CHEMISTRY SPM KCM Exam Tips 3 ®
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Transcript of CHEMISTRY SPM KCM Exam Tips 3 ®
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SULIT
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. Bagi
set@ s(xrl(m, pilih saUjan'apan sahaia. Hitamkanin+,apan mda pada kertas
jawqan objektfymg 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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SULIT 454u1
A2B3c4D5
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 2
Which element is a halogen?
Unsur manakah adalah suatu halogen?
c
D
APBaCRDS
H
N
I H
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STJLIT
4 What type of chemical bond exist in water, HzO ?
Apakah jenis ilmtan kimia yang wajud dalam air , H2a ?
A Covalent bond
Ikntan kovalenB lonic bond
Ikatan ionik
C Metallic bond
Ifutan logam
D Single bond
Ikatan tunggal
Diagram 3 shows the apparatus set-up for an experiment.
Rajah3 rnemnjukkan susururn radas untuk suatu ekspertmen
4541n
AnodeAnd
Cathode
Kotod
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 naphthalene
Pepejal nofialena
B Hydrochloric acid
Asid hidroHorikC Molten glucose
I*buran glukosa
D Pure ethanol
Etmol 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 value
Asid hnt memputyai nilai pHyang rendah
C A weak acid has a high degree of ionisation
Asid lemah mempnyai kadar pengionanyemg tinggi
D An acid is a chEmical compound that is soluble in water to produce OH- ion
Asid ialah sebdian kimia ywry lantt dalom air menghmilkan ion Abf
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STJLIT 454u1
scbchh
il
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, KNO3
Kalium nitru, KNOrtf,ad 0I) carbonate, PbCO3
P I umb 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
Cement
Simen
SteelwiresWayar keluli
Diagram 4
What arr the characteristics of the material?Apakah ciri<iri bahon tersebuf?
AHigh tensile snength
Ke hratan re gang(m yang t inggiB Hard and brittle
Keras 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 ikan el e Hri k
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SULIT 454u1
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 energJ
P erlanggaran yang mempwryai tenaga kurang daripada tenagapengalctifan
B The collision that has a low energy
Perlongaranyang mempunyat terurya yang rendah
C The collision which takes place before a reaction
Perlangaranyang 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 acid
Asid 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 rusting
Magnesium 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 iron
Magnesium lebih lembut doripada besi
B Magnesium is a good heat conducforMagnesium adalah kandufuor luboyang baik
C Magnesium has a lower melting point
Magnesium mempunyai nkat lebur yang lebih rendoh
D Magnesium is more tendency to release electrons
Magnesium lehih cenderzng untuk membebaskon elelaron
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SULIT
12 Which statement is correct about exothermic reaction?
P e rny atasn m anakah y utg be taI me nge nai I indak b a Iac e ks o t e rm ik ?
AThe reaction absorbs heat from the surrounding
Tindah balas menyerap haba dari persekitaran
B The surrounding temperature decreases
Suhu pe rse kitaran rnenarun
C In this reaction, heat energy is converted to chemical energy
Di 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 Insulin
InsulinB Aspirin
AspirinC Streptomycin
Streptomisin
D Paracetamol
Parasetamol
14 Diagram5 shows the change
ofstate
ofmatter.
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 Freezing
Pembehnn
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 CsHrz
C 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 stale
Terurai kepada unsur juzubtya melalui elektrolisis dalan bentuk leburan
A landllB IandIVC ll and tIID III and IV
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SULIT
l8 Diagram 6 shows the apparatus set-up for an electrolyic cell.
Rajah 6 menunjukkan susundn radas bagi sebuah sel elektrolisis.
Carbon electrodeElektrod karbon
9 454llt
Carbon electrodeElehrod karbon
Copper(ll) sulphate solution
Laru tan kup ru m(ll) s u Ifut
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
Cathode
Kolod
A SOa'- Cu'B Cu2* OH
c 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 dioxide
Bertindak 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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SULIT
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 apabila
dipanaskan dengan lant
Residue after heating is brown when it is hot and yellow when it is cold
Baki yang berwarna perang semasa panos dan hming semasa seiuk
What is salt X?
Apakah garomX?
A Zinc nitrateZink nitrat
B Zinc carbonate
Zink karbonat
C Lead(II) nitrate
Plumbum(Il) nitratD Lead (II)carbonate
Plumbum(ll) karbonat
Diagram 7 shows the arrangement$ of atoms in three substances.
