2010 chemistry qa perak(gerak+gempur)

8/13/2019 2010 Chemistry Qa Perak(Gerak+Gempur)

1/67

Gerak Gempur SPM Chemistry paper 1

1 Which of the following substances is made up of atoms?Antara berikut, bahan yang manakah terdiri daripada atom?

A

B

C

D

Iron

Ferum

Oxygen gasGas oksigen

Naphthalene

Naftalena

Sodium chlorideNatrium klorida

2 The equation below shows the reaction between magnesium and hydrochloric acid,Persamaan di bawah menunjukkan tindakbalas antara magnesium dan asid hidroklorik

Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g)

Which of the following statements is true?

Antara pernyataan berikut, yang manakah benar?

[Relative atomic mass of H = 1. Mg = 24, Cl = 35.5][Jisim atom relatif H = 1, Mg = 24, Cl = 35.5]

A

B

C

D

1 g magnesium react with 2 g hydrochloric acid to produce 1 g magnesium chloride and

1 g hydrogen gas1 g magnesium bertindak balas dengan 2 g asid hidroklorik menghasilkan 1 gmagnesium klorida dan 1 g gas hidrogen

24 g magnesium react with 36.5 g hydrochloric acid to produce 95 g magnesium chlorideand 2 g hydrogen gas24 g magnesium bertindak balas dengan 36.5 g asid hidroklorik menghasilkan 95 gmagnesium klorida dan 2 g gas hidrogen

1 mol magnesium react with 2 mol hydrochloric acid to produce 1 mol magnesiumchloride and 1 mol hydrogen gas

1 mol magnesium bertindak balas dengan 2 mol asid hidroklorik menghasilkan 1 mol

magnesium klorida dan 1 mol gas hidrogen

1 magnesium atom reacts with 2 hydrochloric acid molecule to produce 1 magnesiumchloride molecule and 1 hydrogen gas molecule

1 atom magnesium bertindak balas dengan 2 molekul asid hidroklorik menghasilkan 1molekul magnesium klorida dan 1 molekul gas hidrogen

http://chngtuition.blogspot.com


2/67


2

3 Which of the following chemists arranged the elements in order of increasing atomic mass in ThePeriodic Table ?

Antara ahli kimia berikut, yang manakah menyusun unsur-unsur dalam Jadual Berkalaberdasarkan pertambahan jisim atom?

A

B

C

D

Dmitri Mendeleev

Johann Dobereiner

John Newlands

Henry Moseley

4 Element J has 11 electrons

Unsur J mempunyai 11 elektron.

Which of the following electron arrangements represent ion J?Antara susunan elektron berikut, yang manakah mewakili ion J?

5 The ions that are present in copper(II) sulphate solution areIon-ion yang wujud dalam larutan kuprum(II) sulfat ialah

A

B

C

Cu2+,SO42-

Cu2+, SO42-, H+

Cu2+, SO42-, OH-

A

D

C

B



3/67


3

D Cu2+, SO4

2-, H+, OH-

6 Which of the following is a strong acid?Antara yang berikut, yang manakah asid kuat?

A

B

C

D

Alkyl sulphonic acid

Asid Alkil sulfonik

Ethanoic acid

Asid etanoik

Palmitic acidAsid palmitik

Nitric acidAsid nitrik

7 Which of the following is a salt ?Antara berikut, yang manakah merupakan garam?

A

B

C

D

Lead (II) oxidePlumbum(II) oksida

Barium hydroxideBarium hidroksida

Aluminium nitrateAluminium nitrat

Hydrogen sulphate

Hidrogen sulfat

8 Which of the following is true about manufactured substance in industry and its uses?Antara yang berikut,,yang manakah benar tentang bahan buatan dalam industri dengan

kegunaannya?

Manufactured substance in industry

Bahan Buatan I ndustri

Uses

Kegunaan

A PolythenePolitena

LensesKanta

B Lead glass

Kaca Plumbum

Mirror

Cermin

C Photochromic glass

Kaca fotokromik

Optical lenses

Kanta cermin mata

D Plastic reinforced with glassPlastik yang diperkukuhkan dengan kaca

Test tubeTabung uji



4/67


4

9 Which of the following statements best explain the decrease in rate of decomposition ofhydrogen peroxide with time?

Antara pernyataan berikut,yang manakah menerangkan pengurangan kadar penguraianhidrogen peroksida dengan masa ?

A

B

C

D

Product of reaction decreasesHasil tindak balas berkurang

Temperature of hydrogen peroxide decreasesSuhu hidrogen peroksida berkurang

Volume of hydrogen peroxide decreases

Isipadu hidrogen peroksida berkurang

Concentration of hydrogen peroxide decreasesKepekatan hidrogen peroksida berkurang

10 Which of the following chemicals is used to keep latex in its liquid state?Antara bahan kimia berikut, yang manakah digunakan untuk mengekalkan lateks dalam keadaan

cecair?

A

B

C

D

Aqueous ammoniaAmmonia akueous

Ethanoic acid

Asid ethanoik

MethanolMetanol

WaterAir



5/67


5

12 What is the meaning of heat of reaction?Apakah maksud haba tindak balas?

A The energy needed to break the chemical bondTenaga yang diperlukan untuk memecahkan ikatan kimia

B The energy needed to start a reactionTenaga yang diperlukan untuk memulakan tindak balas

C The energy involved when change of state of matter occurs

Tenaga yang dibebaskan apabila perubahan keadaan bahan berlaku

D The change in the energy contained in the products and in the reactantsPerubahan kandungan tenaga dalam hasil tindak balas dan bahan tindak balas

11 Diagram 1 shows the set up of apparatus for a chemical reaction.

Rajah 1 menunjukkan susunan radas bagi satu tindak balas kimia.

DIAGRAM 1RAJAH 1

Which of the following statements is true for the reaction?

Antara pernyataan berikut, yang manakah benar mengenai tindak balas itu?

A

B

C

D

Iron is reducedFerum diturunkan

Iron is an oxidising agentFerum adalah agen pengoksidaan

Magnesium releases electronMagnesium membebaskan elektron

The oxidation number of magnesium decreases

Nombor pengoksidaan magnesium berkurang

Magnesium strip

Kepingan magnesium

Agar solution

Larutan agar-agar

Iron strip

Kepingan ferum



6/67


6

13 The body of an aeroplane is made up of alloy X.Badan sebuah kapalterbang dibina dari sejenis aloi X.

What is the alloy X?Apakah aloi X itu?

A

B

C

D

PewterPiuter

BrassLoyang

BronzeGangsa

DuraluminDuralumin

14 Which of the following is true about the charges of an electron, a neutron and a proton?Antara yang berikut, yang manakah benar tentang cas-cas bagi elektron, neutron dan proton?

A

B

C

D

Electron

Elektron

Neutron

Neutron

Proton

Proton

NegativeNegatif

PositivePositif

NeutralNeutral

PositivePositif

NeutralNeutral

NegativeNegatif

PositivePositif

NegativeNegatif

NeutralNeutral

NegativeNegatif NeutralNeutral PositivePositif

15 Which of the following pair of compounds and formulae is correct?Antara berikut, yang manakah pasangan sebatian dan fomulanya betul?

A

B

C

D

Compound Formula

Sebatian Formula

Sodium sulphate NaSO4

Natrium sulfat

Copper(II) oxide Cu2OKuprum(II) oksida

Iron(III) chloride FeCl3Ferum(III) klorida

Zinc nitrate Zn(NO2)3Zink nitrat



7/67


7

16 Astatine is below iodine in Group 17 of Periodic Table.

Astatine terletak di bawah iodin dalam Kumpulan17 Jadual Berkala.

Which of the following statements is true for astatine?Antara pernyataan berikut, yang manakah benar tentang astatine?

A

B

C

D

Form basic oxideMembentuk oksida alkali

Exists as monoatomWujud sebagai monoatom

Solid at room temperature

Pepejal pada suhu bilik

More electronegativity than iodineLebih elektronegatif daripada iodin

17 The diagram 2 shows the electron arrangement of a molecule of water ,H2O

Rajah 2 menunjukkan susunan elektron bagi molekul air ,H2O

DIAGRAM 2RAJAH 2

Which of the following statements is true about the molecule?Antara pernyataan berikut, yang manakah benar tentang molekul itu ?

A

B

C

D

The compound has high melting pointSebatian mempunyai takat lebur yang tinggi

Oxygen atom ,O has four pairs of electrons to share

Atom oksigen, O mempunyai empat pasang elektron untuk di kongsi

The bonding between molecules of water, H2O is of Van der Waals forcesIkatan antara molekul air,H2Oialah daya Van der Waals

Each oxygen atom , O receives two electrons to form an oxide ionSetiap atom oksigen, O menerima dua elektron untuk membentuk satu ion oksida.

H O H



8/67


8

18 The diagram 3 shows the set up of the apparatus of a simple chemical cell.The reading on the voltmeter is 0.5 V.

Rajah 3 menunjukkan satu radas bagi satu sel kimia yang ringkas.Bacaan pada voltmeter ialah 0.5 V.

DIAGRAM 3

RAJAH 3

Which of the following will give the biggest increment in the reading on the voltmeter?Antara berikut, yang manakah akan meningkatkan bacaan paling tinggi pada voltmeter?

