2012 chemistry pahang with answer

8/12/2019 2012 Chemistry Pahang With Answer

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CHEMISTRY

Kertas 1

OKT NOV 20121 }{JAM

PEPERIKSAAN PERCUBAAN SPM TAHUN 2 12

CHEMISTRY

Tingkatan 5

Kertas 1

Satu jam Lima el as in t.

JANGAN BUKA KERTAS SOALAN SEHINGGA DIBERITAHU

INFORMATION FOR CANDIDATESM KW M T UNTUK CALON

1. This question paper consisits of 5 questions .Kertas soalan ini mengandungi 5 soalan

2. Answer all questionsJawab semua soalan.

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3. Each question is followed by four alternative answers A B C or D For each question choose one

Answer only . Blaken your answer on the objective answer sheet provided . Tiap-tiap sao/an diikuti o/eh em p t pilihan jawapan i itu A B C dan D Bagi setiap soalan pilih

atu j w p n sahaja. Hitamkan j w p n and a p d a kertas j w p n objektif yang disediakan.4 If you wish to change your answer erase the blackened mark that you have made . Then blacken

Kertas soa/an ini mengandungi 28 halaman bercetak

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1. Which of the following statement is true regarding chemical?Yang manakah di antara berikut adalah benar merujuk kepada bahan kimia?

A. Each matte r is a chemical.Setiap jirim adalah bahan kimia .

B. Air is not considered a chemical.Udara tidak dianggap bahan kimia .

C. Chemical are only found in laboratories.Bahan kimia hanya dijumpai di dalam makmal.

D. All chemicals are dangerous substances .Semua bahan kimia adalah berbahaya.

2 . Diagram 1 shows the electron arrangement of an atom of element P .Rajah 1 menunjukkan susunan elektron bagi atom unsur P .

iagram 1Rajah 1

What is the number of valence electrons in atom P ?Berapakah bilangan elektron valen bagi atom P

A 78 6c 50 4

3 . The following statements are about atom M and Z . ~ o t a a nberikut adalah mengenai atom M dan Z.

1 ~ . . : . - . : . n ~ :~ . : : .

: ~ - - ~ : ~ Electron arrangement of atom M is 1r ;~ t ~ ~ - ~~ Susunan elektron atom M ialah 1\f c ~ Proton number of atom Z is 6~ ., ) /-j Nombor proton atom Z ialah 6

~ ~ ~ ~.f t / 1. .i f~ _~ o~ ~ ih eformula of the compound formed between M and Z?

~A p a ~ a hformula bagi sebatian yang terbentuk a ntara M dan Z

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4. Table 1 shows the proton number of elements P Q RandS .Jadual 1 menunjukkan nombor proton bagi unsur P Q R dan S.

Element pUnsur

Proton number11

Nombor proton

Q

14

Table 1Jadua 1

R

16

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s

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What is the arrangement of elements S T U and V in ascending order of atomic size?Apakah susunan saiz atom secara menaik bagi unsur unsur S T U dan V

A P Q R SP S Q R

C S R Q PD R Q P S

5. Table 2 shows the melting and boiling points of substances W X Y and ZJadua/ 2 menunjukkan takat /ebur dan takat didih untuk bahan W X Y dan Z

Substanceahan

wXyz

Melting point I Takat lebur I C

-5948

-110128

Table 2Jadua 2

Boiling point I CTakat didih I C

60130-70470

Which of the following substances has the highest kinetic energy at room temperature?



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Persamaan di atas menunjukkan penguraian garam karbonat bagi logam X apabila

dikenakan tindakan haba. Jika 0 05 mol xo terhasil, hitungkan jisim bagi xco yangterurai .

JAR : C 12; 0 16; X,64).

A 0 08 g

B 1 60 g

c 3 20 9D 6 20 g

10 Aluminium oxide has both acidic and basic properties therefore it is

Aluminium oksida mempunyai kedua-dua sifat asid dam bes oleh itu aluminium oksida

ialah

A. a base oxideoksida bes

B an acid oxideoksida asid

C a metalloid oxideoksida metaloid

D. an amphoter ic oxideoksida amfoterik

11 he diagram 2 shows the electron arrangement of a compound formed between atoms Pand Q

Gambar rajah 2 menunjukkan susunan electron bagi sebatian yang terbentuk antara atom

.P de ngan atom Q

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Diagram 2Rajah

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Which of the following statements is tru about the compound?Antara pemyataan berikut yang manakah benar ten tang sebatian itu

A. It is an ionic compound

Sebatian itu adalah sebatian ionB. The compound is formed by covalent bonds

Sebatian itu terbentuk melalui ikatan kovalen

C. The compound has a high boiling pointSebatian itu mempunyai takat didih yang tinggi

D. The compound is formed by electron transferSebatian itu terbentuk melalui pemindahan elektron

12. A restaurant owner wants to use colourful electric lamps to attract customers.

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Which of the following substances A B C or D in the Periodic Table is suitable to be used

in the lamps?

Seorang pemilik restoran ingin menggunakan fampu efektrik yang berwama warni untuk

menarik perhatian pelanggan.

Antara unsur A 8 C dan D dalam Jaduaf Berka/a berikut yang manakah sesuai

digunakan untuk lampu itu.

A D

B c

The diagram 3 shows the electron shells in the substance formed between atoms of

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Diagram 3Rajah

What is the electron arrangement of atom Y?Apakah susunan elektron bag i atom Y

A 2.4

B 2 .8

C 2 .8.4

D 2.8.8

14 . In Periodic Table each elements in the group have

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Dalam Jadual Berka a unsur-unsur dalam satu kumpulan tertentu mempunyai

simi lar physical characteristicsifat fizik yang sama .

II similar chemical characteristic

sifat kimia yang sama.

Ill equal number of proton in the nucleus of an atombilangan proton yang sama dalam nukleus atomnya.

IV equal number of electron in the outermost shell of an atombi/angan e/ektron yang sama di petala /uar atomnya .



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15 Diagram 4 shows information of element X and element YRajah 4 menunjukkan maklumat bagi unsur X dan unsur Y .

Diagram 4Rajah

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Which of the following electron arrangement for the substances formed when the element

X and element Y react?

Antara berikut yang manakah susunan elektron bagi sebatian yang terbentuk apabila

unsur X dan unsur Y bertindak balas?

A

[ J ~ lB

C



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16 . Which of the following are true about ionic compound?Antara pernyataan berikut. yang manakah benar tentang sebatian ion?

Dissolve in water

Larut dalam air

II Produced from the reaction between metal and non metal elementsTerbentuk daripada tindak balas antara unsur logam dengan unsur bukan /ogam

Ill Formed through transfer of electrons between the atomTerbentuk melalui perpindahan e/ektron antara atom-atom.

IV Conduct an electricity in a solid stateMengalirkan arus elektrik dalam keadaan pepejal

A I and II onlyI dan II sahaja

B Ill and IV onlyIll dan IV sahaja

C I II and Ill onlyI, II dan Ill sahaja

D I II Ill, and IVI II Il l, dan V

17 . Which substances are electrolytes?Bahan-bahan manakah adalah elektrolit?

GlucoseG/ukosa

II AcetamideAsetamida

Ill Lead ll) bromidePlumbum //) bromide


C. I and IllI dan Ill

D. Ill and IVIll dan IV

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A I and II onlyI dan II sahaja

B II and IV onlyII dan IV sahaja

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C. I and Ill onlyI dan I ll sahaja

D. II Ill dan V sahaja1/ Ill dan IV sahaja

20 . Amni are going to coat an iron key with silver by electrolysis. The anode should

Amni akan menyadur kunci besi dengan perak melalui elektrolisis . nod adalah

A Silver plate C. Iron platePlat perak Plat besi

B. Silver nitrate D. Iron keyArgentum nitrat Kunci besi

21 . Which of the following statements is true about all bases?Manakah antara pernyataan berikut benar tentang semua bes?

