Spm Trial 2012 Chemistry Qa Kedah

SULIT 454lll

PROGRAII PENINGKATAN PRESTASI AKADEMIKSPM

TAHUN 2412

CHEMISTRY

Kertas 1

Satu jam dan lima belas minit

1.

2.

3.

JANGAN BUKA KERTAS SOATAN INI SEHINGGA DIBERITAHU

Kertas soalan ini adalah dalam dwibahasa

Soalan dalam bahasa lnggeris mendahului soalan yang sepadan dalam bahasa Melayu

Calon dikehendakimembaca maklumat dihalaman belakang kertas soalan ini.

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INFOR]VIATION T'OR CANDIDATESMAKLUMAT T'NTUK CALON

l. This question paper consists of 50 questions,

Kertas soalan ini mengandungi 50 soalm.

2. Answerall questions.Jawab semuo soalan.

3. Each question is followed by four alternative answers, AP.C and D. For each

question, choose one answer only. Blacken your answer on the objective answer

sheet provided.TiaVtiap soalan diih.ti aleh emqtat pililnniawapan. iaitu A,8,C dan D. Bagiset@ s(xrl(m, pilih saUjan'apan sahaia. Hitamkanin+,apan mda pada kertasjawqan objektf ymg disediakan.

4. If you wish to change your answer, eras€ the blackened mark that you have made.

Then blacken the new answer.Setiranyo onda lrendak menulmriawapan, padamkan tanda yang telah dibuat.

Ikmtiian httankan iov' apm yang baru.

6. The diagrams in ths questions provided are not drawn to scale unless stated.

Rajah yang mengiringi soalan tidak dilukis mengihtt skola kecuali dinyaalcan

7. You may us€ a non-programmable scientific calculator.Atdo dihenarkan nengunakan kalhiator saintiJikyang tidak boleh diprogram.

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Diagram I shows a stnrcfuie ofammonia molecule, NH3.Ralah I nrenunjukkan satu stntVur molefutl ammonia"NHz

Diagram I

How many atoms of hydrogen alr there in one molecule ofammonia, NHr?Berapakah atom hidrogen yog terdapat dalam suu molekal ammonia, NHI?

Which of the following are anions?Manakah antara beriha adalah anion?

A Li*,H*

Al3*, cr

G' , crzor'-

MnO+-, NHa*

Diagram 2 shows the elernents in the Periodic Table.Rajah 2 menunjuA:ftan unsar-unsur dalam Jadual Berksla

Diagram 2Which element is a halogen?Unsur manakah adalah suatu halogen?

c

D

APBaCRDS

H

N

I H

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4 What type of chemical bond exist in water, HzO ?

Apakah jenis ilmtan kimia yang wajud dalam air , H2a ?

A Covalent bondIkntan kovalen

B lonic bondIkatan ionik

C Metallic bondIfutan logam

D Single bondIkatan tunggal

Diagram 3 shows the apparatus set-up for an experiment.Rajah3 rnemnjukkan susururn radas untuk suatu ekspertmen

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AnodeAnd

CathodeKotod

ElectrolyteElektrolit

Diagram 3

Which ofthe following substances could be used as an electrolyte?Antara bahon yotg berilst, yang manakah boleh digunakan sebagai elektrcli{!

A Solid naphthalenePepejal nofialena

B Hydrochloric acidAsid hidroHorik

C Molten glucoseI*buran glukosa

D Pure ethanolEtmol nlen

6 Which of the following is true about an acid?Auara pernyataan berilal yang manaf,ah bewr tentang suatu asid ?

A An acid is not conosiveAsid tidak mengkakis

B A strong acid has a low pH valueAsid hnt memputyai nilai pHyang rendah

C A weak acid has a high degree of ionisationAsid lemah mempnyai kadar pengionanyemg tinggi

D An acid is a chEmical compound that is soluble in water to produce OH- ionAsid ialah sebdian kimia ywry lantt dalom air menghmilkan ion Abf

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III

IV

ABCD

Which of the following substances is a soluble salt?Aruara balnn berilwt , yang monakah goram terlarutkan ?

Sodium chloride, NaClNatrium Horida,NaClBarium sulphate, BaSO+Barium sulat, BaSOIPotassium nitrate, KNO3Kalium nitru, KNOrtf,ad 0I) carbonate, PbCO3P I u mb u m(Il) ka rb o nat, PbCOr

I and llI and tIIII and IIIII and IV

Diagram 4 shows a type of material used to make buildings.Rajah4 merunjukkan sejenis bahanyang untuk membina bangtnan

CementSimen

SteelwiresWayar keluli

Diagram 4

What arr the characteristics of the material?Apakah ciri<iri bahon tersebuf?

A High tensile snengthKe hratan re gang(m yang t inggi

B Hard and brittleKeras dan rapuh

C High boiling point and melting pointTakat didih dan takat lebur yang tingi

D Capable to conduct electricityKe bo le hm me ngla nduks i kan el e Hri k

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9 Which ofthe following explains the meaning of effective collision?Antqra berihtt, yang manakah mererangkan maksud perlanggaran berkesan?

A The coltision where its energy is less than the activation energJP erlanggaran yang mempwryai tenaga kurang daripada tenaga pengalctifan

B The collision that has a low energyPerlongaranyang mempunyat terurya yang rendah

C The collision which takes place before a reactionPerlangaranyang berlaka sebelum tindak balas

D The collision that causes a rcactionPerlanggaran yang menghasilkan tindak balas

l0 Which of the homologous series is a saturated hydrocarbon?Antara siri homolog berikat, yang manakah hidrokarbon tepu?

A AlcoholAlkohol

B AlkenesAlkena

C AlkanesAlkana

D Carboxylic acidAsid ksrbokcilik

11 The following information is about the effect of magnesium towards the rustingof iron.MaHumat berikut adalah tentang kesan magnesiarn terhadap pengaralan besi.

Magnesium that is in contact with iron will protect iron from rustingMagnesium yang bersennhan dengan besi aknn melindungi besi daripada berkarol

Which of the following explains the statement?Antara berihut, yang monakah merupakan perrersngan bagi pernyataan itu?

A Magnesium is softer than ironMagnesium lebih lembut doripada besi

B Magnesium is a good heat conducforMagnesium adalah kandufuor luboyang baik

C Magnesium has a lower melting pointMagnesium mempunyai nkat lebur yang lebih rendoh

D Magnesium is more tendency to release electronsMagnesium lehih cenderzng untuk membebaskon elelaron

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12 Which statement is correct about exothermic reaction?P e rny at asn m anakah y utg be t aI me nge nai I i ndak b a I ac e ks o t e rm i k ?

A The reaction absorbs heat from the surroundingTindah balas menyerap haba dari persekitaran

B The surrounding temperature decreasesSuhu pe rse kitaran rnenarun

C In this reaction, heat energy is converted to chemical energyDi dalam ttndak balas ini, terwga laba diubah kepada tenaga kimia.

D llhe products contain less enerry than the reactants

Hasil tindok balas mengandungi htrang tewrya daripada bahan tindak balas

13 Which of the following medicines is an antibiotic?Anara ubat berikul, yang manakah suatu antibiotiV?

A InsulinInsulin

B AspirinAspirin

C StreptomycinStreptomisin

D ParacetamolParasetamol

14 Diagram 5 shows the change of state of matter.Rajah 5 menunjukkan sata penrbalwn keadaanjirim.

Ice cube - Water.-_-..}Kiub ais Air

Diagram 5

What is the name of this process?

Apakah ruma proses yang terlibafl

A SublimationPemejalwapan

B BoilingPendidilnn

C FreezingPembehnn

D MeltingPeleburan

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15 firc molecular formula of hexene is CeHrz.Which of the following has the same empirical formula as hexene?Formula molehtl bagi hekseno adalah Cellrz.Ma*ah antara berifut mempunyaiformula empirikyang sama dengan heksena?

A CsHroB CsHrzC CeHo

D C6FI1a

16 Potassium is situated in the same group as sodium in the Periodic Table.Which of the following statements is true abut the element potassium?Kalium beroda di dalam htmpulot yang sama dengan ruilrium di dalamJahsl Berkala.Anlffo pernyalaon berihtt, yangmaru, benar ten angunsur kalium?

A Reacts with waler to produce acidic solutionBertindak balas dengan air menglnsilkan lanttan berasid.

B React with chlorine gas to produce a black solid.Bertirdok balas dengan gas Horin menglnsilkan Fpej al hitam.

C Potassium has several oxidation numbers.Kal ium me mpunyai be berapa wmbor pengo ksidaan

D Potassium has low melting point and boiling point.Kalium mempunyai takat lebur don takat didihyang rendah.

17 Which of the following are the properties of sodium oxide?Antara berihtt , yarg manakah sifu-sifu Mtium oksida?

I Low melting pointMempwryai takat lebur rendah

ll Insoluble in waterTidak urlarutkmt dalatn air

tII lnsoluble in organic solventTidak terlarutlwn dalanr pelarut organik

ry Decomposes to its constituent element by electrolysis in molten staleTerurai kepada unsur juzubtya melalui elektrolisis dalan bentuk leburan

A landllB IandIVC ll and tIID III and IV

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l8 Diagram 6 shows the apparatus set-up for an electrolyic cell.Rajah 6 menunjukkan susundn radas bagi sebuah sel elektrolisis.

Carbon electrodeElektrod karbon

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Carbon electrodeElehrod karbon

Copper(ll) sulphate solutionLaru t an kup ru m(ll) s u Ifu t

Diagram 6

Which of the following ions are atkacted to anods and cathode?Yang manakah antara ion-ion berilut tertarilc ke anod dan karcd ?

AnodeAnod

CathodeKolod

A SOa'- Cu'B Cu2* OHc SO,'-. 0H- Cu'-, Fl-D lu'-. H SO4'-, OH-

19 Which ofthe following is not a chemical properfy of acids?Antarayang berilcut, yang manakah bu*an sifat kimia bagi asid?

A Reacts with magnesium carbonate to produce salt, water and carbon dioxideBertindak balas dengan magrresium karbonat untuk menghasilkan garern, airdan karbon dioksida

B Reacts with copper metal to produce salt and hydrogen gas

Bertindak balas dengan logam kupram untuk menghasillean garam dan hidrogenC Reacts with zinc oxide to ploduce salt and water

Bertindalc balas &ngan zink oksido antuh menghasilkan garam dan airD Reacts with alkali to produce salt and water

Bertindak balas dengan alkali untuk menghasilkan garam dan air

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20 The following information shows the properties of salt X.MaHumat berikut menu4iukkan s@-sifct goramX.

Releases brown gas and a gas which tights up glowing splinter when heated

stronglyMembebasksn gos perang dot gas ytmg menyalakan kayu uji berbara apabiladipanaskan dengan lant

Residue after heating is brown when it is hot and yellow when it is coldBaki yang berwarna perang semasa panos dan hming semasa seiuk

What is salt X?Apakah garomX?