A

B

C

D

Increase the volume of iron(II) sulphate solutionTambahkan isipadu ferum(II) sulfat

Substitute the iron plate with a silver plate

Gantikan kepingan ferum dengan kepingan argentum

Use a more dilute iron(II) sulphate solution

Gunakan larutan ferum(II) sulfat yang lebih cair

Substitute the zink plate with an aluminium plateGantikan kepingan zink dengan kepingan aluminium

19 Which of the following is true about alloy and its major component?

Antara berikut yang manakah benar tentang aloi dan juzuk utamanya

Alloy

Aloi

Major component

Komponen utama

A DuraluminDuralumin

MagnesiumMagnesium

B SteelKeluli

TinStanum

C BronzeGangsa

CopperKuprum

D PewterPiuter

ZincZink

Iron(II) sulphate solution

Larutan ferum(II) sulfat

Iron plateKepingan

erum

Zinc plateKepingan zink

0.5V



9/67


9

20 Which of the following solutions contain the same number of hydrogen ion, H+?

Antara larutan berikut, yang manakah mengandungi bilangan ion hidrogen, H+ yang sama?

[Avogadro number = 6.02 x 1023

mol-1

][Nombor Avogadro = 6.02 x 1023mol-1]

I

II

III

IV

A

B

C

D

50 cm3of 1.0 mol dm-3of nitric acid50 cm3of 1.0 mol dm-3 acid nitrik

100 cm3of 0.5 mol dm-3of hydrochloric acid100 cm3of 0.5 mol dm-3acid hidroklorik

25 cm3of 1.0 mol dm-3of sulphuric acid25 cm

3of 1.0 mol dm

-3 acid sulfurik

200 cm3of 0.5 mol dm-3of ethanoic acid

200 cm3of 0.5 mol dm-3 acid etanoik

I and III onlyI dan III sahaja

II and IV onlyII dan IV sahaja

I, II and III onlyI, II dan III sahaja

II, III and IV onlyII, III dan IV sahajay

21 Which of the following explains the meaning of effective collision?

Antara pernyataan berikut, yang manakah menjelaskan maksud perlanggaran berkesan?

A

B

C

D

The collision that causes a reaction

Perlanggaran yang menghasilkan tindak balas

The collision that has a low energyPerlanggaran yang mempunyai tenaga yang rendah

The collision which takes place before a reactionPerlanggaran yang berlaku sebelum sesuatu tindak balas

The collision where its energy is less than the activation energy

Perlanggaran yang tenaganya kurang daripada tenaga pengaktifan



10/67


10

22 Diagram 4 shows the set of apparatus of an experiment.Rajah 4 menunjukkan susunan radas bagi satu eksperimen.

DIAGRAM 4RAJAH 4

Which of the following can be used to differentiate these solutions?Antara yang berikut, yang manakah boleh digunakan untuk membezakan larutan-larutantersebut ?

A

B

C

D

Ammonia solutionLarutan ammonia

Barium nitrate solutionLarutan barium nitrat

Silver nitrate solutionLarutan argentum nitrat

Sodium hydroxide solutionLarutan natrium hidroksida

23 Diagram 5 represents the structural formula of a carbon compoundRajah 5 menunjukkan formula struktur satu sebatian karbon

DIAGRAM 5RAJAH 5

Name of the above carbon compound isNama sebatian karbon di atas ialah

A

B

C

D

Ethyl ethanoateEtil etanoat

Propil ethanoatePropil etanoat

Ethyl propanoateEtil propanoat

Diethyl methanoateDietil etanoat

H H O H H| | || | |

HCC COCCH| | | |

H H H H

Aluminium chloride solution

Larutan Aluminium klorida

Zinc chloride solution

Larutan zink klorida



11/67


11

24 Which of the following reactions shows that tin is a reducing agent?

Antara tindak balas kimia berikut, yang manakah menunjukkan stanum sebagai agenpenurunan?

I

II

III

IV

A

B

C

D

Reaction of tin with silver oxide

Tindak balas stanum dengan argentum oksida

Reaction of tin with lead(II) nitrate solutionTindak balas stanum dengan larutan Plumbum(II) nitrat

Electrolysis of tin(II) nitrate solution using tin electrodes

Elektrolisis larutan stanum(II) nitrat dengan menggunakan elektrod stanum

Chemical cell with tin and zinc electrodes in sodium sulphate solution.Sel Kimia yang menggunakan elektrod stanum dan zink dalam larutan natrium sulfat.

I and II only

I dan II sahaja

II and IV only

II dan IV sahaja

I, II and III only

I, II dan III sahaja

I, III and IV onlyI, III dan IV sahaja

25 The following chemical equation shows the reaction of the formation of lead (II) sulphateprecipitate.Persamaan kimia berikut menunjukkan tindak balas pembentukan mendakan plumbum (II) sulfat.

Pb2+ (ak) + SO42-(ak) PbSO4 (p) H = - 42 kJ mol

-1

Which of the following is true about the reaction?Antara yang berikut, yang manakah benar tentang tindak balas itu?

Heat change

Perubahan haba

Type of reaction

Jenis tindak balas

A Heat is released

Haba dibebaskan

Endothermic

EndotermikB Heat is absorbed

Haba diserapExothermicEksotermik

C Heat is releasedHaba dibebaskan

ExothermicEksotermik

D Heat is absorbedHaba diserap

EndothermicEndotermik



12/67


12

26 Which of the following molecules is soap?Antara molekul berikut, yang manakah merupakan sabun?

A

B

C

D

CH3(CH2)14COOH

CH3(CH2)2COONa

CH3(CH2)14COONa

CH3(CH2)14COOCH3

27 The diagram 6 shows the cooling curve for a sample of a pure substance XRajah 6 menunjukkan lengkuk penyejukan bagi satu contoh bahan X yang tulin.

DIAGRAM 6RAJAH 6

Which of the following statements is true about the arrangement of particles at time t?

Antara berikut, yang manakah pernyataan yang benar tentang susunan zarah-zarah padamasa t?

A

B

C

D

All the molecules move freelySemua zarah bergerak bebas

All the molecules only vibrate and rotate at their fixed positionSemua zarah hanya bergetar dan berputar pada kedudukan yang tetap

Some of the molecules move from one point to another and the others move randomly

Sebahagian zarah bergerak dari satu tempat ke tempat yang lain dan yang lainnyabergerak bebas

Some of the molecules vibrate and rotate at their fixed positions and the others move

from one point to anotherSebahagian zarah bergetar dan berputar pada kedudukan yang tetap dan yang lainnya

bergerak dari satu tempat ke tempat yang lain

t

Temperature/oC

Time/s



13/67


13

28 Diagram 7 shows the molecular formulae of two compounds, X and Y

Rajah 7 menunjukkan formula molekul bagi dua sebatian, X dan Y.

Compound X Compound YSebatian X Sebatian Y

DIAGRAM 7RAJAH 7

Which of the following statements are similar for compound X and Y?Antara pernyataan berikut, yang manakah sama bagi sebatian X dan Y?

A

B

C

D

The empirical formula

Formula empirik

Reaction with bromine waterBertindak balas dengan air bromine

Hydration to produce an alcoholPenghidratan menghasilkan suatu alkohol

Complete combustion in oxygen to produce water and carbon dioxide gasPembakaran sempurna dalam oksigen menghasilkan air dan gas karbon dioksida

29 Table 1 shows the proton number of elements W,X,Y and Z.

The letters used are not the actual symbol of the elements.

Jadual 1 menunjukkan nombor proton bagi unsur-unsur W,X,Y ,dan Z.Huruf yang digunakan bukan simbol sebenar unsur itu.

TABLE 1

JADUAL 1

Which of the following shows the ascending order of the atomic size of the elements?Antara ynag berikut yang manakah menunjukkan susunan menaik saiz atom bagi unsur-unsuritu?

Element

Unsur

Proton number

Nombor proton

W

XY

Z

11

1317

19

A

B

C

D

W,X,Y,ZZ,W,X,YY,X,W,ZZ,Y,X,W

C2H6 C5H10



14/67


14

30 Which of the following is true about covalent compound?

Antara berikut, yang manakah benar tentang sebatian kovalen?

A

B

C

D

Conduct electricity in molten or aqueous stateMengalir elektrik dalam keadaan lebur atau akueus

Low melting pointTakat lebur rendah

Soluble in waterLarut dalam air

Not volatile

Tidak meruap

31 Diagram 8 shows a set up of chemical cell using a pair of zinc and copper as electrodes.

Rajah 8 menunjukkan susunan radas sel kimia menggunakan pasangan elektrod zink dankuprum.

DIAGRAM 8RAJAH 8

The blue copper(II) sulphate solution turns pale.Warna biru larutan kuprum(II) sulfat luntur

Which of the following explains the observation?Antara pernyataan berikut yang manakah menerangkan pemerhatian itu?

A

B

C

D

Zinc atom ionizesAtom zink mengion

Copper atom ionizes

Atom kuprum mengion

Sulphate ion is dischargedIon sulfat dinyahscas

Copper(II) ion is dischargedIon kuprum(II) dinyahcas

Copper(II) sulphate solution

Larutan kuprum(II) sulfat

ZincZinkCopper

kuprum



15/67


15

32

Which of the following explains the above statement?Antara berikut, yang manakah menerangkan pernyataan di atas?

A

B

C

D

Hydrochloric acid is a weak acid while ethanoic acid is a strong acidAsid hidroklorik ialah asid lemah sementara asid etanoik ialah asid kuat

Hydrochloric acid dissociates partially while ethanoic acid dissociates completely in

waterAsid hidroklorik bercerai separa sementara asid etanoik bercerai sempurna di dalam

air

The number of hydrogen atom in hydrochloric acid is smaller than in ethanoic acidBilangan atom hidrogen di dalam asid hidroklorik lebih kecil berbanding di dalam asidetanoik

The concentration of hydrogen ion in hydrochloric acid is higher than in ethanoic acidKepekatan ion hidrogen di dalam asid hidroklorik adalah lebih tinggi berbanding di

dalam asid etanoik

33 The following equation shows the preparation of salt R.Persamaan berikut menunjukkan penyediaan garam R

Solution P + Solution Q Solid R + Solution S

Larutan P + Larutan Q PepejalR + Larutan S

Which of the following set represents compound P,Q,R and S?Antara set berikut, yang manakah merupakan sebatian P,Q,R dan S?