A React with acidsBertindak balas dengan asid

B. Dissolves in waterLarut dalam air

C. Contain hydroxide ionsMengandungi ion ion hidroksida

D. Have alkalines propertiesMempunyai sifat alkali

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22. Diagram 6 shows the set up of apparatus used to investigate the ability of various

solutions to conduct electricity.

Rajah 6 menunjukkan susunan radas yang digunakan untuk mengkaji kebolehan

pelbagai larutan untuk mengalirkan arus elektrik.

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: .

Diagram 6Rajah

BulbMento/

Solution XLarutan X

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The light bulb glowed brightly . The aqueous solution X could beMento/ menyala dengan terang Larutan akues X adalah

A. ethanoic acid C citric acidasid etanoik asid sitrik

B. hydrochloric acid D. tartaric acidasid hidroklorik asid tartarik

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23 . The equation shows the reaction between sulphuric acid and potassium hydroxide .

Persamaan i bawah menunjukkan tindak balas di antara asid sulfurik dan kalium

hidroksida

What is the volume of 0 .2 mol dm3

potassium hydroxide solution which can neutralize

20 .0 cm3

of 0 .1 mol dm3

sulphuric acid?

Berapakah isipadu /arutan kalium hidroksida 0 2 mol dm yang diperlukan untuk

meneutralkan 20. 0 cm 0. 1 mol dm asid sulfurik?

A. 10 .0 cm3 C. 40.0 cm 3

B. 20 .0 cm3

D 80.0 cm3

. The equation shows the reaction between sod ium chloride solution and silver nitrate

solution to produce silver chloride precipita te .

Persamaan menunjukkan tindak balas antara larutan natrium klorida dan larutan

argentum nitrat untuk menghasilkan mendakan argentum klorida

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20 cm o 1 0 mol dm

larutan natrium k/orida bertindak bat as lengkap dengan larutan

argentum nitrat berlebihan Hitungkan jisim mendakan yang terbentuk

[Jisim atom relatif Ag=108; C/=35 5]

A 3.78 g

3.87 g

25 . Which of the following salts is insoluble?Antara berikut yang manakah garam tak terlarut?

A Barium sulphateBarium su/fat

B Potassium carbonateKalium karbonat

c Silver nitrateArgentum nitrat

D Ammonium carbonateAmmonium karbonat

cD

2.78 g

2.86 g

26 . Diagram 7 shows the set-up of apparatus to prepare a sulphate sal t using the

precipitation reaction.

Rajah 7 menunjukkan susunan radas dalam penyediaan garam sulfat denganmenggunakan tindak balas pemendakan

Solution ~Larutan X .-

. I


StirKacau

Diagram 7Rajah

PrecipitateMendakan

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Solution X isLarutan X adalah

hydrochloric acid Ill lead ll) nitrateasid hidroklorik plumbum nitrat

II barium chlo ride IV calcium chloridebarium klorida kalsium klorida

A I and IV only c II, Ill and IV onlyI dan V sahaja II, Ill dan V sahaja

I II and I ll only D I II, Ill and IVI II dan Il l sahaja I II Ill dan V

27 . The following information shows the properties of salt X.Maklumat berikut menunjukkan sifat-sifat garam X

Releases brown gas and a gas which lights up glowing splinter

when heated strongly .

Membebaskan gas perang dan gas yang menyalakan kayu uji

berbara apabila dipanaskan dengan kuat.

Residue after heating is brown when it is hot and yellow when it iscold .

Menghasilkan baki yang berwarna perang semasa panas dan

kuning semasf3 sejuk

C . Lead ll) nitratePlumbum //) nitrat

D. Lead ll) carbonatePlumbum //) karbonat

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28 Diagram 8 shows tests performed on compound G .Rajah 8 menunjukkan ujian yang dijalankan ke atas sebatian G.

l G IAdded with dilute hydrochloric acid andfiltered

kd nambah dengan asid hidrokloridituraskan

Precipitation SolutionMendakan Larutan

Added w th ammonia solutionessntil exc

Tambah larutan ammoniaanerlebih

White precipitatedissolve

Mendakan putih

Diagram 8Rajah

a rut

G is a mixture of two types of salts. Which of the following is found in G?G ialah campuran dua jenis garam . Antara berikut manakah terdapat dalam G?

A Silver sulphate and copper ll) carbonateArgentum sulfat dan kuprum /1) karbonat

B Lead ll) nitrate and zinc carbonatePlumbum //) nitrat dan zink karbonat

C Lead ll) nitrate and aluminium nitratePlumbum //) nitrat dan aluminium nitrat

g n e s i u msulphate and lead ll) carbonate~ J t } a gn e s i u msulfat dan plumbum //) karbonat1 _

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29 What is the type of glass used to make glass containers?Apakah jenis kaca yang digunakan untuk menghasilkan bekas kaca?

A Borosilicate glassKaca borosilikat

B Soda lime glassKaca soda kapur

C Fused glassKaca silica terfakur

D Lead crystal glassKaca plumbum

30 Statues or monuments are made of bronze What is the main metal in bronze?Patung atau tugu dibuat daripada gangsa Apakah logam utama dalam gangsa?

A IronBesi

B AluminiumAluminium

C MagnesiumMagnesium

D CopperKuprum

31 The following equation represents the reaction between calcium carbonate and

hydrochloric acid

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P n berikut mewakili tindak balas antara kasium karbonat dan asid hidroklorik



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A Decrease the size of calcium carbonateMengurangkan saiz kalsium karbonat

8 Increase the temperature of the mixtureMeningkatkan suhu campuran

C Increase the volume of hydrochloric acidMeningkatkan isipadu asid hidroklorik

D Increase the concentration of hydrochloric acidMeningkatkan kepekatan asid hidroklorik

3 . Which of the following is a role of catalyst to increase the rate of reaction?

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Antara berikut yang manakah adalah peranan yang dimainkan oleh mangkin dalam

meningkatkan kadar tindak balas?

A It increase the kinetic energy of reacting particleIa boleh meningkatkan tenaga kinetik zarah bahan tindak balas

8 It lowers the activation energy in the reactionIa merendahkan tenaga pengaktifan di dalam tindak balas

C It decrease the number of collision per second in the reactionIa mengurangkan jumlah perlanggaran per saat di dalam tindak balas

D It increase the surface area of the reacting particleIa merendahkan luas permukaan zarah bahan tindak balas

33 . Diagram 9 shows the apparatus for an experiment to determine the rate of reaction

between sodium thiosulphate solution and sulphuric acid.

Rajah 9 menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindak

balas antara larutan natrium tiosulfat dan asid sulfurik.

~

{ mark,, Tanda

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Diagram 9Rajah

Sodium thiosulphatesolution sulphuric acidNatrium tiosulfat asid

sulfurik

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Which o the following combination o conditions will make the mark X to disappear the

fastest?

Antara kombinasi keadaan berikut yang manakah mengambil masa yang paling singkatuntuk tanda X hilang daripada penglihatan?

ABcD

Sulphuric acidAsid sulfurikVolumelsipadulcm

10101010

ConcentrationKepekatanlmoldm

1.01.01.01.0

Sodium thiosulphate solutionLarutan natrium tiosulfatVolume Concentrationlsipadu m

Kepekatanlmo dm

50 0.550 0.550 1.050 1.0

34 Diagram 10 shows an energy level for the reaction X + Y 7 Z

Rajah 10 menunjukkan aras tenaga untuk tindak balas X + Y 7 Z

EnergyTenaga

Diagram 10Rajah 10

c

D

130 kjmol 1

830 kjmol1

TemperatureSuhu I C

30405030

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35 Table 3 shows the total volume of gas collected at regular interval in a reaction.

Jadual 3 menunjukkan jumlah isipadu gas terkumpul pada seta masa tertentu .

Time,s0 30Masa,s

Volume of gas,cm 3 0 2 0lsipadu gas cm 3

What is the average rate of reaction?

Berapakah kadar tindak balas purata?

