkuat,asid lemah(formula diterima)

Responding variable : Heat of neutralisation // temperature change /temperature increase

haba peneutralan// perubahan suhu/kenaikansuhu

Constant variable : volume and concentration of hydrochloricacid/ethanoic acid// volume and concentration of sodium

HydroxideIsipadu dan kepekatan asid hidroklorik/ asid

Etanoik// isipadu dan kepekatan natrium hidroksida

3

Able to state any two variables correctly 2Able to state any one variable correctly 1No response or wrong response 0

4

QuestionNumber

Rubric Score

1(d) Able to state the hypothesis acuratelyDapat memberikan hipótesis dengan tepat

1. Manipulated variablePemboleh ubah manipulasi

2. Responding variablePemboleh ubah bergerak balas

3. DirectionArah kesan

Sample answers:Cth jawapan :

1. HCl/strong acid produced higher heat ofneutralisation/(temperature change/temperature increase) thanethanoic acid/weak acid.// vice versaHCl /asid kuat menghasilkan haba peneutralan/(perubahansuhu/kenaikan suhu) yang > tinggi/rendah daripada asidetanoik/asid lemah// terbalik

2. Different type of acid produced different (heat ofneutralisation/ temperature change/temperature increase)

Jenis asid yang berlainan /berbeza menghasilkan( habapeneutralan/perubahan suhu/kenaikan suhu ) yangberbeza/berlainan

3

Able to give the hypothesis less accuratelyDapat memberikan hipótesis kurang tepat

NO COMPARISONtiada perbandingan

Sample answer:Cth jawapan:

1. Heat of neutralisation of hydrochloric and sodium hydroxide ishigher than heat of neutralisation of ethanoic acid and sodiumhydroxide.Haba peneutralan asid hidroklorik dengan natriumhidroksida adalah tinggi daripada haba peneutralan asidetanoik dengan natrium hidroksida

2. Type of acid affact heat of neutralisation/ temperaturechange/temperature increaseJenis asid mempengaruhi haba peneutralan /perubahansuhu/kenaikan suhu

3. Temperature increase of hydrochloric acid is higher thantemperatura increase of ethanoic acid

2

5

// heat of neutralisation of hydrochloric acid is higher(no comparison)Kenaikan suhu asid hidroklorik adalah lebih tinggi daripadakenaikan suhu asid etanoik//haba peneutralan asid HCladalah lebih tinggi (tiada perbandingan)

4. The strong the acid react the higher the heat of neutralizationSemakin kuat asid yang bertindak balas semakin tinggi habaPeneutralan

5. heat of neutralisation/ temperatura change of HCl is higherHaba peneutralan / perubahan suhu HCl > tinggi

6. HCl produced different heat of neutralisation from ethanoicacid (no direction)

HCl menghasilkan haba peneutralan yang berbeza daripadaasid etanoik(tiada aras kesan)

Able to state the idea of hypothesisDapat memberikan idea hipotesis

ACID/ TEMPERATURE CHANGEASID/PERUBAHAN SUHU

Sample answer:Cth jawapan

1. Heat of neutralisation is affect by type of acidHaba peneutralan dipengaruhi oleh jenis asid

2. Acid/ concentration of H+ produced heat of neutralisationAsid/kepekatan ion H+ menghasilkan haba peneutralan

3. The higher the temperature change (responding) the higher theheat of neutralisation (responding)semakin tinggi perubahan suhu(bergerakbalas) semakin tinggihaba peneutralan(bergerakbalas)

4. Heat of neutralisation of experiment II is higher than experimentI /oppositehaba peneutralan eksperimen II > tinggi daripada eksperimen I/ terbalik

5. The higher the concentration of acid the higher the heat ofneutralisation.Semakin pekat asid semakin tinggi haba peneutralan

6. The temperature increase in HCl is higherKenaikan suhu asid HCl adalah tinggi

1


6

QuestionNumber

Rubric Score

1(e) Able to state the operational definition of heat of neutralisation correctlyBoleh menyatakan difinisi secara operasi haba peneutralan dengantepatSample answer:

