Kimia F4 2011 AKT

SULIT 4541/1

SMK SIMANGGANG

PEPERIKSAAN AKHIR TAHUN TINGKATAN 4 2012CHEMISTRY Kertas 1Oktober 2011

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1 ¼ jam Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini mengandungi 50 soalan.

2. Jawab semua soalan.

3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.

4. Hitamkan satu ruangan sahaja bagi setiap soalan.

5. Rajah tidak dilukis mengikut skala kecuali dinyatakan

6. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan

Kertas soalan ini mengandungi 25 halaman bercetak

[Lihat sebelah

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INFORMATION FOR CANDIDATES

1. This question paper consists of 50 questions.

2. Answer all questions.

3. Answer each question by blackening the correct space on the answer sheet.

4. Blacken only one space for each question.

5. If you wish to change your answer, erase the blackened mark that you have made.Then blacken the space for the new answer.

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

7. You may use a non-programmable scientific calculator.

MAKLUMAT UNTUK CALON

1. Kertas soalan ini mengandungi 50 soalan.

2. Jawab semua soalan

3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan.

4. Hitamkan satu ruangan sahaja bagi setiap soalan.

5. Sekiranya anda hendak menukarkan jawapan, padamkan tanda yang telah dibuat.Kemudian hitamkan jawapaan yang baru.

6. Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan.

7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan

Question 1 to Question 50 are followed by four options A, B, C or D.Choose the best option for each question and blackened the corresponding space on the objective answer sheet.

Bagi Soalan 1 hingga Soalan 50, tiap-tiap soalan diikuti oleh empat pilihan jawapan A, B, C dan D. Pilih satu jawapan yang terbaik bagi tiap-tiap soalan dan hitamkan ruangan yang sepadan pada kertas jawapan objektif anda

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1. Which of the following statements best describes ‘Chemistry’?Antara pernyataan berikut, yang manakah terbaik menerangkan ‘kimia’ ?

A Chemistry is the study gained through scientific investigations.Kimia ialah kajian diperoleh melalui penyiasatan saintifik.

B Chemistry is a systemic study of natural phenomena.Kimia ialah kajian sistemik bagi fenomena semulajadi.

C Chemistry is the study of the composition, structure, properties and interactions of matter.Kimia ialah kajian mengenai komposisi, struktur, sifat-sifat dan interaksi antara jirim.

D Chemistry is an art of transforming metals.Kimia ialah satu seni perubahan logam.

2. There are many industries involve chemistry include …Terdapat banyak industri melibatkan kimia termasuk …

I Petroleum industryIndustri petroleum

II Nutritional industryIndustri pemakanan

III Mining industryIndustri perlombongan

IV Paint making industryIndustri membuat cat

A I and II onlyI dan II sahaja

B I, II and III onlyI, II dan III sahaja

C I, II and IV onlyI, II dan IV sahaja

D I, II, III and IVI, II, III dan IV


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3 Which of the following is the best solution for an arteriosclerosis patient?Antara berikut yang manakah penyelesaian terbaik bagi pesakit arteriosklerosis?

A take food rich in calciummakan makanan yang kaya dengan kalsium

B take food rich in ironmakan makanan yang kaya dengan zat besi

C reduce fatty food intakekurangkan mengambil makanan berlemak

D reduce sugary food intakekurangkan mengambil makanan bergula

4 Which of the following substance exists as atoms?Antara bahan berikut, yang manakah wujud sebagai atom?

A EmasGold

C WaterAir

B NitrogenNitrogen

D ChlorineKlorin

5 The melting point of a substance X is -2oC and its boiling point is 75oC. What is the physical state of substance X at -5oC and 85oC?Takat lebur bahan X ialah -2oC dan takat didihnya ialah 75oC. Apakah keadaan fizikal bahan X pada suhu -50C dan 850C?

At -5oCPada -5oC

At 85oCPada 85oC

A SolidPepejal

GasGas

B SolidPepejal

LiquidCecair

C LiquidCecair

GasGas

D GasGas

SolidPepejal


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6 Diagram 1 below shows an atomic model.Rajah 1 menunjukkan suatu model atom.

Diagram 1Rajah 1

Which of the following is true about Diagram 1?Antara penyataan berikut yang manakah benar tentang Rajah 6?

A The atomic model above was proposed by Neils Bohr.Model atom di atas dicadangkan oleh Neils Bohr.

B The atom is a sphere of positive charge which contains a few electronsAtom merupakan sfera bercas positif yang mengandungi sedikit elektron.

C The electrons in an atom move in shells around the nucleus.Elektron dalam atom bergerak dalam petala-petala yang mengelilingi nukleus.

D The electrons move in a space that is larger than the space occupied by the nucleus.Electron bergerak dalam ruang yang lebih besar daripada ruang yang ditempatioleh nukleus.

7 This isotope produces gamma radiation to kill cancer cells. What is the isotope?Isotop ini menghasilkan sinar gamma untuk membunuh sel kanser. Apakah isotop ini?

A Iodine-131Iodin-131

B Cobalt-60Kobalt-60

C Sodium-24Natrium-24

D Carbon-12Karbon-12


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8 Diagram 2 shows the symbol of fluorine atom.Rajah 2 menunjukkan simbol bagi atom fluorin

19F

9

Diagram 2Rajah 2

Which of the following is true based on the symbol in Diagram 2.Antara berikut yang manakah benar berdasarkan simbol dalam Rajah 2.

Proton numberNombor proton

Nucleon numberNombor nukleon

Number of electronBilangan elektron

A 9 19 9B 9 19 19C 9 10 9D 19 9 9

9 Diagram 3 shows the electron arrangement of atom X.Rajah 3 menunjukkan susunan elektron bagi atom X.

X

Diagram 3Rajah 3

How many valence electrons are there in the atom of X?Berapakah bilangan elektron valens yang terdapat dalam atom X?

A 2 C 5

B 3 D 7


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10 Diagram 4 is a graph which shows the cooling curve for gas X.Rajah 4 ialah satu graf yang menunjukkan lengkung penyejukan bagi gas X.

Diagram 4Rajah 4

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

A From point P to point Q, kinetic energy increases as temperature decreases.Dari titik P ke titik Q, tenaga kinetik bertambah apabila suhu menurun.

B From point Q to point R, forces of attraction between particles become weakDari titik Q ke titik R, semua daya tarikan antara zarah-zarah menjadi lemah.

C At point R, all the gas X has completely meltedPada titik R, semua gas X telah melebur keseluruhannya.

D From point R to point S, heat is released to the surroundingsDari titik R ke titik S, haba dibebaskan ke persekitaran

11 The following equation represents the chemical process to extract aluminium fromaluminium oxide.Persamaan dibawah menunjukkan proses kimia untuk mengekstrak aluminium darialuminium oksida

2 Al2O3 → 4 Al + 3 O2

What is the volume of oxygen gas evolved when 204 g of aluminium oxide is used in the extraction ?Berapakah isipadu gas oksigen yang terbebas apabila 204 g aluminium oksida digunakan di dalam proses ini?[ Relative atomic mass ; O = 16 ; Al = 27, 1 mol of gas occupies 24.0 dm3 at room temperature ][Jisim atom relatif ; O = 16, Al = 27, 1 mol gas menempati 24.0 dm3 pada suhu bilik.]

A 36 dm3 C 48 dm3

B 144 dm3 D 72 dm3

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X Y

Carbon Oxygen

Carbon Chlorine

Carbon Hydrogen

Chlorine Carbon

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12 Diagram 5 shows the electron arrangement of a molecule of compound XY2. ( Only the valence electrons are shown ).Rajah 5 menunjukkan susunan elektron bagi molekul sebatian XY2 (hanyaelektronvalens yang ditunjukkan).

X and Y could be :X dan Y mungkin :

Diagram 5Rajah 5

A

B

C

D

13 Which of the following represents the electron arrangement of a noble gas?Antara berikut, yang manakah mewakili susunan elektron gas adi?

A C

R R

B D

R R


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14 Diagram 6 shows the set-up of the apparatus to determine the empirical formula of substance Y.Rajah 6 menunjukkan susunan radas untuk menentukan formula empirik bahan Y.

Hydrogen gasGas hidrogen

SubstanceYBahan Y

Diagram 6Rajah 6

What could be substance Y ?Apakah mungkin bahan Y?