A

B

60 90

3.7 5 2

Table 3Jadua 3

c

D

120 150 180

6 4 7 .3 8 6

36 Which of the following pairs of compounds are in the same homologous series?

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210

8 6

Manakah antara pasangan sebatian berikut berada dalam siri homolog yang sama?

Compound 1 Compound 2

Sebatian 1 Sebatian 2

A c2H4

c3 H sB C2 Hs c3 H s

c C2 Hs OH CH3C 2HD C2HsOH C2 Hs COOH

37. The following equation represents a reaction for industrial preparation of Propanol.

n berikut mewakili tindak balas penyediaan etanol secara industri. .: . )~ ~ \ .

~ ~ .

P H2 CH3 CH2 CH2 OHCatalyst X 30CfC/60atm

[ mangkin X 30CfC I 60 atm]



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What is P and catalyst X?Apakah P dan mangkin X?

A

B

c

D

p

C2H4

C3Hs

C2H4

C3Hs

2

Catalyst XMangk nX

Platinumplatinum

Nickelnikel

Nickelnikel

Phosphoric acidAsid fosforik

38 Diagram 11 shows the formation of vulcanized rubber from natural rubber .

Rajah 11 menunjukkan pembentukan getah tervulkan daripada getah asli.

C ~ c VulcanizationPemvu/kanan

DiagramRajah

Which of the following statement is true about the above diagram .

nt ra penyataan berikut yang manakah benar mengenai rajah di atas.

A Substance Y is disulphur dichloride solutionBahan Y adalah larutan disulfur diklorida

' B. . f . _ f \V U I C a n i z e drubber is less easily OXidized

, eia h tidak tervulkan tidak mudah dioksidakanr l ~ , ~ ~ f . '

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~ C 0 _ V ul~~ n i z e drubber becomes soft and sticky easily in organic solvent.f ~ ~ ~ _ l.~ tervulkan mudah menjadi lembut dan me/ekit dalam pe/arut organik.

< : s ~ b s t a n c eY is hydrogen sulphide acid ~ . Bahan Y adalah asid hidrogen su/fida .

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39. Diagram 12 below shows the structural formula of an ester molecule

Rajah 12 di bawah menunjukkan formula struktur bagi suatu molekul ester.

0

tCH3 C H 2 C 0 C H 1

Diagram 2Rajah 2

Which of the following reactants is used to prepare the above ester

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Antara yang berikut manakah bahan tindak yang digunakan untuk menyediakan ester

seperti di atas

A Propanoic acid and methanol

Asid propanoik dan metana/

8 Methanoic acid and propanol

Asid metanoik dan propanol

C Ethanoic acid and ethanol

Asid etanoik dan etanol

D Butanoic acid and methanol

Asid butanoik dan metanol

40. Which of the following equations represent a redox reaction?

Antara persamaan berikut manakah mewakili tindak balas redoks?

CuO + H2S04 --- CuS04 + H20

II 2HCI + Zn --- ZnCb + H2

Ill Ag + r --- AgCI

2CI-+S

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41 . Diagram 13 shows the apparatus arrangement to investigate the oxidation and reduction

in terms of the transfer of electrons at a distance.

Rajah 13 menunjukkan susunan radas bagi mengkaji pengoksidaan dan

penurunan berdasarkan pemindahan elektron pada satu jarak.

Iron II) sulphateFerum II) sulfat

Diagram 13

Rajah 3

Acidified PotassiumManganate VII) solution

Kalium mangganat V/1)berasid

Dilute sulphuric acid- - - - - - -Asid sulfuric cair

Which of the following statement is true about the reaction occurs.

Antara berikut pernyataan manakah adalah benar tentang tindak balas yang berlaku.

A lron ll) ion, Fe + is reduced

Jon Ferum /1) mengalami penurunan Fe +

. B Electrons flow from electrode P to Q

Efektron mengalir dari efektrod P ke Q

C The purple colour of solution becomes green



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4 . Diagram 14 below shows the mechanism of rusting.

Rajah 14 di bawah menunjukkan mekanisma pengaratan

Water dropletTitisan ir

Diagram 14

Rajah 4

Which of the following equation occurs at the anode?

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Antara pemyataan berikut yang manakah menunjukkan persamaan yang berlaku di

nod?

A Fe ~ 2e

B 02 2H20 4e 40H-

C 40H- 02 2H20 4e

D Fe2

2e Fe

43 . .Tabl e 4 below shows the results of an experiment to investigate the effect of metals on

the rusting o iron.

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44 . Diagram 15 below shows the apparatus set up to measure the heat energy given out in

the reaction between magnesium and iron sulphate solution. The experiment is repeated

by using zinc and iron sulphate solution.

Rajah 15 di bawah menunjukkan susunan radas untuk mengukur tenaga haba yang

dibebaskan di dalam tindak balas antara magnesium dan larutan besi sulfat. Eksperimen

ini diulang dengan menggunakan zink dan larutan besi sulfat.

agnesium p o w e r ~Serbuk magnesium \ \, I Plastic cup

I l

Cawan plastik

Iron II) sulphate solutionLarutan besi II) su fat

Diagram 5Rajah 5

Which of the following has to be constant for the reaction?

Antara yang berikut, manakah yang perlu dikekalkan dalam tindak balas ini?

A The size of the spatulaSaiz spatula

B The position of the thermometerKedudukan termometer

C The volume of the iron ll) sulphate solutionlsi padu larutan ferum /1) sulfat

fl .

: ;~ t i m etaken to read the temperature of the mixture~ i f t J 1o masa membaca suhu campuran. ;s:; . )



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47 . An acid HX and an alkali YOH, both with the same concentration, are mixed in different

volume ratios as shown in the table below. Which of the following sets of mixture will

produce the highest rise in temperature?

Satu asid X dan satu alkali YOH yang mempunyai kepekatan yang sama dicampurkanpada nisbah isipadu seperti yang ditunjukkan pada jadual di bawah Antara larutan set

berikut yang manakah akan menghasilkan kenaikan suhu yang paling besar?

Vblume o X ~ ~ - V o l m~ of YO I f{ 3 . ' ,-

-. ~ S . i p a d uvoH cm 3J/sipadu H> cm 3 / ~ 0 . . . _ ~- ~ ~U ~ [ Pk menentusahkan kation dan anion dalam sebatian tersebut.*-':: Oo ; , ~ _

-~ ; ; ; :- ' [5 marks][5 markah]

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8. Diagram 8 shows the set-up of the apparatus to study the heat of displacement .

Rajah 8 menunjukkan susunan radas bagi mengkaji haba penyesaran.

Beaker that contain

2 g zinc powder f . : :(excess)

Bikar yang mengandungi 2gserbuk zink berlebihan)

n ThermometerTermometer

I Polystyrene cupCawan polistren

50.0 cm3

copper(ll) sulphate= ~ ~ ~ ~ ~ ~ ~ J { ~ ~ Jsolution 0.1 mol dm

3

50 .0 cm /arutan kuprum II)sulfat 0. 1 mo dm

Diagram 8Rajah

The following data was obtained in table 8 :

Data yang berikut te/ah dipero/ehi di dalam jadua/ 8 :

Initial temperature of copper(ll) sulphate solution

Suhu awa/larutan kuprum{/1) sulfat

The highest temperature of the mixture

Suhu tertinggi campuran

TableJadua 8

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29.0

34 .0

[3 marks]

[3 markah)

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b) i) Write an ionic equation for the displacement reaction above.

Tuliskan persamaan ion bagi tindak balas penyesaran di a las .

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[2 marks]{2 markah]

ii) Calculate the heat of displacement for this experiment if excess zink powder

is added to 50cm 3 copper ll) sulphate solution 0 .1 mol dm -3

[Specific heat capacity of solution= 4 .2 Jg- 1C .,Density of solution=1.0 gcm-3]

Hitungkan haba penyesaran bagi eksperimen ini jika serbuk zink ditambah

secara berlebihan kepada 50 cm3

larutan kuprum /1) sulfat 0. 1 mol dm 3

{Muatan haba tentu larutan =4.2 Jg 1C . Ketumpatan /arutan = 1.0gcm- 3)[4 marks]

[4 markah]

iv) Why is the value of heat of displacement obtained in the experiment is less than

the theorical value?

