Trial Perak Spm Kimia 2009

ST]LIT 454u1 Percubaan SPM Chemistry

2OO9 Paper1 1%hours

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PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

CHEMISTRY PAPER 1 One hour and fifteen minutes Satu jam lima belas minit

DO NOT OPENTIIE QI]ESTIONPAPERT]NTILYOU ARE TOLD TO DO SO JANGAN BAKA KERTASSOAI./IN INI SEHINGGADIBERITAHU

1.

Kertassoalanini adalahdalamdwibatnsa

2.

SoalandalambahasakrggerismendahuluisoalanyangsepadandalamBahasaMelayu.

3.

Calondikehendakimembacamaklumatdi halamanbelakangkertassoalanini.

Kertas soalanini mengandungi20 halaman bercetalc

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ST]LIT What is the useof phosphorus-32? Apalrah lregunaanfo sforus-32? A B C D

Treafuentof cancer Rawatancancer Desftoybacteriain food Memusnahkanbaheria dalam malmnan Estimatethe ageof fossils Menganggarlmnumurfosil Studythe metabolismof fertilisersin plant Menglmji metabolismabaja dalam tumbuhan

DiagramI showsthe sfructureof fluorineatom. Rajah 1 menunjukkonstruhur bagi atomfluorin

Diagram1 Rajah I Whichof the following is true aboutfluorineatom? Antara berilafi,yang manakahbenar tentangatomfluorin? Numberof electons Bilangan elektron A9 B9

c l0 D19

Nucleonnunrber Nombor nukleon 10 19 t9 28

and its chemicalformulais tue? Whichof the following zubstance Antara bahan danformula kimia berihtt yang manakahbenar?

A B C D

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Substance Bahan Sodiumsulphate Natrium sulfat lvlagnesium nitate Magnesiumnitrat Zinc chloride Zink klorida Aft:nrinir.nn carbonate Aluminium knrbonat

Chemicalformula Formula kimia NarSOo MgNO, ZltCI

Al(coJ3

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Whichof the following scientistswasthe fint to classifi elementsinto differerf groups? Antara ahli sains berikut yang manakahmula-mula mengelaskanunsur-unsurdalam htmpulanyang berlainan? A B C D

AntoineIavoisier JohnNewlands H.J.G Moseley Dmiti Mendeleev

Which of the following statements showthe changesin the chemicalpropertiesof Group 17 going elenrents when down the group? Antara pernyataan berikut, yang manakahmenunjukkanperubahan sifat kimia unsur Kumpulan17 apabila menurunihtmpulan? I II m IV A B C D 6

I and III only II and IV only I, II and III only I, II, ilI and IV

Two or more atomsare bondedchemicallyby sharingelectons. What type of bond formed? Dua atau lebih atom membentukikntan kimia melaluiperkongsianelehron. Apalrahjenis ikntan yang terbentuk? A B C D

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Nu:rber of shellincreases Bilanganpetala bertambah Reactivityof the elemen8increases Kereahifan unsur bertambah The tendencyto gain electon decreases Kecenderungan untuk menerimaelectronberkurang The oxidationnumberdecreases Nomborpengoksidaanberhtrang

Ionic bond. Ikatan ionik. Covalentbond. Ikntan kovalen. Metallicbond. Ilmtan logam. Van der Waalsforce. Daya Vander Waals.

Whichof the following substances is an ionic compound? Antara bahan berihtt yang manakahmerupakansebatianion? A B C D

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Sugar Gula Sodiumchloride Natrium klorida Carbondioxide Karbon dioksida Orygengas Gas oksigen [Lihat sebetah SI]LIT

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What is an electolyte? Apalrah elehrolit? A B C D

Substances that conductelecticity in moltenstateand aqueoussolution. Bahanyang mengalirlmnelehrik dalam keadaanleburan dan larutan ahtes Ionic compoundthat conductelecticity in all physicalstates. Sebatianionik mengalirkanelektrik dalam semuakeadaanfizik Substances ttrat cannotconductelecticity. yang Bahan tidak boleh mengalirkanelektrilc Non metalthat canconductelecticity. Bulran logam yang boleh mengalirkanelektrik.

represent nzutalization? Whichof the following chemicalequations Antara persamaankimia berihtt yang manakahmewakilipeneutralan? A B C D

Zn + 4SOo -+ ZnSO4+ H2 AgNO, + HCI -+ AgCl + HNO3 2NaOH + HrSOo+ NqSOo + 2HrO CaCO,+ H2SO4 + CaSOo+ H2O+ CO,

+ Sulphuricacid -) X? What is substance

10 Substance X

BahanX + asid sulfurik + Apalrah bahan X? A B C D

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Salt Y

GaramY +

+

Water +

Carbondioxide

air + karbondioksida

Copper(Il)oxide Kuprurn (II) oksida lvlagnesium metal Logarnmagnesium Zinc carbonate Zink karbonat Sodiumhydroxide Natrium hidroksida

Which of the following saltsarepreparedby precipitationreaction? Antara garam-garamberihtt yang manakahdisedialmnmelalui tindak balas pemendalcan? I tr m ry A B C D

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Silverchloride Argentumklorida nitate lvlagnesium Magnesiumnitrat Barfun zulphate Barium sulfat Zinc carbonate Zink knrbonat I and III only II and IV only I, II and trI only I, III and IV only

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What is the productof HaberProcess? Apalrahhasil daripada ProsesHaber? A B C D

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Fertilizers Baja Ammonia Ammonia Nitic acid Asid nitrik Sulphuricacid Asid sulfurik

How does temperatureincreasethe rate of reaction? Bagaimanalmh suhu dapat meningkntkan kndar tindak balas? A B C D

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Increasethe activation enerry of the reaction Meningkatkan tenagq pengaktifan tindak balas Increasethe energy of particles involved in the reaction. Meningkatkan tenaga zarah-zarah yang terlibat dalam tindak balas Decleasethe effective collision of particles involved Mengurangkan perlanggaran berkesan bagi zarah-zarah yang terlibat. Decreasethe rate of collision among the panicles involved Mengurangkan kadar perlanggaran antara zarah-zarah yang terlibat

What is tlre meaningof the effective collision? Apakah maksud perlanggaran berkesan? A B C D

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The collision which takes place before reaction Perlanggaran yang berlaku sebelum tindak balas The collision that has the highest ener5/ Perlanggzran yang mempunyai tenaga yang paling tinggi The collision that can causesreaction. Perlanggaran yang akan menyebabkantindak balas The collision where its energyis less than the activation eneryy. Perlanggaran di mana tenaganya adalah htrang daripada tenaga pengahifan.

Coconutoil + Sodiumhydroxide ----+ Minyak kelapa + Natrium hidroksida +

A + Soap A + Sabun

Whatis A? ApakahA? A B C D

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Ethane Etana Ethanol Etanol Glycaol Gliserol Sodiumethanoate Natrium etanoat [Lihat sebelah ST]LIT

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B C D

B C D

Ahrniniurn Aluminium Silver Argentum Ttoi Stanum Copper Kuprum

Which of the following chemicalreactionsis an endothermic reaction? Antara tindak balas kimia berihtt, manalcahtindak balas endotermik? A B C D

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The densityof heptaneis highertlranttrat of decane. Ketumpatanheptanaadalah lebih tinggi daripada dekana. The boiling point of hexaneis higherttranthat of octane. Talmtdidih helrsanaadalah lebih tinggi daripada oktana. The viscosityof nonaneis higherttranthat of pentane. Kelilwtan nonana adalah lebih tinggi daripadapentana Both butaneand octaneare liquids at room temperature. Kedua-duabutanadan ohana adolah cecairpada suhu bilik

Which of the following metalsact asthe sacrificialmetalto protectiron from rusting? Antara logam berilafi, yang manakahbertindaksebagailogam porban untuk ieltndungi besi daripada berkaratT A

18

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Whichof the following statements is tue? Antara pernyataanberikut yang monakahbenar? A

17

6

Combustionof firel Pembakoranbahan api Bunirg of metal Pembaknranlogam Neutalisation Peneutralan Photosynthesis Fotosintesis

The formulaeof nitate ion and carbonateion is shownbelow Formula bagi ion nitrat dan ion karbonatditunjukkandi banah. Nitate ion : NOrIon Nitrat : NOrCarbonateion : CO.2Ion Karbonat : C(i"2If the formtrla of nitate of M is M(NO3 ), What is the formula of carbonateof M? Jilraformula M nitrat ialah M(No3), Apaknhformula M karbonat? A B

M C O3 M ( C O3)2

c

M 2 co3

D

M2(C03)3

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The followingthermochemical equationrepresents the formationof ammoniagas. Persamaantermokimiaberihtt mewahilipembentukangas ammonio.