A Zinc nitrateZink nitrat

B Zinc carbonateZink karbonat

C Lead(II) nitratePlumbum(Il) nitrat

D Lead (II)carbonatePlumbum(ll) karbonat

Diagram 7 shows the arrangement$ of atoms in three substances.

RajahT menuniukkan susunun otorn-alom dalam tigaienis bahan-

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Arrange the substances fromSus un b afran- b ahan te rs e but

Diagram 7

the most ductile to the least ductile-dari paling mulur ke karang mulw.

A &P,QB P,R,Qc Q,P,RD Q,R,P

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22 The following equation shows the reaction between calcium carbonate, CaCO:and hydrochloric acid" HCl.Persomaan berikul menunjukkon tindak balas antarq serbuk kalsium karbonal,CaCOr dan a.sid hidroHorik, HCl.

CaCOn'y + ZHCl1"qy + CaClqay +COz@ + HzQu

Which of the following is the suitable method to determine the rate of rcaction?Antara yang berikut, yang nanakah merupakan lraedah yang sesuai urdukmeneuuksn kadar tindak bslas?

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

B Change in the volume ofcarbon dioxide gas with timePerubahan isipadu gas lmrbon dioksida dengan masa

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

D Change in the concrntration ofhydrochloric acid with timePerubahan kepekaton asid hidroHorik dengan rnasa

23 Alkane can bs produced from the hydrogenation of alkene.Name the catalyst used in this reaction.Alkana dapat dihasitkan daripado tindak balas penghidrogenan alkerwNarnakan mangfrinyang digunakan di dalam tindak balan ini.

A NickelNiksl

B Phosphoric acidAsidfosforik

C Sulphuric acidAsid sulfurik

D Aluminium oxideAluminium oksido

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24 Which of the following are oxidisingagents?Antora berilat yang nstahah agen pengoksidaon?

I MagnesiumMagnesium

il Chlorine waterAir Horin

til Potassium iodide solutionLarutan kalium iodida

ry Acidified potassium manganat{Vll) solutionLarutan kalium msngg@at (WI) berasid

A I and II onlyB lI and IV onlyC I,II and III onlyD I, II and IV only

25 The following equation shows the reaction between silver nitrate solution , AgNO3and sodium chloride solution, NaCl.Persamaan berihat mew4iuF,kan tindak bala.t antara lat*an argentum nitrd,AgNO3 dan larutan rwriun Horida,NaCl

AB],rOr (aq) + NaCl (aq) -.+ AgCl (s) + NaNQ (aq) AH:- 80.64 kJ mol-3

Which ofthe following is true ebout thc heat change and type ofreaction for&echemical equation?Antara berilad yang monakoh beno nengenai perubahan lwba danjenis tindokbalas bagi Wrsamcum kimia ini ?

Heat changePerubahsthaba

Type of reactionJenis tinda* balas

Heat is releasedHaba dibebaslwn

Endothermic

Heat is releasedHaba dibebaskmr

Exothermic

Heat is absorbedHaba disero Exothermic

Heat is absorHHaba diseran

Endothermic

26 Which quation rcpresents a rcaction of saponification?Persam.aan manakah tnewakili tindak balas saponifrkasi ?

A Acid + Alkali -+ salt + wsterAsid+Alkali+gwan+aii

B Alcohol + Carbo:rylic acid ---r ester + waterAlkolwl + Asid kobsilih+ ester * air

C Fats + Alkali -' Fatty acid salt + GlycerolLemak + Alkoli 4 garcm, asid lemak + gliserol

D Yeast + Glucose -'-r alcohol + carbon dioxideYis + Glukosa + alkolpl + kabon dioksida

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27 Tablc I shows the proton number and the number of electrons in four differentparticles. The letter used is not the asatral symbol of the elements.Jadual I merunjuk*antwmbor prolon dan bilangan elekron dolam empat zarah.

Hunrf yang digurukan bakan simbol yang sebens.

ElementUnsur

Proton numberNombor oroton

Number of electronBilansan elebron

P t7 t7

a t7 l8

R t2 t0

s 8 I

Table I

Which is an anion?Yang manakah suatu qion?

AP

BaCR

DS

28 Which substance contains the same number of atoms as in 12 g ofcarbon?

[Relative atomic mlss: He = 4, C = l2,O = l6n lfr/rg= 24, Al : 27, I mole ofanygas occupies 24 dm3 at room conditionJBalnn moukah mengandangi biloryan atam yang sama dengan 12 g karbon?

lJisim atomrelatif: He = 4, C: l2,A - 16, Mg *24, Al=27|

A 24 dm3 of helium gas24 dmi gas lretium

B 12 g of magnesium12 gmagnesium

C 16gofoxygen16 goksigen

D 54 g ofaluminium54 galuminiurn

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Zg Proton number of element Zis}}.Element T has the same chemical property as

element Z. Which of the following is the electron arrangement for atom fiNombor proton unsur Z ialah 20. Unsur T mempunyai sifat kimia yang sama

dengan i^u, Z. Manakah ontdro beribtt adalah susunan elektron bagi atomT ?

A2B 2.8

c 2.8.2

D 2.8.8

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30 Diagram I show the electron arrengement of elements X and Y.Rajah 8 di bawah memmiukkan Ewutl(m elektron bagi unsur x dany.

Diagram 8

Which of the fiollowing is true about the formula and type of bond formed by

elements X and Y?Antara berilrut yeng msnkah benar mengenai formula danienis ikatm yang terbenUk &ltara

unsurXdanY ?

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FormulaeFormula

Type ofbondJenis ikatan

A XY,lonic

B XzYIonic

c XYCovalent

D XYzCovalent

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3l Diagram 9 shows the apparatus set-up used to elechoplate iron spoon with silver.Rajah 9 menunjukkan susunan radas untuk menyadur sudu besi dengan orgentum.

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Iron spoonSudu besi

What is observed at the anode and cathode after 30 minutes?Apakah pemerlwtian di anod dan di tatad selepas 30 minit?

Alkali Y of concentration I mol dm-3 has a pH of 8.

Which statement is true abut alkali Y?Atkati Y dengan kepekatan I mol dm'3 m empunyai pH 8.

Pernyataan manahah yang benar tentong alkali Y2

I lnsoluble in waterTidsklsut dalamair

il Reacs with a weak acidBertindak balas dengan asid lemah

ru The degree of ionisation in water is higlrDarjah pengionan dalam air adalah tinggi

ry Has a low concentralion of hydroxide ionsMempurzyai kepfutan ion hi&oksidayang rendoh

I and IIII and IIII and tVII and IV

Silver ptrate

Plat argentum

Silver nitrate solutionLtutqn argentum nitral

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Diagram 9

AnodeAnod

CathodeKatod

A Silver plate becomes thinnerPlat arsentum semakin niois

Silvery deposit fonnedMendakan berwarna perak terbewuk

B Silvery deposit formedMendakon berw arna perak

terbentuk

Gas bubbles releasedGelembung gas terbebas

C Silver plate becomes thinnerPlat arsentum semakin nipis

Cas bubbles releasedGelembuns sas terbebas

D Gas bubbles releasedGelembuns sas terbebas

Gas bubbles releasedGelembuns. src terbebos

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33 L)iagranr l0 shows some reastion of zinc compounds.Which changes is made by adding an acid?Rajah lA menwjukkan sebahogian tirdak balas ymg melibatkan sebatian zinkAntara perubahan lersebut yang manakah berlafu dengat penanbahan asid 2 '

Zinc carbonateZink karbonat

Zinc oxideZink oksida

A UreaUrea

Zinc sulphateZink sulfat

)--.

Diagram 10

34 The fcllowing equation is a reaction to prepare a synthethic fertilissr, Z.

Persamasn beriktt adatah tindakbslas untuk menyediafum baja sintelih Z.

Ammonia +Y + Z

Which ofthe following is Y?Manakah antara berikut adalahY?

B Nitric acidAsid nitric

C Ammonium nitrateAmmonium nitat

D Ammonium hydroxideAmmonium hidroksida

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35 In an experiment,25 cm3 of 0.2 mol dm-3 hydrogen peroxide solutiondecomposes to produce oxygen gas. Graph of volume of oxygen gas against timeis sketched and curve R is obtained as shown in Diagram I IDalam satu eksperimen, 25 cm3 0.2 mol dm'3 larutan hidrogm peroluida teruraimenghasilkan gos olcsigen. Graf isipadu gas oksigen melmsan masa dilakarkan danlenglangR terhasil seperti ditunjukkan dalarn Rajah ll

Volume of oxygen gaV cm3kipadu gas oksigen / cm3

Time/ sMasal s

Diagram I I

Which ofthe following solution will produce curve S?Yang manakah di antara larutan herika okan menghasilkan lengkung S?

A 20 cm3 0.1 mol dm-3

20 cm3 0.1 mol dm-3

B 30 cm3 0.2 mol drn-3

30 cm3 0.2 mol dm'3

c 20 cm3 0.3 mol dm-320 cm3 0.3 mol dm-3

D l0 cm3 0.3 mol dmjlo cm3 0.3 mol dm-3

hydrogen peroxidehidragen peroksida

hydrogen peroxidehidrogen peroksida



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36 Ester is a carbon compound that can be derived from the reaction between alcohol andcarboxylic acid. Diagram 12 shows the structure of an ester.Ester ialah satu sebatior karbon yang diterbitkan dtrii;da tindak balas antara alkphol danasid karholsilik. Rajah 12 menunjukkan struktur suatu ester.

oil

CHr-CHz-C-O-CHg

Diagnm 12

Which of the alcohol and carboxylic acid used to form the ester?Yang manakah allcohal dan asid karboksilik yang digunolmn bagi membentuk ester inr2

AlcoholAlcohol

Carboxylic AcidAsid korbosilik

A MethanolMetanol

Ethanoic AcidAsid etanoik

B EthanolEtanal

Ethanoic acidAsid Etonoik

c EthanolEtarai

Propanoic acidAsid Propanoik

D MethanolMetanal

Propanoic acidAsid Propanoik

37 Diagram 13 shows the set up of the apparatus of a simple chemical cell.Rajoh 13 menunjukkan susurwn radas bogi sotu sel kimia ringkas.

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Zinc platePIat zink

Silver plarePlat argentum

Silver nitrate solutionLorutan argentum nitral

Diagram 13

Which half equations represent rcaction @curs at silver plate?

Antara berikut, setengah per.iamctan manakah mewakili tindak balas yongberlaku di kepingan argentum?

A Zn --) Znzn + 2e

BAg --+ Ag* +e

C Ag*+ e -' Ag

D 2H* + 2e ; Hz

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33 Hot packs contain chemicals that react to produce heat.

Which substance is used in hot packs?

Pek parws mengandungi bahan kimia yang bertindah balas untuk membebaskan

haba.Bahon manakahycng digunakan dalam pek panas?