State two precautions that should be taken during the experiment.

Mengapakah nilai haba penyesaran yang diperoleh dalam eksperimen ini adalah

kurang daripada nilai teori?

Nyatakan du langkah berjaga-jaga yang perlu diambil ketika menjalankan

eksperimen ini .

[3 marks][3 markah]

v) Predict the value of temperature change when 0.2 mol dm-3 of copper II)sulphate solution is used to replace 0 .1 mol dm -3 of copper II) sulphate solution.Explain your answer .

Rama/kan nilai perubahan suhu apabi/a larutan kuprum II) sulfat 0.2 mo

dm -3 digunakan bagi menggantikan larutan kuprum II) sulfat 0 .1 mol dm -3

@ 2012 Hak Cipta MPSM Pahang 9

[2 marks]{ 2 markah)



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c i) Draw an energy level diagram for the reaction.

Lukiskan gambar rajah aras tenaga bagi tindak balas ini

ii) Explain the diagram based on:

Terangkan gambar rajah tersebut berdasarkan:

Type of reaction.

Jenis tindak balas

Energy content of the reactants and products .

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[3 marks][3 markah}

Kandungan tenaga bagi bahan tindak balas dan hasi/ tindak balas

Formation and breaking down the bond .

Pembentukan dan pemutusan ikatan

2012 Hak Cipta MPSM Pahang 2

[3 marks][3 markah]



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Section CSahagian C

[20 marks]

{20 markah]

Answer any one question from this sectionJawab mana-mana satu soalan dari bahagian ini

9. (a) Diagram 9 .1 shows the label on a pack of food.

Rajah 9 1 menunjukkan label bagi suatu bungkusan makanan.

YAMMY BAKED BEANS

Ingredients:Beans, sugar, tomato puree, salt and spice, permitted modifiedstarch .

et Weight120 gram

Bahan bahanKacang gula pur i tomato garam dan rempah kanj idiubahsuai

yang dibenarkan.

Diagram 9.1

Rajah 9 1

Beret bersih120 gram

r ; , . ~ .~ ~ = ~ ~ . . . ~5 '"

4541 2

- ~ ... \ ;S ta t ~: : t ; w otypes of food additive found on the label and state the function for" "';,\'

12 ~ eac lrtype of food additives.~ ~ ~ - '~ j ~ ~1 - f J k ndua jenis bahan tambah makanan yang terdapat pada label itu dan

~ ( . r ' D o ; , i C : : .V / ak a nfungsi bagi setiap bahan tambah makanan tersebut.~ ~ . Y . , '

@ 2012 Hak Cipta PS Pahang 21

[ marks)[4 markah]



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ii) What are the advantage and disadvantage of using food additives?

Apakah kebaikan dan keburukan menggunakan bahan tambah makanan?.

b) Diagram 9.2 shows the structural formula of a soap.

Rajah 9.2 menunjukkan formula struktur bagi suatu sabun.

[ 2 marks[ 2 markah

CH 3 ,...CH2 ,...CH2 ..CH2 ..CH2 ..CH2 ,...CH2 ..CH 2 ,...CH2Y O - N aCH

2CH

2CH

2CH

2CH

2CH

2CH

2CH

2

art ASahagian

Diagram 9.2Rajah 9.2

0

Ly Jart B

Sahagian S

Name Part A and Part 8 structured. State their properties.Namakan bahagian A dan bahagian B Nyatakan sifat-sifat mereka.

[4 marks{4 markah

c fYta ; . . . 9.3 shows the apparatus set-up to investigate how to remove oily stain fromr ; ~ r~ - a c l ot i {~ observation is made before and after the experiment.

: r c.c '

\ ~tf hl ~~i 3menujukkan susunan radas yang digunakan untuk mengkaji bagaimana~ ~ - - ' i f O r . . i h k nkesan minyak daripada sehelai kain. Pemerhatian dibuat sebelum dan

s ~ f ep a seksperimen .

@ 2012 Hak Cipta MPSM Pahang 22 [ ihat halaman sebelah]


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Soap

Sabun

Experiment IEksperimen I

Hard waterir fiat

ClothKain

Oily stainKesan minyak

Before experimentSebelum eksperimen

Hard waterir fiat

ClothKain

Hard waterir fiat

ClothKain

Experiment IEksperimen I

Oily stain remainKesan minyak kekal

Oily stain removeKesan minyak

hifang

After experimentSe/epas eksperimen

Diagram 9 3Rajah 9 3

4541 2

Detergent

etergen

Experiment IIEkperimen II

Experiment IIEksperimen II

:J. : ' s . i 1~ the observation, compare and explain the effectiveness of the cleansing7::.-..:; ,.ta ction \ e ndetergent and soap in hard water

~~ r r sq pemerhatian,banding dan terangkan keberkesanan tindakan pencucian~ 9 : f ./ "f,i.t

~ R : _ . >"- v~ ; ; - -, ~ r ..... / A ~\ i ~ ~ 0 : ~ ?

'u BelJdWim llr)lbllll

p

I I 1:1.

Na M&Sodba

%J 24

If 7/J ll ::::

K 01 Sc nPOCIIIWID Ctlc:lu:= S


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MAKLUMATUNTUKCALON

1. Kerlas soalan ini mengandungi tiga bahagian: Sahagian A Sahagian S dan

Sahagian C

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2 Jawab semua soalan dalam Sahagian A. Tulis jawapan bagi Sahagian Ada/am ruangyang disediakan dalam kerlas soalan.

3. Jawab satu soa/an daripada Sahagian S dan satu soalan daripada Sahagian C

Tu/iskan jawapan bagi Sahagian B dan Sahagian C pada halaman bergaris dibahagian akhir kerlas soalan ini Jawab Bahagian B dan Bahagian C dengan terperinci .Anda bo /eh menggunakan persamaan gambar rajah jadual gr f dan cara lain yangsesuai untuk menje/askan jawapan anda.

4 Tunjukkan kerja mengira ini membantu anda mendapatkan markah.5 Sekiranya and a hendak membatalkan sesuatu jawapan buat garisan di at as jawapan

itu

6. Rajah yang mengiringi soalan tidak di/ukis mengikut skala kecua/i dinyatakan .7 Markah yang diperuntukkan bagi setiap soa/an atau ceraian soalan ditunjukkan da/am

kurungan.

8. Masa yang dicadangkan untuk menjawab Sahagian A ialah 90 minit Sahagian S ialah30 minit dan Sahagian C ialah 30 minit.

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

10 . Serahkan semua kertas jawapan and a di akhir peperiksaan .11 . J DU L SERK L UNSUR DISEDI K N Dl H L M N 26

INFORMATION FOR CANDIDATES

1 This question paper consists of three sections: Section A Section S and Section C.2 Answe r all questions in Section A. Write your answers for Section A in the spaces

provided in the question paper.3 Answer one question from Section B and one question from Section C Write your

answers for Section B and Section C in the lined pages at the end of the questionpaper. Answer questions in Section and Section C in detail. You may use equationsdiagrams tables graphs and any other suitable method to explain your answer.

4 Show your working in calculations it may help you to get marks .5 If you Wish to cancel any answer neatly cross out the answer .6 The diagrams in the questions are not drawn to scale unless stated.