RajahTmenuniukkan susunun otorn-alom dalam tigaienis bahan-
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[Lihat sebeleh
2t
P
Arrange the substances from
Sus 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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SULIT
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 urduk
meneuuksn kadar tindak bslas?
A Change in the temperature of the solution with time
Perubahan suhu larutan dengan masa
B Change in the volume ofcarbon dioxide gas with time
Perubahan isipadu gas lmrbon dioksida dengan masaC Change in the mass of water with time
Perubahon jisim air dengan masa
D Change in the concrntration ofhydrochloric acid with time
Perubahan 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 acid
Asidfosforik
C Sulphuric acid
Asid sulfurik
D Aluminium oxideAluminium oksido
il 4S4Ul
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SULIT 45dut
24 Which of the following are oxidisingagents?Antora berilat yang nstahah agen pengoksidaon?
I Magnesium
Magnesiumil Chlorine water
Air Horintil Potassium iodide solution
Larutan kalium iodidary Acidified potassium manganat{Vll) solution
Larutan 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 , AgNO3
and 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 tindok
balas bagi Wrsamcum kimia ini ?
Heat change
PerubahsthabaType of reaction
Jenis tinda* balas
Heat is released
Haba dibebaslwnEndothermic
Heat is released
Haba dibebaskmrExothermic
Heat is absorbed
Haba diseroExothermic
Heat is absorH
Haba 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 dioxide
Yis + Glukosa + alkolpl + kabon dioksida
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A
c
D
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struT 454llt
27 Tablc I shows the proton number and the number of electrons in four different
particles. 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 number
Nombor oroton
Number of electron
Bilansan elebron
P t7 t7
a t7 l8
R t2 t0
s 8 I
Table I
Which is an anion?
Yang manakah suatu qion?
AP
Ba
CRDS
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 conditionJ
Balnn 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 magnesium
12 gmagnesium
C 16gofoxygen16 goksigen
D 54 g ofaluminium54 galuminiurn
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SULIT 4541n
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 ?
A2
B 2.8
c 2.8.2
D 2.8.8
l4
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 byelements X and Y?Antara berilrut yeng msnkah benar mengenai formula danienis ikatm yang terbenUk <ara
unsurXdanY ?
fl,ihat sebelah
Formulae
Formula
Type ofbondJenis ikatan
A XY,lonic
BXzY
Ionic
c XYCovalent
D XYzCovalent
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SULIT 454ut
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.
t5
32
Iron spoon
Sudu 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 water
Tidsklsut dalamairil Reacs with a weak acid
Bertindak balas dengan asid lemahru The degree of ionisation in water is higlrDarjah pengionan dalam air adalah tinggi
ry Has a low concentralion of hydroxide ions
Mempurzyai kepfutan ion hi&oksidayang rendoh
I and IIII and IIII and tVII and IV
Silver ptrate
Plat argentum
Silver nitrate solution
Ltutqn argentum nitral
pihaf scbelah
ABcD
Diagram 9
Anode
AnodCathode
Katod
A Silver plate becomes thinner
Plat arsentum semakin nioisSilvery deposit fonned
Mendakan berwarna perak terbewuk
B Silvery deposit formedMendakon berw arna perak
terbentuk
Gas bubbles released
Gelembung gas terbebas
C Silver plate becomes thinner
Plat arsentum semakin nipis
Cas bubbles released
Gelembuns sas terbebas
D Gas bubbles released
Gelembuns sas terbebas
Gas bubbles released
Gelembuns. 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 zink
Antara perubahan lersebut yang manakah berlafu dengat penanbahan asid 2 '
Zinc carbonate
Zink karbonat
Zinc oxideZink oksida
A Urea
Urea
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 acid
Asid nitric
C Ammonium nitrate
Ammonium nitat
D Ammonium hydroxide
Ammonium hidroksida
[Lihat sebelah
ST'LIT
ZincZink
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SULIT
35 In an experiment,25 cm3 of 0.2 mol dm-3 hydrogen peroxide solution
decomposes to produce oxygen gas. Graph of volume of oxygen gas against time
is sketched and curve R is obtained as shown in Diagram I I
Dalam satu eksperimen, 25 cm3 0.2 mol dm'3 larutan hidrogm peroluida terurai
menghasilkan gos olcsigen. Graf isipadu gas oksigen melmsan masa dilakarkan danlenglangR terhasil seperti ditunjukkan dalarn Rajah ll
Volume of oxygen gaV cm3
kipadu gas oksigen / cm3
Time/ s
Masal 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-3
20 cm3 0.3 mol dm-3
D l0 cm3 0.3 mol dmjlo cm3 0.3 mol dm-3
hydrogen peroxide
hidragen peroksida
hydrogen peroxide
hidrogen peroksida
hydrogen peroxide
hidrogen peroksida
hydrogen peroxide
hidrogen peroksida
454tit
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SULIT
t7
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SULIT 4541/t
36 Ester is a carbon compound that can be derived from the reaction between alcohol and
carboxylic 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 Ethanol
EtanalEthanoic acid
Asid Etonoik
c Ethanol
EtaraiPropanoic acid
Asid Propanoik
D MethanolMetanal
Propanoic acid
Asid 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.