P Q R S

I Pb NaBr PbBr2 NaII Ca(NO)3 K2SO4 CaSO4 KNO3III AgNO3 NaCl AgCl NaNO3IV NH4OH HCl NH4Cl H2O

A I and II only

I dan II sahaja

B I and IV onlyI dan IV sahaja

C II and III onlyII and III sahaja

D III and IV onlyIII and IV sahaja

The pH value of 0.1 mol dm-3hydrochloric acid,HCl is smaller thanthe pH value of 0.1 mol dm-3ethanoic acid, CH3COOHNilai pH bagi 0.1 mol dm-3 asid hidroklorik, HCl adalah lebih kecil berbanding

dengan nilai pH bagi 0.1 mol dm-3asid etanoik, CH3COOH



16/67


16

34 The manufacturing of sulfuric acid involves several reactions.

Pembuatan asid sulfurik melibatkan beberapa tindak balas.

Which of the following equations represents the sulfuric acid reaction that uses a catalyst?Antara persamaan berikut, yang manakah mewakili tindak balas asid sulfurik yang

menggunakan mangkin?

A

B

C

D

S + O2 SO2

2SO2 + O2 2SO3

SO3 + H2SO4 H2S2O7

H2S2O7 + H2 O 2H2SO4

35 Diagram 9 shows the graph of volume of oxygen gas against time . Curve P is obtained from an

experiment of the decomposition of 25 cm3of 0.1 mol dm-3hydrogen peroxide solution.Rajah 9 menunjukkan graf isipadu gas oksigen melawan masa. Lengkung P diperolehi daripadatindak balas penguraian 25 cm3larutan hidrogen peroksida 0.2 mol dm-3.

DIAGRAM 9RAJAH 9

Which of the following solutions will produce curve Q?Antara larutan berikut, yang manakah akan menghasilkan lengkung Q?

A

B

C

D

25 cm3hydrogen peroxide 0.15 mol dm-3

25 cm3hydrogen peroxide 0.15 mol dm

-3




15 cm3hydrogen peroxide 0.15 mol dm

-3



P

Q

Time/sMasa/s

Volume of O2gas/cm3

Isipadu gas O2/cm3



17/67


17

36 The equation below shows the chemical equation of the combustion of ethanol in excess oxygen

Persamaan di bawah menunjukkan persamaan kimia bagi pembakaran etanol dalam oksigenberlebihan

2C2H5OH + 7O2 4CO2 + 6H2O

What is the volume of carbon dioxide gas released when 9.20 g ethanol reacts completely?Berapakah isi padu gas karbon dioksida terbebas apabila 9.2 g etanol bertindak balas lengkap?

[Relative atomic mass of H = 1, C = 12, O = 16, 1 mol of gas occupies 24 dm3at roomcondition]

[Jisim atom relatif H = 1, C = 12, O = 16, 1 mol of gas memenuhi 24 dm3pada keadaan bilik]

A

B

C

D

4.8 cm3

9.6 cm3

96.0 cm39600 cm3

37 Diagram 10 shows the set up of the apparatus to study the redox reaction .Rajah 10 menunjukkan susunan radas untuk mengkaji tindak balas redoks.

DIAGRAM 10

RAJAH 10Carbon X is a negative terminal.

Karbon X merupakan terminal negatif.

Which of the following are solution X and solution Y?Antara berikut, yang manakah merupakan larutan X dan larutan Y?

Solution X

Larutan X

Solution Y

Larutan Y

A Iron(II) sulphateFerum(II) sulfat

Bromine waterAir bromin

B Iron(III) sulphateFerum(III) sulfat

Potassium bromideKalium bomida

C Acidified potassium dicromate(VI)Kalium dikromat(VI) berasid

Potassium chlorideKalium klorida

D Acidified potassium manganat(VII)Kalium manganat(VII) berasid

Iron(II) sulphateFerum(II) sulfat

Carbon YKarbon Y

Porous potPasu telap

Solution X

Larutan X

Carbon X

Karbon X

Solution Y

Larutan Y



18/67


18

38 The reaction between 25.00 cm3of hydrochloric acid and 25.00 cm3of sodium hydroxide

solution releases the heat of 2100 J.[Specific heat capacity of a solution = 4.2 J g

-1 oC

-1

Assume that 1 cm 3of a solution is equal to 1 g of the solution ]Tindak balas antara 25.00 cm3 asid hidroklorik dan 25.00 cm3larutan natrium hidroksida

membebaskan haba sebanyak 2100 J.[Muatan haba tentu larutan = 4.2 J g-1 oC -1

Anggap 1 cm3larutan sama dengan 1 g larutan ]

What is the temperature change of the mixture ?Berapakah perubahan suhu campuran itu?

A

B

C

D

1OC

2OC

10 OC

20 OC

39 Which of the following is true about soap or detergent ?Antara yang berikut, yang manakah benar tentang sabun atau detergen ?

A

B

C

D

Soap forms scum in soft waterSabun membentuk kekat dalam air lembut

Detergent forms scum in hard waterDetergen membentuk kekat di dalam air liat

The presence of magnesium ions in detergent forms scumKehadiran ion magnesium di dalam detergen membentuk kekat

Scum decreases the effectiveness of the cleansing action of a soapKekat mengurangkan keberkesanan tindakan pencucian sabun

40 Bromine-79 has 44 neutrons.

Bromin-79 mempunyai 44 neutron

Which of the following symbols represent the bromine atom?Antara simbol berikut, yang manakah mewakili atom bromin?

A

B

C

D

79

35Br

44Br

35

79

44Br

79

35Br



19/67


19

41

What is the empirical formula of metal oxide J?Apakah formula empirik bagi oksida logam J?

[Relative atomic mass of J = 24, O = 16 ][Jisim atom relatif: J = 24, O = 16 ]

A

B

C

D

JOJO2J2OJ2O2

42 In the Periodic Table, element X is in group 1 and element Y is in group 17

The letters used are not the actual symbol of the elements.Dalam Jadual Berkala Unsur, unsur X berada dalam kumpulan I dan unsur Y berada dalam

kumpulan 17.Huruf yang digunakan bukan simbol sebenar unsur itu.

Which of the following chemical equation is true for the reaction between element X and elementY?

Antara persamaan kimia berikut, yang manakah benar bagi tindak balas antara unsur X dan

unsur Y?

A

B

C

D

2X + Y2 2XY

X + Y2 XY22X + Y X2YX + Y XY

43 The table 2 shows the electron arrangements of elements R, S, T dan U.Jadual 2 menunjukkan susunan elektron bagi unsur R, S, T dan U

Which of the following pair of elements can form ionic compound?

Antara pasangan unsur berikut, yang manakah boleh membentuk sebatian ion?

Elements

UnsurR S T U

Electron arrangement

Susunan elektr on2.4 2.8 2.8.7 2.8.8.2

A

B

C

D

R and S

R dan S

S and US dan U

T and UT dan U

R and TR dan T

2.0 g metal oxide J contains 1.2 g of element J

2.0 g oksida logam J mengandungi 1.2 g logam J



20/67


20

44 The reaction between hydrochloric acid and calcium carbonate produces carbon dioxide gas. The

reaction is complete in 50 seconds and the maximum volume of gas produced is 25 cm3.

Tindakbalas antara asid hidroklorik dengan kalsium kabonat menghasilkan gas karbon dioksida.Tindak balas lengkap dalam masa 50 saat dan isipadu maksimum gas ialah 25 cm3.

What is the average rate of reaction?Berapakah kadar tindak balas purata?

A

B

C

D

0.5 cm3s-11.0 cm3s-12.0 cm3s-1

4.0 cm3s-1

45 Diagram 11 shows the set-up of apparatus for the titration of sodium hydroxide solution withsulphuric acid.

Rajah11 menunjukkan susunan radas bagi titratan larutan natrium hidroksida dengan asidsulfurik

DIAGRAM 11RAJAH 11

What is the volume of 0.5 mol dm-3of sulphuric acid solution required to completely neutralize25 cm

3of 0.5 mol dm

-3sodium hydroxide solution?

Berapakah isi padu 0.5 mol dm-3

asid sulfurik diperlukan untuk meneutralkan lengkap 25 cm3

0.5 mol dm-3

larutan natrium hidroksida?

A

B

C

D

12.50 cm3

25.00 cm3

50.00 cm3

75.50 cm3

0.5 mol dm-3

of sulphuric acid solutionLarutan 0.5 mol dm

-3asid sulfurik

25 cm3of 0.5 mol dm-3sodium hydroxide +phenolphthalein

25 cm3 0.5 mol dm-3larutan natrium hidroksida+ fenolftalein



21/67


21

46 The following chemical equation shows the reaction of preparation lead(II) iodide salt.

Persamaan kimia berikut menunjukkan tindak balas penyediaan garam plumbum(II) iodida.

Pb (NO3)2(aq) + 2KI(aq) PbI2(s) + 2KNO3(aq)Pb (NO3)2(ak) + 2KI(ak) PbI2(p) + 2KNO3(ak)

What is the volume of potassium iodide 0.5 mol dm-3

solution needed to produce 4.61 g lead(II)iodide salt?

Berapakah isipadu larutan kalium iodida 0.5 mol dm-3yang diperlukan untuk menghasilkan4.61g garam plumbum(II) iodida?