A Sodium carbonateNatium karbonat

B Ammonium nitrateAmmonium nitrat

Magnesium sulphateMagnesiumsulfut

Calsium carbonateKalsium ksrbonat

39 Which of the following is aot true about soap?Antarc yang berikut, yang manakah ldok benar tentang sabun?

A Soap forms when fats react with an alkaliSabun terbentuk apabila lemak bertindak balas dengan alkoli

B Soap forms scum in soft waterSabun membentuk kekat dengan air lembul

C Scum decreases the effectiveness of the cleansing action of a soap

Kekat mengarangkan keberkcsanon tindakan peneucian sahun

D The presence of magnesium ions and calcium ions in soap forms scumsKehadiran ion magrcsium dan ion kalsium dalam sabun menghasilkan kekat

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40 Table 2 shows the subatomic particles of P and Q.Jadual2 menu4jukhan zarah-zarah subatom bagi P danQ

Neutron ProtonP 6 5

a 5 5

Table2

It shows that P and QIni menunjuk*an? danQ

I are both positively chargedacblah bercas po,ritif

II have the same nusleon numbermempunyai nombor rruHeonyang sama

Iil have the same number of elechonsmempunyai bilangan elektran yang sama

IV are particles of the same elementsadalah unsur yang sama

A I and II onlyB II and III onlyC II and lV onlyD III and IV only

4l The following equation shows the reaction between magnesium and hydrochloricacid.Persamaan berikut menunjukkan tindak balas antara magnesium fun asidhidroHorilc

M&rl + 2HCl tuql ) MgCl2("ol + HzGl

What is the volume of hydrogetr gff, H2 prroduced if 0.05 mol of hydrochloricacid rpact with excess magnesium ribbon at standard temperature and pressurc

(srP)?[Molar volume of gas at STP :22.4 dm3mol-r]

Apakah isipadu gas hidrogen,H2 yang terhasil jika 0.05 mol asid hidroHorikbertindakbalas dengan pita magnesium berlebilnn pada suha dan tekanqtpiawai (STP)?

lMolar volune of gas at STP :22.4 dm3 mol-r]

A 56 cm3

B 60 cm3C l12cm3D 120 cm3

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42 Gas X is used in airships and weather balloons because of its low density.Gas X isGas X diganakan dala n kapal udara dan belon kajicuaca disebabkan ketumpatannyayang rendah. Gas Xadalah

A HeliumB NeonC ArgonD Krypton

43 The following equation shows the formation of magnesium oxide.Persamaan berikut men unj ukkan pem bentukan magnesi um oksida.

2Mg '1Oz * 2MgO

What is the relative formula mass ofthe compound, magnesium oxide?Apakah jisim formula relatd bagi sebatiut magnesium oksida tersebut ?

[Relative atomic mass : Mg=24; O :16]

U Table 3 shows information about two voltaic cells.Jadual 3 memmjufr*an maHumat tentang dua sel kimia .

Table 3

What is the potential diflbrence between metal Q and R?Apafra], bezo kcupayaan di urtara logatn Q danR?

A 0.97 V

B 2.t4Y

c 2.23 V

D 2.67 V

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^A. 4A832c24D16

Pairs of metalPasangan logom

Potential difference / VBeza keupoyaan/Y

Negative terminalTerminol negatif

Q and Copper

Qdan Kuprum t.7a aR and CopperRdan Kuprum 0.53 Cu

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45 The equation shows the reaction between sulphuric acid and potassium hydroxide.Persanaan di bawah menunjuft:lcon tindafi:balas antara asid sulfurik dan kaliumhidroksida.

HISO* + 2KOH -'* trGSOr + 2I12O

What is the volume of 0.1 mol dmi potassium hydroxide solution which canneutralise 20.0 cm3 of 0.1 mol dm-3 sulphuric acid?Berqakah isipadu larutan kalium hidroksida 0.i mol dm'3 yang diperlakan unnkmeneutralkar 20.0 cm3 0.1 mol dn-3 asid sutfurik'l

A 10.0 cm3

B 20.0 cm3

C 40.0 cm3

D 80.0 cm3

46 The following equation shows a double decomposition reaction.Persamaan berikut menunjuk*an tindak balas pengwaian ganda dua.

Pb{NO3)2 + 2KI --' PbI2 + 2KNO3

The ionic equation for this reaction isPersonaan ion untuk tindak balas ini adalah

A Pb 2* + l- --+ PbI:B Pb2* + 2l' -' PblzC K* +NOr'---'KNO:D 2K * + No3- --* 2KNor

47 A compound FeXs is formed from the reaction between 0.1 mol of iron and10.65 g of element X.What is the relative atomic mass of element X?[Relative atomic mass : Fe:56]Suau sebaticm FeX3 terbentuk dori tindakbalas antara 0.1mol besi dengan 1A.65 gunsur XApakahjisim atom relatf bagi unsurX?frJisim atom relatif : Fe = 56J

A 35.5B 35.0c 32.5D 32.A

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48 Table 3 shows the total volume of gas collected at regular intervals in a reaction.Jadud 3 menuniukkan jumlah isipadu gas yang dikumpul pada sela masayang sekatadalam suatu tindak balas.

Time/ sMasa/ s

0 30 60 90 t2a r50 180 zta

Total volume ofgaV cm'Jamlah isipadu gas/ cm3

0 2.A 3.7 <) 6.4 7.3 8.6 8.5

Table 3

What is the average rate of reaction in the second minute?Berapakah kadar tindak balas purata dalmn minit kedudl

A 0.040 cm3s-'

B 0.045 cm's-t

C 0.053 cm3s-r

D 0.O62cm's-r

49 A glass of wine becomes acidic if it is left in the air in certain time.Which of the following equation reprcsents these changes?Segelas wain bertukar menjadi berasid apabila ditinggalkan untilk beherapa kettkaAntra persamaan berikat yang manakah mewabli perubalun infl

A 2C:HsOH + 2COz ---+ 2CzHsCOOH + 02

B CzllsOH + 3Q ZCAz + 3HzO

C CzHsOH + Oz --------) CHICOOH + HzO

D CzHsOH + CO ------| CzHsCOOH

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50 Diagram 15 shows the apparatus set-up to investigate a redox reaction.Rajah 15 menunjukkot su;uwu radas untukmengkaji satu tindakbalas redoks.

gradute elactrodeelck*td karbon

X soLd:nIarlatart]{

24 434ut

Dilute su$hric acid

Asrd su{ur* catr

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U- tubenub U

Diagram 15

The colourless potassium iodide solution becomes a brownWhich of the following is X solution?Larutan kalium idida tanpa wama menjadi loutan perang.Antara berikut, yangmanakah larutanX?

A Chlorine waterAir klorin

Iron(II) sulphateFerum(ll) sulfar

Hydrogen sulphideHidrogen sulJida

Sodium chlorideNatrium Horida

QUESTTONS END FIERE

solution.

B

C

D

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PROGRAM PENINGKATAN PRESTASI AKADEMIK SPMTAHUN 2012

PERATURAN PEMARKAHAN

CHEMISTRYPAPER MARKSPaper 1 50Paper 2 100Paper 3 50

Total 200

Jumlah markah diskalakan kepada 100%

CHEMISTRYPaper 1

1 B 26 C2 C 27 B3 D 28 A4 A 29 C5 B 30 D6 B 31 A7 B 32 D8 A 33 D9 D 34 B

10 C 35 D11 D 36 D12 D 37 C13 C 38 C14 D 39 B15 A 40 D16 D 41 A17 D 42 A18 C 43 A19 B 44 C20 C 45 C21 A 46 B22 B 47 A23 A 48 B24 B 49 C25 B 50 A

A = 12 ; B = 13 ; C = 12 ; D = 13

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Nama: Tingkatan:

PENINGKATAN PRESTASI AKADEMIKSPM

PROGRAM

CHEMISTRY

Paper 2Two hours and thirty minutes

JANGAN BUI(A KERTAS SOATAN INI SEHINGGA DIBERITAHU

1.

2.

Kertas soalan ini adalah dalam dwibahasa.

Soalan dalam Eahasa lnggeris mendahuluisoalan yang sepadan dalam Bahasa

Melayu.

Calon dibenarkan menjawab keseluruhanatau sebahagian soalan sama ada dalamBahasa lnggeris atau Bahasa Melayu.

Calon dikehendaki membaca maklumat dihalaman belakang kertas soalan ini.

Untuk Kegunaan Pemeriksa

Bahagian SoalanMarkahPenuh

MarkahDioeroleh

A

1 10

2 10

3 10

4 10

5 10

6 10

B7 20

8 20

c9 20

10 20

Jumlah

4.

Asiln

Kertas soalan inimengandungi 27 halaman bercetak

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INFORJ}'ATION FOR CA}I DI DATESMAKLUMAT UNTUKCALON

l. This question paper consists of three sections: Sections A, B and C.Kertas soalan tni mengandmgi tiga bahagian: Bohaglan A,B dan C.

2. Answer all guestions in Section ,A,. Write your answers for Section A in the spacesprovided in the question paper.

Jaw ab semua soalan dalam Bahagian A. Tul iskan j aw apan 6agz Sahegi an A da lamrucng yang disediakan dalam kertas soalan

3. Answer one question from Section B and one question *om Section C.Write your answers for Section B and Section C on the 'writing paper' providd by theinvigilaton.Answer questions in Section B and Section C in detail.You may use equations, diagrams, tables, graphs and other suitable methods to explainyour answer.Jswab sttu soalan daripada Bahagian B dan satu soslan dcripda Bahagian C.Tuliskan juwapan bagi Bahagian B dan Br.hagitn C pada haloman bergaris dibahagian akhir kertas soalan ini. Jawob Bahagian BdanBlthrgianC dengonterperinci. Anda boleh menggunakan perserrnean, gambar rqiah, jadual, grof dan caralain yang sesuni untuk menjelasktn jawapan anda

4- Show your working. It may help you to get marks.Tunjull<an kerja mengira.Ini membantu anda mendapatkan markah.

5. If you wish to change your answer, neatly cross out the answer that you have done. T?renwrite down the newanswer.Sekiranya anda hendak membatalkon sesuatu jswapan, buat garisan di atas jawapan itu.

6. The diagrams in the questions ar€ not drawn to scale unless stated.Rajah yang mengiringi soalcn tidak diluhisksn mengikut skala kecaali dinyatakan

7. Marks allocated for each question or part question are shown in hackets.Markah yang dipenmakkan bagi setiap soalan atau cetaian saalan ditunjui*an dalamkurungan

B. The time suggested to answer Section A is 90 minutesn Section B is 30 minutes andSection C is 30 minutes.Masa yang dicadangkan untuk menjawcb Bahagian L ialah 90 minit, Bahagien B ialah3O minit &tn Bahagian C ialah 30 minir

9. You may use a non-programmable scientific calculalorAnda dibenarkan mengunakan kalkulator saintifkyang tidak baleh diprogramkan.