\

+ :H,t'

2NH3

AH : - 45' kJ

Which of the following diagrarnsshowsthe correctenergylevel diagmmfor the thermochemical equation? Antara rajah berihtt, yang manakahmenunjukkangambar rajah aras tenagayang betul bagi persamaontermokimiaitu? A

EnergylTanga

N, + 3H,

Energr/Tenaga

AH: - 45 kJ

Enerry/Ternga

AH = -45 kJ

Nr* 14 EnerrylTenaga

AH = -45 kJ

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Wh* is the wage of penicillin? Apalrahlregunaanpenicillin? A B C D

Reducingpain Mengurangknn kesakitan Reducingandety Mengurangkan lcemurungan Contolling the level of glucosein blood Mengawalaras gula dalam darah Destolng or prevelrtingthe growthof bacteria Memusnahknnatau menghalongpertumbuhanbaheria

22 Diagram2 showsthe heatingcurveof solid X. Rajah 2 menunjukkanlengkukpemanasanpepejal X Temperature/ oC Suhu / "C

Tz

Tl

Time /min Masa /min

D@nrn2 Rajah 2 Which of the following statements canbe deducedfiom Diagram2? Antara pernyataan berihtt, yang manalmhboleh disimpullcandaripada Rajah 2? A Themeltingpoint of X is I Takatlebur X ialah T, B Substance X is a liquid at t, to ! BahanX adalah cecair pada t, hingga t, C Heat energyis absorbedfrom 0 to t Tenagahaba diserap daripada 0 ie t, D Kinetic enerry of particlesdecreases from ! to t, Tenagakinetik zarah berhtrang daripada trke t,

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$ruT

9

As4rtr

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Atom of elementX consistsof 19 protons,20 neufronsand 19 electrons. Which of the fo[owing stateme,nts slrowsthe chemicalpropertiesof elementX? Atom bagi unsurx mempunyai19 proton, 20 neutrondan 19 elektron. Antara pernyataan berihtt, yang rnanakahmenunjukkonsifat kimia bagi unsur X? A X r€actswith $ater to form alkali solution X bertindak balas denganair untuk menghasilkanlarutan altuti B Atom X form ion )G* Atom X membentukion X* C X is chemicallyinert X lengai secara kimia D X reactwith oxygento form covalentcompound X bertindakbalasdengan oksigenmembentuksebatian kovalen

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TableI showsthe elecfionarrangement of atom of elementsK and L. Jadual I menunjuklwn.susunan eleWronbagi atom K dan L. Atom of element Atom bagi unsur K L

Electon Arrangement SusunanEleknon

2.8.2 2.8.7

Table 1 Jadual I Which of the following chemicalformulaeand tlpes of bondingformedwhen elementK reacts with elemelrtL? Antara formula kimia dan jenis ikatan berikut, yang manalmhterbentuk apabila unsur K bertindak balas denganunsur L? Chemicalformula Forrnula kimia

Typeof bonding Jenis lkatan

A

KLz

B

IqL

C

KL,

D

KrL,

Ionic Ion Ionic Ion Covalent Kovalen Covalent Kovalen

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10

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Diagram3 showsthe set up of apparatusof an electolysisprocess. Rajah j menunjukJran susunanradas bagi suatuproses elelctrolisis.

Carbon Karbon 0.1 mol dm-3Copper(Il)sulphatesolution Larutanfuprum(Il) sulfat 0.1mol dm-3 Dagram3 Rajah 3 Which ion that will be dischargedat the anode? Ion manalrahyang akan dinyahcaskandi anod? A B C D

Copper(tr) ion. Ion htprum (II). Sulphateion. Ion sulfat Hydroxideion Ion hidroksida. Hydrogenion. Ion hidrogen.

Which of the fo[owing acids hasthe lowestpH value? Antara asid-asid berihtt yang manakahmempunyainilai pH paling rendah? A B C D

50 cm3of 0.1 mol dmahydrochloricacid. 50 cm3 asid hidroklorik 0.1 mol dma. 50 cm3of 0.1 mol dm{ ethanoicacid. 50 cm3 asid etanoik 0.1 mol dma. 50 cm3of 0.1 mol dma sulphwicacid. 50 cm3 asid sulfurik 0.1 mol dm3. 50 cm3of 0.1 mol dmi nitic acid 50 cm3asid nitrik 0.1 mol dm3.

27 A studentpoured25.0 cm3of 2.0 mol dmi of sodiumhydroxidesolutioninto a conicalflask. Then25.0 cm3of distilledwaterwas addedinto tlre sameconicalflask. Whatis the final concentationof tlre sodiumhydroxidesolutionin the conicalflask? Seorangpelajar telah memasukkon25.0 cm3larutan natrium hidroksida berkepekatan2.0 mol dma lre dalam sebuahkelalang lan. Selepasitu 25.0 cm3air suling ditambahkanke dalam lrclalang lconyang sama. Apalrah lrcpekatanakhir larutan natrium hidroksida dalam kelalang kon ituT A B C D

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0.5 mol dmi 1.0mol dmr 2.5 mol dmi 4.0 mol dm{

sebelah [Lihat ' SULIT

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tl

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The followingsare the propertiesof a glass:o No resistanceto heat o Malleable Berihtt ialah sifat-stfat bagi lraca:o Tidak tahan haba o Boleh ditempa Which of the following glasshasthe abovecharacteristics? Antara ienis lwca berihtt yang manakahmempunyaiciri-ciri seperti di atas? A Leadglass Kaca plumbum B Soda-limeglass Kaca soda-kapur C Borosilicateglass Kaca borosiliknt D Fusedsilica glass Kaca silica terlahtr

29

Diagram4 showsthe resultsof a seriesof test which is caniedout on solutiony Raiah 4 menuniukkankeputusanbagi satu siri ujian yang dijalantran ke atas larutan y Sodiumhydroxide Natrium hidroksida

Greenprecipitate Mendakanhijau

Dilute nitic acidfollowedby bariumchloridesolution Asid nitrik cair diikuti dengan larutan barium klorida

Dagram 4 Rajah 4

Identifythe solutionY Kenal pasti larutan Y A B C D

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hon@ sulphate Ferum(II) sulfat Lead@ sulphate Plumbum(Il)sulfat kon(Itr) nitate Ferum(Ill nitrat Zinc nitate Zink nitrat

Which of the following half equationsrepresents an oxidationreaction? Antarapersamaansetengahberikut,yang manaknhmewakili tindak balaspengoksidaan?

A B C D 454u1

C r r O .,2 '+1 4 H * +6 e -) S f i ) S n a *+2 e MnO4- + 8H* + 5e' ) C l "+ 2 e ')2 C l -

2 C f.+

7H2O

Mn2* + 4H,O [Lihat sebelah SI,]LIT

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of 50 cm3of 1.0mol dmi hydrogen Diagmm5 strows curveT obtainedfrom the decomposition oxide powderas a catalyst at 300C. peroxidesolutionby using 5 g of manganese(IV) Rajah 5 menunjuLfantengtang T yang diperolehi daripada penguraian 50 cm3 larutan hidrogenperopsida I.o mit dmi menggunakan5 g serbuk mangan (IV) oksida sebagai mangkinPada suhu 3UC

31

Volumeof gas/ cnf

DiagrafiI 5 Rajah 5

Time/ s Masa / s

Which of the following changesof reactingconditionsmustbe doneto obtaincurveS? Antara perubahan keadaan tindak balas berikut yang manakah mesti dilalatkan untuk menghasilkanlenghtng S ? Increasethe temperatureup to 600C A Tinglmtkansuhu kePada6UC B Use 3 g manganeso(It/)oxide powder Gunakan3 g serbukmangan(IV)oksida peroxidesolution. use 100cm3of 1.0mol dm-3hydrogen c Gunakan 100cm3larutan hidrogenperoksida1.0 mol dm3 Add 50 cm3of distilledwaterinto the solution D 50 cm3air suling ke dalam larutan Tambahlcan 32

referto tlre propertiesof compoundJ. The following statements Pernyataanberihtt meruiuk kepadasifat sebatianJ * *

reactswith magnesium bertindak balas denganmagnesiurn from ethanol canbe PrePared boleh disediakandaripada etanol

What is the nameof comPoundJ? Apaluh nama sebatianJ? A B C D

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Methanoicacid Asid metanoik Etlranoicacid Asid etanoik Propanoicacid Asid ProPanoik MethYletlmnoate Metil etanoat [Lihat sebelah SI.]LIT

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13

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A studentfound that an iron nail left in a beakerof geldin" rustsafter a few days.How the rate ofrusting can be reduced? Seorangpelajar mendapatipaht besi berkarat, selepasdibiarkan di dalam bikar yang mengandungigelatin selama beberapa hari. Bagoimanakah kadar pengaratan dapat dihtrangkan? A B C D

A few dropsof phenolphthalein is added Beberapatitisfenolphtaleindimasukkon The beakeris kept awayfrom the sunlight Bilrar diletaklwnjauh daripada cahayamatahari The beakerof gelatinis coveredwith a pehi dish Bilrnr yang tnengandungigelatin ditutup denganpiring petri. Zinc powderis addedto the gelatinbelorethe experiment. Serbukferum dimasukkankepadagelatin sebelumelaperimen..