I Copper(II) oxideKuprum(II) oksida

II Magnesium oxideMagnesium oksida

III Potassium oxideKalium oksida

IV Lead (II) oxidePlumbum (II) oksida

A I and IV onlyI and IV sahaja

B II and III onlyII and III sahaja

C III and IV onlyIII and IV sahaja

D I, II, III and IVI, II, III and IV

15 Table 1 shows the mass of element P and Q which react with each other.Jadual 1 menunjukkan jisim bagi unsur P dan Q yang bertindak balas.

ElementUnsur

P Q

Mass(g)Jisim(g)

0.32 0.36

Table 1Jadual 1

What is the empirical formula for the substance formed? Apakah formula empirik bagi sebatian yang terbentuk? [Relative atomic mass :P = 64 ; Q = 35.5][ Jisim atom relatif: P =64; Q = 35.5]A PQ C PQ4

B PQ2 D P2Q3


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16 2.7 g of element X reacts with 2.4 g element Y to form a substance with empirical formula of X2Y3. What is the atomic mass of Y?2.7 g unsur X bertindak balas dengan 2.4 g unsur Y untuk membentuk sebatian denganformula empirik X2Y3. Berapakah jisim atom relatif bagi Y?(Relative atomic mass : X = 27)( Jisim atom relatif : X = 27)

A 8 C 24

B 16 D 31

17 The chemical symbol of an element T is as shown :Simbol unsur T ditunjukkan seperti di bawah:

24T

12

What would be the electron arrangement of the ion formed by an atom of T ?Apakah susunan elektron bagi ion yang terbentuk oleh atom T?

A 2.8

B 2.8.2

C 2.8.8

D 2.8.8.8

18 Which of the following elements are located in group 17 of the Periodic Table?Manakah antara unsur-unsur berikut diletakkan di dalam kumpulan 17 Jadual Berkala?

A Neon and ArgonNeon dan Argon

B Lithium and PotassiumLitium dan Kalium

C Iodine and BromineIodin dan Bromin

D Nitrogen and PhosphorusNitrogen dan Fosforus


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19 The following statement is about the arrangement of the elements in the Periodic Table of elements.Pernyataan berikut adalah mengenai susunan unsur di dalam Jadual Berkala Unsur.

“Elements are arranged in order of increasing proton number in The Periodic Table. Unsur-unsur disusun mengikut nombor proton menaik dalam Jadual Berkala.”

Which of the following scientist made the above statement?Antara saintis berikut siapakah yang membuat pernyataan di atas?

A Newlands

B Meyer

C Mendeleev

D Dobereiner

20 Table 2 shows the proton number and number of electrons of several particles.Which of the following particles is an anion?Jadual 2 menunjukkan nombor proton dan bilangan elektron bagi beberapa zarah. Manakah di antara berikut merupakan anion?

ParticlesZarah

Proton NumberNombor Proton

Number of electronsBilangan elektron

P 3 2Q 9 10R 11 11S 20 18

Table 2Jadual 2

A P

B Q

C R

D S


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21 Table 3 shows the elements in Period 3 of the Periodic Table of elements. The elements can react with oxygen to form oxides.Jadual 3 menunjukkan unsur-unsur Kala 3 dalam Jadual Berkala Unsur. Unsur-unsur tersebut bertindak balas dengan oksigen membentuk oksida.

ElementUnsur Na Mg Al Si P S Cl

Table 3Jadual 3

Which of the following element forms amphoteric oxide?Antara berikut unsur manakah membentuk oksida amfoterik?

A S C Si

B P D Al

22 The number of neutrons of atom X is 20. If the number of electrons of ion X2+ is 18, what is the relative atomic mass of X?Bilangan neutron bagi suatu atom X ialah 20. Jika bilangan elektron ion X2+ ialah 18, berapakah jisim atom relatif X?

A 18 C 38

B 20 D 40

23 Which of the following is true about elements in the Periodic Table?Antara berikut yang manakah benar tentang unsur-unsur dalam Jadual Berkala?

A The metallic properties increases from left to right across a periodSifat kelogaman bertambah apabila merentasi Jadual Berkala dari kiri ke kanan

B Elements of the same group have the same physical propertiesUnsur dalam kumpulan yang sama mempunyai sifat fizik yang sama

C Group 18 elements have low melting and boiling pointsUnsur kumpulan 18 mempunyai takat lebur dan takat didih yang rendah

D Group 17 elements exist naturally as monoatomsUnsur kumpulan 17 wujud semulajadi sebagai monoatom


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24 What happens to a sodium atom when chlorine combines with sodium?Apakah yang berlaku kepada atom natrium apabila klorin berpadu dengan natrium?

A Accepts an electronMenerima satu elektron

B Donates an electronMenderma satu elektron

C Accepts two electronsMenerima dua elektron

D Shares a pair of electronsBerkongsi sepasang elektron

25 Sodium and sulphur have the proton number 11 and 16 respectively. They react to form sodium sulphide. Which of the following statements are true?Natrium dan sulfur masing-masing mempunyai nombor proton 11 dan 16. Mereka bertindakbalas membentuk natrium sulfida. Antara pernyataan berikut, yang mana adalah benar?

I A sodium atom donates an electron to form a sodium ionSatu atom natrium menderma satu elektron untuk membentuk ion natrium

II A sodium atom donates two electrons to the sulphur atomSatu atom natrium menderma dua elektron kepada atom sulfur

III A sulphur atom receives two electrons to form a sulphide ionSatu atom sulfur akan menerima dua elektron untuk membentuk ion sulfida

IV Sodium and sulphur combine to form an ionic compoundNatrium dan sulfur bergabung untuk membentuk sebatian ion.

A I and IV onlyI dan IV sahaja

B I, II and III onlyI, II dan III sahaja

C I, III and IV onlyI, III dan IV sahaja

D II, III and IV onlyII, III dan IV sahaja


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26 Table 4 shows the electron arrangement of atoms G, H, J and KJadual 4 menunjukkan susunan elektron bagi atom G,H, J dan K

Atom G H J K

Electron arrangementSusunan elektron

1 2.5 2.8.2 2.8.8.1

Table 4Jadual 4

Which of the following pairs of elements can combine to form a covalent compound?Yang manakah antara pasangan unsur-unsur berikut boleh membentuk sebatian kovalen?

A G and H

B H and J

C G and K

D H and K

27 Which of the following set of apparatus is the most suitable to be used in electrolysis of copper(II) sulphate solution?Antara susunan radas yang berikut, yang manakah paling sesuai digunakan dalam proses elektrolisis larutan kuprum(II) sulfat?

A BCarbon rodRod karbon

Copper(II) sulphate solution Larutan kuprum(II) sulfat

C D

Carbon rodRod karbon

Copper(II) sulphate solution Larutan kuprum(II) sulfat


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28 Table 5 contains information on the melting points and boiling points of substances P, Q, Rand S.Jadual 5 mengandungi maklumat tentang takat lebur dan takat didih bagi bahan-bahanP,Q,R dan S

SubstanceBahan

Melting point (ºC)Takat lebur (ºC)

Boiling point (ºC)Takat didih (ºC)

Electrical conductivity

in moltenstate

P -30 174 Cannot conduct

Q 43 182 Cannot conduct

R 119 444 Can conduct

S 688 1100 Can conductTable 5Jadual 5

Which of the following classifications of substances P, Q, R and S is correct?Antara pengkelasan berikut, yang manakah benar bagi bahan P, Q, R dan S?

Ionic compoundSebatian ion

Covalent compoundSebatian kovalen

A P and Q R and S

B R and S P and Q

C P, Q and R S

D S P

29 What is the percentage of nitrogen by mass in ammonium nitrate, NH4NO3?Apakah peratus nitrogen dalam ammonium nitrat NH4NO3 mengikut jisim?[ Relative atomic mass: H = 1, N = 14 ,O = 16][ Jisim atom relatif : H = 1, N = 14, O = 16]

A 17.50 %

B 21.21 %

C 35.00 %

D 53.85 %


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Diagram 6

Metal X/YLogam X/Y

Negative TerminalTerminal negatif

Iron/ZincFerum/Zink

IronFerum

Iron/AluminiumFerum/Aluminium

IronFerum

Zinc/CopperZink/Kuprum

ZincZink

Magnesium/AluminiumMagnesium/Aluminium

AluminiumAluminium

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30 Aqueous sodium chloride solution is an electrolyte because it hasLarutan natrium klorida berair ialah sejenis elektrolit kerana ia mempunyai

A Free moving ionsIon yang bebas bergerak

B Free moving electronsElektron yang bebas bergerak

C Free moving atomAtom yang bebas bergerak

D Free moving moleculesMolekul yang bebas bergerak

31 Diagram 7 shows a chemical cell.Rajah 7 menunjukkan sebuah sel kimia.

V

X platePlat X

Y platePlat Y

ElectrolyteElektrolit

Which of the following is true?