10. Hand in your answer sheets a the end of the examination.Serahkan semuo kertas jawapan anda di akhir peperikaan

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Section A16A marksl

Answer all'questions in tlris sectionJowob sernufr soalan dalam hahagian ini.

Figure I show the electron arrangetnent of three atoms of elernents P, Q and RRajah I menunjuk*an susunan eleloron bagi tiga atom unsw P,Qdan R

Figure I

(a) Write the electron &rangement for the atoms of element R.Tuliskan susunctn elektron bagi atom unsur R.

{l markl

(b) Identify the position of element QKenol pasti kedudukan unsur Q.

{l mark}

(c) (i) Which element is chemically inert?Unsur yang manakah lengai dari segi kimia?

ll markl

(ii) Give one reason for the answer in c (i)Beri satu sebab bagi jawapan di c (i)

ll narkl

(d) Element Q dissolves in waterto form an acid and a strCIng bleaching agent.Write the chemical formulae of the bleaching agent.(Insur Q larut dalam air untuk membentuk satu asid dan satu agen pelwnr yang huu.Tuliskan formula kinia bagi ogen pelunhr ltu.

U markj

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(e) Another element S has a proton number of 9.V/hich element shows similar chemical properties to element S?Uwur Inin, S mempunyai nombor proton9.Unsw yang manakah menunjuldran sifat kimia yang scna dengan unsur S7

$ mark\

(g (i) Which element. react vigorously with water?Urcur yong manoftah benindak balas dengan cergcw dengan air?

$ nar*l

(ii) Based on the answer in (i) ,write the chemical equation for the reaction"Berdasarlcon jawapan di fii) ,tulislnn perscrrflaan Hmia bagi tindak balas itu.

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(g) Arrange the atomic size ofelements P, Q and R starting from the smallest.Sustmkon saiz atom unsur P,Q den R bermula daripada yang paling kecil-

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t Diagram 2 shows an experiment !o dctermine the empirical formula of copper (It) oxide.Rajah 2 menunjulr.kan satu ekperimen antuk menmtr*anfornula empirik kuprum(ll\ obida.

Combustion tubeTabung pembakaran

Coppe(Il) oxideKupnn(II) oksida

'Hydrogen flameNyalaan hidrogen

Dry hydrogen gas \Gas hidrogen kering-

HeatPonaskon

Diagram 2

(a) What is meant by empirical formula?Apakah yang dimoksttdlcan dengot formula empiri k 2

fi nnrkl

(b) Before copper(Il) oxide powder is heate{ dry hydnrgen gas is flowed through thecombustion tub for a while. Why?Sebelum serbuk hpram(ll) okida dipouskan, gas hidrogen kering dialirlcan melalut tiubpembakoran seloma beboapa ketiha. Mengapa?

ll markl

(c) State the observation that happens to copper(Il) oxide after heating.Nyatukan pemerhaticn lang berlahu kepada kuprun(Il) akida selepas pemanosun.

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(d) Table 2 shows the result obtained in tfte experiment:Jadaat 2 menunjrkkan keputusan yang diperolehi dalam eksperimen di atos :

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Mass of combustion tube + asbestos paperJisim tiub pembakaran * kertas asbestos

58.36 g

Mass of combustion tube + asbestcs paper + coppe(ll) oxideJisim tiab nembalcaren + kertas asbestos+ fuprw(ll\ olsida

91.95 g

Mass of cornbustion tub€ + asbestos paper + copperJisim tiub oembakaran + kertas asbestos* kuprwn

85.2a g

Table 2

(i) Based on Table 2,Berdosarkan Jadual 2,

Calculate the mass of copp€r and the mass of oxygen that have reacted.Hitungkan jisim kuprum dan jisim oksigen yang telah bertindak balas.

Mass of copper :

Jisim kuprum:

Mass of oxygen :

Jisim oksigen:Ll markl

(ii) Calculate the ratio of moles of copp€r atoms to oxygsn atoms.Hitungktn nisbah mol bagi atom kuprum kepada atom oksigen.

I Relative atomic mass /Jisim atam relatd:0 = 16 ; Cu:64 ]

12 marks]

(iii) Determine the empirical formula of copper (II) oxide.Tentuksnformula empirift kuprum (Il) oksida-

fl narkl

(iv) Write the chemical equation for the reaction in the experiment.Tulis persamaan bimia bagi tindakbalas dalau eksperimen tersebut'

[2 narksl

(v) This method is not suitable to determine the empirical formula of magnesium oxide.whv?Kaedoh ini tidak sesusi untwk menentukanformula empirik bagi magnesium olcsida.

Kenapa?

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Reaction RTinda*balasR

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Ammonium sulPhateAmmonium sulf*

(NH4hSO4

p and e are industrial processes to manufrcture sulphuric acid and ammonia respectively'

Sufptrgic acid and ammonia are usd to manufacture ammonium sulphate as shown in

Diagram 3.1p ian Q adalah proses-proses indttspi untuk menghasilkan asid salfwik don anmonia maslng'

masiing.)"sid sutfurik ioi *rirni" digwahan rmtik mengftasilkan ammcnium sulfat seperti dala*t

Rajah3.l

Diasram 3.1

(a)NameNamakan

Process P:Proses P

(i)

{ii} Process QProses Q

12 marksl

{b) State one raw material needed for procsss Q?Nyvtakon satu bahan mennh yang dtperlukan mtuk proses Q?

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(c) (i) Write a balanced chemical equation for reaction R

Tulis persamaan Hmia yang seimbang bagi tindak balas R

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State one use of ammonium sulphateNyatakan satu kegunaan ammonium sulfat

ll mark\(iii) Calculate the percentage of nitrogen by mass in ammonium sulphate

Hi tung pe ratus nitrogen mengikut j is im bagi amnonium sulfat.

I Relative atomic mass / Jisim stom relatif: N : 14 ; O : 16; S = 32; H = I J

f 2 nartcl

Diagram 3.2 shows the structuralformula of the polymer polyvinyl chlorideRajah 32 menunjuk*anformula struktur bagi polimer polivinil Horida

HCI

C

I

H

Diagram 3.2

Draw the structural formula for its monornerLuVsformula struhur bagi monomer polimer tersebut

I I nark]The use of synthetic polyrners extensively in our daily life has become an issueof environmental pol lution.Penggunaan poliwer sintetik secara berlebihan didalom kehidupan seharian telahmenjadi isu kepada pencemaran alam sekitar.

Give one method to overcome this problem.Berikan salu kaedah untuk mengatasi masalah ini

I lmark 1

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(d)

I

H

{e)

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Diagram 4.I and 4.2 shows a set up apparatus to investigate the role of water for acid toshow its acidic properties.Rojah 4.1 ond 4.2 menunjukkan radas wuk menglaji peranan air untuk asid menuniukJan sdatkeasidannya.

Dry hydrogen chloride gas

Gas hidrogen Horida kcrW

MethylbenzeneMetilbewena

Diagram 4.1

Dry hydrogen chloride gas

Gas hidrogen Horida kcring

WaterAir

Diagram 4.2

(a) Write the chemical formula of hydrogen chloride .

Tulisformula kimia hagi hidrogen Horida

ll markl

(b) (i) Dry hydrogen chloride gas is bubbled in methylbernene for 5 minutes as

shown in Diagram 4.1, then tssted with a piece of blue litrnus pap€r.

State the observation.Gas hidrogen Horida kertng dialirkan masuk dalam metilbewena selama 5 minitseperti yang ditunjuW@n dalam Rnjah 4.1, kemudian diuji dengan sekeping kertasIitmus b iru. Nyatakan pemerhatian.

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(ii) Explain your answer in b(i)Jelaskan jawapan anda dalamVi)

{2 marksl

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(c) Diagram 4.2 shows dry hydrrrgen chloride gas bubbled into water for 5 minutes.The solution is then divided into two parts, Part I and Parf II.Table 4 shows the observations of the two tests conducted on the two parts.Rajah 4.2 menunjukkan gas hidrogen Horida kering dialirtan masuk dalam air selama 5minit . Larutan itu dibahagikan lepada dua bahagian, Bahogianl dan Bahoglaull.Jadual 4 mentnjulckan pemerhatian bagi dua ujian yang dijalankan ke atas duobahagian ita.

PartBahagian

TestUjian

ObseivationPemcrhorian

I Add magnesium carbonate.Testgas given off with lime waterTambahkon m agn e s i*n karbonat.Uji gas yang terbebas dengon air kapw

EffervescencePembuakanLime water turns chalkyAir kapur menjadi luruh

II Add magnesium ribbon.Test gas given offby pufting inlighted wooden spl interTambahkan pit a ma gn es i wn.Uji gas terhasil dengan memasukkanIrayuuji menyala

Table 4(i) State the role of water that caused the produced gas turns lime water chalky.

Nyatakan peranan air yang menyebabkan penghasilan gas yang menukarkan airkapur menjadi keruh.

$ mar*l

(ii) Write an ionic equation to the repr€s€nt the production of gas in Part ITulis persamaan ion unuk mewakili penghasilan gas dalam Bahagian I

12 nnks]

(iii) Complete the observations in Table 4.Lengkapkan pemerhatian dalom Jadual 4

[2 marksl

(iv) What is the conclusion drawn from the observation in both part?Apakah kesimpulan yong boleh dibuat daripada pemerhatian dalom keduoduobahagian.2

t0

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5 Diagram 5 shows the flow chart for dte reaction of propan-l-ol.Rajah 5 menunjukkan carta alir bagi tindak balas propan-l- ol .

Compound XSebatian X

Reaction ITindak balorl

alumina

HeatedPanaskan

HHHtll

H-C-C-C-OHtrlHHII

Propan-l-ol

Reaction IITindalc balasll

AcidifiedKMnOe

-------------*KMnOtberasid

Reaction III l+ CH3COOHfindakbala-sfit

f + HzSOa

Compound ZSebatian Z

Diagrarn 5

(a) State the molecular formula of propan-l-ol.Nyatakanforrmrla molehi bagi propan-l- ol.

U ma*l

(b) The following equation shows complete combustion of propan-l-ol.Persamaan berilat memrnjuklmn pembakarorc lengkap propan-l -ol.

C3H7OH + 9O2 -*+ 3COz + 4H2O2

Calculate the volurne ofcarbon dioxide gas produced if 0.1 mol of propan-l-ol is bumtcompletely in air.Ilinmgkan isipadu gas karbon dioksida yang terhasil jika A.l mol propan-l-al dibakar denganIengkap dalam udara.

[Molar volume :24 dm3 mol-l at room condition]

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Compound YSebatianY

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(c) Compound X is an unsaturatcd hydrocarbon.SebatianX adalah hidrokarbon tery.