What is the nameof the processto preparesoap? Apalrahnamaproses bagi penyediaansabun? A B C D

Ostwald Ostwald Neunalisation Peneutralan Esterification Pengesteran Saponification Saponifikasi

35 Whatis the commontaditional medicineusedto teat malaria? Apalrah ubat tradisional yang digunakanuntuk merawat malaria. A B

36

Aloe vera Aloe vera Gingo Halia

Quinine Kuinin Banrboo Buluh

Thefollowinginformationis aboutatomW Maklumat berikut adalah tentang atom W The numberof neutonsis 20 Bilangan neutronialah 20 The numberof electonsis 19 Bilangan elehron ialah 19 Which of the following symbolsrepresent an atomW ? Antara simbol berihtt, yang manakahmewakiliatom W ?

t9

w

c3 9

20 20 l9

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20

w

D39

w l9 [Lihat sebelah ST]LIT

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compositionby rnassof nitogen in ammoniumnitate, NH4Nq? 37 what is the percentage

N, 14 ; O, 16 ] I Relativeatomicmass: H, 1 ;'mengilwt iisim bagi nitrogendalam ammoniwnnitrat NHJ'tOs? Berapalwhperatustwmpoirsf 16 l I Jisim atomrelatif : H, 7 ; N, 14 ; O, r 7 . 5% A 22.5% B 35.0% c 60.0% D

the combustionreactionof hexene,COHIz' 38 The chemicalequationbelow represents CF,, Persamaankimia di bm,vahmewakilitindak balaspembalmranhelcsena, + 6H2O +9 Or 46CO2 C u H ,,

in excessoxygen? What is the volumeof carbondioxideformedwhen 8.4 g of hexenebumt terbakar dalam Berapaknhisipadu gasknrbon diottsida terbentukapabila 8.4 s heksena olaigenberlebihan? and 1 mol of gasoccupiesthe volumeof 24 dm3 [Relativeatomicmass: H, 1 ; C, 12 ; 0,16 ; at room conditions] dan I mol gasmenempatiisipadusebanyak I Jisim atom relatrf : H, ] ; C, 12 ; O, 16 ; 24 dm3pada keadaanbilik J A B c D 39

10.80dm3 14.40dm3 26.40d# 28.88dm3

X, y andZ are elementsin the sameperiodin the PeriodicTableof Elements' The propertiesof their oxide compoundis shownbelow' * the oxide of X is amPhoteric, * the oxide of Y is acidic * the oxide of Z is basic. (Jnsur-unsur x, Y dan z terletakpada knla yqng samadalamJadual Berlmla unsur' sifat-sifat bagi olaida sebatianitu adalahsep€ftidi bawah' * ol<sidabagi X bersifat amfoterik' * oksidabagi Y bersifatasid' * oksidabagi Z bersifutbes' Arrangethe elementsX Y andZ nthe orderof increasingprotonnumber' proton menaik. Susunkanunsur-unsurX, Y dan Z berdasarknnsusunannombor

A

X,Y , Z

c D

Y , X ,Z Z, X , y

B z,Y,x

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Diagram6 showsthe elecfronanangementof atomsR and S. Rajah 6 menunjukkansusunanelehron bagi atom R dan S.

Diagram6 Rajah 6 Whichof the followingdiagnmsshowsthe electonanangement for tlre compoundformedbenveen atomsR and S? Antara raiah berikut yang manakah menunjukkansusunanelektron bagi sebatianyong terbentukantara atom R dan S?

O O B

CI

l-

O

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c

D

Q

tl tt ilt t tt

oo

ol

O

Q [Lihat sebelah ST]LIT

4l

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electoplate an iron which of the following diagramsshowsthe correctset-upof apparatusto key with silver? yang betul untuk Yang manakah antara raiah berikut menunjukkansusunon radas palat besi denganargentum? menyadurkan

A

Silver Argentum Iron key Kunci besi

Silvernitate solution Larutan argentumnitrat

B Silver Argentum Iron key Kunci besi

Silvernitate solution Larutan argentumnitrat

C Silver Argentum Iron key Kunci besi

Silvernitate solution Larutan argentumnitrat

D Silver Argentum Iron key Kunci besi

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Silvernitratesolution Larutan argentumnitrat

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Table2 showsthe pair of electrodes in chemicalcell, cell voltagesandthe negativeterminalsof threedifferentchemicalcells. Jadual 2 menunjuk)ranpasangan elehrod dalam sel Hmia, voltan sel dan terminal negatif bagi tiga sel kimia berlainan.. Pair of Electodes Pasanganelelarod W andY WdanY

XandY XdanY Y andZ Y andZ

Voltaga(V) Voltan(V) 3.0

Negativeterminal Tbrminal negatif

1.1

X

0.5

Y

w

Table2 Jadual 2 Whatis the cell voltageif X and Z are usedas the electodesin the chemicalcell? Berapakahvoltan sel sekiranyaX dan Z digunakansebagaielektroddalam sel kimia itu? A 0 . 6V B 1.6V

43

c

3. 5 V

D

4 . 6V

The chemicalequationfor the reactionbetweensulphuricacid and potassiumhydroxidesolution is shownbelow: 2KOH + H2SO4 )

LSO4 +2H2O Persamaankimia bagi tindak balas antara asid sulfurik dan larutan kalium hidroksida ditunjukkanseperti di bawah: 2KOH

+ HfOo

)

KlSO4 + 2H2O

Whatis the volumeof 0.1 mol dmi of sulphwicacidneededto neutralize25.0cm3of 0.5 mol dmi of potassiumhydroxidesolution. Apalmh isipadu asid sulfurik berkepekatan0.1 mol dmayang diperlukan untuk meneutrallan 25.0 cm3larutan lmlium hidroksida.0.5 mol dma. A B C D 44

15.5cm3 25.0cm3 50.0cm3 625 cm3

Whatis the oxidationnumberfor nitogen in nitate ion, NOr-? Apalrahnomborpengoksidaanbagi nitrogendalam ion nitrat, NO,'? A B

-l -3

c D

+5 +7

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What is the massof zinc sulphatethat canbe preparedby addingexcesszinc with 50 cm3of 1.0 mol dma sulphuricacid Apalrahjisim zink sulfat yang boleh disediaknnapabila zink berlebihanditambahkankepada 50 cm3asid sulfurih L0 mol dm-3 [Relativeatomicmass: O, 16 ;5,32 ; Zn, 65] [Jisim atom relattf : O, 16 ; S, 32 ; Zn, 65J 6.50g 8.05g 11.45g 1 6 . 1 0g

A B C D

Which of the following arethe usesof photochromicglass? Antara berihtt kegunaankacafotol+romik? I U III rV A B C D 47

Opticallenses. Kanta cermin mata Windowsglass Kaca tingkap pejabat Carwindshields Cerminpenghadangangin kereta Volumeticflask Kelalang volumetrik I and II only III and IV only I, II and III only II, III and IV only

Table3 showsthe volumeof hydrogengasliberatedwhenexcessmagnesiumpowderreactswith 25 cm3of 0.1 mol dm-3of hydrochloricacid Jadttal 3 menunjukkanisipadu gas hidrogenyang dibebaskanapabila serbuk magnesium berlebihanbertindakbalas dengan25 cm3asid hidroklorik 0.1 mol dm-3. Time/ min Masa/ min Volume of hydrogen gas / cmj hipadu gas hidrogen/ cm3

0

I

2

a J

4

5

0.0 15.0 25.0 30.0 3 3 . 0 3 3 . 0 Table3 Jadual 3

What is the averagerateof reactionin the third minute? Berapakahkadar tindak balaspurata dalam minit ketiga? A 0.067cm3s -r B 0.083cm3s -l C 0.110cm3s -1 D 0.167cm3s -r

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Propanolreactswith ethanoicacid in the presenceof concentated sulphtnicacidto form compowd Z. Propanol bertindak balas denganasid etanoik dalam kehadiran asid sulfurik pelmt bagi menghasilknnsebatianZ. Whatis the nameof compoundZ. Apaluh namq sebatianZ A B C D

49

Ethanoicacid Asid etanoik Potassiumpropanoate Kalium propanoat Propyl propanoate Propil propanoat Propylethanoate Propil etanoat

2.8 g of iron reactscompletelywith copper(II) sulphatesolutionto displacecopper.7.5 kJ of enerryis givenout. 2.8 S ferum bertindak balas lenglmpdenganlarutan lruprum (II) sulfat bagi menyesarknn htprum. 7.5 hI tenagadibebasknn. of copper? What is the valueof heatof displacement Berapalrnhnilai habapenyesaranbagi hryrum? I Relativeatomicnurss;Fe, 56; Cu 6a ] I Jisim atom relatrt Fe, 56; Cu, 64 J + 150.0kJ mofl A + 171.4kJ mof' B C - 150.0kJ mofr D - 171.4kJ motl

50 The heatof combustionof ethanolis -1376kJ mol-r. Habapembaknranetanol ialah -1376 kJ mol'|. What is the massof ethanolusedto heat 150 cm3of water,by increasingthe temperatureof 30.00c. Berapalrahjisim etanol yang digunakanuntuk memanaskan150 cm3air denganlrcnaiknn suhu sebanyak30.0 oC. : I Relativemolecularmass; ethanol; 46, specificheatcapacityof water 4.2 Jgtoc-tf : I Jisim molehtl relatif ; etanol; 46 , muatanhaba tentu bagi air 4.2 Jg'r"g-t, A B

0 . 31 8g 0.632g

C D

6.920s g 10.615 EI\[D OF''QI]ESTION PAPER KERTAS SOAI.AN MMAT

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INFORMATION FOR CAIIDIDATES fuTAKLAI}IATUNTUK CALON I.

This questionpaperconsistsof 50 questions. Kertas soalan ini mengandungt50 soalan.

2.

Answerall questions. Jawab semua soalan,

3.

Answereachquestionby blackeningthe correctspaceon the answersheet. Jawab denganmenghitamlmnruanganyang betul pada kertasjmvapan.

4.

Blackenonly one spacefor eachquestion. Hitamlwn satu ruangan sahaja bagi setiap soalan.

5.

If you wish to changeyour answer,erasethe blackenedmark that you havemade. Thenblackenthe spacefor the new answer. SeHranyaanda hendakmenulmrkanjowapan, padamkantanda yang telah dibuat. Kemudianhitamlwnjowapan yang baru.

6.

The diagramsin the questionsprovidedarenot drawnto scaleunlessstated. Raiahyang mengiringi soalan tidak dilukislmn mengihtt slwla kecuali dinyatalwn.

7.