[Relative atomic mass of Pb= 207, I= 127]

[Jisim atom relatif P= 207, I= 127]

A

B

C

D

20 cm3

40 cm3

400 cm3

1440 cm3

47 Diagram 12 shows the stages I, II, III and IV in the Contact Process during the preparation ofsulphuric acid.

Rajah 12 menunjukkan peringkat I, II, III dan IV bagi penyediaan asid sulfurik melalui prosesSentuh.

S I SO2 II SO3 III H2S 2O7 IV H2SO4

Which of the following chemicals is used at each stage?Antara bahan kimia berikut, yang manakah digunakan pada peringkat itu?

I II III IV

A O2 O2 H2O H2SO4

B O2 O2 H2SO4 H2O

C O2 H2O O2 H2SO4

D H2O O2 H2SO4 O2



22/67


22

48 Diagram 13 shows the set up of the apparatus for an experiment to determine the rate of reaction

between sodium thiosulphate solution and sulphuric acid solution.Rajah 13 menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindak balasantara natrium tiosulfat dengan asid sulfurik.

DIAGRAM 13RAJAH 13

Which of the following combination of conditions take the longest time for the mark X to disappearfrom sight?

Antara kombinasi keadaan berikut, yang manakah mengambil masa paling lama untuk tanda Xhilang daripada penglihatan?

A

B

C

D

Sulphuric acid solution

Larutan asid Sulf uri k

Sodium thiosulphate solution

Larutan natri um tiosulf at

Temperature/ 0C

Suhu/0C

Volume/cm3

I sipadu/cm3

Concentration/

mol dm-3

Kepekatan/

mol dm-3

Volume/cm3

I sipadu/cm3

Concentration/

mol dm-3

Kepekatan/

mol dm-3

10

10

10

20

1.0

1.0

0.5

0.5

50

50

50

40

0.5

0.5

0.5

0.5

30

40

30

40

Sodium thiosulphate solution and sulphuric acidLarutan natrium tiosulfat dan asid sulfurik



23/67


23

49 Diagram 14 shows the structural formula of carbon compound JRajah 14 di bawah menunjukkan formula struktur sebatian karbon J

DIAGRAM 14

RAJAH 14

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

[Relative atomic mass of H = 1, C = 12 ][Jisim atom relatif H = 1, C = 12]

I

II

III

IV

A

B

C

D

Empirical formula of J is C4H8Formula empirik J ialah C4H8

Name of the compound J is but-1-eneNama sebatian J ialah but-1-ena

Hydration of compoud J produce butan-1ol

Penghidratan sebatian J menghasilkan butan-1-ol

Complete combustion of compound J produce carbon dioxide gas and water

Pembakaran lengkap sebatian J menghasilkan gas karbon dioksida dan air

I and II onlyI dan II sahaja

III and IV onlyIII dan IV sahaja

I, II and III onlyI, II dan III sahaja

II, III and IV only

II, III dan IV sahaja

H H H H

| | | |HCC C = C H

| |

H H



24/67


25/67

Gerak Gempur SPM Chemistry paper 24541/2

2

1. Table 1 shows proton number and nucleon number for atom W, Xand Y.Jadual 1 menunjukkan nombor proton dan nombor nukleon bagi atom W, X dan Y.

Atom Proton number/

Nombor Proton

Nucleon number /

Nombor Nukl eon

W 11 23X 17 35

Y 17 37

TABLE /JADUAL1

(a) (i) What is meant by proton number?Apakah yang dimaksudkan dengan nombor proton ?

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

[1 mark](ii)What is the number of neutron in atom W ?

Apakah bilangan neutron dalam atom W?

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

[1 mark](b) Which atoms are isotopes? Explain why.

Atomatom yang manakah adalahisotop? Jelaskan mengapa.

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

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

[2 marks](c) Write the electron arrangement of atom X .

Tuliskan susunan elektron bagi atom X.

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

[1 mark]

(d) (i) Draw the electron arrangement of atom Y. In your diagram , show thenumber of proton and the number of neutron in the nucleus.

Lukiskan susunan elektron atom Y. Dalam rajah anda, tunjukkan

bilangan proton dan bilangan neutron dalam nukleus.

[2 marks]



26/67


3

(ii) What is the number of valence electron of atom Y?Apakah bilangan elektron valen bagi atom Y?

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

(iii) Write the formula of ion Y.Tuliskan formula ion Y.

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

(e) Write the symbol of atom X in the form of XAZ

.

Tuliskan simbol bagi atom X dalam bentuk XA

Z.

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

2 Diagram 2 shows the symbols of atom for element U, V, W and X.Rajah2 menunjukkan simbol- simbol atom bagi unsurU, V, W dan X.

U7

3 V

12

6 W

19

9 X

20

10

DIAGRAM /RAJAH2

(a) Write the electron arrangement of atom W.Tuliskan susunan elektron bagi atom W.

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

[1 mark]

(b) (i) Element U, V, W and X are placed in the same period in the Periodic Table.State the period.

UnsurU, V, W danX beradadalam kala yang sama dalam Jadual Berkala.Nyatakan kala itu.

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

(ii) Compare the atomic size of element V and X.Bandingkan saiz atom unsur Vdan X.

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

[1 mark]



27/67


4

(iii) Explain your answer in (b) (ii)Terangkan jawapan anda dalam(b) (ii).

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

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

(c) Element V can react with element W to form a compound.Unsur Vboleh bertindak balas dengan unsur Wmembentuk satu sebatian.

(i) Write the chemical formula for the compound.

Tuliskan formula kimia bagi sebatian itu.

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

(ii)State onephysical property for the compound formed.Nyatakan satu sifat fizikal bagi sebatian yang terbentuk.

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

(d) When element U react with element W, a compound is produced.

Apabila unsur Ubertindak balas dengan unsur W, satu sebatian terhasil.

(i) State the type of the compound produced.

Nyatakan jenis sebatian yang terhasil.

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

[1 mark ]

(ii) Draw the electron arrangement for the compound in (d) (i).Lukiskan susunan elektron bagi sebatian dalam (d) (i).

[2 marks]



28/67


5

3 Diagram 3 shows the set-up of apparatus of a voltaic cell.

Rajah3 menunjukkan susunan radas satu sel kimia.

DIAGRAM / RAJAH 3.1

Based on Diagram 3 , answer the following questions.Berdasarkan Rajah3,jawab soalan- soalan berikut:

(a) What is the energy change that occurs in the voltaic cell?Apakah perubahan tenaga yang berlaku dalam sel kimia?

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

(b) Write the formula of all ions in copper (II) sulphate solution.Tuliskan formula semua ion dalam larutan kuprum (II) sulfat.

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

(c) (i) Name the negative terminal of the voltaic cell.Namakan terminal negatif bagi sel kimia.

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

(ii) Explain your answer in (b)(i).

Terangkan jawapan anda dalam (b)(i).

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

[1 mark]

(d) (i) State oneobservation at copper plate.Nyatakan satu pemerhatian pada kepingan kuprum.

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

Copper (II) nitrate solution /

Larutan kuprum (II) nitrat

Copper plate /Kepingan kuprum

ZincPlate /

Kepingan

zink

V



29/67


6

(ii) Write the half equation for the reaction occur at the copper plate.Tuliskan persamaan setengah bagi tindak balas yang berlaku padakepingan kuprum.

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

[1 mark]

(e) What is the colour change of the copper(II)sulphate solution? Explain your

answer.Apakah perubahan warna larutan kuprum (II) sulfat ? Jelaskan jawapan anda.

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

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

(f) Another experiment is carried out by replacing the zinc plate with P , Q and Rmetals.Table 3.2 shows the results.

Eksperimen lain dijalankan bagi menggantikan kepingan zink dengan logam P,

Qdan R.Jadual 3.2menunjukkan keputusannya.

Pair of metal/

Pasangan l ogam

Voltage/

Voltan(V)

Negative terminal/

Terminal negative

P/Cu 2.7 P

Q/Cu 2.0 Q

R/Cu 0.5 R

TABLE/JADUAL3.2

(i) Arrange P, Q, R and Cu metal in accending order of electropositivity.Susunkan logamP, Q, R danCu mengikut tertib menaik keelektropositifan.

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

[1 mark](ii)Predict the voltage for pair of Q/R.

Ramalkan nilai voltan bagi pasanganQ/R

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



30/67


7

4 (a) Diagram 4.1 shows the set-up of apparatus to prepare soap.Rajah4.1 menunjukkan susunan radas untuk menyediakan sabun.

DIAGRAM /RAJAH4.1

(i) Name the process of preparing soap.Namakan proses penyediaan sabun.

.[1 mark]

(ii) Name the solution P.Namakan larutan P.

.[1 mark]

(iii) State the purpose of adding sodium chloride to the reaction mixture inthe experiment.

Nyatakan tujuan menambahkan natrium klorida kepada campurantindak balas dalam eksperimen itu.

.[1 mark]

(iv) Diagram 4.2 shows the structure of a soap ion.Rajah 4.2menunjukkan struktur satu ion sabun.

Part /Bahagian X Part/BahagianY

DIAGRAM/RAJAH4.2

Which part is soluble in the water and grease based on Diagram 4.2?

Bahagian manakah yang larut dalam air dan gris berdasarkan

CH 2

CH3

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2 CH2

C-O-||

O

Heat /

Panaskan

Palm oil /Minyak sawit

+

Solution/LarutanP

Distilled water /Air suling+

Sodium chloride /Natrium klorida

Cool/ SejukkanMixture/

Larutan

Soap/

Sabun



31/67


8

Rajah 4.2?

Water/air:

Grease/gris: .

[1 mark]

(b) Glass and ceramic are widely used in our daily life.Kaca dan seramik digunakan secara meluas dalam kehidupan harian.