1. Heat reléase when 1 mol of wáter producedhaba yang dibebaskan apabila 1 mol air dihasilkan

2. Heat reléase when per mol of wáter producedhaba yang dibebaskan per mol air yang dihasilkan

3. Heat reléase is divided with 1 mole of wáter producedhaba yang dibebaskan dibahagi dengan 1 mol air yang dihasilkan

4. Heat reléase when is divided with number of mol of wáterhaba yang dibebaskan dibahagi dengan bil mol air

5. Heat reléase when 1 mol of H+ react with 1 mol of OH – to produce 1mole of wáterhaba yang dibebaskan apabila 1 mol ion H+ bertindak balas dengan1 mol ion OH− untuk menghasilkan 1 mol air pada keadaan piawai

a : H 2º

3

Able to state the operational definition heat of neutralisation of lessaccurately:Boleh memberi difinisi secara operasi bagi haba peneutralan dengan kurangtepatSample answer:

1. Heat change when 1 mole of wáter producedperubahan haba apabila 1 mol air di hasilkan

2. Heat change when 1 mole H+ react with 1 mole of OH- to produce 1mol of waterperubahan haba apabila 1 mol H+ bertindak balas dengan 1 mol OH -

untuk menghasilkan 1 mol air.

2

Able to give an idea of operational definitionBoleh memberi idea bagi difinisi secara operasi

Sample answer1. Heat release/heat change when acid react with alkali to produce

salt and water (a: 1 mole of water…score 2)haba yang terbebas/perubahan haba apabila suatu asid bertindakbalas dengan suatu alkali untuk menghasilkan garam dan air ( kalauada 1 mol air -skor 2)

2. Heat change/temperature change when acid react with alkali(neutralization reaction)perubahan haba/perubahan suhu apabila asid bertindak balas denganalkali/(tb peneutralan)

3. Heat change/temperature change when wáter producedperubahan haba/perubahan suhu apabila air dihasilkan

1


7

QuestionNumber

Rubric Score

1(f) Able to calculate theBoleh mengira:

(i) number of mole25 X 2.0 = 0.05 mole1000

(ii) Heat release

∆H = mcƟ= 50 x 4.2 x 13= 2 730 kJ

(iii) Heat of neutralisation

= 27300.05

= 54 600 Jmol-1 / 54.6 kJmol-1

3

Able to calculate any two correctly 2

Able to calculate any one correctly 1No response or wrong response 0

QuestionNumber

Rubric Score

1(g) Able to state any three observations and inferences accuratelyDapat menyatakan mana-mana tiga pemerhatian dan inferens denganbetul

Sample answer:

ExperimentsEksperimen

OservationsPemerhatian

InferencesInferens

I 1. Polystyrene cupbecome hotcawan polistirenamenjadi panas

2 Termometer readingincrease //mercurylevel increasebacaan termometermeningkat // arasmekuri meningkat

Exothermicreaction/heat release

2. Exothermicreaction/heat release

6

8

3.Colourless andwarmer final mixtureis obtainCampuran tanpa

warna dan suamdiperolehi

4. Punjent smell ethanoicacid disappearbau sengit asid etanoik

/ bau cuka hilangr: sour (taste)

Exothermicreaction//heat release// Potassium ethanoateform //potassiumchloride // salt solutionformed

Neutralization occured// all acid/H+ reactcompletely //salt andwater formed

Able to state at least 5 observations and inferences correctly 5Able to give at least 4 of observation and inferences correctly 4Able to give at least 3 of observation and inferences correctly 3Able to give at least 2 of observation and inferences correctly 2Able to give at least 1 of observation and inferences correctly 1No response or wrong response 0

QuestionNumber

Rubric Score

1(h) Able to predict the volume of sulphuric acid accuratelyBoleh meramalkan isipadu asid sulfurik dengan tepat

Answer : 12.5 cm33

Able to predict the volume of sulphuric acid less accuratelyBoleh meramalkan isipadu asid sulfurik dengan kurang tepat

Without unitAnswer : 12.5

2

Able to give an ideaAny value of volume (less than 25 cm3) 1


9

QuestionNumber

Rubric Score

1(i) Able to answer and explain accurately

Answer :1. temperature decrease to room temperature / 28oC

Suhu berkurang ke suhu bilik/ 28oC// Any value of temperature /less than 40oC/28oC to 40oC

2. Because all heat is loss to the surroundingSebab semua haba hilang ke persekitaran

3

Able to state any one answer / explainBoleh menyatakan mana-mana satu jawapan / penerangan 2

Able to give an ideaSample answer:Any value of temperature less than 28oC

1


QuestionNumber

Rubric Score

1(j) Able to classify all the reaction correctlySample answer:

Exothermic reaction Endothemic reactionNuclear fissionPembelahan nuklear

PhotosynthesisFotosintisis

Rusting of ironPengkaratan besi

Melting of ice cubesPeleburan ketulan air batu

CombustionPembakaran

Water evaporationPenyejatan air

3

Able to classify at least 4 substance correctly 2Able to classify at least 2 substance correctly/ reverse 1Able to classify 1 substance correctlyNo response or wrong response

0

10

QuestionNumber

Rubric Score

2(a) Able to state the aim of the experiment correctlyDapat menyatakan tujuan eksperimen dengan betul

Sample answer:To ( investigate/ study) / (compare and contrast) theeffectiveness of cleansing agent X and cleansing agent Y inhard water.

Untuk (menyiasat/mengkaji)/(membanding dan membezakan)keberkesanan tindakan pencucian agen X dan tindakanpencucian agent Y dalam air liat

3

Able to state aim less accuratelyDapat menyatakan tujuan dengan kurang tepat

Sample answer:

To ( investigate/ study) / (compare and contrast) the effectiveness ofcleansing agent X and cleansing agent Y . (No hard water)

Untuk (menyiasat/mengkaji) /(mmembanding dan membezakan)keberkesanan tindakan pencucian agen X dan tindakan pencucianagen Y

2

Able to give an idea of aimDapat memberikan idea tujuan

Sample answer:cleansing agent X / cleansing agent Y/cleansing action.Tindakan pencucian agen X/tindakan pencucian agen Y /tindakanpencucian

1

No response or wrong responseTiada jawapan/jawapan salah

0

11

QuestionNumber

Rubric Score

2(b) Able to state the three variables accuratelyDapat menyatakan tiga pembolehubah dengan tepat

Manipulated variable : Type of cleansing agents,// Cleansing agent X

and cleansing agent Y,pembolehubah dimanipulasi: jenis agen pencucian//agen

pencucian X dan agenpencucian Y

Responding variable : Effectiveness of cleansing agents// cloth is clean/(not dirty)

Pembolehubah bergerak balas : keberkesanan agenpencucian

// baju/kain bersih/tidak kotor

Constant variables : Hard water, volume of hard water,mass of cleansing agents.

Pembolehubah dimalarkan : air liat/isipadu air liat/jisimagen pencucian

3

Able to state any two variables correctlyDapat menyatakan mana-mana dua pembolehubah dengan betul 2

Able to state any one variables correctlyDapat menyatakan mana-mana satu pembolehubah dengan betul 1

No response or wrong responseTiada jawapan atau jawapan salah

0

12

QuestionNumber

Rubric Score

2(c) Able to state the relationship between the manipulatedvariable and the responding variable with directionDapat menyatakan perhubungan antara pembolehubahdimanipulasi dan pembolehubah bergerak balas denganarah

Sample answer:Cleansing agent X can clean the cloth.Cleansing agent Y cannot clean the cloth /form scum

Agen pencucian X boleh membersihkan kain/baju.Agen pencucian Y tidak boleh membersihkankain/baju/membentuk kekat

3

Able to state the relationship less accurately between the manipulatedvariable and the responding variableDapat menyatakan perhubungan antara pembolehubah dimanipuasidengan pembolehubah bergerak balas kurang tepat

Sample answer:Different cleansing agent have different effectiveness in cleansingactionKesan pembersihan tindakan agen pencucian adalah berbeza

2

Able to state the idea of hypothesisDapat menyatakan idea tentang hipotesis

Sample answer:Cleansing agent X /Cleansing agent Y/clean cloth/dirty clothAgen pencucian X/agen pencucian Y/kain bersih/kain kotor

1

No response or wrong responseTiada jawapan atau jawapan salah

0

13

QuestionNumber

Rubric Score

2(d)Able to give complete list of substances and apparatusDapat memberikan senarai bahan dan radas

Sample answer:

Materials : Cleansing agent X ,Cleansing agent Y, hardWater, pieces of cloth with oily stain / dirty cloths

Bahan : Tindakan pencucian X,tindakan pencucian Y,airliat,sehelai baju/kain yang mempunyai kesanminyak/kain kotor

, [4 materials]

Apparatus: Basins/250cm3 beakers, 100 cm3 measuringcylinder, glass rod, electronic balance

Alat radas : besen/250 cm3 bikar , 100cm silinder penyukat,rodkaca,penimbang elektronik

[3 apparatus]