You may usea non-progammable scientificcalculator. Anda dibenarlan menggunalwnknlkulator saintifik yang tidak boleh diprogram.

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SI.ILIT 454u2 Percubaan SPM Chemistry 2009 Paper2 ZYzhouts

NAMA: NO. ANGKA GILIRAN:

PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

CIIEMISTRY Paper 2 Two hours and thirtv minutes JANGAN BUKA KERTAS SOALAII INI SEHINGGA DIBERITAHU

l.

TtrliskanNamadanAngl€ Giliran andapadanxmganyang disediakan.

2.

Kertassoalanini adalahdalamdwibahasa.

3.

Soalandalam BahasaInggerismendahului soalanyangsepadandalamBahasaMelayu.

4.

Calondibenarkan menjawabkeselurulran atau sebahagiansoalan samadadalam Bahasa InggerisatauBatrasaMelayu.

5.

Untuk KegunaanPemeriksaan Kod Pemeriksa: Bahagian

A

Calon dikehendakimembacamaklumatdi halamanbelakangkertassoalanini. B C

Soalan I

Markah Markah Penrtr Diperolehi 9

2

9

3

9

4 J

10 t2

6

l1

7

20

8

20

9

20

t0

20 Jumlah

This questionpaper consistof 19 printed pagesand I unprinted page

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SI.]LIT SectionA Bahagian A [60 marks] [60 markah] ao*.. all questionsin ttris section. Jautabsemaa soalan dalam balwgian ini.

Diagram1.1 showsthe soapanionwhich consistof trvo parts,part A and part B. Rajah I.I menunjuklan anion bagi sabunyang mempunyaidua bahagian, bahagianA dan balngian B

o tl i_l

" ' " " " \ - ' c . - ." ,

q" A

B Dagraml.l Rajah1.1

(a) G) Statethe nameof parts : Nyatalwn nama bagi bahagian : A:

B: 12marksl [2 marlwhJ

G)Which part is solublein water?

Bahagian manalcahyang larut dalam air?

ll markl ll marlwhl GDA soapanionis not effectivein had water. Sabuntidak berkesandi dalam air liat. Statethe nameof ion presentsin hardwater? Namalwn ion yang hadir dalam air liat?

I marlcl fl marlwhl

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(b) Diagram1.2 showsthe labelof margarinewhich is on salein Ahmad slrop. Gambarajah 1.2 di bawah menunjukkanlabel pada marjerin yang dijuat di kcdai Ahmad.

CREAn||Y NilAltGiAR,T}rF, IhI(3REDIEhITS : Palrn OiI , Palrrr l(ernel Oil, Lechitin hoductby, Lb€st Cmpng

ExpiryDatel0l0?010

Diagram1.2 Rajah1.2

G) Basedon the informationin Diagram1.2, Namethe food additiveusedin the margarine. Berdasarkanmaklumatdalam rajah 1.2, Namalcanbahan tambah malwnan dalam marjerin tersebut.

I marlfl ll markahl G) Statethetunctionof foodadditivein (bxt. Nyatakanfungsi bahantambahmalwnandalam(b)(r.

ll markl [l marlwhl GDGiveanotherexampleof food additiveswtrichhasthe samefunctionas in (b)(ii). Berilrnn satu contoh lain bahan tambah makananyang samafungsinya seperti di @(ii).

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Ali takestanquilizersunderdoctor'sprescription. Ali mengambiltrankuiliser denganpresltipsi doWor. medicinesare dividedinto ttree categoriesbasedon the symptoms. C) Psychotherapeutic Statethe categoryof fianquilizersin psychotherapeutic medicines? Wat psikoteraputik terbahagi kepadatiga kntegori berdasarkangejala tertentu. Nyatalwn kategor i ubat p sikoteraputik bagi tranlcuiliser?

ll markl I markahl G) Whathappensif Ali takestanquilizersin excess? Apalrahyang terjadi jilu Ali mengambiltranlatilizer secara berlebihan?

ll markl I marlmhl Table2 showsthe numberof subatomicparticlesof atomsP and Q. Both P and Q ue isotopes of the sameelement Jaduol 2 menunjukknnbilangan zarah sub atom bagi atom P dan Q. Kedua-duaP dan Q adalah isotop bagi unsuryang sama. Atom

Number of Protons Bilangan proton

Number of Neutrons Bilangan neutron

Number of Electrons Bilangan elektron

P

6

8

6

a

6

6

6

Table2 Jadual 2 (a)

C) What is the meaningof isotopes? Apalah yang dimaksudkandengan isotop?

ll markl ll marlwhl

CDStateone usageof P. Nyatalrnnsatu kegunaanP

ll markl ll markahl

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(b) What is the nameof the positively chargedsubatomicparticle found in the nucleusof an afiom? Apakah nama zarah subatomyang bercaspositif yang terdapat dalam nukleussuatu atom?

fi markl ft markahl (c)

Statettre numberof valenceelectonsof atomP. Nyatalrnnbilangan elektron valens bagi atom P

fi markl ll marknhl @

Writethe standard representation of oneof theisotopes abovein the form of i X . Tuliskanperwakilanpiawai bagi salahsatu isotopdi atasdalambefiuk

t X ll markl ll markahl

(e) Magnesiumreactswith oxygento form a compourd. Magnesiumbertindakbalasdenganoksigenuntuk membentuksuatu sebatian. 0) Write a balancedchemicalequationfor the reaction. Tuliskanpersamaankimia yang seimbangbagi tindakbalastersebut

[2 marks] 12 markahl

G)Draw the electon arrangementfor the formationof the compound. I ProtonnumberMg:12 ; O:8 ] LuHslransusunanelehron bagi pembentuknnsebatianitu. I Nomborproton Mg:12 ; O:8 J

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Table3 slrowsthe pH valueof four solutionsW, & Y and Z wrthconcentationof 0.1 mol dmr Jadual 3 menuniukknnnilai pH bagi empatlarutan W, X, Y clanZ yang berkepepatan 0.1 mol dm;. Solution Larutan

pH valtre Nilai oH I

X

5 7

w Y Z

t4 Table3 Jadual 3

(a) Basedon the informationin Table3, Berdasarlwnmaklumatdalamjadual 3, G) Which solutiontums a blue litnus paperto red? Larutan manalcahdapat menukarkankertas litmus biru kepadamerah?

ll mark) ll markahl (i) Wthout uslngan indicator,describea chemicaltestto verify the answerin (aXr). Tanpamenggunakansuatupenunjulc,huraikan satu ujian kimia untuk mengesahkan jawapan dalam (a)(t).

12marlal 12markahl (if Which solutionis a stong acid? Larutan manakahmerupakansuatu asid kuat?

ll markl ll markahl (b) z reactswith sulphuricacidto form sodiumsulphateand water. Z bertindakbalas denganasid sulfurik untuk menghasilknnnatrium sulfat dan ain () Statettre ttane of Z. Nyatalmn nama bagi Z.

ll marlQ ll markahl

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(i) Write a balancedchemicalequationfor the reaction. Tulislranpersamaankimia seimbangbagi tindak balas itu.

[3 marks] [3 marlmh] (c)

By referringto Table3, which solutionpossiblycanbe sodiumsulphate? Dengan meruiuk Jadual 3, larutan manakahberkemungkinannatrium sulfat?

ll markl fi marknhl Diagram4 showsa simplecell usingzinc and copperas the electodesand blue solutionof X as the elecftolyte.The readingof the voltneter is 1.8V. Raiah 4 menuniukkansatu sel ringkas menggunakanzink dan kuprum sebagai eleknod dan larutan biru X sebagaielektrolit.Bacaanvoltmeterialah I.8V Voltrneter

Copperrod Rod Kuprum

Znc rcd Rod Zink

Blue solutionof X Larutan biru X

Diagrarn4 Rajah 4 (a) h Diagmm4, showthe directionof the flow of electons. Dalam Rajah 4, tandalranarah aliran eleloron.

ll markl ll narkahl (b) Which metalreactsas the negativeternrinal? Logam yang manalmhbertindak sebagaiterminal negatiJ?

ll markl } marlmhJ (c)

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Whatis the enerry changein the cell above? Apalrahperubahan tenagadi dalam sel di atas?

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(d) Namethe ion that givesthe blue colourof solutionX. Namakanion yang memberikanwarna biru larutan X.

ll markl ll markahl (e)

G) After a few minutes,the copperrod becomesthicker.Give a reason. Selepasbeberapaminit, rod laryrum menjadi tebal. Berikan satu sebab.

ll nark) fl marlcahl

c)Write a half equationfor yotr answerin (exl).

Tulislransetengahpersamaanbagijowapan anda di (e)(i).

ll markl $ narkahl (/)

G) Statethe changein the readingof the volfineterif zinc rod is reptacedby magnesium rod. Nyatalcan perubahanyang berlaht kepadabacaan voltmeterjilca rod zink diganti denganrod magnesium?

ll markl I markahl (i) Explainyouranswerin (r(t. jawapanandadi (fl(i). Jelaslran

12marksl 12markahl

@) Write the over:allionic equationfor the cell. Tttlislran persarnaanion lceseluruhanbagi sel

II markl ll marlwhl

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Two setsof experimentare carried out to study the effect of catalyston the rate of reaction betweenzinc and sulphuricacid. Dua set eksperimendijalankan untuk mengkaii lcesanmangkin terhadap pndar tindak balas antara zink dan qsid sulfurik Reactants Bahan tindak balas

Totalvolumeof gas collectedin 3 min$es /cm3 Jumlah isipadu gas yang dilatmpullrandalam 3 minit /cm3

Temperature

/"c

SuhufC

25.0 cnf of 0.1 mol dmr sulphuricacid * excess gradafed zinc. 25.0 cm3asid sulfurik berlrepekatan 0.1 mol dma + Iretulanztnk berlebihan. 25.0cm3of 0.1 mol dm3 sulphuricacid + excess grarulatedzinc + 5 cm3of 1 mol dmi copper(Il) sulphatesolutionas a catalyst. 25.0 cmsasid sulfurik berlrepelratan 0.1 mol dmr + lretulanzink berlebihan + 5 cm3larutan fuprum(Il) sulfat berkepelcatanI mol dm-3 sebagai mangkin.

s2.0

I

ro.o

Table5 Jadual 5 (a)

Whatis the meaningof catalyst? Apalrahyang dimaksudlmndenganmangkin?

fl markl ll markahl

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(b) Draw a labelleddiagramto slrowthe set-upof apparatrsfor the experiment. Lukis raiah berlabel untuk menunjukknnsusunanradas bagi eksperimenitu.