t8
Zinc plate
PIat zink
Silver plare
Plat argentum
Silver nitrate solution
Lorutan argentum nitralDiagram 13
Which half equations represent rcaction @curs at silver plate?Antara berikut, setengah per.iamctan manakah mewakili tindak balas yong
berlaku di kepingan argentum?
A Zn --) Znzn + 2e
BAg --+ Ag* +e
C Ag*+ e -' Ag
D 2H* + 2e ; Hz
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SULIT
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 carbonate
Natium karbonat
B Ammonium nitrateAmmonium nitrat
Magnesium sulphate
Magnesiumsulfut
Calsium carbonate
Kalsium 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 water
Sabun 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 scums
Kehadiran ion magrcsium dan ion kalsium dalam sabun menghasilkan kekat
l9 454u1
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SULIT
40 Table 2 shows the subatomic particles of P and Q.Jadual2 menu4jukhan zarah-zarah subatom bagi P danQ
Neutron Proton
P 6 5
a 5 5
Table2
It shows that P and QIni menunjuk*an? danQ
I are both positively charged
acblah bercas po,ritifII have the same nusleon number
mempunyai nombor rruHeonyang sama
Iil have the same number of elechonsmempunyai bilangan elektran yang sama
IV are particles of the same elements
adalah unsur yang sama
A I and II onlyB II and III onlyC II and lV only
D III and IV only
4lThe following equation shows the reaction between magnesium and hydrochloric
acid.
Persamaan berikut menunjukkan tindak balas antara magnesium fun asid
hidroHorilc
M&rl + 2HCl tuql ) MgCl2("ol + HzGl
What is the volume of hydrogetr gff, H2 prroduced if 0.05 mol of hydrochloric
acid 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 tekanqt
piawai (STP)?
lMolar volune of gas at STP :22.4 dm3 mol-r]
A 56 cm3
B 60 cm3
C l12cm3D 120 cm3
2A 454u1
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SULIT
42 Gas X is used in airships and weather balloons because of its low density.
Gas X is
Gas X diganakan dala n kapal udara dan belon kajicuaca disebabkan ketumpatannya
yang rendah. Gas Xadalah
A Helium
B Neon
C 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
454ut
2l 4S4lll
sebelah
^A. 4A
832c24D16
Pairs of metal
Pasangan logom
Potential difference / VBeza keupoyaan/Y
Negative terminalTerminol negatif
Q and Copper
Qdan Kuprum t.7a a
R and Copper
Rdan Kuprum 0.53 Cu
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SULIT 22 4$4t/t
45 The equation shows the reaction between sulphuric acid and potassium hydroxide.
Persanaan di bawah menunjuft:lcon tindafi:balas antara asid sulfurik dan kalium
hidroksida.
HISO* +2KOH
-'* trGSOr + 2I12O
What is the volume of 0.1 mol dmi potassium hydroxide solution which can
neutralise 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
D80.0 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 is
Personaan ion untuk tindak balas ini adalah
A Pb 2* + l- --+ PbI:B Pb2* + 2l' -' Pblz
C K* +NOr'---'KNO:D 2K
* + No3- --* 2KNor
47 A compound FeXs is formed from the reaction between 0.1 mol of iron and
10.65 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 g
unsur XApakahjisim atom relatf bagi unsurX?
frJisim atom relatif : Fe = 56J
A 35.5
B 35.0
c 32.5
D 32.A
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SULIT 4541n
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 kettka
Antra 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
[Lihat sebelah
23
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SULIT
50 Diagram 15 shows the apparatus set-up to investigate a redox reaction.
Rajah 15 menunjukkot su;uwu radas untukmengkaji satu tindakbalas redoks.
gradute elactrode
elck*td karbon
X soLd:n
Iarlatart]{
24 434ut
Dilute su$hric acid
Asrd su{ur* catr
[Lihat sebelrh
U- tube
nub U
Diagram 15
The colourless potassium iodide solution becomes a brown
Which 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 chloride
Natrium Horida
QUESTTONS END FIERE
solution.