Diagram 7Rajah 7

Di antara berikut, yang manakah adalah benar?

A

B

C

D


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32 Diagram 8 shows the set–up of apparatus of a chemical cell.Which of the following are not true of a chemical cell?Rajah 8 menunjukkan susunan radas suatu sel kimia.Antara berikut yang manakah tidak benar mengenai sel kimia?

V

ElectrodesElektrod

Liquid HCecair H

Diagram 8Rajah 8

I The electrodes are of the same metal.Elektrod-elektrod adalah logam yang sama.

II The electrodes are of different metalsElektrod-elektrod adalah logam yang berlainan.

III Liquid H is an electrolyte.Cecair H ialah sejenis elektrolit.

IV Electrical energy change to chemical energyTenaga elektrik bertukar kepada tenaga kimia

A I and III only

B I and IV only

C II and IV only

D I, III and IV only

33 Which of the following substances is acidic?Antara bahan berikut yang manakah bersifat asid?

A AmmoniaAmmonia

B Potassium oxideKalium oksida

C Carbon dioxideKarbon dioksida

D Sodium hydroxideNatrium hidroksida


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34 It is discovered that a compound with formula AB dissolves in water. What inference can you make about the compound ?Didapati satu sebatian dengan formula AB larut dalam air. Apakah inferens yang boleh dibuat tentang sebatian itu?

A It is a covalent compoundMerupakan sebatian kovalen

B The compound ionizes in waterSebatian mengion dalam air

C The compound will dissolve in an organic solventSebatian yang larut dalam pelarut organik

D The intermolecular forces between the particles are very weakDaya antara molekul pada zarah-zarah adalah sangat lemah

35 During the electroplating of an iron key with copper, which of the following should be done?Semasa menyadurkan kunci besi dengan kuprum, yang manakah antara berikut perlu dilakukan?

I The iron key should be made the cathodeKunci besi perlu dijadikan katod

II Molten copper is used as the electrolyteKuprum lebur dijadikan elektolit

III An aqueous solution of copper (II) sulphate is made the electrolyteLarutan berair kuprum (II) sulfat dijadikan elektrolit

IV Two copper plates should be used as electrodesDua kepingan kuprum digunakan sebagai elektrod

A I and III only

B II and IV only

C I, II and IV only

D I, III and IV only


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36 Diagram 9 shows the set-up of the apparatus of an electrolytic cell.Rajah 9 menunjukkan susunan radas bagi satu sel elektrolisis.

Diagram 9Rajah 9

Which of the following half-equations represents the reaction that occurred at electrode Q? Antara persamaan setengah berikut, yang manakah mewakili tindak balas yang berlaku di elektrod Q?

A Na+ + e- → Na

B 2H+ + 2e- → H2

C 2Cl- → Cl2 + 2e-

D 4OH- → O2 + 2H2O + 4e-

37 Which of the following equations does not involve neutralisation?Antara persamaan kimia berikut yang manakah tidak melibatkan peneutralan?

A 2HCl (aq) + MgO(s) MgCl2(aq) + H2O(l)

B H2SO4(aq) + BaCl2(aq) BaSO4(s) + 2HCl(aq)

C HNO3(aq) + NaHCO3(s) NaNO3(aq) + CO2(g) + H2O(l)

D HCl(aq) + NH3(aq) NH4Cl(aq)


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38 Diagram 10 below shows the set-up of apparatus for electrolysis.Rajah 10 di bawah menunjukkan susunan radas untuk elektrolisis.

Substancebahan

Diagram 10Rajah 10

Which of the following substance could light up the bulb?Antara bahan berikut, yang manakah boleh menyalakan mentol?

A Potassium chloride solutionLarutan kalium klorida

B Glucose solutionLarutan glukosa

C Magnesium oxideMagnesium oksida

D Tetrachloromethane solutionLarutan tetraklorometana

39 Table 6 shows the degree of dissociation of four solutions of alkalis which have the same concentration.Jadual 6 di bawah menunjukkan darjah penceraian empat larutan alkali yang sama kepekatan.

SolutionLarutan

Degree of dissociationDarjah penceraian

W LowRendah

X MediumSederhana

Y HighTinggi

Z Very highSangat tinggi

Table 6Jadual 6

Which solution has the highest pH value?Larutan yang manakah mempunyai nilai pH yang paling tinggi?A W C Y

B X D Z


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Ce

Cell ASel A

Cell BSel B

4OH-→ 2H2O + O2 + 4e- Cu2+ + 2e-→ Cu

4OH-→ 2H2O + O2 + 4e- Cu → Cu2+ + 2e-

Cu2+ + 2e-→ Cu 4OH-→ 2H2O + O2 + 4e-

Cu → Cu2+ + 2e- 4OH-→ 2H2O + O2 + 4e-

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40 Diagram 11 shows two electrolytic cells which use two different type of electrodes, cell Auses carbon electrode while cell B uses copper electrode.Rajah 11 menunjukkan dua sel elektolisis yang mana menggunakan dua jenis elektrod yang berlainan. Sel A mengunakan elektrod karbon manakala sel B mengunakan elektrod kuprum.

Carbon Electrode Elektod karbon

Cell A

Copper(II) sulphate solution Larutan kuprum (II) sulfat Cell B

Copper Electrode Elektrod kuprum

Diagram 11Rajah 11

What are the half equation that represented the reaction at anode for both cells?Apakah setengah persamaan yang mewakili tindak balas di anod pada kedua-dua sel?

A

B

C

D

41 What is the mass of sodium hydroxide, NaOH which is required to prepare 250 cm3 sodium hydroxide solutions with a concentration of 100 gdm-3?[Relative atomic mass: Na = 23; O = 16; H = 1]Berapakah jisim natrium hidroksida, NaOH yang diperlukan untuk menyediakan 250 cm3

larutan natrium hidroksida dengan kepekatan 100 gdm-3? [ Jisim atom relatif Na = 23; O = 16; H = 1]

A 25g C 20g

B 35g D 40g


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4

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42 50.0 cm3 of 0.4 moldm-3 potassium hydroxide solution, KOH is titrated with sulphuric acid, H2SO4. What is the volume of 1.0 moldm-3 sulphuric acid which is needed to neutralise this potassium hydroxide solution?50.0 cm3 larutan kalium hidroksida, KOH 0.4 moldm-3 dititratkan dengan asid sulfurik, H2SO4. Berapakah isipadu asid sulfurik 1.0 moldm-3 yang diperlukan untuk meneutralkan larutan kalium hidroksida ini?

A 10.0 cm3 C 40.0 cm3

B 20.0 cm3 D 50.0 cm3

43 Which of the statements are true about a weak alkali?Antara pernyataan berikut, yang manakah benar tentang alkali lemah?

I It dissociates partially into hydroxide ions in waterIa terurai separa kepada ion hidroksida di dalam air

II Its pH value is higher than that of sodium hydroxideNilai pH nya adalah lebih tinggi daripada nilai pH natrium hidroksida

III It has low OH- ion concentrationIa mempunyai kepekatan ion hidroksida yang rendah

IV Most of its molecules remain unchanged in the waterKebanyakan molekulnya kekal tidak berubah di dalam air

A I and II only

B I, II and III only

C I, III and IV only

D II, III and IV only

44 The formula for a sulphate ion is SO42- and for a nitrate ion is NO3

- . If the formula of the sulphate salt of M is MSO4, what is the formula of nitrate salt of M?Formula bagi sulfat ion adalah SO 2- dan bagi nitrat ion adalah NO3

-. Jika formula bagigaram M sulfat adalah MSO4, apakah formula bagi garam M nitrat?

A MNO3

B M2NO3

C M(NO3)2

D M(NO3)3


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45 The following is chemical equation for a reaction.Berikut ialah persamaan kimia bagi satu tindak balas.

CaCO3 + 2HNO3 Ca(NO3)2 + H2O + CO2

Which of the following are the products?Antara berikut, yang manakah hasil tindak balas?