12marksl 12marlmhl (c) Writea chemicalequation for thereactionbetween zincandsulphuricacid. Tttlislranpersamaankimia bagi tindakbalasantarazink denganasid sulfurik 12marksl 12markahl @

Calculatethe ma,rimumvolune of gasproducedin e4perimentI. Hitunglan istpadu maksimumgas yqng dihasillwn dalam eksperimenI. I I mol of gasoccupies24 dm3at room condition] I I mol gas menempati24 dm3pada keadaanbilik J

12marks] 12markahl

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(e) By rcferringto the dalan llable 5, calculatethe averagerate of reactionfor the first tl'ee minrtes for ocperimentI and orperimentII. Dengan meruiuk kepada data dalomjadual 5, hitung kadar tindak balas purata bagi tiga minit pertama untuk eksperimenI dan eksperimenIL O gryerlmentI EksperimenI

II ff Experiment Eksperimen II

12 marlcsl p. narkahl (i| Comparethe averagerate of reactionfor the first three minutesof ExperimentI and ExperimentII. Explainhow catalystaffece the rateof reactionby usingthe collisiontheory. BandingltanImdar tindak balas purata bagi tiga minit pertama untuk Epsperimen I dan EksperimenII. Tbranglmnbagaimana mangkin mempengaruhikadar tindbk balas menggunapan teori perlanggaron.

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Diagnm 6 showsthe flow chartfor the chemicalreactionsof CrI{. Rajah 6 menunjuklcancarta alir tindak balas kimia bagi CtH,

Hro

+ CI,

CatalystP 3000C,60 atn Manskin P

3oucl 6o atm ReactionI Tindakbalas l

Ethyl propanoate Etil propanoat + Water Air Diagram6 Rajah 6 Basedon diagram6, BerdasarlranRajah 6, (a)

Statettre nameof reaction1. Nyataknn nama bagi tindak balas L

II marlcl ll markahl (6)

Statethe nameof catalystP. Nyatalrannama bagi mangkinP.

ll markl ll narkahl (c)

Statethe nameof the compourdX whenCrHureactswith chlorine. Nyatakannama sebatianX apabila Cflo bertindak balas denganklorin.

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compoundz is an {cohol and canbe producedfrom fermentationprocess. SebatianZ merupalmnsuatu alkohol dan boleh dihasilkan melalui prosespenapaian. write the chemicalequationfor a completecombustionof compoundZ. rblislran persamaanki.miabagi pembakaranlenglap sebatian Z,

12marksl 12markahl (e) G) haw the sfirch'al formtrlaeof two isomersof compoundy Statethe nameof the isomers. Lukislwnformula struktur bagi dua isomer sebatian y Nyatakan nama bagi isomer-isomeritu.

14 marksl [4 markah] (i) CompoundY undergoes oxidationreactionby usingacidifiedpotassiummanganate (Vtr), Klvftrq solution. Statettre observationfor the reaction. Sebatian Y menialani tindak balas pengoksidaandengan menggunalcan larutan lulium manganat(VII), KMnOoberasid. Nyatalcanpemerhatian bagi tindak balas itu.

ll markl ll narlwhl

U)

Statethe homologousseriesfor ethyl propanoate. Nyatalrnn siri homolog bagi etil propanoat.

ll marlcl ll marlwhl

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SectionB Bahagian B 120marksl 120marlcahl Answerany one questionfrom this section. Jowab mana-manasatu soalandaripadabahagianini. (a)

Describethe mechanismof rusting. Your descriptionshould include the followings: Huraikan melmnismaPengaratan' Hur aian anda hendaklah mengandungip erlrara-perkara berikut o

a labelled diagram rajah berlabel

o

half equationsthat take place at the positive terminal (the edge of water droplet) and the negativeterminal setengahpersamaan yang berlaku pada terminal positif (pada hujung titisan air) dan terminal negatif'

l7 marksl [7 marknh]

(D) Explainthreemethodsto preventrusting. Teranglmntiga kaedahmencegahpengaratan.

(c)

13marksl 13marlmhl

Threecleaniron nails werecoiledwith differentmetals,P, Q and R. They wereplacedin test tubesas shownin the Diagram7. thrce separate Tiga paht besi yang bersih telah dililit denganlogam P, Q dan R . Ketiga-tiga paht besi telah dimasukkanke dalam tiga tabung uji yang berasinganseperti yang ditunjukkan dalam Raiah 7.

Iron nail Paku besi

Metal P Logam P

Metal Q Logam Q

Iron nail Paku besi

Metal Logam

(trI) solution+ phenolphthalein Jelly solution* potassiumhexacyanofenate Larutan jeli + larutan potassiumhel<sasianofeftat(Ill + fenolftalein

Diagram 7 Rajah 7

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Table7 showsthe observationsobtainedafter a few days. Jadual 7 menunjukknnpemerhatianyang diperolehselepasbeberapahari. Testtube Tabunguji

Observation Pemerhatian

A More blue and pink colourations surroundedthe iron nail. Banyak warna biru dan merah jambu kelihatan di sekeliling palat besi.

B Pink colouration surroundedthe iron nail. Warna merah jambu kelihatan di sekeliling palat besi.

C A few blue and pink spots sunoundedthe iron nail. Sedikit tompok biru dan merah jambu kelihatan di sekeliling paku besi.

(t) Explainwhy thereis a differencein observations for everytest tubeA, B and C. Terangkanmengapaterdapatperbezaandalampemerhatianbagi setiap tabunguji A, B dan C. (ii) Arrangein ascendingorderthe electropositivityof metalsP, Q, R and iron. Susunsecaramenaikkeelehropositifanlogamn Q, R dan besi. ll0 marlcsl |0 marlmhl

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Table8 showsthe protonnumberand nucleonnunrberof atom of elementsQ and R Jadual 8 menunjuklmnnomborproton don nombornukleonbagi atom unsur Q dan R. Atom

0 R

protonntrmber nomborproton

nucleonnunber nombor nukleon

9 6 Tiable8 Jadual 8

l9

L2

of atomsQ and R. (a) G) Write the electronarrangement Tuliskansusunanelectron bagi atom Q dan R.

f2 marlal 12markahl G) Statethe ntrmberof neutons andnumberof electonsin atom Q. Nyatalwn bilangan neutron dan bilangan elehron bagi atom Q' [2 marks] 12 markahl (b) The reactionbetweenQ and R forms a compound. Describethe formationof the compound. Tindak balas di antara Q dan R menghasilkansatu sebatian. Hurailranpembentulansebatianitu' 18marlal 18 narkahl (c)

Statetlre changeof the reactivityof Group 1 and Group 17 elementsin the PeriodicTi$le wtrengoingdown the grouP. Explainyorrranswer. Nyatakanperubahan kereahifan unsur-unsurkumpulan I dan lrumpulan17 dalam Jadual Berkala (Jnsurapabila menurunikumpulan. j awapan anda. Teranglcan

l8 marlnl [8 marlwhl

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SectionC Bahagian C 120marksl 120markahl Answerany one questionfrom this section. Jawab mana-manasatu soalan daripada bahagian ini. 9

(a)

Sals arewidely usedin variousfields. Nameone exttmpleof saltand stateits usesin eachof the following fields: Garam digunakansecara meluasdalampelbagai bidang. Berikan satu contoh garam dan nyatakankegunaannyadalam bidang berihtt:

G)

pertanian (ii) food preparation penyediaan makanan (if medicine perubatan 16marksl 16markahl (b) Describehow to preparesalt from copper@ sulphatesolution. Terangkanbagaimanamenyediakangara.mdaripada larutan hryrum(Il) sulfat. 14marksl 14 markahl (c)

You are requiredto preparedry zinc sulphatesalt. The chemicalsubstances tlrat areprovided: Anda dikehendakimenyedialcan garam zink sulfat yang kering. Bahan-bahankimia yang dibeknlkan: zinc nitratesolution larutanzink nitrat sodiumcarbonatesolution Iarutan natrium karbonat

Dilute sulphuricacid Asid sulfurik cair necessary apparatus radasyang sesuai

By choosingthe correctsubstances and apparatus,describea laboratoryexperimentto prepaxedry zinc sulphatesalt. In your description,includechemicalequationsinvolved. Dengan memilih bahan-bahandan alat radas yang betul, huraiknn satu el$perimen makmal untuk menyediakangaram zink sulfat yang kering. Dalam huraian anda, nyatakanpersomaan-persamaan kimia yang terlibat. |0 marlal |0 markah|