B
C
D
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PROGRAM PENINGKATAN PRESTASI AKADEMIK SPM
TAHUN 2012
PERATURAN PEMARKAHAN
CHEMISTRY
PAPER MARKS
Paper 1 50
Paper 2 100
Paper 3 50
Total 200
Jumlah markah diskalakan kepada 100%
CHEMISTRY
Paper 1
1 B 26 C
2 C 27 B
3 D 28 A
4 A 29 C
5 B 30 D
6 B 31 A7 B 32 D
8 A 33 D
9 D 34 B
10 C 35 D
11 D 36 D
12 D 37 C
13 C 38 C
14 D 39 B
15 A 40 D
16 D 41 A
17 D 42 A18 C 43 A
19 B 44 C
20 C 45 C
21 A 46 B
22 B 47 A
23 A 48 B
24 B 49 C
25 B 50 A
A = 12 ; B = 13 ; C = 12 ; D = 13
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4S4ln 2 SULIT
{Lihat sebelah
INFORJ}'ATION FOR CA}I DI DATES
MAKLUMAT 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 spaces
provided 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 dengon
terperinci. 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?ren
write 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 and
Section 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
4S4ln
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4S4tn SULIT
Section A16A marksl
Answer all'questions in tlris section
Jowob sernufr soalan dalam hahagian ini.
Figure I show the electron arrangetnent of three atoms of elernents P, Q and R
Rajah 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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454tn STILIT
(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.
[2mwksl
(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-
ll narkl
ll,ihtt s*helah
4
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454tn
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 tube
Tabung 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 tiub
pembakoran 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.
fi nmkl
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4$4tn 6
(d) Table 2 shows the result obtained in tfte experiment:
Jadaat 2 menunjrkkan keputusan yang diperolehi dalam eksperimen di atos :
SULIT
Mass of combustion tube + asbestos paperJisim tiub pembakaran * kertas asbestos
58.36 g
Mass of combustion tube + asbestcs paper + coppe(ll) oxide
Jisim tiab nembalcaren + kertas asbestos+ fuprw(ll\ olsida91.95 g
Mass of cornbustion tub€ + asbestos paper + copper
Jisim tiub oembakaran + kertas asbestos* kuprwn85.2a 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?
{l nnrkl
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4gln
3
Reaction RTinda*balasR
SULIT
Ammonium sulPhate
Ammonium 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*tRajah3.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?
U nork]
(c) (i) Write a balanced chemical equation for reaction R
Tulis persamaan Hmia yang seimbang bagi tindak balas R
12 mnrksl
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4gtn
(i i)
SULIT
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 issue
of environmental pol lution.Penggunaan poliwer sintetik secara berlebihan didalom kehidupan seharian telah
menjadi isu kepada pencemaran alam sekitar.
Give one method to overcome this problem.
Berikan salu kaedah untuk mengatasi masalah ini
I lmark 1
[Lihat sebelahgtiLrT
(d)
I
H
{e)
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4
SULIT
Diagram 4.I and 4.2 shows a set up apparatus to investigate the role of water for acid to
show its acidic properties.
Rojah 4.1 ond 4.2 menunjukkan radas wuk menglaji peranan air untuk asid menuniukJan sdat
keasidannya.
Dry hydrogen chloride gas
Gas hidrogen Horida kcrW
Methylbenzene
Metilbewena
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 kertas
Iitmus b iru. Nyatakan pemerhatian.
ll norkl
(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 5
minit . Larutan itu dibahagikan lepada dua bahagian, Bahogianl dan Bahoglaull.Jadual 4 mentnjulckan pemerhatian bagi dua ujian yang dijalankan ke atas duo
bahagian ita.
PartBahagian
TestUjian
ObseivationPemcrhorian
I Add magnesium carbonate.