(i) Name a chemical of the main component of glass and ceramicNamakan bahan kimia yang menjadi bahan utama dalam kaca dan

seramik

.[1 mark]

(ii) State a reason why glass is used as laboratory apparatus instead of metal.Nyatakan satu alasan mengapa kaca digunakan sebagai radas makmalbukannya logam.

[1 mark]

(iii)

Test tube Beaker Combustion tube

Tabung uji Bikar Tiub Pembakaran

DIAGRAM/RAJAH 4.3

State the type of glass that used in making the apparatus in Diagram 4.3Nyatakan jenis kaca yang digunakan untuk membuat alat radas dalamRajah 4.3

[1 mark]

(c) Photo chromic glass is a composite material.Kaca fotokromik adalah salah satu bahan komposit

(i) What is composite material?Apakah bahan komposit?

.[1 mark]



32/67


9

(ii) Name oneof the component in photo chromic glass?Namakan salah satu daripada komposisi dalam kaca fotokromik?

.

[1 mark]

(iii) State oneof the characteristic of lenses made from photo chromic glass.Nyatakan satuciri lensa yang diperbuat daripada kaca fotokromik.

.[1 mark]

5 Table 5 shows the formulae of three organic compounds.Jadual 5 menunjukkan formula bagi tiga sebatian organik

Organic compound

Sebatian organik

Formula

Formula

Butan-1-ol

Butan-1-olC4H10O

Butanoic acid

Asid ButanoikC4H8O2

But-1-ene

But-1-enaC4H8

TABLE /JADUAL5

Use the information in Table 5 to answer the following questions.Gunakan maklumat dalam Jadual 5 untuk menjawab soalan berikut.

(a) Name the homologous series for butan-1-ol.Namakan siri homolog bagi butan-1-ol

..

[ 1 mark]

(b) (i) Draw the structural formula of butan-1-ol

Lukiskan formula struktur bagi butan-1-ol



33/67


10

[ 1 mark](ii) The following structural formula is isomer of butanol.

Formula struktur berikut ialah isomer bagi butanol

CH3

CH3- C - CH3

OH

Name the isomer.Namakan isomer itu.

.[ 1 mark]

(c ) Butan-1-ol can react with butanoic acid to form compound X and water.Butan-1-ol boleh bertindak balas dengan asid butanoik untuk menghasilkansebatian X dan air.

(i) What is the name of this reaction?Apakah nama tindak balas ini.

.[ 1 mark]

(ii) Write the chemical equation for the reaction.Tuliskan persamaan kimia bagi tindak balas itu.

.[ 1 mark]

(iii) State onephysical property of compound X.Nyatakan satusifat fizik bagi sebatian X.

.[ 1 mark]

(d) Dehydration of butan-1-ol using porous pot chips produce but-1-ene.Draw the set up of apparatus used in the dehydration.

Pengdehidratan butan-1-ol menggunakan serpihan pasu berliang menghasilkan

but-1-ena. Lukiskan susunan radas yang digunakan dalam pengdehidratan itu.



34/67


11

[ 2 marks]

(e) When but-1-ene is mixed with bromine water , a reaction occur.Apabila but-1-ena dicampurkan dengan air bromin , satu tindak balas berlaku.

(i) Name the reaction .Namakan tindak balas itu.

.

[ 1 mark](ii) State oneobservation in the reaction.

Nyatakan satupemerhatian dalam tindak balas itu..

[ 1 mark ]

6 Diagram 6 shows the set- up of apparatus to investigate the reaction between potassiumiodide solution and chlorine water through the transfer of electrons at a distance..

Rajah 6menunjukkan susunan radas untuk menyiasat tindak balas di antara larutan kaliumiodide dan air klorin melalui pemindahan elektron pada satu jarak.

DIAGRAM /RAJAH6

(a) What is the function of dilute sulphuric acid?Apakah fungsi asid sulfurik cair?

[1 mark ]

(b) On the diagram 6, draw the direction of the flow of electrons.

Dilute sulphuric acid

G

Electrode Q

Chlorine waterPotassium iodide

solution

Electrode P



35/67


12

Pada rajah 6, lukiskan arah pengaliran elektronelektron.[1 mark ]

(c) (i) What is the colour change in the solution around electrode P?Apakah perubahan warna dalam larutan di sekitar elektrod?

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

(ii) Describe a chemical test to determine the product formed in the solution at

electrode P.Huraikan satu ujian kimia untuk menentukan hasil yang terbentuk dalam larutan

di elektrodP.

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

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

(d) What is the substance that is being oxidised in the experiment? Explain why.Apakah bahan yang dioksidakan dalam eksperimen?Terangkan mengapa.

.....

.....

[2 marks ](e) Write a half equation for the reaction that occurs at electrode Q.

Tuliskan satu persamaan setengah bagi tindak balas yang berlaku di elektrodQ.

....[1 mark ]

(f) Suggest another reagent that can replace chlorine water.Cadangkan reagen lain yang boleh menggantikan air klorin.

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

(g) What is the change in oxidation number of chlorine in the reaction?Apakah perubahan nombor pengoksidaan bagi klorin dalam tindak balas?

......[1 mark ]



36/67


13

Section B

[20 marks]

Answer any onequestion.

The time suggested to answer this section is 30 minutes.

7 (a) Table 7 shows the incomplete observation for two experiments to

construct balanced chemical equation.Jadual 7 menunjukkan pemerhatian yang tidak lengkap bagi dua eksperimenuntuk membina persamaan kimia yang seimbang.

ExperimentEksperimen

ProcedureProsedur

ObservationPemerhatian

A Copper(II)carbonate is heatedand the gas produced is passedthrough lime water.

Kuprum(II)karbonatdipanaskan dan gas yangterhasil dialirkan melalui airkapur.

Green solid turns black.The lime water turns milky.

Pepejal hijau menjadi hitam.

Air kapur menjadi keruh.

B Potassium iodide solution is

added to lead(II) nitratesolution.

Larutan kalium iodidaditambah kepada larutan

plumbum(II)nitrat.

TABLE /JADUAL 7

(i) Based on the observation, name the products in experiment A and writethe chemical equation for the reaction.

Berdasarkan pemerhatian , namakan hasil tindak balas dalam

eksperimen A dan tuliskan persamaan kimia bagi tindak balas itu.[ 3 marks]

(ii) State oneobservation in experiment B and name the product.Write the chemical equation for the reaction.

Nyatakan satupemerhatian dalam eksperimen B dan namakanhasil tindak balas itu. Tuliskan persamaan kimia bagi tindak balas

itu.[ 4 marks]



37/67


38/67


15

8 (a) State three factors affecting the rate of reaction.

Nyatakan tiga faktor yang mempengaruhi kadar suatu tindak balas.[3 marks]

(b) An experiment is carried out to study the rate of reaction between magnesiumand hydrochloric acid. The time taken by magnesium to dissolve in acid in each

experiment is recorded in Table 8.Satu eksperimen dijalankan untuk mengkaji kadar tindak balas antara

magnesium dan asid hidroklorik. Masa magnesium larut di dalam asid dalamsetiap eksperimen dicatat seperti dalam jadual8

ExperimentEksperimen

ReactantBahan tindak balas

Temperaturesuhu(0C)

Timemasa

(s)

I

20 cm3of 0.5 mol dm-3hydrochloric acid +2 g of magnesium strip

20 cm3 asid hidroklorik 0.5 mol dm

-3+

2 g pita magnesium

30 120

II

20 cm3of 1.0 mol dm-3hydrochloric acid +2 g of magnesium strip

20 cm3asid hidroklorik 1.0 mol dm-3+

2 g pita magnesium

30 60

III

20 cm3of 1.0 mol dm

-3hydrochloric acid +

2 g of magnesium powder

20 cm3asid hidroklorik 1.0 mol dm-3+

2 g serbuk magnesium

30 40

IV

20 cm3of 1.0 mol dm-3hydrochloric acid +

2 g of magnesium strip +5 drops of copper(II) sulphate solution

20 cm3asid hidroklorik 1.0 mol dm-3+2 g pita magnesium + 5 titik larutan kuprum(II)

sulfat

30 45

TABLE/JADUAL8

(i) Write an ionic equation for the reaction between magnesium and acid.Tuliskan persamaan ionik yang berlaku antara magnesium dan asid.

[1 mark]



39/67


16

(ii) Compare the rate of reaction for experiment I and experiment II, experiment II and experiment III. experiment II and experiment IVExplain your answer based on the collision theory.

Bandingkan kadar tindak balas antara

eksperimen Idan eksperimen II eksperimen IIdan eksperimen III

eksperimen IIdan eksperimen IV

Terangkan jawapan andaberdasarkan teori perlanggaran[9 marks]

(iii) If experiment II is repeated at 400C, predict the time taken for the 2 g

magnesium to dissolve completely. Explain your answer.Jika eksperimen II diulangi pada suhu 400C, cadangkan masa yangdiambil untuk 2 g magnesium larut sepenuhnya. Jelaskan jawapan anda.

[3 marks]

(c) Based on the collision theory, explain why we need to store fresh milk in a

refrigerator.Berdasarkan Teori Perlanggaran, terangkan mengapa kita perlu menyimpansusu segar dalam peti sejuk.

[4 marks]



40/67


17

Section C

[20 marks]

Answer any onequestion.

The time suggested to answer this section is 30 minutes

9 (a) Diagram 9 shows the reactions involved in the preparation of soluble salts.

DIAGRAM/RAJAH9

(i) Sodium, potassium and ammonium salts can be prepared using reactionbetween acid and alkali. State the reaction X, Y and Z.Garam natrium, kalium dan ammonium dapat disediakan melalui tindakbalas antara asid dan alkali. Nyatakan tindak balasX, Y danZ.