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(a) Whatis the meaningof 0 exothermicreaction reaction? (i) endothermic contentof the reactantsand productsfor both reaction. energy Statethe ApakahYang dimalaudknn dengan (i) tindak balas eksotermik (ii) tindak balas endotermik? Iiyatapnn lcandungantenaga bahan tindak balas dan hasil tindak balas bagi keduadua tindak balas. 14 marksl 14 marlmhl (b) Diagram10 shows an ener5rlevel diagramfor a chqnical reaction. Rajah I0 menunjukknngambar rajah aras tenagabagi satu tindak balas kimia. Energg Tenaga AH=+xkJmol' r

Diagram10 Rajah I0 Statefour informationsthat canbe obtainedfrom the enersf level diagram. Nyatalwn empat maklumatyang dapat diperoleh daripada gambar raiah aras tenaga itu. 14 narksl 14 marlwhi (c)

Describea laboratoryexperimentto determinethe heatof combustionof a namedalcohol. strouldincludetlre followings: Yourexplanation makrnaluntuk menentukanhabapembakaransuatu alkohol Huraipansatu el<sperimen yang dinamaknn. Penerangananda perlu mengandungiperkara berihtt: o hocedr.reof exPeriment Prosedurel<sPerimen o Result Keputusan o Calculation Pengiraan

ll2 narksl ll2 narlwhl

Er\D OF QUESTIONPAPER KERTASSOAI./IN TAMAT 454u2

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INT'ORMATION FOR CAI\DIDATES II'IAKLU]}AT UNTAK CALON l.

This questionpaper consistsof three sections:SectionA, Section B and Section C. Kertas soalan ini menganduytsitiga bahagian:Bahagian A, Bahagian B dan Bahagian C

2.

Answer all questiozsin SectionA. Iil'riteyour answersfor SectionA in the spacesprovided in the questionpaper Ja'wabsetnuasoalan dalam Bahagian A. Tulisjawapan bagi Bahagian A dalam ruang yang disediakandalam kertas soalan ini.

3.

fuiswer one questionfrom SectionB and one questionfrom SectionC. Write your answersfor SectionB and SectioinC on the lined pagesat the end of the question paper.Ansner questions in SectionB and SectionC in detail.You may usequestions,diagrams,tables,gfaphsand other suitablemethodsto explainyour answer. Jawab satu soalan daripada Bahagian B dan satu soalan dari Bahagian C. Tulisjnvapan bagi Bahagian B dan Bahagian C pada helaian tambahanyang dibekalkanoleh pengcMas peperiksaan.Javtab soalan dalam Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunaknnpersamaan, rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskanjawapan anda.

4.

Showyour working. It may help you to get marks. Tunjulrlrankerja mengira. Ini membantuanda mendapatkanrnarkah.

5.

If you wish to cancelany answer,neatlycrossout the answer. Sekiranya anda hendak menular jm'vapan, batalkan dengan kcmasjmtapan yang telah dibuat. Kemudiantulis jawapan yang baru.

6.

The diagramsin the questionare not drawnto scaleunlessstated. Rajahyang mengiringi soalan tidak dilukis mengihtt skala kpcuali dinyatakan.

7.

Marks allocatedfor eachquestionor part questionare shownin brackets. Marlrah yang diperuntuklcanbagi setiap soalan atau ceraian soalan ditunjukkan dalam htrungan.

8.

The time zuggested to answerSectionA is 90 minutes,SectionB is 30 minutesand SectionC is 30 minutes Masa yang dicadangkan untuk menjawabBahagian A ialah 90 minit, Bahagian B ialah 30 minit dan Bahagian C ialah 30 minit.

9.

You may usea non-progarnmable scientificcalculator. Anda dibenarlwn menggunakankalhtlatur sainti/ik yang tidak boleh diprogram.

10. Handin this questionpaperat the end of the examination Serahlrankertasjawapan anda diaWtirpeperiluaan.

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454u3 Chemisfi Kertas 3 Peperiksaan Percubaan 2009 1%hours

NO. ANGKA GILIRAN:

PEPERIKSAAN PERCUBAAN SIJIL PELAJARAN MALAYSIA NEGERI PERAK 2009

CHEMISTRY KIMIA PAPER3 KERTAS3 Onehour andthiny minutes Satujam tiga puluh minit

JAIIGAN BUKA KERIAS SOALA}I INI SEHINGGA DIBERITAHU

1.

TuliskanNAMA dan AITIGKAGILIRAN andapada ruang yang disediakan.

2.

Kertassoalan ini adalah dalam dwibahasa

3.

Soalan di bahagian atas adalah dalam bahasaInggeris dan di bahagianbawah adalah dalam bahasaMelavu.

4.

Calon dibenarlmnmenjow-abkeseluruhan atau sebahagiansoalan sama ada dalam bahasaInggeris atau bahasaMelayu.

J.

Calon dikehendakimembacamaklumatdi halamanbelalwngkertassoalan ini.

KegunaanPemeriksa No soalan

Markah Penuh

I

33

2

t7

MarkahDiperolehi

Jurnlatr

Kertas soalanini mengandungi8 halamanbercetak

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A shrdenthascanied out an experimentto comparethe hardnessof bronzewittr its pure metal, copper. The experimentwas caniedout accordingto the following steps: Seorangpelajar telah menjalanlmnsatu eksperimenuntuk membandingkankekprasangangsa denganlogam tulennya, htprum. Eluperirnen itu dijalankan rnengihtt langkah-langkahberihtt: Step I Langkah I

Cellophanetapewas usedto stick a steelball bearingonto the copperblock. Pita selofen digunakan untuk melekatkanbebola keluli di atas bongkah kuprum.

Step2

A one-kilogramme weightwashangedat a heightof 50 cm abovethe ball bearing as shownin Diagram1.1 Pemberatsatu kilogram digantungpada.ketinggian 50 cm di atas bebola lreluli itu seperti yang ditunjukkandalam Rajah 1.1

Langkah 2 Step 3 Langkah 3

The weight was droppedso that it hit the ball bearing. Pemberatitu dijatuhlcansupayamenghentambebolakeluli tersebut.

Step4

The diameterof dent madeon the copperblock was measuredand the reading was recorded. Diameter lekukyang terbentukpada bongknhkuprum diukur dan bacaanrrya direlndkan.

Langkah 4 Step 5 Langkah 5 Step6 Langkah 6

Step I to step4 was repeatedtwice on the other parts of the samecopperblock in orderto obtainthe averagediameter. Langkah I hingga 4 diulang sebanyakdua kali lagi atas bahagian lain bonglmh htprum yang sama untuk mendapatkan purata diameten Step I to step 5 was repeatedby replacingthe copper block with the bronze block. Langlmh t hingga 5 diulang denganmenggantikanbongkah htprum dengan bonglrahgangsa.

Thread Benang Weight Pemberat

Steel ball bearing Bebola keluli

Copperblock Blok kuprum

Diagram1.1 Rajah1.1

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Diagmm1.2 showsthe shapeof dentsformedfor the Rajah L2 menunjukkanbentuklelrukyang terbentukbagi eksperimenitu. Steelball bearing Bebola keluli Crosssectionview Pandangansisi Copperblock Bonglrah htprum Top view Pandangan daripada atas

Diagnm 1.2 Rajah 1.2 Diagram1.2(a)showsthe top view of dentsfor the tluee resultson the copperblock. Rajah 1.2(a) menunjuklanpandangan atas lefuk bagi tiga keputusanyang terhasil di atas bonglah htprum. Dent I

LetukI

DentII Letuk II

DentIII Letuk III

D i a m e t e: r.............cm

: .............cm D iameter

Diam eter : ........... ..c m

Diagram1.2(a) RajahL2 (a) Diagnm 1.2(b)showsthe top view of dentsfor the threeresultson the bronzeblock. Rajah 1.2(b) menunjuklmnpandangan atas lelatk bagi tiga keputusanyang terhasil di atas bonglrahgangsa. DentI Letuk I

DentII Lelatk II

Dent III Letuk III

n D i a m e t e: r.............cm

D iameter : .............cm

Diam eter : ........... ..c m

Diagram1.2(b) RajahL2 (b) (a)

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By using a rulel measurethe diameterof dentsand recordin the spacesprovided. Dengan menggunakanpembaris, uhtr diameter lelwk dan catatkanpada ruang yang disediakan. 13marksl 13narkahl [Lihat sebelah ST]LIT

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(D) Constructa tableto recordthe diameterof dentsformedon copperblock andbronzeblock Bina satujadual untuk merelad diameter lefuk-lefuk yang terbentukpada bonglah htprum dan bongkahgangsa.

[3 marlcsl [3 markahl (c)

Calculatethe averagediameterof dentsor\ Hitungknn nilai purata diameter lefuk pada, G) Copperblock Bonglcahhtprum

(i) Bronzeblock Bongkahgangsct

[3 marksl 13markahl fromthis experiment . (d) G) Stateoneobsenration thatcanbe obtained yang pemerhatian ini dapatdiperolehdaripadaeksperimen Nyatakansatu

13marksl 13marlcahl G) What is your inferencebasedon yow answerin (d) (i) . Apalwh inferensanda berdasarkanjavvapananda dalam (d)(i).

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4541/6 (if Explainyour drswerin d(ii) accordingto the arrangement of particlesin the mdedals. Teranglcanjawapan anda dalam d(ii) berdasarkan susunon zarah-zarah dolam bahan-bahanitut.