A H2O and CO2

B HNO3 and CO2

C CaCO3 and HNO3

D Ca(NO3)2, H2O and CO2

46 Which of the following salts can be prepared by using double decomposition method?Yang manakah di antara garam-garam berikut boleh disediakan dengan menggunakan kaedah penguraian ganda dua?

I Zinc chlorideZink klorida

II Barium sulphateBarium sulfat

III Sodium nitrateNatrium nitrat

IV Magnesium carbonateMagnesium karbonat

A I and III only

B II and IV only

C I, II and III only


47 Excess magnesium oxide is reacted with 25.0 cm3 of 2.0 moldm-3 nitric acid. Calculate the maximum mass of magnesium nitrate salt formed.[Relative atomic mass: N=14, 0=16, Mg=24]Magnesium oksida berlebihan bertindak balas dengan 25.0 cm3 asid nitrik berkepekatan2.0 moldm-3. Kira jisim bagi garam magnesium nitrat yang terbentuk. [Jisim atom relatif : N=14, 0=16, Mg=24]

A 7.40 g C 3.70 g

B 4.30 g D 1.48 g


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48 When heated, solid S gives off a gas that turns lime water milky. What is solid S?Apabila dipanaskan, pepejal S membebaskan gas yang menukarkan air kapur menjadi keruh. Apakah pepejal S?

I Sodium carbonateNatrium karbonat

II Calcium carbonateKalsium karbonat

III Potassium carbonateKalium karbonat

IV Magnesium carbonateMagnesium karbonat

A II only

B II and IV only

C I and IV only


49 The equation shows a reaction between silver nitrate solution and sodium chloride solution.Persamaan di bawah menunjukkan tindak balas di antara larutan argentum nitrat dan larutan natrium klorida

AgNO3 (aq) + NaCl(aq) → NaNO3 (aq) + AgCl(s)

Calculate the mass of silver chloride formed when 0.1 mol of silver nirate solution is added to 0.1 mol of sodium chloride solution?Hitungkan jisim argentum klorida yang terbentuk apabila 0.1 mol larutan argentum nitrat di tambah ke dalam 0.1 mol larutan natrium klorida?[ Relative atomic mass : Cl = 35.5; Ag = 108][ Jisim atom relatif : C =,35.5; Ag =108]

A 28.70 g

B 43.05g

C 21.50 g

D 14.35g


SULIT

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50 Which of the following catalyst is used in the Haber process?Yang manakah di antara mangkin berikut digunakan dalam proses Haber ?

A PlatinumPlatinum

B NickelNikel

C IronBesi

D Vanadium (V) oxideVanadium (V) oksida

END OF QUESTION PAPERKERTAS SOALAN TAMAT

4541/1© 2011 Hak Cipta Jabatan Pelajaran Melaka [Lihat sebelah

SULIT

Untuk kegunaan pemeriksaBahagian No. Markah

A

123456Jumlah

B78

C910Jumlah

Jumlah Markah

SULIT 4541/2

Nama

Kelas

SMK SIMANGGANG, SRI AMAN


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2 ½ jam Dua jam tiga puluh minit


1. Kertas soalan ini mengandungi tiga bahagian:Bahagian A, Bahagian B and Bahagian C.

2. Jawab semua soalan dalam Bahagian A. Tulis jawapan dalam Bahagian A dalam ruanganyang disediakan..

3. Jawab satu soalan dalam Bahagian B dan satu soalan dalan Bahagian C. Jawab soalan dalamBahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakanpersamaan kimia, rajah, jadual, graf dan kaedah yang bersesuaian untuk menerangkan jawapan anda.

4. Tunjukkan jalan kerja. Ia dapat membantu anda mendapat markah.

5. Rajah dalam soalan tidak dilukis mengikut skala.

6. Markah yang diperuntukan bagi setiap soalan ditunjukkan dalam kurungan.

7. Anda boleh menggunakan kalkulator saintifikyang tidak diprogramkan.

8. Serahkan kertas jawapan pada akhir waktu peperiksaan.


[Lihat sebelah

Z

SULIT 2

Section A [60 marks]

Answer all questionsJawab semua soalan

4541/2

1 Table 1 shows the proton number and nucleon number for atoms P, Q , R and S.Jadual 1 menunjukkan nombor proton dan nombor nukleon bagi atom P, Q, R dan S.

Atom Proton number Nucleon NumberP 16 32Q 17 35R 17 37S 18 40

Table 1Jadual 1

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

...............................................................................……………................…................

(ii) What is the number of neutrons in atom P?Apakah bilangan neutron dalam atom P?

[ 1 mark ]

.................................................................................................………………….....….

(b) (i) Which atoms are isotopes? Explain your answer.Atom-atom yang manakah adalah isotop? Terangkan jawapan anda.

[ 1 mark ]

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

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

(ii) Write the isotopes in the form of A X .A

[ 2 marks ]

Tuliskan isotop-isotop dalam bentuk Z X.

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

(c) (i) Write the electron arrangement for atom R.Tuliskan susunan elektron bagi atom R.

[ 2 marks ]

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

[ 1 mark ]

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(ii) Draw the electron arrangement of atom R.Lukiskan susunan elektron bagi atom R.

(d) S is an inert gas which chemically unreactiveS merupakan gas lengai yang tidak reaktif secara kimia

Explain the above statement.Terangkan kenyataan di atas.

[ 2 marks ]

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

[ 1 mark ]

2 Diagram 2 shows the apparatus set-up used in an experiment to determine the empirical formula for an oxide of lead.Rajah 2 menunjukkan susunan radas yang digunakan dalam eksperimen bagi menentukan formula empirik bagi oksida plumbum.

oxide of leadoksida plumbum

dry hydrogenhidrogen kering

Diagram 2Rajah 2

The following data was obtained based on the experiment :Data berikut diperolehi berdasarkan suatu ekperimen:

Mass of an oxide of lead = 4.78 gJisim oksida plumbumMass of lead = 4.14 gJisim plumbum


SULIT 4 4541/2

(a) What is meant by empirical formula ?Apakah yang dimaksudkan dengan formula empirik ?

………………………….………………………………………………………....................

…………………………………………………………………………………………….....

(b) Name one substance that can be used to dry the hydrogen gas.Namakan bahan yang boleh digunakan untuk mengeringkan gas hidrogen.

[ 1 mark ]

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

[ 1 mark] (c) Why does the hydrogen gas need to be passed through the combustion tube for a few

minutes before heating ?Mengapakah gas hidrogen dialirkan ke dalam tiub pembakaran beberapa minit sebelum pemanasan ?

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

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

(d) How to ensure the reaction is complete ?Bagaimana untuk memastikan tindak balas adalah lengkap?

[ 1 mark]

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

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

(e) Determine the empirical formula for oxide of lead ?Tentukan formula empirik bagi oksida plumbum ? [Relative atomic mass for O = 16 and Pb = 207] [Jisim atom relatif bagi O = 16 dan Pb = 207]

[ 2 marks]

[ 4 marks]

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SULIT 5 4541/2

(f) Why does the empirical formula of magnesium oxide cannot be determined using the above method ?Mengapa formula empirik magnesium oksida tidak boleh ditentukan menggunakan kaedah di atas ?

................................................................................................................................................. [

1 mark]

3 Diagram 3 shows the positions of 6 elements represented by the letters A, B, C, D, E, F in thePeriodic Table of Elements.Rajah 3 menunjukkan kedudukan 6 unsur yang diwakili oleh huruf A,B,C,D,E, F dalam JadualBerkala Unsur.

A B C D EF

Diagram 3Rajah 3

Using these letters, answer the following questions.Menggunakan huruf-huruf tersebut, jawab soalan-soalan berikut.(a) State the element which exists as a diatomic molecule under room condition.

Nyatakan unsur yang wujud sebagai molekul dwiatom pada keadaan bilik.

……………………………………………………………………………………………….

(b) State one special characteristic of element F .Nyatakan satu ciri istimewa bagi unsur F.

[ 1 mark ]

…………………………………………………………………………………………….....

(c) (i) Arrange atoms A, B, C, D and E in decreasing order of atomic size.Susun atom A, B ,C , D dan E mengikut tertib pengurangan saiz atom.

[ 1 mark ]

………………………………………………………………………………………...

(ii) Explain your answer in (c)(i).Huraikan jawapan anda dalam (c)(i).

[ 1 mark ]

…………………………………………………………………………………….…..

………………………………………………………………………………………...