[3marks]

(ii) By choosing oneof the reactions in (a) (i), suggest example of reactantsused and products formed.Write the chemical equation for the reaction based on your suggestion.

Dengan memilih satudaripada tindak balas dalam(a) (i), cadangkan

contoh bahan- bahan tindak balas yang digunakan dan hasil-hasiltindak balas yang terbentuk.

Tuliskan persamaan kimia bagi tindak balas berdasarkan cadangananda itu.

[3marks]

Soluble salts /

Garam larut

Sodium salts /Garam natrium

Potassium salts /Garam kalium

Ammonium salt /Garam ammonium

Other salts /

Garam lain

Asid + alkali salt + water

Asid + alkaligaram + air

Reaction / Tindak balasX

Reaction / Tindak balasY

Reaction / Tindak balasZ



41/67


18

(b)

Answer the following questions based on the above statement.

Jawab soalan- soalan berikut berdasarkan pernyataan di atas.

(i) Describe a laboratory experiment to prepare a dry magnesium sulphate.In your description, include the chemical equation involved.

Huraikan satu eksperimen makmal untuk menyediakan garam

magnesium sulfat yang kering. Dalam huraian anda sertakan persamaan

kimia bagi tindak balas yang terlibat.[10 marks]

(ii) Describe a simple chemical test of how you could differentiate betweenmagnesium sulphate and magnesium nitrate.

Huraikan satu ujian kimia ringkas bagaimana anda membezakan antaralarutan magnesium sulfat dan magnesium nitrat.

[4marks]

10 Table 10 shows the molecular formula and heat of combustion of three types of alcohol.Jadual 10menunjukkan formula molekul dan haba pembakaran bagi tiga jenis alkohol.

Alcohol/

Alkohol

Molecular formula /

Formula molekul

Haba pembakaran /Heat of combustion

(kJ mol-1

)

Methanol CH3OH 725

Ethanol C2H5OH 1 376

Propan-1-ol C3H7OH 2 015

TABLE /JADUAL10

(a) (i) What is the meaning of the heat of combustion of an alcohol?

Apakah yang dimaksudkan dengan haba pembakaran alkohol?[ 1mark]

(ii) Explain why there are differences in the value of heat of combustion ofthe alcohols in Table 10.

Terangkan mengapa terdapat perbezaan nilai haba pembakaran bagialkohol-alkohol dalam Jadual 10.

[ 3marks]

Magnesium sulphate is a soluble salt.

Magnesium sulfat adalah garam terlarutkan.



42/67


19

(b) Describe an experiment that you can carry out in your school laboratory todetermine the heat of combustion of oneof the alcohol in Table 10. Your

description should include precautionary steps and the steps involved in thecalculation.

Huraikan satu eksperimen yang anda boleh jalankan di makmal sekolah anda

bagi menentukan haba pembakaran salah satualkohol dalam Jadual 10.Huraian anda perlu mengandungi langkah berjaga-jaga dan langkah-langkah

perhitungan yang terlibat.[12 marks]

(c) In another experiment to determine the heat of precipitation of lead (II) sulphate,50.0 cm3of 2.0 mol dm-3lead(II) nitrate solution is reacted with 50.0 cm3of 2.0mol dm

-3sodium sulphate solution. Increment of the temperature in the mixture

is 10 oC.Dalam satu eksperimen lain bagi menentukan haba pemendakan plumbum(II)

sulfat, sejumlah 50 cm3larutan plumbum(II) nitrat 2.0 mol dm-3dicampurdengan 50 cm3larutan natrium sulfat 2.0 mol dm-3.Kenaikan suhu campuran

ialah 10oC.

The equation for the reaction is :Persamaan bagi tindak balas tersebut adalah :

Pb(NO3)2 + Na2SO4 PbSO4 + 2NaNO3

Calculate the value of the heat of precipitation of lead(II) sulphate in thisreaction.

Hitungkan haba pemendakan plumbum(II) sulfat dalam eksperimen ini.

[Use the information that the specific heat capacity of water is 4.2 J g -1 oC-1]

[Gunakan maklumatmuatan haba tentu larutan adalah4.2 J g-1 o

C-1

][4 marks]

END OF QUESTION PAPER



43/67


4541/3 [Next page

3

Answer all questionsThe time suggested to complete Question1 andQuestion 2 is 45 minutes

1 A student carried out two experiments to determine the concentration of HX acid solution.Seorang pelajar menjalankan dua eksperimen untuk menentukan kepekatan larutan asid HX.

Experiment IEksperimen I

Titration of HX acid solution of unknown concentration with 20cm3 of sodium hydroxidesolution 1.0 mol dm-3using phenolftalein as indicator.

Pentitratan larutan asid HX yang tidak diketahui kepekatannya dengan 20cm3 larutan

natrium hidroksida 1.0 mol dm-3 menggunakan penunjuk fenolftalein.

Experiment II

Eksperimen I I

Titration of similar HX acid solution of difference concentration with 20cm3of sodium

hydroxide solution 1.0 mol dm-3using phenolftalein as indicator.Pentitratan larutan asid HX lain yang tidak diketahui kepekatannya dengan 20cm

3larutan

Natrium Hidroksida 1.0 mol dm-3 menggunakan penunjuk fenolftalein.

Diagram 1 shows the initial and final burette readings for both experiments.

Rajah 1 menunjukkan bacaan awal dan bacaan akhir buret bagi kedua-dua eksperimen.

Experiment 1Eksperimen 1

Initial burette reading Final burette readingBacaan awal buret Bacaan akhir buret

20

1

0

21

For

Examin

Use



44/67


4541/3 [Next page

4

Experiment IIEksperimen II

Initial burette reading Final burette readingBacaan awal buret Bacaan akhir buret

Diagram 1

Rajah 1

(a) Construct a table to record the initial and final burette readings and the volumes of the acidused for both experiments.

Bina jadual dan catat bacaan awal dan bacaan akhir buret serta isipadu asid yang digunakanbagi kedua-dua eksperimen di atas.

[ 3marks]

(b) State the colour change of phenolftalein in the titration.Nyatakan perubahan warna fenolftalein dalam titratan tersebut.

..[ 3marks]

1 a

1 b

25

16

15

26

Fo

Examin

Us



45/67


4541/3 [Next page

5

(c) The chemical equation for the reaction in the experiment is :Persamaan kimia bagi tindak balas dalam eksperimen ini ialah :

Calculate the concentration of HX acid solutions used in both experiments.Hitung kepekatan larutan asid HX yang digunakan dalam kedua-dua eksperimen.

Experiment IEksperimen I

Experiment IIEksperimen II

[ 3marks]

(d) State the hypothesis in this experiment.Nyatakan hipotesis bagi eksperimen ini.

..

.. [ 3marks]

HX + NaOH NaX + H2O

1 c

1 d

Fo

Exami

Us

Fo

Exami

Us



46/67


4541/3 [Next page

6

(e) If HX acid is replaced with sulphuric acid of the same concentration, it is found that the volumeof the sulphuric acid used in the titration is half of the volume of HX acid. Explain why.

Jika asid HX digantikan dengan asid sulfurik yang mempunyai kepekatan yang sama, didapatiisipadu asid sulfurik yang digunakan dalam titratan ialah separuh daripada isipadu asid HX.Terangkan mengapa.

[ 3marks]

2 Diagram 2 shows the apparatus set-up for an experiment to compare the heat of combustion ofmethanol and ethanol. 200 cm3of water is used in this experiment.

Rajah di bawah menunjukkan susunan radas bagi eksperiment untuk membandingkanHaba pembakaran antara metano dengan etanol. 200 cm3air digunakan dalam ekperimen ini.

Diagram 2

Rajah 2

ThermometerThermometer

Tripod stand

Tungku kaki tiga

Copper containerBekas kuprum

Spirit lamp

Pelita

Wooden block

Blok kayu

AlcoholAlkohol

Water

Air

Wind shieldPenghadang

1 e

Tot

F

Exam

U



47/67


4541/3 [Next page

7

The table below shows the results obtained from the experiment I the heat of combustion ofmethanol and experiment II the heat of combustion of ethanol.

Jadual di bawah menunjukkan keputusan eksperimen I haba pembakaran methanoldan eksperimen II haba pembakaran etanol.

Experiment I

Eksperimen I

Experiment II

Eksperimen I I

Initial temperature of water: ..................Suhu awal air

Initial temperature of water: .........................Suhu awal air

Highest temperature of water: ...........................Suhu tertinggi air

Highest temperature of water: ..........................Suhu tertinggi air

Initial mass of spirit lamp and methanol: .............gJisim awal pelita dan metanol

Initial mass of spirit lamp and ethanol: ....... gJisim awal pelita dan metanol

Final mass of spirit lamp and methanol: ......g

Jisim akhir pelita dan metanolFinal mass of spirit lamp and ethanol: ............. g

Jisim akhir pelita dan etanol

20

25

15

20

25

15

60

65

55

60

65

55

150.50

150.50149.37

151.35

Fo

Exami

Us



48/67


4541/3 [Next page

8

(a) Write the readings of the temperature and the mass of spirit lamp and alcohol in the spaces above.Tuliskan bacaan suhu dan jisim pelita dan alkohol dalam ruangan di atas.

[3 marks]

(b) Based on the information above, complete the table below.Berdasarkan kepada maklumat di atas lengkapkan jadual di bawah.

Name of variables

Nama pemboleh ubah

Action to be taken

Tindakan yang dibuat

(i) Manipulated variable:Pemboleh ubah dimanipulaskan:

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

...........