(i) What is the meaning of hydrocarbon?Apakah yang dimaksudkm dengan hidrokarbon?

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(ii) Complete the following diagram to collect compound X in reaction I.Lengkapkan rajah berihtt unluk mengutip sebatian X dalam ttudak balas l.

Alumina

12 marksJ(d) hopan-lol is addsd with acidified potassium marganate (VIt) solution and heated in

reaction II.Propn-l- oI ditambahhan dengan larutan kaliun mangout (Yl7) berasid dan dipanaskan dalantindak balas lL

(i) What is the name of reaction II?Apakah nans tindak bolas ll?

$ marklName compound Y.Namakan sebatian Y.

twarrn

(ii)

hopan-l-ol soakedwith glass wool

l1 markl

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(e) Compound Zhas the following properties:

. SebatUn Z mempnyai stfat-stfat beri*at :

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o Float on waterTerapwg otas oir

r Fruity smellYangi bwh-buahan

(i) Draw the sfuctural formula of oompound Z.L*is formula smrkur bagi sebatian Z.

$ mnkl(ii) Concer*rated sulphuric acid is added in reaction lll.

Explain why?Asid sulfurik pelcat ditambah dalmt tindak balas lll .

Teranglan mengapa?

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6 (a) Table 6 shows the result ofan experimcnt to study the cffet oftemperafure on the rate ofrection between 50 cm3 1.0 mol dm-3hydrochloric acid solution, HCI and 50 cm3

0.2 mol dm-3 sodium thiozulphate soluticiq NazSzOr.Jdual 6 memmjuk*an kepr.hrsan bagi satu elrspeimen unn* menglraji kesan guhu kcatas kadartindakbalas *i*o 50 cm3 1.0 mol dmo t*uton asid sulfarih HzSOr dan 5A enf 0.2 mol &n'3lorutan natlium tiosulfat, NazSzQ.

TemperaturefCSuhufC

30 35 40 45 50

Timc taken for'X' mark to disappear fronr sightMasa tanda X' hilansdari pandoutt 94.8 49.9 36.1 25.2 19.8

Table 6

(a) Balanced the ctremical equmion below for the reaction that occurs in this erperimenL&imbangk*t percomaail kimia dibov,ah bagi tindakbalas yang berlaht dqlan ekprimen ini.

mHCl+Na2S2O3t nNaCl+HzO + Soz+ S

m=

TI:

{2 narksl

(b) Draw the set-up of apparatus used to measure the time taken for 'X' mark to disappearfrom sight.Lakis*an susunan radas yng digwakan untuk mengalatr maso tanda'X' hilang dti

Q marksl

(c) Name the substance that is responsible for'X' mark to disappear from sight.Nama*mt bahan yvng menyebablcan tanda X' hilang dari pandangan-

fi markl

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(d) 'Flot a graph of temperature against time taken for'X' mark to disappear from sight.I^akarkan graf suhu melasan masa tando'X' hilotg doi padmgan

14 mc:ksl

(e) Based on the graph in (d), sbte the relationship between temperature and time.Berdasarkon graf pada (d), nyatakm hubwgan qntara $rtu dan masa.

lt mrkl

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Section B[20 rzr:ksl

Answer any one question.Javtab m(rnt -rnsna sala soolan.

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1 Table 7 shows the proton numberofatom P, Q, Rand S.

The letters used do not represent the actual symbols of the atoms.Jadual T mmwJulikan nombor proton untuk atom P, Q, R dcr S.

Hun{yng diganakan tidak mewakili simbol sebens atom berkenaan.

Atom

AtomP a R s

Proton Number

Nombor protont7 12 8 6

Table 7

{a) , Write the electron arrangement for the atom of element QDetermine the group for element QTalis susunan elekron bagi atom rrrrrQ.Tentufun funpulan untuk msw Q.

pnarksl

O) (i) Basd on Table 7, sel*t two differpnt elemen8 that can form ionic compound.Berdasarkan Jaduol T, pilih dua unsur Malnan yang akan membentuk sebation ion.

ll nokl

(ii) Draw a diagram to show the compound tlrat will be formed in 7(b) (i)Lulris rajah untuk menunjul*an sebatiot yang terbentulc di 7(b) (i)

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(c) Diagrarn 7 shows the molecule of carbon dioxide. The bond formed between carbon atomand oxygen atom are double covalent bond.Rajah 7 menunjuk*an molekul karbon dlokida. Ikatanyang terbentuk antara atomIurbon dan atom olsigen ialah ilcatan kovalen ganda dua.

18

Dagram 7

Explain the formation of this compouod in terms of :

o Electron arrangementr Electrons involvedo Particles involvod

[Proton number :C:6, O: 8 J

Terangkan tentang pembmwkan sebatian ini dari segi:. Susunan elehront Elektron yang terlibato Zaroh-zorahyangterlibat.

15 narksl

(d) Compare the physical propcrties benpeen ionic compound and covalent compound.Your answer should consist of the following :

o Physical properties in roorn conditionso Melting point and boiling pointo Electricalconductivityr Solubility in water and organic solvento Example ofcompound

Bandingkan sifat*ifutfizikal di utoa sebatian ion don sebatian kovalen.Dalamjawopan ando, perlu mengan&ngi perkara bertlatt :

o Keadaon jirim pada kzadaan bilik"t Taknt lebw dan takst didiht Kekonduksiot elekriko Keterlanttan dalan air dan sebatian organico Contoh sebatian

$0 marksl

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Carbon electrode XElel*rod karbonX

19

concentrated coppe(I I)chloride solutionI arut an hprum{ll). kl or i da

Wlcat

Carbon elrctrode YEtefuod korbonY

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Diagram 8.1 shows the apparatus set-up for the electrolysis of concentrated copper (II) chloride

solution, 0.1 mol dm-' using carbon electrodes.

Rajah 8.1 menunjulkan susur'rcm radcn untuk me4jalankan elekrolisis larutan larprum(ll) Hiridape kat, 0. l mol dm'

t me ngunokan ele ldrod-e lektrod knrbon.

(a)

(b)

Diagram 8.1

Based on Diagram 8.1, sbte the factors that determine the products formed at

electrode X and elwtode Y.

Berdasarkan Rajah 8.1, nyatakanfakor-fahor yang menentufran hasil yang terbennk pada

elebrodXdan elekrodY..12, morksl

Explain the reactions at electrodes, X and Y. Include the following in yourexplanation:

Terangkan tindak batas pada elektod,X dan Y. Penerangan anda perla m

r List the ions atttracted to each of elecfode, X and Y

Senaraikan ion-ion yang tertarik ke setiap elekrad, X dan Y

r Name of the ions selectively discharged at each elechode

Nams ian'ian yang dipilih wuk dinyahcas di setiap elekrdr The reason why the ions are selectively discharged

Sebab ion-ion ini dipilih unuk dinyahcas

. Half equations for each reaction

Setengah persomaan bagi setiap tindak balas

o The observable changes ofthe solutionPerubahan yang diperhatikon pada lanttan

fiO mrksl

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4541n SULIT

(c) Table I shows the incomplete results of a series ofexperiments carried out to' c,onsmrct the electrochemical series of metals.W, X and Y are not the actual symbols of the metals.

Jadwl I mmunjal4ran keputusan yang tidak lenglrap bagi satu siri eksperlmen yang telahdijalanlwn antukmembina sin elebrokimia bagi logun.W, XdanY bulcan simbol sebenar logam-Iogam itu.

Pairs of metalsPasangan lagan

Positive terminalTerminal positif

Potential difference/ VBeza keupayaan

W' Copper Copper 3.1

X,Y Y 0.3

wx X t.8

X, Copper

Table 8

(i) Based on the values ofthe potential differences, arrange the metals in descendingorder in the elecbochemical series.

Berdasarkan niloi beza keupcyaan, susun logam-logan tersebut dalam tertibmenuntn dalam siri elekrokimia.

lt ndf,

(iD Predict the positive terminal and the value of potential difflerence for the pair ofmetals X and Cu.Explain your answer.

Ramulkan terminal positif dan nilai heza bagf pasangan logom X dan C*Jeloskan jawapan anda.

t3 markd

[Lihat sebelabST'LIT

20

4541n

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Cu

Copper${) nitrateKaprum(ll) nitrut

SULIT

[Lih*t sebelahSULIT

(d) Diagram 8.2 shows a voltaic cell. Metal Q is situated below copper in the

e leitroch em i stry series.Rajah 8.7 menunjakkan saaru sel voltan. Lagam Q terletak di hawah kuprum dalam siri

elelctrokimia.

Metal QLogam Q

Solution RLarutqnR

Diagram 8.2

State the positive terminal and the negative lerminal ofthis cell-

Suggest a metal that is suitable * m"tal Q and a solution that is suitable as solution

R.

Nyatalan terminal posilif dan tenninal negatif bagi sel ini'

iaaanske, togam yani sesaai sebagai ligam Q dan larutan yang sesuai sebagai larutan k

14 narksl

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Section C[2A marks]

Answer any one qrsstion.Jawab masra-mana satu soalan,

9 Table 9 shows the heat of displacement of hvo diffe,rent metals P and Q withcopper (II) sulphate solution.Jadual 9 menrmju?Jran luba penysarm bagi dua logam yong berlainan, P danQdengan larut ot kuprunt{ll) s u lfat.

(a) Based on the information in Table 9,(i) State one exanple which could be metal P and one ex{rmple which could be metai Q.

Berdasarksn maftlunat dalam Ja&*al 9,

Nyatalam ssta c{}ntoh ymg mwgkin bagi logrnnP dffi sdu contoh yang mungkin bagilogamQ.

[2 marksl

(ii) Explain why there is a difference in the values of the heat of displacement.Jelaskon mengapa terdaryt perbezool nilai lwba penyesran itu.

[4 marksl

O) Calculate the change in temperature of the rnixture in experiment I.

{Specific heat capacity of solution: 4.2 Jg't og't ,

I:litang perubahsn sahu hagi campurcm dalam ehryterimen l- [4 markl

[Lihet sebelahSULIT

22

Experiment ReactantsBahan Tlndalcbalas

Heat of DisplecementI{*ba Penyesaran

(kJ mol-I )I 50 cm" 0.2 rnoldm-' coplxr gl)sulphate solution

+ metal P

50 crr3 0.2 moldm't larutan kupram {11'1sulfut +logamP

-336

II 50 cm'0.2 moldm-' copper{U)sulphate solution+ metal Q50 cm3 0.2 rnoldrn-t larutst kuprun (ll) sulfut +logam Q

-217

Table 9

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{c) By using one of the metal in 9 (a) (D, describe one experiment to dstermine

the heat of displaceinent.

Your answer should consist of the following :

o Procedure of the experiment

o The method to calculate the heat of displacement

Dengan menggunakan satu daripda logam dalam I (aXi), huraikan saw eksperimen tmtuk

menentukan hcba perqrcsaran.