Testgas given off with lime waterTambahkon m agn es i*n karbonat.Uji gas yang terbebas dengon air kapw
Effervescence
Pembuakan
Lime water turns chalkyAir kapur menjadi luruh
II Add magnesium ribbon.Test gas given offby pufting inlighted wooden spl interTambahkan pit a magn es i wn.
Uji gas terhasil dengan memasukkan
Irayuuji 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
ll markl
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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
HHH
tllH-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 + 4H2O
2
Calculate the volurne ofcarbon dioxide gas produced if 0.1 mol of propan-l-ol is bumt
completely in air.Ilinmgkan isipadu gas karbon dioksida yang terhasil jika A.l mol propan-l-al dibakar dengan
Iengkap dalam udara.
[Molar volume :24 dm3 mol-l at room condition]
12marksl
[Lihet scbelsh
SULIT
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?
SULIT
ll nmkJ
(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?
$ markName compound Y.Namakan sebatian Y.
twarrn
(ii)
hopan-l-ol soakedwith glass wool
l1 markl
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4$fin 13
(e) Compound Zhas the following properties:
.SebatUn Z mempnyai stfat-stfat beri*at :
STJLIT
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?
ll markl
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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 kadar
tindakbalas *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 sight
Masa 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 disappear
from 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 grafpada (d), nyatakm hubwgan qntara $rtu dan masa.
lt mrkl
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Section B
[20 rzr:kslAnswer any one question.
Javtab m(rnt -rnsna sala soolan.
S{'LIT
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 proton
t7 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 formionic 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)
12markl
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(c) Diagrarn 7 shows the molecule of carbon dioxide. The bond formed between carbon atom
and oxygen atom are double covalent bond.
Rajah 7 menunjuk*an molekul karbon dlokida. Ikatanyang terbentuk antara atom
Iurbon dan atom olsigen ialah ilcatan kovalen ganda dua.
18
Dagram 7
Explain the formation of this compouod in terms of :
o Electron arrangement
r 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 solvent
o 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 organic
o Contoh sebatian
$0 marksl
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Carbon electrode XElel*rod karbonX
19
concentrated coppe(I I)chloride solutionIarut an hprum{ll). kl or da
Wlcat
Carbon elrctrode YEtefuod korbonY
SI,'LIT
[Lihat mbelah
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'
tme 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 your
explanation:
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 elekrd
r The reason why the ions are selectively dischargedSebab ion-ion ini dipilih unuk dinyahcas
. Half equations for each reaction
Setengah persomaan bagi setiap tindak balas
o The observable changes ofthe solution
Perubahan 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 metals
Pasangan laganPositive terminal
Terminal positifPotential difference/ V
Beza keupayaan
W' Copper Copper 3.1
X,Y Y 0.3
wx X t.8X, Copper
Table 8
(i) Based on the values ofthe potential differences, arrange the metals in descending
order 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 of
metals X and Cu.
Explain your answer.
Ramulkan terminal positif dan nilai heza bagf pasangan logom X dan C*Jeloskan jawapan anda.
t3 markd
[Lihat sebelab
20
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Cu
Copper${) nitrate
Kaprum(ll) nitrut
SULIT
[Lih*t sebelah
(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 R
LarutqnR
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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{s4U2 SULIT
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 with
copper (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 bagi
logamQ.
[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
22
Experiment Reactants
Bahan Tlndalcbalas
Heat of Displecement
I{*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
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S{JLIT
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10 (a)
SI]LTT
Diagram l0 shows an apparatus set-up, its observation and chemical equation to
investigate the displacement of halogen from its halide solution by halogen P.Rajah ft menunjukkan susunan radas , pemerhatian dan prsamaan kimia'untuk mengkaii
penyesaran hologen daripada larutsn halidanya oleh halogenP .
Diagnm 10
(i) Suggest the identity of halogen P
Cadangkan 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 telah
berlalru.
[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 tindak
balas ini.
13 marksT
plhet sebelah
SULIT
24
potassium A , P
iodide solution U ,/larutan \ ,{, shake
kaliumiodida \ I I gonccrrg\H-_w
l, l, I -trichloroethane
l,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 N
on the rusting of iron when coiled on iron nail.
Jodual l0 .l fienunjukkan keputusan dua eksperimen untuk mengkaji kesan logam M dan N
ke atas pengaratan besi apabila dililitkan pada paku besi.