(i) The way to manipulate variable:Cara mengubah pemboleh ubah

dimanipulasi:

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

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

(ii) Responding variable:

Pemboleh ubah bergerak balas:

(ii) What to observe in the responding variable:

Apa yang diperhatikan bagi menentukanpemboleh ubah gerak balas:

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

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

(iii) Fixed variable:Pemboleh ubah yang dimalarkan:

...

...

(iii) The way to maintain the controlled variable:Cara menetapkan pemboleh ubah dimalarkan :

[3marks]

(c) (i) Calculate the energy change in the experiment I and II.

Hitungkan perubahan tenaga dalam eksperimen I dan II

[Given: Energy change = mc, specific heat capacity of water, c = 4.2 Jg -1oC]

[Diberi: perubahan tenaga = mc, muatan haba tentu air, c = 4.2 Jg-1oC]

[3 marks]

2 a

2 b

2(c)(i

ForExamin

Use



49/67


4541/3 [Next page

9

(ii) Calculate the number of moles of methanol and ethanol burnt in this experiment.Hitungkan bilangan mol methanol dan etanol yang terbakar dalam eksperimen ini.

[Molar mass of methanol = 32 g mol-1

] [Molar mass of ethanol = 46 g mol-1

][Jisim molar metanol = 32 g mol

-1] [Jisim molar etanol = 46 g mol

-1]

[3 marks]

(iii) Calculate the heat of combustion of methanol in this experiment.Hitungkan haba pembakaran metanol dalam eksperimen ini.

[3 marks]

(d) Predict the heat of combustion of ethanol compare to the heat combustion of methanol.Ramalkan haba pembakaran etanol berbanding dengan haba pembakaran methanol.

[3 marks]

2(c)(ii)

2(c)(iii)

2(d)

Total

For

Examin

Use



50/67


4541/3 [Next page

10

You are given the copper strip, lead strip, iron strip, zinc strip, aluminium strip, magnesium stripand copper(II) sulphate solution.Referring to the statement above, plan a laboratory experiment toconstruct the electrochemical series of the potential differences using different pair of metals.Your explanation should include all the followings:

Anda dibekalkan dengan kepingan kuprum, kepingan plumbum, kepingan ferum, kepingan zink,

kepingan aluminium, kepingan magnesium dan larutan kuprum(II) sulfat. Merujuk kepada situasidi atas, rancangkan satu eksperimen dalam makmal untuk membina siri elektrokimia .

Penerangan anda hendaklah mengandungi perkara-perkara berikut:

(a) Aim of the expermentTujuan eksperimen

(b) All the variablesSemua pemboleh ubah yang terlibat

(c ) Statement of the hypothesisPernyataan hipotesis

(d) List of materials and apparatusSenarai bahan dan alat radas

(e) Procedure of the experimentProsedur eksperimen

(f) Tabulation of dataPenjadualandata

[ 17 marks]

END OF QUESTION PAPER

The further the distance between two metals in the electrochemical series,the bigger the potential difference.

Semakin jauh kedudukan pasangan logam dalam siri elektrokimia,semakin besar nilai voltan.



51/67

SPM Chemistry skema gerak gempur paper 1

1 A 21 A 41 A

2 C 22 A 42 A

3 A 23 C 43 C

4 C 24 C 44 A

5 D 25 C 45 A

6 D 26 C 46 B

7 C 27 D 47 B

8 C 28 D 48 C

9 D 29 C 49 D

10 A 30 B 50 B

11 C 31 D

12 D 32 D

13 D 33 C

14 D 34 B

15 C 35 C

16 C 36 D17 C 37 A

18 B 38 C

19 C 39 D

20 C 40 C



52/67

Gerak Gempur SPM Chemistry skema paper 24541/2

1

Section A

1 (a) (i) The number of protons in an atom 1(ii) 12 1

(b) Xand Y 1

Because same proton number/the number of proton but differencenumber of neutron/nucleon number 1

(c) 2.8.7 1

(d) (i)

Electron arrangementLabel 17p & 18n

11

(ii) 7 1(iii) Y - 1

(e) X35

17 1

10

2 (a) 2.7 1

(b) (i) Period 2 1

(ii) Atomic size of X is smaller than V // Atomic size of V bigger thanX.

1

(iii) The number of proton in atom X is more than V.The attraction by the nucleus on electron in atom X is stronger thanV.

orThe number of proton in atom V is less than X.The attraction by the nucleus on electron in atom V is weaker thanX.

11

11...2

(c) (i) VW4 1(ii) has low melting / boiling point // cannot conduct electricity

in any state // soluble in organic solvent 1

(d) (i) Ionic compound 1

(ii)

U W

17p

18n



53/67


2

[Number of electron each shells are correct][Number of charge symbol are correct]

11

10

3 (a) Chemical to electrical 1

(b) Cu2+, H+, OH-and SO42- 1

(c) (i) Zinc 1(ii) Zinc atom releases electrons//Zinc more electropositive // Zn above

in electrochemical series 1

(d) (i) Brown solid deposited 1(ii) Cu2+ + 2e Cu 1

(e) Blue to colourless// Blue become fade/ paler // The intensity ofblue colour decreases.The number of copper(II) ions decreases //The concentration ofcopper(II) ions decr

1

1

(f) (i) Cu, R, Q, P 1(ii) 1.5 V 1

10

4 (a) (i) Saponification 1(ii) Concentrated sodium hydroxide solution 1(iii) to lower the solubility of soap 1

(iv) Water: x Grease: y 1

(b) (i) silicon dioxide 1(ii) inert towards chemicals 1(iii) Borosilicate glass 1

(c) (i) Structural material that is formed by combining two or more

different subtances. 1(ii) silver bromide / Copper(I) chloride 1

(iii) darken when exposed to sunlight10

5 (a) (i) alcohol 1

(b) (i) H H H H

H C C C C-O-H

1



54/67


3

H H H H

(ii) 2-methylpropan-2-ol 1

(c) (i) Esterification 1(ii) C4H9OH + C3H7COOH C3H7COOC4H9 + H2O 1(iii) Insoluble in water // sweet smell // volatile 1

(d) [Functional diagram][Label]

11

(e) (i) Addition reaction 1

(ii) The colour of bromine water change from brown to colourless 1

10

6 (a) To allow the movement of ions. 1(b)

1

(c) (i) Colourless change to brown 1(ii) Place a few drops of starch solution.

A blue precipitate is formed.11

(d) Iodide ion // potassium iodide

Loss electron//increase in oxidation number

1

1

(e) Cl2+ 2e2Cl- 1

(f) Bromine water // acidified KMnO4solution // acidified K2Cr2O7

solution

1

(g) 0 to -1 1

10

Section B

7 (a) (i) Copper(II)oxideCarbon dioxideCuCO3 CuO + CO2

111...3

Dilute sulphuric acid

G

Electrode Q

Chlorine waterPotassium iodide

solution

Electrode P

e

ee

e



55/67


4

(ii) Yellow precipitate

Lead(II) iodide

2KI + Pb(NO3)2 PbI2 + 2KNO3Formula of reactants and products are correctBalance

1

1

11...4

(b) XH react with QY2to produce QX2and HY //Reactants : XH and QY2 Products : QX2and HY

HX aqueous solution react with QY2aqueous solution to

produce QX2solid and HY aqueous solution

2 mole of HX react with 1 mole of QY2 to produce1 mole of QX2and 2 mole of HY.

HX : Hydrochloric acid / HClQY2: Lead (II)nitrate / Pb(NO3)2

1

1

1

11...5

(c) (i) C H85.70 14.3012 1

7.14 14.30

7.14 7.14

1 2

The empirical formula CH2

1

1

1..3

(ii) ( CH2)n= 56

[ 12 + 2(1) ]n = 56

56 // 414The molecular formula C4H8

1

1

1..3

(iii) Empirical formula Molecular formula

The formula shows that carbonand hydrogen are present

The formula shows that carbonand hydrogen are present

The formula shows that theratio of carbon to hydrogen is1:2

The formula shows that onemolecule of X consists of 4carbon atoms and 8 hydrogen

atoms 1 + 1220

8 (a) Size of solid particlesConcentration of solution 1Temperature 1Catalyst 13[any three]



56/67


5

(b) (i) Mg + 2H+ Mg2+ + H2 1

(ii) Comparing experiment II and experiment I

The concentration of hydrochloric acid in experiment IIis higher than experiment I . 1

The frequency of collision between H+ions and

magnesium atom increases. 1

The frequency of effective collision increases. 1

Comparing experiment II and experiment III

The total surface area of magnesium in experiment III

is larger than experiment II. 1

The frequency of collision between H+ionsand magnesium atom increases. 1

The frequency of effective collision increases. 1

Comparing experiment II and experiment IV

Copper(II) sulphate solution is a catalyst 1

It lower the activation energy 1The number of effective collision increases. 1..9

(iii) The time taken becomes shorter / less than 60s 1

When the temperature increases, the kinetic energy of H+ions increases / H+ions move faster. 1

The frequency of effective collision between H+ions and magnesiumatom increases // The number of effective collision increases. 1........3

(c) The temperature inside the refrigerator is lower 1Bacteria are not active at low temperature 1

Decomposition of milk caused by bacteria will slow down 1This will keep the milk fresh for a longer period 1...4

20Section C

9.(a) (i) 1. acid and metal oxide 1

2. acid and reactive metal 1



57/67


6

3. acid and metal carbonate 1 3

(ii) Sample answer[ Name any acid ] and [ Name any metal / metal oxide / metal carbonate ] 1[ Name equivalent salt and water// water + CO2// water + H2] 1[ Balanced equation ] 1 3