Jawapan anda perlu mengandungi perkara berikut :c Prosedur elsperim*t

o Kaedah untuk menghittmg haba penyesaron.

[10 markrl

[Lihat sebclahS{JLIT

23

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454J.n

10 (a)

SI]LTT

Diagram l0 shows an apparatus set-up, its observation and chemical equation toinvestigate the displacement of halogen from its halide solution by halogen P.Rajah ft menunjukkan susunan radas , pemerhatian dan prsamaan kimia'untuk mengkaiipenyesaran hologen daripada larutsn halidanya oleh halogenP .

Diagnm 10

(i) Suggest the identity of halogen PC adangkan idmtiti halogen P

U markl

(i0 Write half equation for the oxidation or r€duction prccess that has occuned.Tuliskon setengah persamaan unuk proses pengofuidaan atet penuntnan yng telahberlalru.

[2, narlal

{iii) Describe a chemical test to verifu the displaced halogen in the reaction.Huraikon sata ujian kimia unt* mengesahkan halogen y(mg tersesar dalom tindakbalas ini.

13 marksT

plhet sebelahSULIT

24

potassium A , P

iodide solution U ,/larutan \ ,{, shakekaliumiodida \ I I gonccrrg\H-

_wl, l, I -trichloroethanel,l,l-triHoroetana

Chemical equation:Persamaan kimio :

zlf.l + Pz -'+ 2KP + Ie

t_Jlr{\#- purple

ungu

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4541n SULIT

(b) Table l0.l shows the result of two experiments to study the effect of metals M and Non the rusting of iron when coiled on iron nail.Jodual l0 .l fienunjukkan keputusan dua eksperimen untuk mengkaji kesan logam M dan Nke atas pengaratan besi apabila dililitkan pada paku besi.

ExperimentEksnerimen

0bservationPemerhatian

Experiment IEloperimenl

Hot agar solution +potassium hexacyanoferrate (l l$solution + phenolphthaleinlarutan agar-cgar panas *kalium heksasianoferat {lllt. +fenolftalein

metal MlogamM

Blue spots formed in theagarTompok biru terbentukdolam agar-sgar

Experiment IIEksperimen ll

Hot agar solution +potassium hexacyanofurrate (l II)solution + phenolphthaleinlarutan agar-agar panas +kaliam helasasianoferat (lfl) +

fenalftaleinmetal NlopamN

Pink spots formed in theagarTompak merch jambuterbentuk dalam agar-agar

Table l0.l

(i) Explain why there is a difference in observations for Experiment I and II.Terangkan mengopa terdapal perbezaan dalam pemerhalian bagi Eksperimenl dan Il.

15 rnarksl

(ii) Arrange in ascending order of metals M, N and iron based on theelectropositivity of the metals.Susunkan secara menaik bagi togam M,N dan besi berdosarkan sifatke e I e laropo si tifan I o gam .

I markl

(c) A student carried out an experiment to construct a Reactivity Series based on thereactivity of metal with oxygen.Table 10.2 shows the observation obtained by the student.Seorang pelajar telah menjalankan satu eh;perimen unluk membina sant Siri Kereaktifanberdasarlcan kzreakdan logam dengan gas oksigen.Jadual 10.? menunjr*kan pemerhatian yang diperolehi oleh pelajar in.

[Lihat sebel.rhSULIT

25

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t-

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Table 10.2

(i) Write a balanced chemical equation when iron reacts with oxygen to formiron (III) oxide.Tuliskan persamaan kimia yang seimbang apabila besi bertfndsk balas denganolrsigen untuk membentuk ferum(lll) aksido .

12 marks)

(ii) Table l0.J shows the appararus and materials to investigate the reactiviry ofmetals with oxygen.Jadual 10.3 menunjukkan radas dan bahon untuk mengkaji kereaktifan logam denganoksigen.

Solid potassium manganate (VIl),glass wool oasbestos WW1 bunsen burner, retort stand and clamp,boiling iubePepejal lcolium manganat (Yll),wul koca ,kerlas asbestos , penuna bunsen

koki retot dan pengapit, tabwg didih

Table 10.3

Based on Table 10.3, draw a labelled diagram to investigate the rcactiviqv ofany given metal with oxygen in the school laboratory.Berdassrkan Ja&al 10.3, tukiskan sebuah rajah berlabel untuk menkaji kereaktifanmana-tnana logam yang cliberi dengan oksigen di dslam malonal selcolah

[2 marks]

(iii) Arrange in ascending order of metals ircn, T and U based on their reactivitytowards oxygen.Explain how you construct this Reactivity Series.Susunkan secora menoik logam besi ,T danU herdasarkcn kereaktifan logamterse but terhadap oksigen.Terangkan bagaimana anda membina Siri Kereahtifan tersebut.

{4 narksl

Ilihat seb€lah$ULIT

25

MetalLogam

ObscrvaiionPemerhatian

lronBesi

Iron glows brightly and prducing a brown residueBesi membara dengon lerang dan rnenghasilkan baki berwarna perang

T MetalT glows dimly and producing a black residueLopam T membars densan ,nalan and menshasilkon boki berwarna hitam

U Metal U burns brightly and producing a white residueLog.am U terbakor densan terang dan menshasilkan bad berwarna putih

$4tn

END OS'Q{TESTTON PAPER

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PERIODIC TABLE OF THE I,LEMENTS

l\(t.l

,-//Proton number

rn{I f,i*+*SYmbolI X**-Name of element

\Relative atomic mass

t

HeHelium

{3

LiLithftm

1

{Be

Scrytliunt9

5

BBorfi

t1

6

cCarban

l2

1

NNitroger

l4

Io

0lryS.rtt6

Ir

Flucinel9

l0

NeNsr

?0

llNa

Sodium23

ItMg

t{agnerium24

t3

AIAlurni*ir

m71

l4

siSilicrlrt

2t

ItP

PllorphtrItt3t

l6

sSulphur

32

17

CIChlorit*

19

l8

ArArgss

40

l9

KForascium

39

20

CaCalcfuE

40

2l

SeScadium

45

+t

TiTironium

48

23

vVaaadiu

$JI

24

CrChronium

52

25

MnMrnpnx

c5t

26

FeIron56

27

CoCobolt

59

?8

NiNicktl

59

29

CnCopn6

64

30

ZnZirr65

3l

GnCallium

?0

'JGe

Carmanium71

33

AsAr$nic

75

14

SeSchnium

79

35

BrBromine

80

36

KrKrygon

84

37

RbRutridiun

E6

38

Sr$rontium

tt

39

YYtlriufi

89

,lO

ZrZircolium

9t

dl

NbNiSium

9]

42

MoMolybdcn

uo96

43

Tc't*hoeliu

m18

44

RuRutheniu

mt0l

45

R}Rhodium

103

rl6

PdPalladiurn

106

47

AgSihtr

103

4E

cdCadr,rium

il2

!t9

Inlndirm

il5

50

Snlltil9

5t

SbAatiuony

t22

TeTellutlunr

l2t

5l

Ilnlim

121

5{

XeXmon

t3t

JJ

CsCaesiun

r33

56

BaBerium

137

51

LaLaathanu

mr39

al

TIfllaftrium

t79

1t

TaTanlalun

l8t

11

wTung5len

184

15

ReRheniun

186

76

0sOmium

r90

77

Irlridiun

192

?E

PtPlailusr

195

79

AttQold197

EO

HgMdisury

?01

8l

TITtalliut

3(X

82

PbLd207

83

BiBismulh

249

8rl

Pofulonium

2t0

g5

AtAststinc

210

86

RnRador

JJ''

87

FrFnncium

723

t8

Ra

Radium2:16

t9

Ac

&tinitrm221

104

unqUnnil-

quadium251

t0J

unpUnnil-pct{inlr

260

IUO

Unh

Unnil-hcrum161

107

Uns

Umilsc.piun262

108

Uno

Unnilo$ium265

109

Uue

Unnil6nnium7n6

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1

SULIT: Chemistry 2 4541/2 (PP)

Question No Mark Scheme SubMark

TotalMark

1 (a) 2.1 // 2,1 1 1

(b) Group 17, Period 2 1 1

(c) (i) P // Ne // Neon 1 1

(ii) Octet electron arrangement // 8 valence electrons 1 1

(d) HOQ // HOF 1 1

(e) Q // F // Fluorine 1 1

(f) (i) R // Li // Lithium 1 1

(ii) 2R + 2H2O 2ROH + H2

// 2Li + 2H2O 2LiOH + H2

1. Correct reactants and products 2. Balanced equation

11 2

(g) P , Q , R 1 1

Total 10

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2


TotalMark

2 (a) Chemical formula that shows the simplest whole numberratio of atoms of each element in a compound 1 1

(b) To remove all oxygen / air 1 1

(c) Black solid turns brown 1 1

(d) (i) Mass of copper = 26.88 gMass of oxygen = 6.72 g ( unit compulsory ) 1 1

(ii) 1. Number of mole of Cu = 26.88 /64 // 0.42 Number of mole of O = 6.72 /16 // 0.42

2. Ratio Cu : O = 1 : 1

1

1 2

(iii) CuO 1 1

(iv) CuO + H2 → Cu + H2O


11 2

(e) Magnesium is more reactive than hydrogen //Hydrogen is less reactive than magnesium //Hydrogen is below magnesiumin the reactivity series 1 1

Total 10

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3


TotalMark

3 (a) (i) Contact process1 1

(ii) Haber process 1 1

(b) Nitrogen // Hydrogen 1 1

(c) (i)2NH3 + H2SO4 (NH4)2SO4

1. Correct reactants and product 2. Balanced equation

11 2

(ii) Fertilizer 1 1

(iii) 1. 28 X 100 % 132

2. 21.21%

1

1 2

(d) H Cl | | C = C | | H H

1 1

(e) Use biodegradable polymer. [ Accept: Any other correct answer ]

1 1

Total 10

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4


TotalMark

4 (a) HCl 1 1

(b) (i) No changes // blue litmus paper remain unchanged 1 1

(ii) Consist of molecule // no hydrogen ion / H+ 1 1

(c) (i) 1. Helps acid to ionizes / dissociate

2. Produce hydrogen ion / H+ // HCl à H+ + Cl- [ award pt 2 if write correct equation]

1

1 2

(ii) 2H+ + CO32- à CO2 + H2O


11 2

(iii) 1. Effervescence // bubbles of gas2. `Pop` sound

11 2

(iv) Acid only shows its acidic properties when dissolve in water// H+/ hydrogen ions are responsible for acid to show their properties.