ExperimentEksnerimen
0bservationPemerhatian
Experiment IEloperimenl
Hot agar solution +potassium hexacyanoferrate (l l$solution + phenolphthalein
larutan agar-cgar panas *kalium heksasianoferat {lllt. +
fenolftaleinmetal MlogamM
Blue spots formed in the
agar
Tompok biru terbentuk
dolam agar-sgar
Experiment IIEksperimen ll
Hot agar solution +
potassium hexacyanofurrate (l II)solution + phenolphthalein
larutan agar-agar panas +kaliam helasasianoferat (lfl) +
fenalftaleinmetal NlopamN
Pink spots formed in the
agar
Tompak merch jambu
terbentuk 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 the
electropositivity of the metals.Susunkan secara menaik bagi togam M,N dan besi berdosarkan sifatke e I e laropo si tifan Iogam .
I markl
(c) A student carried out an experiment to construct a Reactivity Series based on the
reactivity 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.rh
25
4S4ln
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454tn SULIT
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 dengan
olrsigen 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 dengan
oksigen.
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 kereaktifan
mana-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 logam
terse but terhadap oksigen.
Terangkan bagaimana anda membina Siri Kereahtifan tersebut.
{4 narksl
Ilihat seb€lah
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 residue
Log.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*+*SYmbol
I X**-Name of element
\Relative atomic mass
t
HeHelium
{3
LiLithftm
1
{
BeScrytliunt
9
5
BBorfi
t1
6
cCarban
l2
1
NNitroger
l4
I
o0lryS.rt
t6
Ir
Flucinel9
l0
NeNs
?0
ll
NaSodium
23
It
Mgt{agnerium
24
t3
AIAlurni*irm71
l4
siSilicrlrt2t
It
PPllorphtr
Itt3t
l6
sSulphur32
17
CIChlorit*19
l8
ArArgs40
l9
KForascium
39
20
CaCalcfuE
40
2l
SeScadium
45
+t
TiTironium
48
23
vVaaadiu
$JI
24
CrChronium
52
25
MnMrnpnx
c
5t
26
FeIron
56
27
CoCobolt
59
?8
NiNicktl
59
29
CnCopn6
64
30
ZnZirr65
3l
GnCallium
?0
'JGe
Carmanium71
33
AsAr$nic
75
14
SeSchnium
79
35
BrBromine
80
36
KrKryg
84
37
RbRutridiun
E6
38
Sr$rontium
tt
39
YYtlriufi
89
,lO
ZrZircolium
9t
dl
NbNiSium
9]
42
MoMolybdcn
uo96
43
Tc't*hoeliu
m18
44
RuRutheniu
m
t0l
45
R}Rhodium
103
rl6
PdPalladiurn
106
47
AgSihtr
103
4E
cdCadr,rium
il2
t9
Inlndirm
il5
50
Snlltil9
5t
SbAatiuony
t22
TeTellutlunr
l2t
5l
Ilnlim
121
5{
XeXmo
t3t
JJ
CsCaesiun
r33
56
BaBerium
137
51
LaLaathanu
m
r39
al
TIfllaftrium
t79
1t
TaTanlalun
l8t
11
wTung5len
184
15
ReRheniun
186
76
0sOmium
r90
77
Irlridiun
192
?E
PtPlailusr
195
79
AttQold197
EO
HgMdisury
?01
8l
TITtalliut
3(X
82
PbLd207
83
BiBismulh
249
8rl
Pofulonium
2t0
g5
AtAststinc
210
86
RnRad
JJ
87
Fr
Fnncium723
t8
Ra
Radium2:16
t9
Ac
&tinitrm221
104
unqUnnil-
quadium
251
t0J
unpUnnil-
pct{inlr260
IUO
Unh
Unnil-hcr
um161
107
Uns
Umilsc.pi
un262
108
Uno
Unnilo$i
um265
109
Uue
Unnil6nni
um7n6
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1
SULIT: Chemistry 2 4541/2 (PP)
Question No Mark Scheme Sub
Mark
Total
Mark
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
Question No Mark Scheme Sub
Mark
Total
Mark
2 (a) Chemical formula that shows the simplest whole number ratio 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 g
Mass 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
1. Correct reactants and products
2. Balanced equation
1
1 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
Question No Mark Scheme Sub
Mark
Total
Mark
3 (a) (i) Contact process
1 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
1
1 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
Question No Mark Scheme Sub
Mark
Total
Mark
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+ + CO3
2-à CO2 + H2O
1. Correct reactants and products 2. Balanced equation 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
Question No Mark Scheme Sub
Mark
Total
Mark
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 dm
3//
7200 cm3
1
1 2
(c) (i) Compound that contain carbon and hydrogen only 1 1
(ii)
water
1. 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
Question
No Mark Scheme
Sub
Mark
Total
Mark
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 correctly
4. Correct shape and smooth curve
1
11
1 4
(e) The higher the temperature, the less the time taken for Xmark to disappear from sight // the temperature is inversely
proportional to time 1 1
Total 10
X
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7
Question No Mark Scheme Sub
Mark
Total
Mark
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 : 2.6
3. 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
11
11
11 Max. 5
(d)Ionic compound Physical properties Covalent compound
Solid Physical state at
room conditions
solid, liquid,
gaseous
High Melting/ boiling pt Low
Conductselectricity in
molten / aqueous
Electricalconductivity
Does not conductelectricity in all
state.