(b) (i) [chemical substances - 1 mark][ apparatus - 1 mark]

[procedure - 7 marks][chemical equation - 1 mark]

Sample answer :

1. [chemical substances]magnesium powder /magnesium oxide(Hydroxide, carbonate)and sulphuric acid 1

2. [ apparatus]Beaker, filter funnel, filter paper, glass rod 1

3. [procedure][20100] cm3 sulphuric acid [0.52.0 ] mol dm-3is poured into a beaker 1

4. magnesium powder is added to sulphuric acid until undissolved /excess /no more effervescence 1

5. Stir

6. the mixture is filtered 17. the filtrate is evaporated until saturate (one-third of it original volume) 18. the saturated solution is then allowed to cool to room temperature. 19. crystals is dried between filter paper 1

10. [chemical equation]

Mg + H2SO4 MgSO4 + H2// MgO + H2SO4 MgSO4 + H2O//MgCO3 + H2SO4 MgSO4 + CO2+ H2O 1.... 10

(ii) [ test for sulphate ]

1. Each of solution is filled into a two test tube 12. Lead (II) nitrate/ Silver nitrate is added to both of test tube 13. If no change occur magnesium nitrate solution 1

4. If white precipitate is formedmagnesium sulfat solution 1.... 4

OR [test for nitrate]

1. Each of solution is filled into a two test tube 12. [Add]dilute sulphuric acid, Iron (II) sulphate solution, concentrated

sulphuric acid to both of test tube 13. if brown ring is formedmagnesium nitrate solution 14. If no changes occur magnesium nitrate solution 1... 4

20

10 (a) (i) The heat given off when onemole of an alcohol is burnt completelyin an

excess of oxygen. 1(ii) As the number of carbon atom increase, the value of heat combustion

increase.

1



58/67


7

The greater the number of carbon atoms, the more products will be

obtained.More heat is released for the formation of bonds

1

1

(b) Procedure :

1. Measure [100 -250] cm3of water and pour it into the coppercontainer /aluminium can

2. Measure and record the initial temperature of the water.3. Fill the small lamp with alcohol* then weigh it and record the

initial mass.4. Light the wick of the lamp.5. Place the lamp as near as possibleto the copper container.//

[ Diagram : Using wooden block ]6. [The apparatus is protected by a wind shield] // [Diagram]7. Stir the water continuously.8. Put out / blown out the flame when the temperature rises [ 10

30 ] oC and record the highest temperature of the water.9. Weigh the lamp as quickly as possibleand record the final mass.

11

11

11

1

11

Result :

Initial temperature of the water/ oC = T1Highest temperature of the water/ oC = T2

Temperature rise of the water/ oC = T2T1

Initial mass of lamp + alcohol* / g = m1Final mass of lamp + alcohol* / g = m2

Mass of alcohol that was burnt / g = m1m2

1

Calculation :

Energy chage/heat given off = 200 4.2 (T2T1)

Number of mole of alcohol =

Heat of combustion of alcohol*, H =

=

1

1

1

13

Max

12

(c)

Number of mole of lead(II) nitrate =50 x 2

1000 = 0.1 mol

or

m1m2

Mrof alcohol*

Energy change

Number of mole of alcohol

200 4.2 (T2T1)

m1m2

Mrof alcohol*



59/67


8

Number of mole of sodium sulphate =50 x 2

1000 = 0.1 mol

1

Ratio of mole :

1 mol Pb(NO3)2 / Na2SO4 1 mol PbSO40.1 mol Pb(NO3)2 / Na2SO4 0.1 mol PbSO4 1

Energy chage/heat given off = 200 4.2 10

= 4200 J 1

Heat of precipitation of PbSO4 =

1.0

4200

= 42000 J mol-1/ 4.2 kJ mol-1

14

20

END OF MARKING SCHEME



60/67

Gerak Gempur SPM Chemistry skema paper 3

1

Question

Number

Rubric Score

1(a)

[Able to exhibit the tabulation of data correctly]

Tabulation of data has the following element :

3 columns and 4 rows Table contains topics, labeled with two decimal place and unit

Example :

Experiment I II

Initial reading/ cm 0.45 15.45Final reading / cm

3 20.45 25.45

Volume of HX /cm3 20.00 10.00

3

[Able to exhibit the tabulation of data less accurately, without unit/ one

decimal place]2

[Able to state an idea about tabulation of data]Table contains at least two columns and two rows 1

[No response or wrong response] 0

Question

Number

RubricScore

1(b)

[Able to state one observation accurately]

Example :Red/Pink to colourless

3

[Able to state one observation less accurately]

Example :

colourless

2

[Able to state an idea about the observation]

The colour changes // pink1




61/67


2

Question

Number

RubricScore

1(c)

[Able to show the calculation of HX acid concentration with the unit for both

experiment correctly]

Example :

Experiment IThe concentration of HX acid = (1)(20) / 20

= 1.0 moldm-3

or(i) Number of mole for NaOH = (1)(20)/1000)

= 0.02 mol

(ii) Based on the equation,1 mol of NaOH reacts with 1 mol of HX acid,

0.02 mol of NaOH reacts with 0.02 mol ofHX acid.

(iii) Concentration of HX acid = ( 0.02 x 1000 ) / 20= 1.0 moldm

-3

Experiment II

The concentration of HX acid = (1)(20) / 10

= 2.0 moldm-3

or(i) Number of mole for NaOH = (1)(20)/1000)

= 0.02 mol

(ii) Based on the equation,1 mol of NaOH reacts with 1 mol of HX acid,

0.02 mol of NaOH reacts with 0.02 mol of HX acid.

(iii) Concentration of HX acid = ( 0.02 x 1000 ) / 10= 2.0 moldm

-3

3

[Able to show the calculation of HX acid concentration without unit for both

experiment less correctly] 2

[Able to show an idea to calculate the concentration] 1




62/67


3

Question

Number

Rubricscore

1(e)

[Able to compare HX acid with sulphuric acid correctly]

Example :

HX acid is a monoprotic/monobasic acid Sulphuric acid is a diprotic/dibasic acid Number of hydrogen ion in 1 mol of sulphuric acid is double of HX acid//

total number of hydrogen ions in both solution are the same

3

[Able to state any two of the above mentioned answers less correctly]2

[Able to state any one of the above mentioned answers]1


Question

NumberRubric Score

2(a)

[Able towrite initial and final temperature with one decimal, initial and final

mass of spirit lamp and methanol and ethanol with two decimal in

experiment I and II with unit accurately]Answer :

Experiment I : Initial temperature of water : 25.0oC

Highesttemperature of water : 65.0 oCInitial mass of spirit lamp and methanol: 150.50 g

Final mass of spirit lamp and methanol : 149.37 g

Experiment II : Initial temperature of water : 25.0oC

Highest temperature of water : 65.0oC

Initial mass of spirit lamp and ethanol: 151.35 g

Final mass of spirit lamp and ethanol : 150.50 g

3

Question

Number

Rubric

Score

1(d)

[Able to state hypothesis correctly]

Example :The higher/lower the concentration of HX acid, the lower/higher the volume of the

acid to neutralize the sodium hydroxide solution / alkali.

3

[Able to state hypothesis almost correct]

Example :The lower/higher the volume of the acid to neutralize the alkali, the higher/lower the

concentration of HX acid.

2

[Able to state an idea about the hypothesis]

Example:Concentration of the acid affects the volume of acid

1




63/67


4

[Able towrite initial and final temperature of waterwith one decimal without

unit, initial and final mass of spirit lamp and methanol and ethanol with twodecimal in experiment I and II accurately]

2

[Able towrite at least one initial or final temperature of waterwithout unit,

initial or final mass of spirit lamp and methanol and ethanol in experiment I

and II ]

1

[ No response / wrong response ] 0

Question

NumberRubric Score

2 (b)

[ Able to state three variables and the way to control them correctly ]

Example :

Manipulated variable :Types of alcohol//ethanol and

methanol

Using difference alcohol

Responding variable :Heat of combustion The different of mass of difference

alcohol

Fixed variable :Volume of water// same increment

of temperature

Using the same volume of water //

same increment of temperature

3

[ Able to state any pairof variable and action correctly ] ] 2

[ Able to state any variable and any action correctly // any two variables

correctly // any two action correctly]1

[ No response or wrong response] 0

Question

NumberRubric Score

2(c)(i)

[ Able to show the calculation correctly with unit ]

Example :Experiment I

Energy change = 200 x 4.2 x 40 = 33 600 J

Experiment IIEnergy change = 200 x 4.2 x 40 = 33 600 J

3

[ Able to show the calculation correctly without unit ]2

[ Able to state an idea the calculation the energy change]1




64/67


5

Question

NumberRubric Score

2(c)(ii)

[ Able to show the calculation correctly with unit]

Example :

The number of moles methanol = 1.13 = 0.035 mol32

The number of moles ethanol = 0.85 = 0.018 mol

46

3

[ Able to show the calculation correctly without unit]2

[ Able to state an idea the calculation the number of mole]1


Question

NumberRubric Score

2(c)(iii)

[ Able to show the calculation correctly with unit ]

Example :The heat combustion of methanol = 33 600 J

0.035

= 960 000 J mol-1

= 960 kJ mol-1

3

[ Able to show the calculation correctly without unit]2

[ Able to state an idea the calculation the heat of combustion of methanol]1


Question

NumberRubric

Maxi

mum

Score

2(d)

[Able to predict the heat combustion of ethanol correctly]

Example:Higher than heat combustion of methanol

3

[Able to state the heat combustion of ethanol]Example:

1818 kJ mol-1

[The heat combustion of et

2010 chemistry qa perak(gerak+gempur)

Documents