1 1

Total 10

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5


TotalMark

5 (a) C3H8O [ r : C3H7OH ]

1 1

(b) 1. No. of mole of carbon dioxide = 0.1 X 3 // 0.3

2. Volume of carbon dioxide = 0.3 x 24 dm3 // 7.2 dm3 // 7200 cm3

1

1 2

(c) (i) Compound that contain carbon and hydrogen only 1 1

(ii)

water1. Functional diagram2. Label : water

11 2

(d) (i) Oxidation 1 1

(ii) Propanoic acid

[ r : formula ]

1 1

(e) (i) H O H H H | || | | | H – C – C – O – C – C – C – H | | | | H H H H

[ a: CH3COOC3H7 ]

1 1

(ii) To increase rate of reaction // As a catalyst 1 1

Total 10

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6

QuestionNo Mark Scheme Sub

MarkTotalMark

6 (a) m = 2 n = 2

11 2

(b) Eye

mixture

1. Functional diagram2. Label : Eye , X mark, hydrochloric acid and sodium thiosulphate solution // solution // mixture

11 2

(c) Sulphur 1 1

(d) 1. Labelled axis with units : ( temperature /oC, time /s)2. Suitable scale : (cover 50% of graph paper)3. All point are plotted correctly4. Correct shape and smooth curve

1111 4

(e) The higher the temperature, the less the time taken for Xmark to disappear from sight // the temperature is inverselyproportional to time 1 1

Total 10

X

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7


TotalMark

7 (a) 1. 2.8.2 // 2,8,2

2. Group 2 // 2

1

1 2

(b) (i) P and Q // Q and R // Cl and Mg // Mg and O

[ a: names of elements ]

1 1

(ii) - +2 --

P Q P

1. label nucleus with dot or symbol and correct shells2. octet electron arrangement and correct charges [ a: actual elements]

11 2

(c) 1. Electron arrangement of C : 2.42. O : 2.63. Carbon atom contributes 4 electrons for sharing with two oxygen atom.4. One oxygen atom contributes 2 electrons for sharing.5. both achieve the octet electron arrangement

111111 Max. 5

(d)Ionic compound Physical properties Covalent compound

Solid Physical state atroom conditions

solid, liquid,gaseous

High Melting/ boiling pt LowConductselectricity inmolten / aqueous

Electricalconductivity

Does not conductelectricity in allstate.

Soluble in water//Insouble inorganic solvent

Solubility in waterand organic solvent

Insoluble in water//Soluble in organicsolvent

Sodium chloride// other ioniccompound

Example ofcompound

Tetrachloromethane// other organiccompound

1+1

1+1

1+ 1

1+1

1+1 10Total 20

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8


TotalMark

8 (a) (i) Electrode Y : the position of ions in electrochemical seriesElectrode X : concentration of ions / solution/electrolyte

11 2

(b)Electrode Y X

Ions that areattracted Cu2+ , H+ Cl- , OH-

Ions that areselectivelydischarged

Copper(II) ion Chloride ion

Reason

Cu2+ is lower thanH+ in theelectrochemicalseries

Concentration ofCl- higher

Halfequations

Cu2+ + 2e Cu 2Cl- Cl2 + 2e

Observablechanges ofthe solution

Blue solution becomes paler

1 + 1

1 + 1

1 + 1

2 + 2

1

10

(c) (i) W, X, Y, Cu 1 1

(ii) 1. Cu2. 1.3 V3. Metal X is more electropositive than metal Cu

111

3

(ii) 1. Positif terminal : Q2. Negative terminal : Cu3. Suitable metal for Q : silver4. Suitable solution for R : silver nitrate solution

[ a: name of substance ]

1111

4

Total 10

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9


TotalMark

9 (a) (i) 1. P : Mg // Magnesium2. Q: Zn // Zinc

11 2

(ii) 1. The value of heat of displacement for Expt I is more than Expt II.2. The distance between P / Cu is bigger/ further3. than Q/Cu 4. in the electrochemical series.

1

11 1 4

(b)1. mol of CuSO4 = 0.2 x 50 // 0.01 10002. Heat = 0.01 x 336000 J // 3.36 kJ // 3360 J

3. Change in temperature = 3360 50 X 4.2

= 16 oC

1

1

1

1 4

(c) 1. Appratus: Polystyrene cup , thermometer, [spatula] measuring cylinder ( suitable volume)2. Procedure: 1. Measure 50cm3 of copper(II) sulphate solution 2. Pour into a polystyrene cup. 3. Measure the initial temperature, T1 4. Add a spatula of P // Q powder 5. Stir 6. Record the highest temperature, T2

3. Calculations: 1. T2 – T1 = T oC 2. Mol of copper(II) sulphate solution = n mol // 0.2 x 50 // 0.01 1000 3. Heat = mc (T) // 50 x c x T J 4. Heat of displacement = - 50 x c x T J mol-1 0.01 [ negative symbol and correct unit compulsory]

1

111111

11

11+ 1

Max 10

Total 20

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10

(i) P = chlorine // bromineAccept : formula

1

(ii) Oxidation = 2I- → I2 + 2eorReduction = P2 + 2e → 2P-

Note : P is Cl / Br

1.Correct formula of reactant and product2.Balanced equation

11

10 (a)

(iii) 1. Add slowly // Add drop by drop // Add by using dropper2. starch solution to the product in a test tube3. dark blue colouration/solution is formed

r: precipitate

111

6

(i) Exp 11.Presence of iron(II) ion2.Metal M is less electropositive than iron // metal M located lower than iron in Electrochemical Series3.When metal M in contact with iron nail, Iron rustExp 24. No iron (II) ion // presence of hydroxide ion5. Metal N is more electropositive than iron //metal N located above iron in Electrochemical Series6.When metal N in contact with iron nail, iron do not rust

1

11

11

1Max 5

(b)

(ii) M,iron,N 1 1

(c) (i) 4Fe + 3O2 → 2 Fe2O31. formula of reactant and product correct2. Balanced equation

11 2

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11

(ii)

Asbestos paper

heat heat

1. functional diagram,shading,and both heat2. label

11 2

(iii) 1.T,iron,U2.U is more reactive than T and iron so U is located aboveiron and T in the Reactivity Series3.iron is more reactive than T but less reactive than U soiron is located above T and below U in the ReactivitySeries4.T is less reactive than U and iron so T is located below Uand iron in the Reactivity Series.

1

1

1

1 4

20

END OF MARKING SCHEME

Solid potassiummanganate(VII)

Metalpowder

Glass wool

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SULIT

Nama: Tingkatan:

PROGRAM PENINGKATAN PRESTASI AKADEIVTIKSPM

TAHUN 2OI2

CHEMISTRY

Paper 3One hour and thirty minutes

JANGAN BUKA KERTAS SOAL.AN INI SEHINGGA DIBERITAHU

1.

2.

Kertas soalan ini adalah dalam dwibahasa.

Soalan dalam Bahasa lnggeris mendahuluisoalan yang sepadan dalam Bahasa

Melayu.

Calon dibenarkan menjawab keseluruhanatau sebahagian soalan sama ada dalamBahasa lnggeris atau Bahasa Melayu.

Calon dikehendaki rnembaca maklumat dihalaman belakang kertas soalan ini.

Untuk Kegunaan Pemeriksa

SoalanMarkahpenuh

Markahdiperoleh

1 24

2 9

3 t7

JUMLAH

3.

4.

454v3

Kertas soalan ini mengandungi t halaman bercetak

Lihat scbelahSULIT

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SULIT

INTORMATION FOR CANDIDTTES

l. This question paper consists of three questions. Answer all questions.

2. Write your answers for Question I and Question 2 in the spaces provided in the

question paper.

3. Write your answers fot Question 3 on the "helaian tambahan". You may use

equation, diagralns, tables, gfaphs and other suitable methods to explain your

answer.

4. Show your working" it may help you to g€t marks-

5. lf you wjsh to change your answef, neatly cross out &e answer that you have done.

Therr write down the new answer.

6. The diagrams in the q*estions are not drawn to scale 'tnless stated.

7. Mark allocated for each question orpart question are shown in brackets.

B. The time suggested to srxwers Que$tion I nnd Qucstion 2 is 45 minutes and

Question3h45minutes.

9. You may use enon-programrnable scientific calculator'

10. Hand your atlswer sheets at the end of the examination.

Marks awarded:

Mark Descrintion3

2t0

Excellent : The best resPonse

Satisfactory : An average response

Weak : An inaccrnate response

No response or wrong r€sponse

454t/3

pihat sebelahSULIT

4541/3

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SULIT 3

1 Diagram 1.1 shows two experiments to deterrnine the heat of nzutnalization.fujah l.l menunjukkan dua eksperimen tmtuft menentukan haba peneunalan

Polystyrene cupsCw'ot polistirena

hitial temperature of the mixtureSuhu awal campuran

Higbest temperature ofthe mixtue:Sahu tertingf cdrnpaftrn

Change in temperanrrePerubo.hnt suhu

Experimerit I

Reaction between 25 cm3 of sodium hydroxide solution , NaOH 1.0 mol dm-3 and 25 cm3 ofhydrochloric acid, HCI 1.0 mol dm-'Tinrlak bulus anturuZ5om3 letrutan fiatrium hi<Irol*idu, NaOH l-0 mol dm'3 elengtn 25cmi ucidhklxtWorik HCt 1.0 mol dm'3

Stirred___--____4dikacau

4s4113

[Lihat sebelahSUI,IT

OC

OC

OC

454t/3

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sul,rT 4 454U3

Experiment II

Reaction between 25 cm3 of sod.ium hydroxide solution , NaOH 2.0 mol dm-3 and 25 cm3of ethanoic acid, CH3 COOH 2.0 mol dm-iTirutak balas antara 25 cml larutan natrium hidroksida, NaOH 2.0 mol dm'3 deng*t 25 cm lasid et6noik2.0 mol dm-3

f}Ilililil|flW#f, W

\ Polystyrene cups /Cawan polistirena

Inifial temperature of the rnixture : Tr oC

Suhu cwal campuran

Highest temperature of the mixture: Tz uC

Subu te r t inggi c amFar sn

Change in temperature : T3 "CPerubahsn sulnt

(a) Wdte the initial and the highest temperature of the mixhne and change in tem.perafure

for Experimeni I in Diagram 1.1

Tulis suhu crwal dan suhu tertinggi campuran serta perubahan suhu untuk ElxperitnenldalamRajah l.l

13 marks)

(b) Construct a table that can be used to record the data from both experiments.Bina satuja&nl ymg boleh dignakn wrtuk merekod data bagi kedua-daa eksperimen

13 marrs'l

ll-ihat sebelahSULIT

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sultT 5 4541t3

(c) State one hypothesis for both experiments.Nyalakm satu hipotesis bagi kedaa-dua eh,sperimen

13 marbl

(d) Based on the temperatures in Experiment I, predict the change in temperature inExperiment II

. Eerdasskot suhu dalsm Ehrperimenl, ramslkwt peruhahan suhu bagi Eksperimen Il

[3 marks]

{e} Why must the initial temperature and the higlrest temperature be rscorded in these

experiments?Mengapakah suhu swal dwr suha tertinggi perlu direkodkan dalam ekrperimen ini?