Soluble in water//Insouble in
organic solvent
Solubility in water and organic solvent
Insoluble in water//Soluble in organic
solvent
Sodium chloride// other ionic
compound
Example of compound
Tetrachloromethane// other organic
compound
1+1
1+1
1+ 1
1+1
1+1 10
Total 20
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8
Question No Mark Scheme Sub
Mark
Total
Mark
8 (a) (i) Electrode Y : the position of ions in electrochemical series
Electrode X : concentration of ions / solution/electrolyte
1
1 2
(b)Electrode Y X
Ions that areattracted
Cu2+ , H+ Cl- , OH-
Ions that areselectively
dischargedCopper(II) ion Chloride ion
Reason
Cu2+
is lower than
H+ in theelectrochemical
series
Concentration of
Cl- higher
Half equations
Cu2+ + 2e Cu 2Cl- Cl2 + 2e
Observablechanges of
the 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. Cu
2. 1.3 V3. Metal X is more electropositive than metal Cu
1
11
3
(ii) 1. Positif terminal : Q2. Negative terminal : Cu
3. Suitable metal for Q : silver
4. Suitable solution for R : silver nitrate solution
[ a: name of substance ]
11
1
1 4
Total 10
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9
Question No Mark Scheme Sub
Mark
Total
Mark
9 (a) (i) 1. P : Mg // Magnesium
2. Q: Zn // Zinc
1
1 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/ further 3. 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
= 16oC
1
1
1
1 4
(c) 1. Appratus: Polystyrene cup , thermometer, [spatula] measuring cylinder ( suitable volume)
2. Procedure: 1. Measure 50cm
3 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
1
11
11
1
1
1
1
1+ 1
Max 10
Total 20
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10
(i) P = chlorine // bromineAccept : formula
1
(ii) Oxidation = 2I
- →
I2 + 2eor
Reduction = 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 dropper
2. starch solution to the product in a test tube
3. dark blue colouration/solution is formed
r: precipitate
1
1
1
6
(i) Exp 1
1.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 rust
Exp 24. No iron (II) ion // presence of hydroxide ion
5. Metal N is more electropositive than iron //metal N located above iron in Electrochemical Series
6.When metal N in contact with iron nail, iron do not rust
1
11
1
1
1Max 5
(b)
(ii) M,iron,N 1 1
(c) (i) 4Fe + 3O2 → 2 Fe2O3
1. formula of reactant and product correct
2. Balanced equation
1
1 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 above
iron and T in the Reactivity Series
3.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 U
and iron in the Reactivity Series.
1
1
1
1 4
20
END OF MARKING SCHEME
Solid potassium
manganate(VII)
MetalGlass wool
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SULIT
INTORMATION FOR CANDIDTTES
l. This question paper consists of three questions. Answer allquestions.