7 . Marks allocated for each question or parts there of are shown in brackets.8 s u g g e s t e dto complete Section A is 90 minutes Section S is 30 m inutes and

~ e e i ~ 30 minutes: ,~ -4 .. ..... . '

43/ Y >Umay ~e ~ non-programmable scientific calculator.~~ 0 . H~ ~ in all r ~ u ranswer sheets at the end of the examination .1 _ . THii;filER t tC TABLE OF ELEMENTS IS PROVIDED ON PAGE 26

~ ~ r- V I~ v f i _ . . A < o c - - ~

~ - ~ - - ~

@ 2012 Hak Cipta MPSM Pahang 27 [ Lihat halaman sebelah ]


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CHEMISTRYKertas 3OKT 2 12

1 1 2 JAM

NAMA

KELAS

GURU

PEPERIKSAAN PERCUBAAN SPM TAHUN 2012TINGKATAN 5

CHEMISTRYPaper 3

1 hour 30 minutes

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

4541/3

DO NOT OPEN THIS QUESTION PAPER UNTIL YOU ARE TOLD TO DO SO

1 Tuliskan nama kelas dan nama guru andapada ruangan yang disediakan

2 Kertas soalan ini adalah dalam dwibahasa

3 Soalan di bahagian atas adalah dalamBahasa lnggerls Soalan di dalam tulisancondong adalah dalam Bahasa Melayu yangsepadan

4 Calon dibenarkan menjawab keseluruhan atausebahagian soa an sama ada dalam BahasaMelayu atau Bahasa lnggeris

5 Calon dikehendaki membaca maklumat dihalaman 2

Kod PemeriksaSoalan

1

2

3

JUMLAH

Markah MarkahPenuh Dioeroleh

18

15

17

Kertas soalan ini mengandungi 14 halaman bercetak

@ 2012 Hak Cipta MPSM Pahang [Lihat halaman sebelah



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2 4541 3

MAKLUMAT UNTUK CALON

1 Jawab semua soa/an.

2 Jawapan kepada Soalan dan soalan 2 hendaklah ditulis dalam ruangan yangdisediakan dalam kertas soalan.

3 Jawapan kepada Soalan 3 hendaklah ditulis pada he/aian tambahan . Anda bo/ehmenggunakan persamaan gambar rajah jadua/ graf dan cara lain yang sesuai untukmenjelaskan jawapan anda .

4 Tunjukkan kerja mengira ini membantu anda mendapatkan markah.

5 Sekiranya and a hendak membatalkan sesuatu jawapan buat garisan di at as jawapan itu .

6 Rajah yang mengiringi tidak dilukiskan mengikut ska/a kecua/i dinyatakan .

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

8. Mas a yang dicadangkan menjawab Soa/an 1dan soa/an 2 ialah 45 min t dan Soa/an 3ia/ah 45 minit .

9 Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

10 Kertas soa/an ini hendaklah diserahkan di akhir peperiksaan.

Pemberian markah :

Markah Penerangan3 Cemerlang : Respons yal} gpaling baik2 Memuaskan : Respons yal} gsederhana1 Lemah: Respons yang kural} g tejl at0 Tiada respons atau res_ _ons salah

@ 2012 Hak Cipta MPSM Pahang [ Lihat halaman sebelah


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3 454113

INFORMATION FOR CANDIDATES

1 Answer all questions.2 Write your answer for Question 1 and Question 2 in the spaces provided in the question

paper.

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

4 Show your working it may help you to get marks .

5 Ifyou wish to cancel any answer neatly cross out the answer .

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

7 Marks allocated for each question or part question are shown in brackets .

8. The time suggested to answer Question 1and Question 2 is 45 minutes and Question 3 is45 minutes.

9 You may use a non-programmable scientific calculator .

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

Marks awarded :

Mark Description3 Excellent: The best r ~ o n sprovided2 Satisfactory: An average response provided1 Weak : An inaccurate response provided0 No response or wrong response provided

@ 2012 Hak Cipta MPSM Pahang lhat halaman sebelah


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4541 3

1. Table 1 shows the observations in three test tubes used to investigate the effect of other

metals on rusting. A mixture of jelly solution, potassium hexacyanoferrate Ill),

K3Fe CN)e solution and phenolphthalein were used as medium in each test tube . Theobservations were recorded after one week .

Jadual 1 menunjukkan pemerhatian dalam tiga buah tabung uji yang digunakan untuk

menyiasat kesan logam lain ke atas pengaratan. Medium yang digunakan di dalam

setiap tabung uji adalah campuran larutan agar-agar. Larutan kalium

heksasianoferat /11) , K3Fe CN)s dan fenolftalein. Pemerhatian direkod selepas satu

minggu .

Test

tubeTabung

uji

Set -up of apparatus

Susunan radas

Jelly solution +potassiumhexacyanoferrate Ill),K3Fe CN)s solution +

Iron nail phenolphthaleinPaku besi

Copper strip Larutan agar-agar,Kepingan ........,:1\ l >o_larutan kaliumkuprum heksasianoferat Ill) ,

K3Fe CN)6 danfeno/ftalein

Jelly solution +potassiumhexacyanoferrate Ill),K3Fe CN)s solution +phenolphthalein

Larutan agar-agar,larutan kaliumheksasianoferat Ill),K3Fe CN)6 danfenolftalein

Observation

Pemerhatian


UntukKegunaanPemeriksa


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Ill

\

5

Jelly solution +...-:-::-:- potassium

= ~ r hexacyanoferrate Ill),_ ~ = ~ K3Fe CN)Bsolution +

Iron nail 1; ioii::l[: :: phenolphthaleinPaku besi ~ -

- ~0

Larutan agar-agar,larutan kaliumheksasianoferat Ill),K3Fe CN)6 danfenolftalein

Table

Jadua 1

4541 3

UnlukKegunaanPemeriksa

a Complete the observations in the Table 1 above .Lengkapkan pemerhatian dalam Jadual 1 di atas.

[ marks] em3{ markah

b State one inference for each test tubes I II and Ill.Nyatakan s tu inferens untuk setiap tabung uji / II dan Ill .

Test tube 1:Tabung uji 1

Test tube II:Tabung uji II:

t_tube Ill : _ ~ f luji Ill:

_ . : , . ~ v

. ....... ~ : :{ . .. .... ....... 0 0 0 c O -;

@ 2012 Hak Cipta MPSM Pahang

[ 3 marks] I:=J{ markah l___l2j



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4541 3

c) State the hypothesis for the experiment.Nyatakan hipotes is bagi eksperimen tersebut

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

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

d) For this experiment, stateBagi eksperimen ini nyatakan

i) The manipulated variable:Pembolehubah dimanipu/asi :

[ 3 marks][ 3 markah

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

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

ii) The responding variable :Pembolehubah bergerak balas:

iii) The constant variable :Pembolehubah dima/arkan :


[ 3 marks 1 r =J[ 3 markah Ll2J

@ 2012 Hak Cipta MPSM Paha ng [ Lihat h l m n sebel h


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7

e State the operational definition for the rusting of iron nail.Nyatakan definisi secara operasi bagi pengaratan paku besi.

f Diagram 1 shows the apparatus set-up of an experiment.

Rajah 1 menunjukkan susunan radas bagi satu eksperimen.

Jelly solution Larutan agar-agar

+

Potassium hexacyanoferrate Ill), K 3 Fe CN) 6Larutan kalium heksasianoferat (Ill), K Fe(CN)s

+

Phenolphthalein lfenolftalein

Iron nail coiled with lead strip

Paku besi dililit dengan kepingan plumbum

Diagram 1Rajah 1

Predict an observation for the experiment after a week.Ramalkan pemerhatian daripada eksperimen itu selepas satu minggu.

4541 3

[ 3 marks 1{ 3 markah

[ 3 marks 1[ 3 markah


Untukegunaan

Pemeriksa

[ jTotal1


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4541 3

2. Diagram 2 shows the set up of apparatus to determine the heat of combustion foralcohols .

Rajah 2 menunjukkan susunan radas untuk menentukan haba pembakaran alkohol

Thermometer

Termometer

Wind shieldPenghadang angin

Spirit lamp

Lampu pelita

AlcoholsAlkohol

Diagram 2Rajah

Copper can

Tin kuprum

Waterir

Tripod standTungku kaki tiga

Wooden block

Blok kayu

Three sets o experiments are carried out to determine the heat of combustion odifferent types of alcohols .