[ 3 marks ]


SULIT 6 4541/2

(d) Write the chemical formula for the ion formed by element D.Tuliskan formula kimia bagi ion yang terbentuk dari unsur D.

………………………………………………………………………………………….........

(e) Write the chemical equation for the reaction between the oxide of A and water.Tuliskan persamaan kimia untuk tindakbalas antara oksida A dan air.

[ 1 mark ]

…………………………………………………………………………..…………………... [

3 marks]

4 Table 4 below shows the electron arrangement of 6 elements T,U,V,W, X and Y.Jadual 4 menunjukkan susunan elektron bagi unsur-unsur T,U,V,W, X dan Y

Elements Proton number Electron arrangement

T 6 2.4U 17 2.8.7V 11 2.8.1W 12 2.8.2X 2.8.8Y 19

Table 4Jadual 4

(a) Based on Table 4, answer the following questions.Berdasarkan Jadual 4, jawab soalan-soalan berikut.(i) What is the proton number of element X ?

Berapakan nombor proton bagi unsur X?

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

(ii) What is the electron arrangement for ion Y?Apakah susunan elektron bagi ion Y?

[ 1 mark ]

............................................................................................................………………...

(b) Element T reacts with element U to form a compoundUnsur T bertindakbalas dengan unsur U untuk membentuk satu sebatian(i) Give the molecular formula of compound formed.

Berikan formula molekul bagi sebatian yang terbentuk.

[ 1 mark ]

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

[ 1 mark ]

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(ii) State the type of bonding in the compound formed in (b)(i).Nyatakan jenis ikatan yang terbentuk bagi sebatian yang terbentuk dalam (b)(i).

………………………………………………………………………………………...

(iii) Give two physical properties of the compound formed.Berikan dua sifat fizikal sebatian yang terbentuk.

[ 1 mark ]

………………………………………………………………………………………...

………………………………………………………………………………………...

(iv) Illustrate the electron arrangement of the compound formed in (b)(i)Lukis susunan elektron bagi sebatian yang terbentuk dalam (b)(i)

[ 2 marks ]

[ 2 marks ] (c) Element W reacts with element U to form a compound. Write the chemical formula of the

compound formed by U and W.Unsur W bertindakbalas dengan unsur U membentuk satu sebatian. Tuliskan formula kimia bagi sebatian yang terbentuk oleh U dan W.

……………………………………………………………………………………….............

(d) State an element that can form a cation.Nyatakan satu unsur yang boleh membentuk kation.

[ 1 mark ]

………………………………………………………………………………………...

[ 1 mark ]


SULIT 8 4541/2

5 Table 5.1 shows incomplete observation for two sets of electrolysis of sodium chloride solution with different concentration using carbon electrode.Jadual 5.1 menunjukkan pemerhatian yang tidak lengkap bagi dua set elektrolisis larutan natrium klorida dengan kepekatan yang berbeza menggunakan elektrod karbon.

Set

Concentration ofsodium chloride

solution(mol dm-3)

Kepekatan larutan natrium klorida

(mol dm-3)

ObservationPemerhatian

Set 1 0.002

Anode Bubbles of colourless gas is releasedGas tanpa warna dibebaskan

Cathode Bubbles of colourless gas is releasedGas tanpa warna dibebaskan

Set 2 1.0Anode ........................................................................

Cathode ........................................................................

(a) (i) Complete Table 5.1Lengkapkan Jadual 5.1

Table 5.1Jadual 5.1

(ii) Describe a chemical test to identify the product formed at anode in set 2.[ 2 marks ]

Huraikan satu ujian kimia untuk mengenalpasti hasil yang terbentuk di anod pada set 2.

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

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

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

(b) Based on experiment in set 1:Berdasarkan eksperimen dalam set 1:(i) Name the colourless gas formed at the cathode.

Namakan gas tanpa warna yang terbentuk di katod.

[ 2 marks ]

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

[ 1 mark ]

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SULIT 9

(ii) Write a half equation for the formation of gas at the cathode.Tulis setengah persamaan untuk pembentukan gas di katod.

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

[ 1 mark ] (c) In another experiment, a student using apparatus and materials in Table 5.2 to produce an

electrical energy from chemical energy.Dalam satu eksperimen lain, seorang pelajar menggunakan radas dan bahan dalamJadual 5.2 untuk menghasilkan tenaga elektrik dari tenaga kimia.

ApparatusRadas

Beaker, connecting wire, galvanometerBikar, wayar penyambung, galvanometer

MaterialsBahan

Zinc , copper strip, copper (II) sulphate solutionZink, kepingan kuprum, larutan kuprum (II) sulfat

Table 5.2Jadual 5.2

(i) Diagram below shows incomplete apparatus set-up used in (c).Rajah di bawah menunjukkan susunan radas tidak lengkap yang digunakan pada (c).

Complete the diagram below.Lengkapkan rajah di bawah.

(ii) State the direction of electron flow in this experiment.Nyatakan arah pergerakan elektron dalam eksperimen ini.

[ 2 marks ]

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

[ 1 mark ]


SULIT 10 4541/2

(iii) State the observation in the copper (II) sulphate solution.Nyatakan pemerhatian pada larutan kuprum(II) sulfat.

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

[ 1 mark ]

6 An experiment is carried out to find the end point of acid-base titration. 25.0 cm3 of 1.0 moldm-3

sodium hydroxide solution reacts with hydrochloric acid. Table 6 shows the results of the experiment.Satu eksperimen dijalankan untuk menentukan takat akhir peneutralan antara asid dan alkali.25.0 cm3 bagi 1.0 moldm-3 larutan natrium hidroksida bertindak balas dengan asid hidroklorik. Jadual 6 menunjukkan keputusan bagi eksperimen tersebut.

Volume of hydrochloric acid First reading Secondreading

Thirdreading

Final burette reading/ cm3 21.00 41.60 25.80Initial burette reading/ cm3 0.00 21.00 5.00Volume of hydrochloric acid used/ cm3

Table 6Jadual 6

(a) Draw the set-up of apparatus that is used in the experiment.Lukiskan gambar rajah susunan alat radas yang digunakan di dalam eksperimen ini.

(b) (i) State the indicator solution that is suitable to be used in the experiment.[ 2 marks ]

Nyatakan larutan penunjuk yang sesuai untuk digunakan di dalam eksperimen ini.

………………………………………………………………………………………...

[ 1 mark ]

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SULIT 11 4541/2

(ii) Based on the indicator solution mentioned in (b)(i), state the colour change at the end point.Berdasarkan larutan penunjuk yang dinyatakan di dalam (b)(i), nyatakan perubahan warna pada takat akhir.

………………………………………………………………………………………...

(c) (i) Complete Table 6 to find the volume of hydrochloric acid used.Lengkapkan Jadual 6 untuk menentukan isipadu asid yang digunakan.

(ii) Calculate the average volume of hydrochloric acid used.Kira isipadu purata bagi asid hidroklorik yang digunakan.

[ 1 mark ]

[ 1 mark ]

(d) Write the chemical equation for this experiment.Tulis persamaan kimia bagi eksperimen ini.

[ 1 mark ]

……………………………………………………………………………………………….

(e) Find the concentration of hydrochloric acid used.Tentukan kepekatan bagi asid hidroklorik yang digunakan.

[ 1 mark ]

[ 2 marks ] (f) Hydrochloric acid is classified as a strong and monoprotic acid. State another example of

monoprotic acid.Asid hidroklorik dikelaskan sebagai asid kuat dan asid monoprotik. Nyatakan contoh asid monoprotik yang lain.

………………………………………………………………………………………....……. [

1 mark ]

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SULIT

SULIT 12

Section B[20 marks]

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

4541/2

7 (a) Diagram 7 shows the electron arrangement of a molecule PQ2.Rajah 7 menunjukkan susunan elektron bagi satu molekul PQ2.

Diagram 7Rajah 7

Based on Diagram 7, write the electron arrangement for atoms of element P and elementQ.Explain the position of element Q in the Periodic Table.Berdasarkan Rajah 7, tulis susunan elektron bagi atom unsur P dan unsur Q. Terangkan kedudukan unsur Q dalam Jadual Berkala

(b) Table 7 shows the electron arrangement for atoms W, X and Y.Jadual 7 menunjukkan susunan elektron bagi atom W,X dan Y.