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 thatyou 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 Descrintion
3
2
t0
Excellent : The best resPonse
Satisfactory : An average response
Weak : An inaccrnate response
No response or wrong r€sponse
454t/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 ucid
hklxtWorik HCt 1.0 mol dm'3
Stirred___--____4dikacau
4s4113
OC
OC
OC
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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 cm3
of 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
l
asid et6noik2.0 mol dm-3
f}Ilililil|fl
W#f, W\ Polystyrene cups /
Cawan polistirena
Inifial temperature of the rnixture : Tr oC
Suhu cwal campuran
Highest temperature of the mixture: TzuC
Subu te r t inggi camFar 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
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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 in
Experiment 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 Ie lubuh beryerakbalus
(iii) ConstantVariableP e mbo Ie la$ ah d i tzna,la rkm
[ 3 marks]
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45411-\SULIT
fri) Diagram 1.2 shows the calculation to determinc tlre heat of neutralisation for th
reactions in Experiments I and IIn ; n 1.2 menmju*kan perhitungan untah menentukm haba peneatralan bogi tiwla
balos daiam Ekperimenl dan Eksperimenll
Experiment I
Heat released
I{aba yang dihebaskan: mcO
=50Bx4.2Jgr x*xJ
Heat $f neutralisation
Haba penedralan: xkJnumber ol'mole of water Produced
bilangan mol air.vang dihs$ilksn
Experiment II
Heat released
Haba yang dibebaskan: mc0
= 50 8 x4.21
=yJXT3oC
Heat of neutralisation
tr{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
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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 untak
nengkqji keterlarulan gararn dalam air.
Experiment ReactionTindaL balas
Observations
Penerhstian
I
Add water
Tambah sir
Calcium nitrate Colourless solutionKqlsium nitrat Larwan tak berwama
IIAdd water
Tsmbahair
-|}Copper(Il) sulphate Blue solufionKr,prrndll) sulfat Larutat biru
NI
Calcium carbonate
Kalsium ka*anat
Table I
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SULIT I 454t/3
(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
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SULIT
3
454v3
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 tan kup r wn(ll)s u Ifut
Diagranr 3
Based 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, rancangsata 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 variables
Semua pemboleh ubah
HypothesisHipotesis
List of materials and apparatus
Senaai balmn danradas
Procedtrre
Prosedur
Tabulation of data
Peqiadualan data [17 marks]
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
No response or wrong response 0
1(c ) Able to state the hypothesis accurately
Sample answer
The heat of neutralization of a weak acid and strong alkali is smaller than
the 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 strong
alkali
2
Able to state the idea of hypothesis
Sample answer
The heat of neutralization changes
1
No response or wrong response 0
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
No response or wrong response 0
1(f) Able to state the formula accurately
Sample answer
Change in temperature= Highest temperature of mixture- initial temperature
of 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
No response or wrong response 0
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 and
alkali // 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
No response or wrong response 0
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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
No response or wrong response 0
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Question Mark Scheme Marks
Able to state all observation correctly
Sample answer
EXPERIMENT Observation
EXPT I
Calcium nitrate dissolves //Colourless solution is formed.
EXPT II
Copper(II) sulphate dissolves//Blue solution is formed
EXPT III .
Calcium carbonate does not dissolve/remainsunchanged // No change. 3
Able to state any 2 observations correctly. 2
Able to state any 1 observation correctly. 1
2 (a)
No response or wrong response 0
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
No response or wrong response 0
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)
No response or wrong response 0
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QuestionMark
Score
Able to state the problem statement correctly
Sample answer:
How does the distance between two metals in the electrochemical
series affect the voltage produced?
2
Able to state the problem statement less correctly1
3(a)
No response or wrong response0
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 // Copper
electrode//Concentration of electrolyte
3
Able to state any two variables correctly 2
Able to state any one variable correctly 1
3(b)
No response or wrong response 0
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Question Rubric Score
Able to state the hypothesis correctly and with direction
Sample answer:Hypothesis: The further the distance of the pairs of metals in the
electrochemical 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 hypothesis
1
3(c)
No response or wrong response0
Question RubricScore
Able to give complete list of substances and apparatus
Sample answer:
Substances
Copper (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)
No response or wrong response 0
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Question Rubric Score
Able to list all the steps correctly
Sample answer:1. Clean the strips of magnesium and copper with sandpaper.
2. Measure 50 – 100 cm
3
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 5
2
Able to list down steps 3 and 4
1
3(e)
No response or wrong response0
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Question Marks Scheme Marks
2(f) Able to exhibit the tabulation of data that includes the following four
information.
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 three
information.
1. Heading for the manipulated variables2.. Heading for responding variable3. One Manipulated variableSample answer:
Pairs of metals Voltmeter reading // Voltage
(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 variables
2.. Heading for responding variable
Sample answer:
Pairs of metals Voltmeter reading // Voltage
(V)
1
END OF MARKING SCHEME