3

Able to give all 4 materials and at least two apparatusDapat memberi semua 4 bahan dan paling kurang dua radas

Sample answer:Materials: : Cleansing agent X ,Cleansing agent Y, hard

water, pieces of cloths with oily stain / dirty clothsBahan : agen pencucian X,bahan pencucian Y ,air liat, sehelai

baju/kain dengan kesan minyak//baju/kain kotorApparatus:

Any container

Alat radas :Sebarang bekas

2

Able to give at least two materials and any containerDapat memberi paling kurang 2 bahan dan sebarang bekas

1

No response or wrong responseTiada jawapan atau jawapan salah 0

14

QuestionNumber

Rubric Score

2(e) Able to list all the steps correctlyDapat menyenaraikan semua langkah dengan betul

Sample answer 1:1. Label 2 beakers as X and Y2. Measure [100-200 cm3] of hard water and pour into

beaker X and beaker Y.3. [3-5]g of cleansing agent X is put/added/pour into beaker labeled X.4. [3-5]g of cleansing agent Y is put/added/pour into beaker labeled Y5. Stir the beakers using glass rod until no changes can be observed6. Place/put a piece of cloth with oily stain into each beaker.7. Record all the observation.

1. Labelkan dua bikar, X dan Y2. Ukur [100-200cm] air liat dan tung ke dalam bikar X dan bikar Y3. Tambah/letak/tuang [3-5]g agen pencucian X ke dalam bikar X4. Tambah/letak/tuang [3-5]g agen pencucian X ke dalam bikar Y5. Kacau bikar menggunakan rod kaca sehingga tiada perubahan dapat

diperhatikan6. Letak sehelai kain/baju dengan kesan minyak ke dalam bikar.7. Rekod segala pemerhatian

Or / atauSample 21. Measure [100-200 cm3] of hard water and pour into a beaker .2. [3-5]g of cleansing agent X is put/added/pour into beaker .3. Stir the beakers using glass rod until no changes can be observed4. Place/put a piece of cloth with oily stain into each beaker.5. Record all the observation6. Repeat step 1-5 using cleansing agent Y.

1. Ukur [100-200 cm] air liat dan tuang ke dalam bikar2. Tambah/letak/tuang [3-5]g [3-5]g agen pencucian ke dalam bikar3. Kacau bikar menggunakan rod kaca sehingga tiada perubahan

diperhatikan4. Letak sehelai kain/baju dengan kesan minyak ke dalam bikar5. Rekod segala pemerhatian6. Ulang langkah 1-5 menggunakan agen pencucian Y

3

Sample 1Able to list down steps 2, 3,4, 6Dapat menyenaraikan langkah 2,3,4,6Sample 2Able to list down steps 1, 2, 4Dapat menyenaraikan langkah 1,2,4// All steps mention but without specification in steps 2 and 3//semua langkahdinyatakan tetapi tidak secara khusus bagi langkah 2 dan 3

2

Able to give an idea in step 2 and 3/ 4(sample 1) 2 and 4 (sample 2)Dapat memberikan idea pada langkah 2 dan 3/(sampel 1),2 dan 4(sampel 2) 1

No response or wrong responseTiada jawapan atau jawapan salah 0

15

QuestionNumber

Rubric Score

2(f) Able to exhibit the tabulation of data that includes thefollowing informationDapat mempamerkan penjadualan data dengan maklumatberikut :

1. Heading for the manipulated variable and respondingVariable

Tajuk bagi pembolehubah dimanipulasikan dan bergerakbalas

2. Cleansing agent X ,Cleansing agent YAgen pencucian X , agen pencucian Y

Sample answer:Type of cleansing agentJenis agen pencucian


Cleansing agent XCleansing agent Y

2

Able to exhibit the tabulation of data that includes thefollowing informationDapat mempamerkan penjadualan data dengan maklumatberikut :

1. heading for manipulated/responding variablestajuk bagi pembolehubah dimanipulasi/pembolehubah bergerak balas

2. Cleansing agent X /Cleansing agent YAgen pencucian X/agen pencucian Y

Sample answer:ObservationPemerhatian

Cleansing agent X ,Cleansing agent Y

Or/atauType of cleansing agents

Jenis agen pencucianCleansing agent X ,Cleansing agent Y

Or/atau

1

16

Type of cleansing agentsJenis agen pencucian

Cleansing agent X ,

Cleansing agent X ,

No response or wrong responseTiada jawapan atau salah jawapan

0


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