[3 narfu]

(0 How can the value of the change of lenrperature be obtained?Bagaimwtakah nilai perubahan suhu diperoleh?

[3 wr.lesl

(g) For this experimentstateBagi eksperimen ini , nyatakan

ti) Manipulated VariableP embol e hubah dimantpulas i

(it RcspondingVariableP em b a I e lubuh beryerakbalus

(iii) ConstantVariableP e mbo I e la$ ah d i tzna,l a r km

[ 3 marks]

ll.ihat sebelahSULIT

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fri) Diagram 1.2 shows the calculation to determinc tlre heat of neutralisation for the

reactions in Experiments I and IIn";"n 1.2 menmju*kan perhitungan untah menentukm haba peneatralan bogi tiwlak

balos daiam Ekperimenl dan Eksperimenll

Experiment I

Heat releasedI{aba yang dihebaskan

: mcO

=50Bx4.2Jgr x*xJ

Heat $f neutralisationHaba penedralan: xkJnumber ol'mole of water Produced

bilangan mol air.vang dihs$ilksn

Experiment II

Heat releasedHaba yang dibebaskan: mc0= 50 8 x4.21=yJ

XT3oC

Heat of neutralisationtr{aba peneutra}rm

= y-kinumtrer of mole of water Produced

bilangon mol air Yang dihusilkan

oc

It *'as found that the value of x is greater than value of y'

Explain why.Didapa{i nilai x lebih hesat dtnipada nilai y'

Teranglam mengsps.

t3 morksJ

flLihat sebelahSULIT

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sulrT '7 454113

2 Table 1 shows Experiment I, Experiment II and Experiment III which arc conducted to study

the solubility of salts in water.

Jadaal 1 menunjukkon Ekperimen [" Eksperimen {( don Eksperimen lll vang diljalankm untaknengkqji keterlarulan gararn dalam air.

Experiment ReactionTindaL balas

ObservationsPenerhstian

I

Add waterTambah sir

Calcium nitrate Colourless solutionKqlsium nitrat Larwan tak berwama

IIAdd waterTsmbahair

-|}Copper(Il) sulphate Blue solufionKr,prrndll) sulfat Larutat biru

NI

Calcium carbonateKalsium ka*anat

[Lihat sebelabSULIT

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Table I

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(a) V/rite the observation for Experiment I. II and III in Table LTul is pemerlnt ian bagi Eksperimen l, ll don lll dalaw Jadaal I .

13 marksl

(b) Based on Experiment I and II, state the operational definition of soluble salt.Berdasskan Eksperimen I dmt fI" nyatakm definisi secaro operasi bagi garam terlarut.

f3 marks]

(c) Classif the following salts into solubl€ salts and insoluble salts.Kelaskon gsram-gmrofi, di bowuh ke@a garom terlarw de, garam tak terlsrut.

$odium sulphate, Lead(II) sulphate, Barium sulphate, Magnesium sulphate

Natriam sulfat, Plumbum$l) sulfat, Borium sulfal, Magtesium sulfut

l3 marksl

pihat sebelshSULIT

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3

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The distance between pnirs of different metals in the electrochemical serisr aflectthe.voltnge produced.Jarak di antara pasangan logamyntg berlainon di dolam shi elehtto*imia mcnpengarahivoltan yrng lerhssil

Diagram 3 shows a voltaic cell which consist of two different metals dipped in an electrolyte.Rajah 3 newnjul*an salu sel voltan yang terdiri daripada dua logam yang berlainan di celup dalansatu elektolit.

Copper{Il) sulphate solutionLar u t an kup r wn(ll)s u Ifu t

Diagranr 3Based on Diagram 3, plan one laboratory experiment to investigate the efTect ofthe distance betwo€n two metals in the electrochemical series on the voltage produced.Berdacwksn Rcjah3, rancang sata ekryrimen mobtwl wtak mengkaji kescn jwukdi sntara dua logam dalam siri elektrokimis kE atas voltan yang terhasil.

Your planning should include the follorrying aspects:Perancangan anda lendailah tnengqftdungi aspek-aspe k ber ikut:

Problem statementPernyataan masalah

AII the variablesSemua pemboleh ubah

HypothesisHipotesis

List of materials and apparatusSenaai balmn danradas

ProcedtrreProsedur

Tabulation of dataPeqiadualan data

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[17 marks]

pihat sebsldhSULIT

END OF QUESTION PAPER

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PAPER 3: CHEMISTRY

Question Mark Scheme Marks

1(a) Able to record all the temperature accurately

Answer

Initial temperature = 29.0

Highest temperature = 41.0

Change of temperature = 12.0

3

Able to record all the temperature correctly

Sample answers

Initial temperature = 29

Highest temperature = 41

Change of temperature = 12

2

Able to record one temperature correctly 1

No response or wrong response 0

1(b) Able to construct table accurately with correct title and unit

Sample answer

ExperimentTemperature°C

I II

Initial temperature of mixture 29.0 T1

Highest temperature of mixture 41.0 T2

3

Able to construct table correctly without unit 2

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Able to construct table less accurate with at least one experiment 1


1(c ) Able to state the hypothesis accurately

Sample answer

The heat of neutralization of a weak acid and strong alkali is smaller thanthe heat of neutralization of strong acid by a strong alkali

3

Able to state the hypothesis correctly

Sample answer

The heat of neutralization changes when different acids react with strongalkali

2

Able to state the idea of hypothesis

Sample answer

The heat of neutralization changes

1


1(d) Able to predict the change of temperature accurately

11°C

3

Able to predict the change of temperature correctly

9-10°C

2

Able to predict less correctly

7-8°C

1

No response or wrong answer 0

1(e) Able to explain with two correct reasons

Sample answer

*This is to enable the change in temperature to be measured.

*The change of temperature is needed to calculate the heat of neutralization

3

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Able to explain at least one reason from the above 2

Able to give an idea of explaining 1


1(f) Able to state the formula accurately

Sample answer

Change in temperature= Highest temperature of mixture- initial temperatureof mixture

3

Able to state the formula correctly

Sample answer

Difference of temperature between highest and lowest

2

Able to give an idea of calculating 1


1(g) Able to state all the variables correctly

Answer

Manipulated Variable: The type of acid used // ethanoic acid,

hydrochloric acid

Responding Variable : The heat of neutralisation

Constant Variable : The concentration and the volume of acid andalkali // the type of container that is used to hold the mixture

3

Able to state two variables correctly 2

Able to state one variable correctly 1


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1(h) Able to explain with two reasons correctly

Sample answer

1.Experiment I uses a strong acid whereas Experiment II uses a weak acid.The heat of neutralization of a weak acid by a strong alkali is less than theheat of neutralization of a strong acid by a strong alkali .

2 This is because during neutralization of a weak acid such as ethanoic acid, part of the heat is used to dissociate the acid molecules

3

Able to explain with one of the reasons 2

Able to give an idea

Sample answer

Ethanoic acid is a weak acid

1


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Question Mark Scheme Marks

Able to state all observation correctly

Sample answer

EXPERIMENT Observation

EXPT ICalcium nitrate dissolves //

Colourless solution is formed.

EXPT IICopper(II) sulphate dissolves//

Blue solution is formed

EXPT III .Calcium carbonate does not dissolve/remains

unchanged // No change. 3

Able to state any 2 observations correctly. 2

Able to state any 1 observation correctly. 1

2 (a)


Able to state the operational definition of soluble salt correctly

Sample answer:

When a salt is added into water and dissolves to form a solution, it is a soluble sal t.//

When a salt dissolves in water to form a solution, it is a soluble salt.

3(b)

Able to state the operational definition of soluble salt less correctly

Sample answer

When a salt is added into water and forms a solution, it is a soluble salt.

When a salt dissolves to form a solution, it is a soluble salt.

Salt dissolves in water to form a solution.

2

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Able to state any idea of operational definition of soluble salt

Salt dissolves//Salt dissolves in water.

Solution forms.

1


Able to classify all the solutions correctly

Sample answer

# Score 1 – if state in the reverse

Soluble salt Insoluble salt

Potassium sulphateZinc sulphate

Lead(II) sulphateBarium sulphate

3

Able to classify at least 3 salts correctly 2

Able to classify any 2 salts correctly 1

(d)


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Question Mark Score

Able to state the problem statement correctly

Sample answer:

How does the distance between two metals in the electrochemicalseries affect the voltage produced?

2

Able to state the problem statement less correctly 1

3(a)


Question Rubric Score

Able to state the three variables correctly

Sample answer:Manipulated: Pairs of metals

Responding: Voltage // Voltmeter reading

Constant: Electrolyte // Copper(II) sulphate solution // Copperelectrode//Concentration of electrolyte

3

Able to state any two variables correctly 2

Able to state any one variable correctly 1

3(b)


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Able to state the hypothesis correctly and with direction

Sample answer:Hypothesis: The further the distance of the pairs of metals in theelectrochemical series, the greater the voltage produced

3

Able to state the relationship between manipulated variable andresponding variable but in the opposite direction // no direction 2

Able to state an idea of the hypothesis1

3(c)



Able to give complete list of substances and apparatus

Sample answer:

SubstancesCopper (II) sulphate solution, magnesium metal, zinc metal, ironmetal, copper metal, sandpaper.

ApparatusBeaker, connecting wire, voltmeter

3

Able to give at least two substances and at least two apparatus 2

Able to give at least one substance and at least one apparatus 1

3(d)


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Question Rubric ScoreAble to list all the steps correctly

Sample answer:1. Clean the strips of magnesium and copper with sandpaper.2. Measure 50 – 100 cm3 of copper(II)sulphate solution and pour

into a beaker.3. Dip the magnesium and copper strips into the copper(II)

sulphate solution.4. Complete the circuit // Connect the strips to the voltmeter.5. Record the voltmeter reading.6. Repeat steps 1 to 5 by replacing pairs of Mg/Cu with Zn/Cu,

Al/Cu and Fe/Cu.

3

Able to list down steps 2, 3, 4 and 52

Able to list down steps 3 and 41

3(e)


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Question Marks Scheme Marks

2(f) Able to exhibit the tabulation of data that includes the following fourinformation.

1. Heading for the manipulated variables

2.. Heading for responding variable

3. All Manipulated variables

Sample answer:

Pairs of metals Voltmeter reading // Voltage

(V)

Mg / Cu

Al / Cu

Fe / Cu

Zn / Cu

3

Able to exhibit the tabulation of data that includes the following threeinformation.1. Heading for the manipulated variables2.. Heading for responding variable3. One Manipulated variableSample answer:


(V)

Mg / Cu

2

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Able to exhibit the tabulation of data that includes the following twoinformation.1. Heading for the manipulated variables2.. Heading for responding variable

Sample answer:


(V)

1

END OF MARKING SCHEME

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Spm Trial 2012 Chemistry Qa Kedah

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