13marksl [3 markahl (e)

For this experiment,strate: Bagi elrsperimenini, nyatalwn : variable 0) The manipulafed Pembolehubah dimanipulasi lan

(ii) The variable Pembolehubahbergerakbalas

(iii) ltrc fixed variable Pembolehubahdimalarlmn

13marlcsl 13markahj (l)

(D Stateone hypothesisfor this experiment. Nyatakansatu hipotesis bagi eksperimenini.

13marksl 13narkahl definitionfor this experiment GDBasedon Diagmm1.2,statetheoperational

ini. Rajah1.2, nyatakandefinisisecaraoperasibagi eksperimen Berdasarlran

13marksl 13narlahl

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6 The following,isa list of substances: , Berihtt ialah serarai beberapabahan : kon Besi Loyang Brass

Steel Keluli

Chromium Kromium

Pewter Pewter

Tin Timah

Classifythesesubstances into alloy andpuremetal. Kelaslwn bahan-bahanini lcepadaaloi dan logam tulen.

[3 marksl 13 marlwhl (h) The experimentis repeatedby using500 g weightto replaceone-kilogramweight . Predictthe averagediameterof dent on copperblock. pemberat500 g bagi menggantikanpemberat Elaperimendiulang denganmenggunakan satu kilogram. Ramallwnpurata diameter lefuk di atas blok htprum.

[3 marlal 13 marlwhl

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Concentationof ions in tlre electolyes affectthe productof electrrolysis of an aqueoussolution. Kepelratanion dalam eleltrolit mempengaruhihasil dalam elelctrolisissuatu larutan ahteus Plana laboratoryexperiment to investigate ttreeffwt of concentationof chlorideion on the selective dischargeat the anode. Rancang satu eksperimenmakrnal untuk mengkaji kesan kepekatanion klorida dalam pemilihan nyahcaspada anod. Yourplamingshouldincludettrefollowingaspects: Perancangananda hendaklahnengandungi aspek-aspek' berilafi:' (a) Statementof the problem Pernyataanmasalah (6) All the variables Semuapembolehubah (c) Statementof the hlpothesis Pernyataanhipotesis (ra)List of substances and apparatus Senarai bahan dan radas (e) Procedureof the experiment Prosedureksperimen (fl Tabulationof data Penjadualandata

ll7 marksl ll7 narlwhl

ENDS OF QUESTION PAPER KERMS SOAI./IN AT'IAT

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INFORMATION FOR CAI\IDIDATES MAKLUMAT UNTUK CALON

t.

This questionpaperconsistsof two questions: Question1 andQuestion2. Kertas soalan ini mengandungidua soalan : Soalan I dan Soalan 2.

2.

Answerall questions.V/rite your answersfor Question I in the spacesprovidedin this question paper. Javtapan semua soalan. Tulis jawapan anda bagi Soalan I pada ruang yang disedialun dalam lrertassoalan ini.

3.

Write your answerfor Question 2 on the 'helaiantambatran'providedby the invigilaton. You may useequations,diagrams,tables,graphsand othersuitablemethodsto explainyour answers. oleh pengawas Tulisjmtapan anda bagi Soalan 2 dalam helaian tambahanyang dibelcallcan jadual, graf cara lain yang dan peperilrsaan.Anda boleh menggunakanpersamaan,rajah, sesuai untuk menjelaslwnianapan anda.

4.

Showsyour working, it may help you to get ma*s. Tunjulrlranlrerja mengira, ini membantuanda mendapatlan markah.

5.

The diagramsin the questionsarenot drawnto scaleunlessstated. Rajoh yang mengiringi soalan tidak dilukis mengilafislrala kBcuali dinyataknn. The marla allocatedfor eachquestionor sub-partof a questionare shownin brackets. Marlrah yang diperuntuklranbagi setiap soalan atau ceraian soalan dituniuklan dalam kurungan.

7.

If you wish to changeyour answer,crossout the answerthat you have done.Then wite down the new answer. Jila anda hendak menular javtapan, batallan jawapan yang telah dibuat. Kernudiantulis jawapan yang baru. scientificcalculator. You mayusea non-programmable Anda dibenarknnmenggunalwnkalhtlator saintifik yang tidak boleh diprogram.

9.

You are advisedto spend45 minutesto answerQuestion I and 45 minutesfor Question2. Anda dinasihati supaya mengambilmasa 45 minit untuk meniavtabSoalan I dan 45 minit untuk Soalan 2.

10. Handin your answersheetsat ttre endof the exammination. Serahlan kprtasjawapan anda di akhir peperiksaan.

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PEPERIKSAAN PERCUBAAN NEGERIPERAK SIJILPELAJARAN MALAYSIA 2009

SKEMAPEMARKAHAN CHEMISTRY 4541t1 4541t2 4541t3

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SULIT

JAWABAN KERTAS1 : PERCUBAANSPM2OO9

SOALAN JAWABAN 1 D 2 B 3 A 4 5 6

7 8 9

10 11

t2 13 t4 15 l6

A A

B B A C C

D B B C C

c

t7

A.

18

D D

t9 20 2l 22 23 24 25

SOALAN JAWABAN 26 c 27 B 28 A 29 A B 30 31 A B 32 33 D D 34 35 C 36 D 37 C B 38 D 39 40 A 4l c 42 B 43 D

A

D C A A

C

)

44

C

45 46 47 48 49 50

B C

B D C

B

MARKING SCHEME PAPER2 TRIAL EXAM 2OO9

I

No (a)

Answer (i)

(ii)

(b)

(c)

Mark

A hydrophobic// hydrocarbon

I

B an anionic // hydrophilic

I

B // hydrophilic

I

(iii) Calcium/ calcium ion llmagnesium/ magnesiumion

I

(D

Lechitin

I

(ii)

prevent an emulsion from separatingout llmixwater and oil

I

(iiD Mono-glycerides// di-glycerides,

I

(i)

Antidepressant

I

(ii)

Respiratorydiffi culties,sleeplessness, coma,death

I Total 9

(i) Atoms of the sameelementwhich containsameproton number but different nucleon number// Atoms of the sameelementwhich contain samenumber ofproton but different number of neutrons (ii) Estimatethe ageof fossils

t2 cll

14 c

66 2Mg + Oz 2MgO andproducts- I -correctformulaeof reactants

t-,,

1

1+1 -coffectnumberof shellsandnumberof electronsfor Me and O-1 ma rk -correctchargesfor Me andO - I mark 9

Total a J

(a)

(b)

(i)

wllx

(ii)

metalcarbonate stated - W is addedinto sodiumcarbonate/any in a testtube, turnslime watercloudy - Gasreleased // - magnesiumlzincis addedinto W in a testtube, givesa'pop' soundwith a liehtedsplinter - gasreleased

(iii) w (i) Sodiumhydroxide (ii) 2NaOH + HzSO+ --+ Na2SO4 + 2H2O

I l+ l

I I

l+l+ 1

- Correct formulae of reactants - correct formulae of products - Balancedequation

(iii

Y

1 Total 9

4

(a)

ldraw an affow from zinc to copperthrough wirel

I

(b) (c) (d) (e)

zincll Zn

1

Chemical) electrical Copper(Il)ion copperis depositedon the cathode//positive terminal

1

(i)

I

1 (f)

(e)

(ii)

C u '*+2 e )C u

I

(i)

The reading increases.//acceptany suitablefigure more than 1.8

I

(ii)

In electrochemical series,magnesiumis locatedhigher thanzinc. The distancebetweenmagnesiumand copper is further compare to the distancebetweenzinc andcopper,so the voltage increases.

1+1

Z n +g u " t Z n" + Cu - Correctformulaeof reactantsandproducts

1

Total )

l0

(a)

A substancawhichaltersthe rate of chemicalreaction

I

(b)

1. Functionaldi 2.Label

I I

Sulphuric

It

t-P

(c)

7-n + HzSO+ ZnSO++ rh - Correct formulaeof reactants - correctformulaeof products

l+ 1

1.Correctnumberof molof sulphuric acid

I

(d)

0.1x 25.0 1000

ll

0.0025

2. Conectthema:rimumvolume

1

0.0025x24 ll 0.06dm3ll 0.0025x24000 ll 60 cm3 (e)

(D

Experiment I.

I

(ii)

40.0 ll 0.2222cm's-r 180 - Conectanswerwith unit ExperimentII 52.0 ll 0.2889cm3s-r 180 - Correctanswerwith unit

I

(iii)

The averagerate of reactionfor experimentII is higher than experimentI. Catalystreducethe activation energy. More colliding particlesare able to achievethe lower activation energyto increasethe frequencyof effective collision. Total

-l

1 I I

t2

6

(a)

Addition reaction/ hydrationi'eaction

I

(b)

Phosphoric acid

I

(c)

1,2- dichloropropane // dichloropropane

I

(d)

CzHsOH+ 5Oz) 2COz + 3HzO 2 or 2 C 2 H sOH +5 Oz) 4 COz + 6HzO

l+ l

- Correct formulaeof reactants - correctformulaeof products (i)

Propanol/ propan-l-ol

HH

ttl

I

H

Fl-c-c-c-oH

tll HH

I

H

Propan-2..ol''

TI T

I

H-C-C-C-H

J' ,l 'l

(iD

(0

I

purpleto colourless.