[6 marks]

Element Electron arrangementW 2.4X 2.8.7Y 2.8.8.2

Table 7Jadual 7

Using the information in Table 7, explain how two compounds can be formed from these elements based on their electron arrangements.The two compounds should have different bond types.Menggunakan maklumat dalam Jadual 7, terangkan bagaimana dua sebatian dapat terbentuk dari unsur-unsur ini berdasarkan susunan elektron.Dua sebatian ini mestilah berbeza jenis ikatan.

(c) Compare the physical properties for both chemical compound formed in (b).[10 marks]

Bandingkan sifat-sifat fizikal bagi kedua-dua sebatian yang terbentuk dalam (b).[ 4 marks ]

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8 Table 8 shows the information on two type of acids.Jadual 8 menunjukkan maklumat tentang dua jenis asid.

AcidAsid

Concentration (moldm-3)Kepekatan (moldm-3)

pH valueNilai pH

Hydrochloric acid, HClAsid hidroklorik, HCl 0.1 1

Ethanoic acid, CH3COOHAsid etanoik, CH3COOH 0.1 4

Table 8Jadual 8

(a) One of the acids is a strong acid, while the other is a weak acid.Satu daripada asid tersebut ialah asid kuat dan satu lagi ialah asid lemah.(i) What are the definition for a strong acid and a weak acid?

Apakah takrifan bagi asid kuat dan asid lemah?

(ii) Identify the strong acid and weak acid.Kenalpasti asid kuat dan asid lemah.

(iii) Explain why the pH values of the two acids are different.Jelaskan tentang perbezaan nilai pH kedua-dua asid.

(b) (i) What is the definition of molarity?State the formula and the unit of molarity.Apakah takrifan kemolaran?Nyatakan formula dan unit bagi kemolaran.

[ 2 marks ]

[ 2 marks ]

[ 4 marks ]

[ 3 marks ](ii) Explain how you would prepare 100.0 cm3 of 0.05 moldm-3 of hydrochloric acid

from 0.50 moldm-3 of hydrochloric acid.Terangkan bagaimana anda menyediakan 100.0 cm3, 0.05 moldm-3 asid hidroklorik daripada 0.50 moldm-3 asid hidroklorik.

[ 5 marks ] (iii) Calculate the volume of 40.0 gdm-3 of sodium hydroxide solution required to

neutralise the solution in b (ii).[Relative atomic mass: H=1; O=16; Na=23]Kira isipadu bagi 40.0 gdm-3 larutan natrium hidroksida yang diperlukan untuk meneutralkan larutan dalam b(ii).[Jisim atom relatif: H=1; O=16; Na=23]

[ 4 marks ]


SULIT 14

Section C[20 marks]

Answer any one question from this section

Jawab mana-mana satu soalan dari bahagian ini

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9 (a) State 3 factors that affects the selective discharged of ions during electrolysis .Nyatakan 3 faktor yang mempengaruhi pemilihan ion untuk nyahcas semasa elektrolisis.

[ 3 marks ] (b) Diagram 9 shows the set-up of apparatus of two experiments to investigate the electrolysis

process by using different electrodes.Rajah 9 menunjukkan susunan radas bagi dua eksperimen untuk mengkaji proses elektrolisis dengan menggunakan elektrod-elektrod yang berlainan.

ExperimentEksperimen Apparatus set-up

Susunan radas

I

A

Copper electrodesElektrod kuprum

Copper(II) sulphate solutionLarutan kuprum(II) sulfat

IICarbon electrodesElektrod karbon

Copper(II) sulphate solutionLarutan kuprum(II) sulfat

A

Diagram 9Rajah 9

Compare the observation and product formed at the anode for both experimentsBandingkan pemerhatian dan hasil yang terbentuk di anod bagi kedua-dua eksperimen.

Write the half equation at the anode for both experiments.Tuliskan setengah persamaan di anod bagi kedua-dua eksperimen.

[ 6 marks ]

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(c) Table 9 shows the voltage of chemical cell using metals A, B and C as the electrode.Jadual 9 menunjukkan nilai voltan bagi sel kimia menggunakan logam A, B dan Csebagai elektrod.

Pairs of metalPasangan logam

Voltage (V)Nilai voltan (V)

Positive terminalTerminal positif

B / C 0.1 CA / C 0.8 C

Table 9Jadual 9

Based on the information given,Berdasarkan kepada maklumat yang diberikan,

(i) state the voltage of a chemical cell using metal A and B as the electrodes.nyatakan nilai voltan yang akan dihasilkan oleh sel kimia yang menggunakan logam A dan B sebagai elektrod.

(ii) state the negative terminal in (c)(i) and explain your answer.nyatakan terminal negatif pada (c)(i) dan terangkan jawapan anda.

[ 3 marks ] (d) A student has an inattractive ring and it is easy to corrode. To solve the problem, he uses

an electrolysis process in a laboratory.Seorang pelajar mempunyai sebentuk cincin yang tidak menarik dan mudah berkarat. Untuk mengatasi masalah ini, dia menggunakan proses elektrolisis di dalam makmal.

A student may used the apparatus and chemical as follow:Pelajar boleh menggunakan radas dan bahan kimia seperti berikut:

Beaker, connecting wire and crocodile clip, battery, silver metal, silver nitrate solution,Bikar, wayar penyambung bersama klip buaya, bateri, kepingan argentum , larutan argentum nitrat,

Describe an experiment on how to solve these problem. In your description include a diagram to show the set-up of apparatus.Huraikan satu eksperimen bagaimana untuk mengatasi masalah ini. Dalam penerangan anda sertakan gambarajah untuk menunjukkan susunan radas.

[ 8 marks ]


SULIT 16 4541/2

10 (a) (i) What is meant by ‘salt’ ?Apakah yang dimaksudkan dengan ‘garam’?

(ii) Name salt derived from Nitric acid Hydrochloric acid

Namakan garam yang dihasilkan dariAsid nitrikAsid hidroklorik

[ 2 marks ]

[ 2 marks ](b) The following are three examples of sulphate salts that can be prepared in the

laboratory.Berikut adalah tiga contoh garam sulfat yang boleh disediakan di dalam makmal.

• Potassium sulphate, K2SO4Kalium sulfat, K2SO4

• Lead (II) sulphate, PbSO4Plumbum (II) sulfat, PbSO4

• Zinc sulphate, ZnSO4Zink sulfat, ZnSO4

(i) From these examples, identify the soluble and insoluble salts.Daripada contoh-contoh ini, kenal pasti garam terlarutkan dan garam tak larut.

[ 2 marks ](ii) State the reactant for the preparation of the insoluble salt in 10(b)(i)

Nyatakan bahan tindak balas bagi penyediaan garam tak larut di 10(b)(i).[ 2 marks ]

(c) With the aid of a labelled diagram, describe the procedure of experiment to preparethe named insoluble salts by using the reactant in 10(b)(ii). Your answer should include the

• list of materials and apparatus• chemical equation• ionic equation for the reaction.

Dengan bantuan gambarajah berlabel, huraikan langkah-langkah eksperimen untuk menyediakan garam tidak larut yang dinamakan dengan menggunakan bahantindak balas dalam 10(b)(ii).Jawapan anda mestilah mengandungi

• senarai bahan dan alat radas• persamaan kimia• persamaan ion bagi tindak balas.

[12 marks]


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SULIT 17 4541/2

INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON

1. This question paper consists of three sections: Section A, Section B and Section C.Kertas soalan ini mengandungi tiga bahagian: Bahagian A, Bahagian B dan Bahagian C.

2. Answer all questions in Section A. Write your answers for Section A in the spaces provided in the question paper.Jawab semua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yang disediakan dalam kertas soalan.

3. Answer one question from Section B and one question from Section C.Write your answers for Section B and Section C on the `writing paper’ provided by the invigilators.Answer questions in Section B and Section C in detail.You may use equations, diagrams, tables, graphs and other suitable methods to explain your answer.Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Tuliskan jawapan bagi Bahagian B dan Bahagian C pada kertas tulis yang disediakan. Jawab Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

4. Show your working. It may help you to get marks.Tunjukkan kerja mengira.Ini membantu anda mendapatkan markah.

5. If you wish to change your answer, neatly cross out the answer that you have done. Then write down the new answer.Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu.

6. The diagrams in the questions are not drawn to scale unless stated.Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan.

7. Marks allocated for each question or part question are shown in brackets.Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan.

8. The time suggested to answer Section A is 90 minutes, Section B is 30 minutes and SectionC is 30 minutes.Masa yang dicadangkan untuk menjawab Bahagian A ialah 90 minit, Bahagian B ialah 30 minit danBahagian C ialah 30 minit.