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Set

II

9

Initial thermometer readingBacaan awal termometer

5

4

3

1

1

iagram 2 1Rajah 2 1

@ 2 12 Hak Cipta MPSM Pahang

4541 3

Highest thermometer readingBacaan tertinggi termometer

6

s

4

30

2

6

5

4

3

2

[ ihat halaman sebelah


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1 4541 3

a) Record the initial thermometer readings and highest thermometer readings in Set ISet II and Set Ill at space provided in Diagram 2.1

Rekodkan bacaan awal termometer dan bacaan tertinggi termometer dalam Set /Set II dan Set J 1 pada ruang yang disediakan pada Rajah 2 1

[ 3 marks][ 3 markah]

b) Construct a table to record the initial temperature of water, highest temperature ofwater and increase in temperature in Set I Set II and Set Ill.

Bina satu jadual untuk merekodkan suhu awal air suhu tertinggi dan kenaikan suhudalam Set/, Set II dan Set Ill

3 marks][ 3 markah]

@ 2012 Hak Cipta MPSM Pahang [ ihat halaman sebelah

UntukKeguna anPemeriksa


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Table 2 shows the heat o f combustion of four alcohols.Jadual 2 menunjukkan haba pembakaran bagi em pat enis alkohol .

Alcohol

Alkohol

Methanol

Metanol

Ethanol

Etanol

Propanol

Propanol

Butanol

Butanol

Molecular formula

Formula molekul

CH 30 H

C2HsOH

C 3H10H

C4H90H

Table 2

Jadua 2

Heat of combustion KJmor 1

Haba pembakaran KJmof 1

728

- 1376

-2016

2678

c) Sketch a graph to show heat of combustion of alcohols in Table 2 against number ofcarbon atoms per molecule.

Lakar graf untuk menunjukkan haba pembakaran bagi alkohol dalam Jadual 2. me/ a wan atom karbon per molekul.


[ 3 marks ] r =J{ 3 markah] lJ2J



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12

Diagram 2 2 shows the energy level for combustion of ethanol

Rajah 2 2 menunjukkan aras tenaga untuk pembakaran eta no/

EnergyTenaga

.6. H = 726 KJmol 1

Diagram 2 2Rajah 2 2

d) State thr ee informations from Diagram 2 2

Nyatakan tig maklumat berdasarkan Rajah 2 2

4541 3

1. .. ..

2 : .. .. .. .. .. ..

3 ...... . ..... ... . ... .................. . ................. . ............ . . ... ... ....... .


[ 3 marks ] \ =J{ 3 markah] L.l.:J



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3 4541 3

e) Alcohol isone example of carbon compounds .

Classify the following carbon compounds into hydrocarbons and non-hydrocarbons .

Alkoho/ ada/ah satu contoh sebatian karbon .

Kelaskan sebatian karbon berikut kepada hidrokarbon dan bukan hidrokarbon.

Ethene C2H4

Etena C H4

Methanoic acid, HCOOH

Asid Metanoik HCOOH

@ 2012 Hak Cipta MPSM Pahang

propanol, C3H10H

propanol C3H70H

Prophyl ethanoate CH 3COOC3H7

propil etanoat CH3COOC3H1

[marks]{ markah]

[ Llhat halaman sebelah

UntukKegunaanPam eriksa

Tota12


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4 4541 3

3

Snail body covered by a cone-shaped shell. What is the chemical compound found in the shells

so hard and waterproof? Actually, the above mentioned shell consists of calcium carbonate,

CaC03 which is insoluble salt.

Badan siput dilindungi oleh cengkerang yang berbentuk kon . Apakah sebatian kimia yang

terdapat pada cengkerang itu supaya keras dan kalis air? Sebenarnya cengkerang terdiri

daripada ka/sium karbonat CaC 3 iaitu garam yang tidak larut .

Referring to the situation above, plan a labarotary experiment to compare the solubility of nitrate

salt , sulphate salt, carbonate salt and chloride salt in water.

Berdasarkan situasi di atas, rancang satu eksperimen untuk membandingkan keterfarutan

garam nitrat garam sulfat garam karbonat dan garam k/orida dalam ai r .

Your planning should include the following aspect:

Perancangan anda hendaklah mengandungi aspek-aspek berikut:

a Problem statementPernyataan masalah

b All the variablesSemua pembolehubah

c HypothesisHipotesis

d List of materials and apparatusSenarai bahan dan radas

@ 2012 Hak Cipta MPSM Paha ng

END OF QUESTION PAPERKERT S SO L N T M T

[ 17 marks]{17 markah

[ Lihat halaman sebelahhttp://cikguadura.wordpress.com/


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`

SULIT 4541/1/PP 4541/1/PP PERATURAN PERMARKAHAN CHEMISTRY Kertas 1 OKT/NOV 2012

MAJLIS PENGETUA SEKOLAH MALAYSIA NEGERI PAHANG

PERATURAN PERMARKAHAN PEPERIKSAAN PERCUBAAN TAHUN 2012

CHEMISTRY Tingkatan 5

SKEMA KERTAS 1

MAKLUMAT UNTUK PEMERIKSA KERTAS

1. Kertas skema ini mengandungi 50 jawapan untuk soalan objektif. 2. Kertas skema ini adalah sulit sehinggalah tamat peperiksaan percubaan SPM 2012. 3. Terima kasih.

Kertas skema ini mengandungi 2 halaman bercetak

2012 Hak Cipta MPSM Pahang [Lihat halaman sebelah SULIT



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`

SULIT 4541/1

Marking sheme Chemist ry Paper 1 Form 5

( TRIAL EXAM 2012 @ MPSM Pahang)


SULIT

No.Soalan

AnswerNo.

Soalan Answer

No.Soalan

AnswerNo.

Soalan Answer

1 A 14 C 27 C 40 B

2 C 15 C 28 B 41 B

3 D 16 C 29 B 42 A

4 D 17 D 30 D 43 A

5 C 18 C 31 C 44 C

6 C 19 C 32 B 45 C

7 C 20 C 33 C 46 D

8 A 21 B 34 A 47 C

9 D 22 B 35 B 48 D

10 D 23 B 36 A 49 C

11 B 24 D 37 B 50 C

12 D 25 A 38 A

13 A

26C

39 A



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SULIT 1 4541/2/PP

@ 2012 Hak Cipta MPSM Pahang Lihat halaman sebelahSULIT

4541/2/PPPeraturan PermarkahanChemistryKertas 2 Okt/Nov 2012

MPSM PAHANG

PEPERIKSAAN PERCUBAAN SPM TAHUN 2012

TINGKATAN 5

CHEMISTRY

Kertas 2

PERATURAN PEMARKAHAN

_____________________________________________________________________

Kertas skema ini mengandungi 10 halaman bercetak

Amaran

Peraturan pemarkahan in i adalah SULIT.



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SULIT 2 4541/2/PP

@ 2012 Hak Cipta MPSM Pahang Lihat halaman sebelahSULIT

MARKING SCHEME / SKEMA PERMARKAHAN

CHEMISTRY PAPER 2

TRIAL SPM MPSM PAHANG 2012

NO Answers Marks

1.a)

b)(i)

(ii)

c)

d)(i)

(ii)

e)(i)

C 3H6

CnH2n+1 OH

C 3H7OH C 3H6 + H 20

H H H H H H

H- C C- C - H

H C C C -O H

H H H H OH H

Propan-1-ol Propan-2-ol

(any one)

Propane

C3H6 + H 2 C 3H8

-Formula reactant correct

-Formula product correct

Propyl ethanoate

1

1

1

1+1

1

1

1

1

9

2.a)

(i)

(ii)

Number of proton in nucleus of its atom

15

1

1

b) Nucleon number 1

c)(i) Q and R have different number of neutron/nucleon number 1

(ii) Carbon 14 - to estimate the age of fossils and artifactsCobalt 60 - kill cancer cells,sterilised medical instruments

Sodium 24-detect leakage of underground pipes

(any one)

1

d (i)

(ii)

iii)

2.8.7

7

Draw diagram:

1

1

R



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SULIT 3 4541/2/PP

@ 2012 Hak Cipta MPSM Pahang [Lihat halaman sebelahSULIT

Figure of electron arrangement of R

3 shells

1

1

9

3.a)

( i)

(ii)

(iii)

b)

c)

d)

e)

f)

g)

Z

Q

Y

Q, P, Z, Y, T

4

Z has higher number of protons than T. Hence it has stronger

nuclei attraction on the electrons.