I

Ester

I Total

(

11

MARKING SCFIEMEPAPER2 SECTIONB AND C 7

(a)

2

(b)

Negativeterminal/lanode: Fe ) Fe2*+ 2e PositiveterminaVlcathode: 02 *2HzO +4e ) 4OHiron(I[) ionsproducedcombinedwith thehydroxideions to form Fe(OH)z/ iron(Il) hydroxide Fe(OH)zis oxidizedby oxygento form rust/ Fe2O3 x.H2O

I I I I I

(D

I

7

usingprotective coating: oil/ paintlplasticsI galvanizingl tin plating (iD Alloying : stainless steel- carbon* chromium+ nickel (iii) Sacrificialprotection.- iron is attached to the sacrificialmetal which is moreelectropositive thaniron

I 1

-Correctmethodwith example 7

(c)

(i)

(ii)

a J

Potassiumhexacyanofenate(Ilf solution- detectthe presence of iron(Il) ions by giving the blue colour

I

Phenolphthalein- detectthe presenceof OH' ions by giving the pink colour. A : - Iron (II) ions are formed and OH- ions are formed - Iron is oxidizedto iron(Il) ions. - Metal P is less electropositivethan iron

I I I I

B :

- No Iron(II) is formed/ and OH' ions are formed - Iron does not rust. Metal Q is oxidized thus metal Q is more electropositivethan iron

1 I

C :

A liule Irons (II) are formed I andOFf ions are formed. Iron is oxidized. Metal R is lesselectropositivethan iron

1 I

P< Iron < R < Q // P, Iron, R, Q

1

t0 Total 20

1

8

(a)

(i) (ii)

o)

l.Theelectronarrangement of atomQ:2.7112,7 2.The electronarrangement of atomR:2.4112.4 l.The numberof neutronsin atomR is 6 in atomO is 9 2.Thenumberof electrons 1.QandR form covalentbond. 2.AtomQ hasanelectronarrangement of 2.7112,7 3.AtomR hasan electronarrangement of 2.4112,4 4.Toachievethe stableelectronarrangement, [atom]R shareselectronswith [atom]Q. 4 electrons. 5.One[atom]R contributes 6. Each[atom]R contributes oneelectron. 7. [Atom] R sharesfour of its valenceelectronseachwith 4 atomsof Q 8. moleculewith the formulaRQa.

'@l @

1+l

2 1+1

2 I I I I

I I I I

6 [c)

:E

Notes: points4,7 and8 canbeobtainedfrom the diagram (c)

For group I elements. 1. Going down the group ,atomic size increases//the valenceelectronbecomesfurther away from the nucleus 2. Forcesof attractionbetweenthe protons/ nucleusand the valenceelectronbecomesweaker. 3. It is easierfor the atom to donate/ releasethe valence electrons. 4. The reactivity increasesdown the group //

8

I I I 1

reactive Reactivity increaseslN4ore

Lithium,Sodium,Potassium,Rubidium,Caesium,Francium// I L i ,N a , K, Rb, Cs, Fr For Group17elements. whendescending the group//the I l.Atomic sizeincreases valenceelectronsbecomefurtherawayfrom nucleus. I 2. Forcesof attractionbetweentheprotons/ nucleusandthe valenceelectronsbecomeweaker I 3.It is moredifficult for theatomto acceptlgainheceive electrons. downtheGroup// I 4.Thereactivitydecreases

\

0

Reactivityincreases/\4ore reactive Fluorine,Chlorine,Bromine,Iodine,Astatine

8

max Total 20

No.

e (a)

Answer CuSOe // FeSO+llHgCl - usedaspesticides to destroypests

Marks l+ 1

(ii)

Sodium chloride - to add flavour to food // . Sodium hydrogencarbonate- usedin baking cakesand breads

l+ 1

(iii)

calcium sulphatesesquihydrate- usedto make cernentcaststo encasefracturedbones. Barium sulphate- usedon X-ray platesto identify tumours in the intestines. (Acceptother relevant answers)

(D

2 2

(b)

- heatthe solutionuntil a saturatedsolutionis produced. - cool it to the room temperature - filter the crystal formed - dry the crystal by pressingit with the filter paper.

(c)

Pour [20-100]cmiof zinc nitratesolution@ beaker Add [20-100]cm3of sodiumcarbonatesolution[0.1-1.0]moldm-3 Filter the mixture Pour [20-100]cm3dilute/[0.]-1.0]moldm-3sulphuricacid into a beaker Add the residue/precipitateinto the acid until in excess Stir and filter the mixture Heat the filtrate until saturatedI ll3 of original volume Cool the saturatedsolution Filter and dry the crystal Zn(NO3)2 + Na2CO3 + ZnCOt + 2NaNOr ZnCOt + HzSO+ + ZnSO+ + HzO + COz

1+ l

I I I 1

4

10

max

Total

Ll

I

20

No.

Mark

Markine Scheme

l0 (a) (i) l.Exothermic reaction is a reactionthat releasesheatto the

(b)

surroundings. Z.Theenergycontentof the productsis lower than the energy content of the reactants. (ii) l.Endothermic reactionis a reactionthat absorbsheat from the surroundings. 2.The energycontentof the productsis higherthan the energy content of the reactants. 1. P reactswith Q to form R and S. 2. P and Q are the reactantswhile R and S arethe products. 3. . Heat energyis absorbedllThe reactionis endothermic. 4. Total energycontentofproducts/ R and S is higher than total energycontentof reactants/ P and Q. 5. l molof PreactswithI molQto from l molRand l mol S, x kJ energyis absorbed

I I 1 1

Max (c)

Procedure: l. I nameof alcohol] eg: methanol/ethanol/propanol/butanol. 2. [50 - 250 cm']of water is measuredby usinga measuring cylinder and is poured into a coppercontainer. 3. The coppercontaineris placedon a tripod stand. 4. The initial temperatureof the water is measuredand recorded. 5. A spirit lamp containing I alcohol ] is weighedand recorded. 6. The spirit lamp is placeddirectlybelow the coppercontainer. 7. The wick of the spirit lamp is lighted. 8. The water is stirred using thermometer. 9. When the temperature of water increasesby about [30 "C ], the flame is put off and the highesttemperaturereachedis recorded. 10. The spirit lamp is weighed again. Result: oC 10. Initial temperatureof water = tr oC Highesttemperatureof water: t2 : ( tr -tz) oC: T oC Increasein temperature 11.Massof lamp and [alcohol]beforecombustion: firr g Mass of lamp and [alcohol] after combustion : trrzE Mass of [alcohol] burnt = (mr - mz) g Calculation: 12.Numberof molesof [alcohol]= (mr-JItt = n molar massof [alcohol] 13.Heatchange=250x4.2x T = Q J 14.Heatofcombustion=Q n

J mo l-r ll -Q k J mo l-l nx 1000 Total

1t

t2 20

OUESTION I (a)

ANSWER

SCORE

1 .4 ,1 .5 ,1 .3 0 .9 ,0 .8 ,0 .9

a J

l(b)

Diameterof dent/ cm Copper Bronze 1(c)

I

ll

lll

t.4 0.9

1.5 0.8

0.8

J

1.3

Average diameter a

(i) Copper

: 1.4+ 1.5+ 1.3 : 1.4cm ^

J

(ii) Bronze

0.9+ 0.8+ 0.8 = 0.8cm J

1(d)

(i) The size/ diameterof dentson bronzeblock aresmallerthan the size/ diameterof dentson copperblock llThe sizeI diameterof dentson copperblock arebiggerthanthe size/ diameterof dentson bronzeblock. (ii) Bronzeis harderthancopperll Copperis lessharderthan Bronze (iii) The orderlyarrangement of atomsin copperenablesthe layersof atomsto slideon oneanotherwhenforceis applied.ll In bronze,the presenceof atomsof othermetalsthat areof differentsizesdisturbthe orderlyarrangement of atomsin the metalandits reducethe layerof atomsfrom sliding.

1(e)

l(0

(i) Differenttypesof materials(copperandbronze) (ii) Size/ diameterof dent (iii) Size/ diameterandmassof steelball bearing// heightof the weight// massof the weight (i) Bronzeis harderthancopperll Copperis lessharderthan bronze (ii) Whenthe size/ diameterof dentis smaller.the materialls harder

a J

3

a J

a J

a J

5

l(e) Puremetal

Alloy a J

Iron, Chromium,Tin

lft)

Steel,Brass,Pewter

Lessthan 1.4cm

a J

lr

OUESTION SAMPLE AI\SWER 2 (a) How doesthe concentrationof chloride ion/solution. affect the product at the anode/ electrode?

2(b)

2(c)

2(d)

SCORE a J

Manipulatedvariable : Concentration of chlorideion / solution Respondingvariable : Ion discharged / product( at the anode) Fixedvariable : Type of electrolytelltype of electrode// durationof electrolysis When the concentrationof chloride ion is higher, then the chloride ion will be dischareed

a J

a J

Substances : 1.0mol dm-'of chloridesolution. 0.001mol dm'3of chloridesolution (Any chloridesolution: eg,Hydrochloricacid , Potassium chloride,Sodiumchloride) a J

Apparatus: Batteries,carbonelectrodes, connectingwireswith crocodileclips,electrolyticcell,testtubes, litmuspaperandwoodensplinter. 2(e)

Procedures : (1) An electrolyticcell is filled with 1.0mol dm-3of chloride solutionuntil it is half full. (2) The carbonelectrodesis connected to the batteriesby using connectingwires. (3) Two testtubesis filled with chloridesolutionandinvertedto both of the electrodes. (a) Gasproducedat the anodeis collectedandthe gasis tested with moist litmuspaperandglowingsplinter. (5) The observations arerecordedin the table. (6) StepsI to 5 arerepeatedby using0.001mol dm-3chloride solutionto replace1.0mol dm-' chloridesolution

2(f) Observation 1.0mol dm'' of chloridesolution 0.001mol dm-'of chloridesolution

\L

3