9. You may use a non-programmable scientific calculator.Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan.

10. Hand in your answer sheets at the end of the examination.Serahkan semua kertas jawapan anda di akhir peperiksaan.


1

HHydrogen

1

THE PERIODIC TABLE OF THE ELEMENTS

Proton number

10

2

HeHelium

4

3

LiLithium

7

11

NaSodium

23

4

BeBeryllium

912

Mg Magnesiu

m24

NeNeon

20

Symbol

Name of element

Relative atomic mass

5

BBoron

1113

Al Aluminiu

m27

6

CCarbon

12

14

SiSilicon

28

7

NNitrogen

1415

P Phosphor

us31

8

OOxygen

16

16

SSulphur

32

9

FFluorine

19

17

ClChlorine

35

10

NeNeon

20

18

ArArgon

40

19

KPotassium

39

37

RbRubidium

86

55

CsCaesium

133

87

FrFrancium

223

20

CaCalcium

40

38

SrStrontium

88

56

BaBarium

137

88

RaRadium

226

21

ScScandium

45

39

YYttrium

89

57

La Lanthanu

m139

89

AcActinium

227

22

TiTitanium

48

40

ZrZirconium

91

72

HfHafnium

179

104

Unq Unnil

quadium257

23

V Vanadiu

m51

41

NbNiobium

93

73

TaTantalum

181

105

Unp Unnil

pentium260

24

CrChromium

52

42

Mo Molybden

um96

74

WTungsten

184

106

UnhUnnil hex

ium263

25

Mn Manganes

e5543

Tc Technetiu

m98

75

ReRhenium

186

107

UnsUnnilsepti

um262

26

FeIron56

44

Ru Rutheniu

m101

76

OsOsmium

190

108

UnoUnnilocti

um265

27

CoCobalt

59

45

RhRhodium

103

77

IrIridium

192

109

UneUnnilenni

um266

28

NiNickel

59

46

PdPalladium

106

78

PtPlatinum

195

29

CuCopper

64

47

AgSilver108

79

AuGold197

30

ZnZinc65

48

CdCadmium

112

80

HgMercury

201

31

GaGallium

70

49

InIndium

115

81

TlThallium

204

32

Ge Germaniu

m73

50

SnTin119

82

PbLead207

33

AsArsenic

75

51

SbAntimony

122

83

BiBismuth

209

34

SeSelenium

79

52

TeTellurium

128

84

PoPolonium

210

35

BrBromine

80

53

IIodine

127

85

AtAstatine

210

36

KrKrypton

84

54

XeXenon

131

86

RnRadon

222

58

CeCerium

140

59

Pr Praseo dymium

141

60

NdNeodymiu

m144

61

PmPromethiu

m147

62

SmSamarium

150

63

EuEuropium

152

64

GdGadoliniu

m157

65

TbTerbium

167

66

DyDyprosiu

m163

67

HoHolmium

165

68

ErErbium

167

69

TmThulium

169

70

YbYtterbium

173

71

LuLutetium

175

90

ThThorium

232

91

Pa Protactini

um231

92

UUranium

238

93

Np Neptuniu

m237

94

PuPlutonium

244

95

Am Americiu

m243

96

CmCurium

247

97

BkBerkelium

247

98

Cf Californiu

m249

99

Es Einsteiniu

m254

100

FmFermium

253

101

Md Mendelev

ium256

102

NoNobelium

254

103

Lr Lawrenci

um257

Reference: Chang, Raymond (1991). Chemistry. McGraw Hill

4541/1, 4541/2CHEMISTRY 1, CHEMISTRY 2Oktober2012

SMK SIMANGGANG

SRI AMAN

PEPERIKSAAN AKHIR TAHUN

TINGKATAN 4

2012

CHEMISTRY 1CHEMISTRY 2

PERATURAN PEMARKAHAN

Skema Pemarkahan ini mengandungi 10 halaman bercetak

2

MARKING SCHEME OF CHEMISTRY PAPER 1

1 C 11 D 21 D 31 C 41 A

2 D 12 A 22 D 32 B 42 A

3 C 13 D 23 C 33 C 43 C

4 A 14 A 24 B 34 B 44 C

5 A 15 B 25 C 35 A 45 D

6 D 16 B 26 A 36 D 46 B

7 B 17 A 27 B 37 B 47 C

8 A 18 C 28 B 38 A 48 B

9 C 19 A 29 C 39 D 49 D

10 D 20 B 30 A 40 B 50 C

3

MARKING SCHEME OF CHEMISTRY PAPER 2

Scheme Marks Sub-total

1. (a) (i) The number of protons in the nucleus of an atom 1

2(ii) 16 1

(b) (i) Q and R,

Q and R have same number of protons but different number of neutrons/ different nucleon number

1

1

4

(ii)35

Q17

37 Q17

1

1

(c) (i) 2.8.7 1

3

1

Total10 m

(ii)

R

Number of shells(3)

Number of electrons

1

1

(d) Because S has 8 valence electrons // has achieved[stable] o c t e t electron arrangement.

1

Pb OMass (g) 4.14 0.64No of mole n=4.14/207

=0.02n= 0.64/16=0.04

Simplestratio

1 2

Empiricalformula

PbO2

4

2 a Empirical formula is a chemical formula that showsthe simplest ratio of the number of atom for each element in the compound

1 1

b Anhydrous Calcium chloride // concentratedsulphuric acid

1 1

c To ensure that the combustion tube has been filledwith hydrogen gas 1 1

d The process of heating, cooling and weighing arerepeateduntil a constant mass of substance and its container is obtained

1

12

e

1

1

1

1 4

f Because Mg is at higher position than H in theelectrochemical series. 1 1

Total10m

3 a D 1 1b - has more than one oxidation number //

- can act as catalyst//- can formed complex ion- can formed coloured ion

[ any one ]1 1

c (i) A,B,C,D,E(ii) - Across the period, the proton number of

each atom increase- Nuclei charge in the nucleus increase- Force of attraction between nucleus and outermost shell become stronger // outermost shell are pulled closer to the nucleus

1

11

1 4

d D-1 1 1e A2O + H2O 2AOH

5

- formula of reactant- formula of product- balance equation

111 3

Total10 m

4 a (i) 18 1 2(ii) 2.8.8 1

b (i) TU4 1

6

(ii) Covalent bond 1(iii) - low melting and boiling point//

- cannot conduct electricity in any state //- insoluble in water // soluble in organic

solvent.[any two of the above]

11

(iv) - correct number of electron in each shell- four atom U combine with one atom T

[ the atom is labelled]

1

1c WU2 1 1d V // W // Y

[ any one ]1 1

Total10m

5 a (i) Anode : Greenish yellow gas is releasedCathode : Colourless gas is released

11

4(ii) - Insert a damp blue litmus at [the anode]

- Blue litmus paper turn red and [bleached]11

b (i) Hydrogen 12(ii) 2H+ + 2e → H2 1

c (i) Functional diagramLabelled diagram – zinc strip, copper strip ,

copper(II) sulphate solution

1

1

4(ii) Zinc to copper through connecting wire 1(iii) Blue turn colourless 1

Total10m

6

6 a - Functional diagram with correct shaded solution inconical flask and burette

- label of sodium hydroxide solution in conical flask and hydrochloric acid in the burette

1

12

b (i) - Phenolphtalein solution//[ accept any suitable indicator solution ]

12

(ii) pink to colourless 1c (i) 21.00, 20.60, 20.80 1 1

(iii) =21.00 + 20.60 + 20.80 //3

= 20.80 cm3 1 1

d NaOH + HCl NaOH + H2O- correct formula and reactant

1 1

e MaVa = naMbVb nb

Ma x 20.80 = 11.0 x 25.0 1Concentration of HCl, Ma = 1.20 moldm-3

[ accept another suitable method ]

1

1 2

f Nitric acid 1 1Total10m

7 a - The electron arrangement of P atom is 2.4- and Q atom is 2.6.- Q atom is in group 16 because it- has 6 valence electron and- it is in period 2 because- it has 2 shells occupied with electron.

111111

6

b I on i c bo n d :- X atom has 7 valence electron and Y atom has 2

valence electron.- These electron arrangement are unstable.- To achieve a stable electron arrangement, Y atom donate 2 valence electron and form Y2+ ions

- 2 atom X receive 1 electron each and form X- ions.- Y2+ ion and X- ions are attract to each other- to form an ionic compound with formula YX2

11

1111

7

C ov a l e nt bond :- W atom has 4 valence electron and X atom has 7 valence electron.