Y3+

Transition Elements

Their ions or compounds are colored//They form complex

ions or compounds/they are good catalysts//They can have

variable oxidation.

1

1

1

1

1

1 + 1

1

1

1

10

4.a)

b.(i)

(ii)

(c)

d)(i)

(ii)

e)

H+ , Cu 2+ ,

SO 42- , OH -

Bubbles of gas released

Concentration of Cu 2+ decrease // Cu 2+

discharge to form Cu atom

Cu 2+ + 2e Cu

Anode become thinner / smaller / mass

decreaseCathode become thicker / bigger / mass

increase

Correct diagram

Copper electrode at anode

Steel spoon at cathode

Copper (II) sulphate as electrolyte

Correct label

1

1

1

1

1

1

1

1

1


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SULIT 4 4541/2/PP


f) Hydroxide ion 1

10

5.a)

b)

c)

d)

e)

f)

g)

Pink to colourless

The point in the titration at which the indicator changes

colour

H2SO 4 + 2NaOH Na 2SO 4 + 2H 2O

Sodium sulphate and water

M1V1 = 1M2V2 2

0.25 V 1 = 10.5 25 2

V1 = 1 0.5 252 0.25

= 25cm 3

50 cm 3

i) Vinegar is used to cure wasp sting that alkaline in nature

ii) Toothpaste contain bases to neutralize acid produce bybacteria

1

1

1+1

1

1

1

1

1

1 + 1

11

6.

a)

b)

c)

d)

Redox reaction is a reaction in which oxidation and reduction

occur at the same time

Oxygen and water

Fe Fe 2+ + 2e

Label of water droplet, oxygen and iron

Label of anode and cathode

Draw arrow from negative to positive pole iron

1

1

1

1

1

1


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SULIT 5 4541/2/PP


e)

f)

Electron transfer form anode to cathode

Oxygen in water gains electrons

Hydroxide ion is form

Using sacrificial metal // sacrificial protection /

By alloying /

By tin platting /

By galvanizing

(Any two)

1

1

1

1+1

117

a)

Correct axis with unit

Correct and Smooth line

Correct scale

1

1

1

0

1

2

3

4

5

6

1 2 3 4 5 6 7

h e i g h t o f p r e c i p i t a t e / c m


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SULIT 6 4541/2/PP


b.

(i)

(ii)

c)

d.(i)

(ii)

iii)

Pb(NO 3)2 + 2KI PbI 2 + 2KNO 3

Volume of Pb(NO 3)2 = 2.5 cm 3

No of mole Plumbum (II) ion = 1 x 0.0025 = 0.0025 mol

No of mole iodide ions = 2 x 0.0025 = 0.005 mol

Pb 2+ +2 I - PbI 2

Correct reactants and products

Balance equation

Salt X = Copper (II) carbonate

Gas Z = Carbon dioxide

Y precipitate = Barium sulphate

CuSO 4 + Ba(NO 3)2 Cu(NO 3)2 + BaSO 4

Correct reactants and products

Balance equation

1. Add sodium hydroxide solution.

2. Blue precipitate formed indicates the presence of Cu + ion.

3. Add hydrochloric acid.

4. Add barium chloride solution.

5. White precipitate formed indicate the presence of SO 42-

ion.

1 + 1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

1

20

8.a) 1. the mixture becomes hot

2. the thermometer reading increase3. zinc powder dissolves4. brown solid/precipitate formed5. the blue solution turn colourless

(Any three)

1+1+1


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SULIT 8 4541/2/PP


(ii) Exothermic reaction//heat released to the surrounding

Energy content of reactants is higher than energy

content of products

Heat absorbed to break down the bond is lower than

heat released to form a bond

1

1

1

20

9

a.(i)

(ii)

b.

c.

1. Tomato puree is used as a colouring agent to restore the

colour of the food.

2. Sugar // spice is used as a flavouring agent to enhance

the taste of food

3. Permitted modified starch is used as thickener to thicken

food.

(Any two)

Advantage :

i) to prevent food from spoilage

ii) to improve appearance, texture or taste

Disadvantage:

i) Lead to serious diseases like asthma, and cancer

- Part A is hydrophobic: Soluble in oil or grease

- Part B is hydrophilic: Insoluble in oil or grease//soluble in

water

1. Hard water contain Mg2+ and Ca2+ ion

2. Detergent does not form scum in hard water

3. Soap form scum in hard water

4. Mg 2+ and Ca 2+ in hard water react with soap

5. Soap molecule consist of hydrophobic and hydrophilicpart

6. Hydrophobic part dissolve in oil

7. Hydrophilic part dissolve in water

8. During scrubbing/rinsing the oily stains/spots is

2+2

1

1

1 + 11 + 1

1

1

1

1

1

1

1

1


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SULIT 9 4541/2/PP


washed away

9. Cloth in experiment II /detergent is cleaner than clothin experiment I

10. Detergent in hard water is more effective than soap.

1

1

20

10.

a.(i)

(ii)

b)

c)

The speed at which reactant are converted into product in a

chemical reaction// change in selected quantity of reactant or

produrt per unit of time taken.

Total surface area / concentration of reactant / temperature

of reactant / use of catalyst / pressure of gaseous reactant

(any 4)

To make the coffee powder and sugar dissolve easier inwater.

The heat given to the water will give more kinetic energy tothe particles.

The particles of water, coffee powder and sugar move faster.

They will collide each other more frequent.

The frequency of effective collision will increase.

Precipitate : Sulphur

Materials:0.2 mol dm -3 sodium thiosulphate, 1.0 mol dm -3 sulphuricacid, a piece of white paper marked X at the centre.

Apparatus:150 cm 3 conical flask, stopwatch, 50 cm 3 measuring cylinder,10 cm 3 measuring cylinder, thermometer, Bunsen burner,wire gauze.

Procedure:Using a measuring cylinder, 50 cm 3 of 0.2 mol dm -3 sodiumthiosulphate solution is measured and poured into a conicalflask.

The conical flask is placed on top of a piece of white papermarked X at the centre.

1

1+1

1

1

1

1

1

1

1

1

1

1


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SULIT 10 4541/2/PP


END OF MARKING SCHEME

5 cm 3 of 1.0 mol dm -3 sulphuric acid is measured usinganother measuring cylinder.

The sulphuric acid is poured immediately and carefully intothe conical flask. At the same time, the stop watch is atarted

The mixture in a conical flask is swirled.

The X mark is observed vertically from the top of the conicalflask through the solution.

The stopwatch is stopped once the X mark disappears fromview.

Step 1 7 are repeated using 50 cm 3 of 0.2 mol dm -3 sodiumthiosulphate solution at 40 oC, 50 oC, 60 oC by heating thesolution before 5 cm 3 of sulphuric acid is added in.

(Max 8) ConclusionThe increase of temperature, increase the rate of reaction

1

1

1

1

1

1

1

20



82/95

SULIT 4541/3/PP

@ 2012 Hak Cipta MPSM Pahang 1 [ Lihat halaman sebelahSULIT

4541/3/PPPeraturan PermarkahanKimiaKertas 3OKT/NOV 2012

MPSM PAHANG

MARKING SCHEME

PEPERIKSAAN PERCUBAAN SPM 2012

TINGKATAN 5

CHEMISTRY

Paper 3

Kertas skema permarkahan ini mengandungi 14 muka surat bercetak.

Am aran

Peraturan pemarkahan in i adalah SULIT.



83/95

SULIT 4541/3/PP


Question Mark scheme score

1(a) Able to state three observations.

Sample answerTest tube I Intensity of blue colour produce is very high //

- Does not produce pink colour.

Test tube II Intensity of pink colour produce is very high //

- Does not produce blue colour.

Test tube III intensity of blue colour produce is very high //

- Does not produce pink colour.

3

Able to state any two correct observations. 2

Able to state any one correct observation 1No response or wrong response 0

1(b) Able to state one inference for each experiment

Sample answer:

Test tube I : iron rust/oxidised // iron atom released electron//

iron(II) ions/ Fe 2+ formed// iron(II) ions

present// rusting occur

Test tube II : iron does not rust// iron(II) ions are not present// zinc corrode // zinc atom release

electron// zinc ions formed // zinc oxidised

Test tube III : iron rust/oxidised // iron atom released electron

// iron(II) ions/ Fe 2+ formed // iron(II) ions

present // rusting occur

3

Able to state any two inferences 2

Able to state any one inference 1

No response or wrong response 0

1(C Able to state the hypothesis accurately

Sample answer:

When a more/ less electropositive metal is in contact with

iron/ferum/Fe, the metal inhibits/ (speeds up) rusting/ corrosion

of iron //

3


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SULIT 4541/3/PP


When a more/ less electropositive metal is in contact with

iron/ferum/Fe, rusting of iron/ferum/Fe is slower/faster

If the metal in contact with iron is higher/lower than

iron/ferum/Fe in electrochemical series, the rusting/corrosion of

iron is slower/faster//

The higher/lower the metal in contact with iron in

electrochemical series/than iron/ferum/Fe, the rusting/corrosion

of iron/ferum/Fe is slower/faster

Able to state the hypothesis correctly

Sample answer:

When a more/less electropositive metal, the metal inhibits/

(speeds up) rusting/corrosion of iron//

If the metal in contact with iron is higher than iron/ferum/Fe in

reactivity series, the rusting/corrosion of iron is slower/faster//

The rusting of iron/ferum/Fe is faster/slower, if a less / more

electropositive metal is in contact with iron/ferum/Fe

2

Able to state the idea of hypothesis

Sample answer

Different metal in contact with iron, will cause iron to rust//

Metal can cause iron to rust.

1

No response or wrong response 01 (d) Able to state the three variables correctly

Sample answer:

(i) Manipulated variable:

Type/different metals// position of metal in

electrochemical series

(ii) Responding variable:

3


85/95

SULIT 4541/3/PP


Rusting/ corrosion// presence of blue/pink colour

(iii) Constant variable:

Size/mass of iron nail// type of nail// clean iron nails//temperature// medium in which the iron nails are kept

Able to state any two variables correctly 2

Able to state any one variable correctly 1


1(e) Able to give the operational definition accurately.

Sample answer:When iron is in contact with metal lower than iron in

electrochemical series, blue colouration indicates rusting//

Rusting occurs when iron nail is in contact with copper/tin/less

electropositive metal and form blue colouration//

Blue colouration is formed when iron is in contact with metal

lower than iron in electrochemical series.

3

Able to give the operational definition correctly.

Sample answer:

Blue colouration indicates rusting//

Rusting occurs when iron nail is contact with copper/tin/less

electropositive metal

2

Able to give an idea of the operational definition.Sample answer:

Rusting occurs when the colour of solution changes.//

Rusting occurs.

1



86/95


87/95

SULIT 4541/3/PP


OR

Set Initial thermometerreading

Highest thermometerreading, C

I 27 53

II 29 57

III 27 59

Able to record three or five readings correctly 1


Question Details Score

2.b) Able to construct a table to record the initial temperature of

water, highest temperature of water and increase in temperature

for Set I, Set II and Set III

1.correct titles

2. readings and units

Sample answer:

Set I II III

Initial temperature, C 27.0 29.0 27.0

Highest temperature, oC 53.0 57.0 59.0

Increase in temperature, oC 21.0 29.0 32.00

3

Able to construct a less accurate table that contains the

following:

1. Titles

2. Readings

Sample answer:


88/95

SULIT 4541/3/PP


I II III

Initial temperature 27 C 29 27 C

Highest temperature 53.0 57.0 59.0

Increase in temperature 26 C 28 32 C

2

Able to construct a table with at least one title/ reading.

Sample answer :

I II III

Increase in temperature

1


2.c) Able to sketch the graph of heat of combustion of alcohols

against number of carbon atoms per molecule.

The graph must have the following information:

1. The axes are labeled correctly

2. Correct unit

3. Correct curve

Sample answer:3


89/95

SULIT 4541/3/PP


Able to sketch the graph of heat of combustion against number

of carbon atoms

i. without units on y-axis

ii. correct curve

sample answer:2

Able to sketch the graph with only one correct information.

Sample answer:

1

Heat of combustion, KJmol 1

1 2 3 4Number of C atom per molecule

Heat of combustion

1 2 3 4Number of carbon atom


90/95

SULIT 4541/3/PP


Or


2.d) Able to state three correct information from the diagram.

Sample answer:

1. The reaction is an exothermic reaction // heat energy is

released to the surrounding.

2. 726 KJ of heat is released when one mole of methanol is

burnt.

3. Total energy of reactant is higher than the products.

3

Able to state any two correct information. 2

Able to state any one correct information. 1

No response or wrong response. 0

2.e) Able to classify all carbon compounds correctly.

Sample answer:

Hydrocarbon Non-hydrocarbon

Ethene, C 2H4 Propanol, C 3H7OH

Methanoic acid, HCOOH

Prophyl ethanoate,

CH 3COOC 3H7

3

Heat of combustion KJmol 1

Number of C atom


91/95

SULIT 4541/3/PP


Able to classify at least three carbon compounds correctly. 2

Able to classify any one carbon compound correctly. 1

No response or wrong response. 0

QuestionNumber

Rubric Score

3(a) Ab le to g iv e th e st atem ent of prob lem correctly.

Sample answ er:

Does all nitrate, sulphate, carbonate and chloride salts aresoluble in water?

3

Ab le to g iv e th e st atem ent of prob lem correctly.

Sample answ er:

Does all salts are soluble in water?

2

Ab le to g iv e th e st atem ent of prob lem correctly.

Sample answ er:

Salt are soluble and insoluble in water

1



92/95


93/95

SULIT 4541/3/PP


3(d) Ab le to li st co mp letely the mat eri als and apparat us

Sample answer:

Material:

1. Any suitable nitrate, sulphate, carbonate and chloride

salts soluble and insoluble in water

2. Distilled water

Apparatus:

1. Test tube

2. Spatula

3

Ab le to li st inco mp letely mat eri als and apparat us .

Sample answer:

Materials:

1. Incomplete salt :

List only 3 type of salt Eg zinc nitrate, lead (II) sulphate,

calcium carbonate

2. Distilled water

Apparatus:

1. Test tube

2. Spatula

2

Ab le to g ive an idea of materi als and apparat us .

Sample answ er:

Materials:

1. Incomplete salt :

List only 2 type of salt Eg zinc nitrate, plumbum (II)

sulphate, calcium carbonate

1


94/95


95/95

SULIT 4541/3/PP

2. Pour 5 cm 3 of distilled water into the test tube


3(f) Ab le to ex hibi t th e tab ulation of dat a co rrect ly .

Sample answ er:

Salt Solubility of salt in water

Zinc nitrate

Magnesium chloride

Sodium chloride

Lead (II) sulphate

Copper (II) sulpahte

Potassium carbonate

2

Ab le to ex hi bi t t he t abu lat ion o f d ata les s acc uratel y.

Sample answ er:

Salt Solubility of salt in water

1


2012 chemistry pahang with answer

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