- To achieve a stable electron arrangement, one Watom share 4 valence electron with 4 atom X.

- They will form 4 single covalent bond- with a formula WX4

1

111

10

c Ionic compound Covalent compound1. soluble in water Insoluble in

Water 12. insoluble in organicsolvent

Soluble inorganic solvent 1

3. conduct electricity inmolten and aqueous state

Cannot conductelectricity in any state 1

4. high melting and boilingpoint

Low meltingand boiling point 1 4

Total = 20m

8 a (i). - strong acid is an acid which ionises /dissociatescompletely in water to produce a high concentration of hydrogen ions, H+

- weak acid is an acid which ionises / dissociates partially in water to produce a low concentration of hydrogen ions, H+

(ii). Strong acid - hydrochloric acid / HClWeak acid - ethanoic acid / CH3COOH

(iii). - hydrochloric acid ionises completely in water and produced high concentration of hydrogen ions

- the high concentration of hydrogen ions causesthe pH value to become lower

- ethanoic acid ionises partially in water and produced lower concentration of hydrogen ions.

- the lower concentration of hydrogen ionscauses the pH value to become higher

1

1

11

1

1

1

1

2

2

4

I IIAnode becomes thinner Gas bubbles are releasedCopper (II) ion OxygenCu Cu2+ + 2e 4OH- O2 + 2H2O + 4e

8

b (i). Molarity is the number of moles solute present in1 dm3 solution.

- Molarity = no of m o l e s of so l u t e ( m o l ) Volume of solution (dm3)

- Unit , moldm-3

(ii). - Calculation: M2 = 100 X 0.050.5

= 10 cm3

- Using pipette, 10.0 cm3 of 0.50 moldm-3 of hydrochloric acid is transferred to a 100 ml volumetric flask.

- Distilled water is then added to the acid in the volumetric flask until near the calibration mark

- Add distilled water dropwise to the volumetric flask until water level exactly reach its calibration mark

- Stopper the flask and shake well the solution by up side down the flask to ensure thorough mixing

(iii). - Molarity of NaOH = 40 g d m - 3 23 + 16 + 1

= 1.0 moldm-3

NaOH + HCl NaCl + H2O

Ma Va = naMbVb nb

- 0.05 X 100.0 = 11.0 X Vb 1

- Volume of NaOH, Vb = 5.0 cm3

[ Accept another suitable method ]

1

1

1

1

1

1

1

1

1

1

1

1

3

5

4

Total20m

9 (a) i. concentration of ionii. type of electrodeiii. position of ion in electrochemical series

111 3

(b)

1+11+11+1 6

9

(c) (i) 0.8 - 0.1 = 0.7V // 0.7V 1

3(ii) - Electrode A,- A is more electropositive than B

11

(d) Procedure of experiment:

i. [50-200 cm3] dilute silver nitrate solution is poured into a beaker.

ii. An iron ring is cleaned using sand paper.iii. Iron ring is connected to negative terminal of

battery // silver metal is connected to positive terminal of battery

iv. Iron ring and silver metal is immersed into the silver nitrate solution

v. The circuit is completed using connecting wire vi . Using small current/turn the ring steadilyvii. Diagram:

- Functional diagram contain two different metals as electrode ( no need with correct electrode) and the solution is shaded correctly.

- iron spoon as cathode, silver as anode and silver nitrate solution are labelled.

11

1

111

1

18

Total = 20m

10 a

b

c

(i). - An ionic compound formed when the- hydrogen ion in an acid is replaced by the metal ion or ammonium ion

(ii) ● sodium nitrate / potassium nitrate etc● silver chloride / sodium chloride etc

(i) Soluble salts : potassium sulphate and zinc sulphate

Insoluble salts : lead (II) sulphate

(ii) Lead (II) nitrate and sodium sulphate. [ any suitable and correct answer ]

- A l ter n a t i v e D i ag r a m : (i) Process of mixing the solution, contains:

• Diagram shows the mixture of lead (II) nitrate in and sodium sulphate in a beaker with glass rod

• shade the solution / mixture correctly

1

1

11

11

1+1

11

4

4

10

OR

(ii) Diagram shows the filtration process, contains:● Labelled;

Lead (II) sulphate in filter paper (as residue), Sodium nitrate solution in the beaker (as filtrate and shaded )

● The set of apparatus contain filter paper,filter funnel ( clamped at retort stand) and beaker.

- Materials and apparatus:[0.1 – 1.0moldm-3 ] sodium sulphate solution, [0.1 – 1.0 moldm-3] lead (II) nitrate solution,50 ml beaker, 50.0 ml measuring cylinder, rod, filter paper, filter funnel, conical flask.

- Procedure:i. [ 50.0 cm3 of 0.5 moldm-3] of sodium sulphate

solution is measured using 50.0 ml measuring cylinder and pour into a beaker, A.

ii. [50.0 cm3 of 0.5 moldm-3] of lead (II ) nitrate solution is measured using 50.0 ml measuring cylinder and pour into another beaker, B.

iii. Solution in beaker A is poured into the solution in beaker B.

iv. Stir with glass rod, precipitate formed.v. The precipitate is filtered into a conical flask

using filter paper and filter funnel and rinsed the residue with distilled water

vi. Dry the residue by pressing between two filter papers.

- Chemical equation:Na2SO4 + Pb(NO3)2 PbSO4 + 2NaNO3

- Correct reactant and product- Balance equation

- Ionic equation:2-Pb2+ + SO4 PbSO4

OR

1

1

1

1

1

11

1

1

11

1

12

Total20

END OF MARK SCHEME

Untuk kegunaan pemeriksa sahaja

Soalan MarkahPenuh

Markahdiperolehi

1 33

2 17

Jumlah 50

SULIT 4541/3

Nama

KelasSMK SIMANGGANG,SRI AMAN


4541/3

1 ½ jam Satu jam tiga puluh minit


1. Tuliskan nama dan tingkatan pada ruang yang disediakan.

2. Kertas soalan ini adalah dalam dwi bahasa.

3. Calon hendaklah membaca arahan pada halaman 2 .


[Lihat sebelah

2

INFORMATION FOR CANDIDATES

1. This question paper consists of two questions. Answer all questions.Kertas soalan ini mengandungi dua soalan. Jawab semua soalan.

2. Write your answer for Question 1 in the spaces provided in the question paper.Tulis jawapan anda bagi Soalan 1 pada ruang yang disediakan dalam kertas soalan ini.

3. Write your answers for Question 2 on the writing paper provided by the invigilators.Tulis jawapan anda bagi Soalan 2 pada kertas tulis yang disediakan.

4. You may use equations, diagrams, tables, graph and other suitable methods to explain your answer.Anda boleh menggunakan persamaan , rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

5. Show your working, it may help you to get marks.Tunjukkan kerja mengira, ini membantu anda mendapatkan markah.

6. If you wish to change your answer, cross out the answer that you have done. Then write down the new answer.Jika anda hendak menukar jawapan, batalkan jawapan yang telah dibuat. Kemudian tulis jawapan yang baru.

7. Marks allocated for each question or part question are shown in brackets.Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan.

8. The time suggested to answer each of the questions is 45 minutes.Masa yang dicadangkan untuk menjawab setiap soalan ialah 45 minit.

9. You may use a non-programmable scientific calculator.Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

10. Hand in your answer sheets at the end of the examination.Serahkan kertas jawapan anda di akhir peperiksaan.

4541/3

SULIT 3

Answer all questionJawab semua soalan

4541/3

1 A student carried out three experiments to study the reaction of alkali metal with water.Seorang pelajar menjalankan tiga eksperimen untuk mengkaji tindak balas di antara logamalkali dengan air.

For Examiner’sUse

Set up of apparatusSusunan alat radas

Observation of the alkali metalPemerhatian terhadap logam alkali

LithiumLitium

WaterAir

Set ISodiumNatrium

WaterAir

Set II

PotassiumKalium

WaterAir

Set III

Diagram 1.1Rajah 1.1

(a) Look at Diagram 1.1. Complete Diagram 1.1 by stating the observations for the reaction of group 1 metals with water based on the movement on the water surface , flame and the sound produce.Perhatikan Rajah 1.1. Lengkapkan Rajah 1.1 dengan menyatakan pemerhatian bagi tindak balas di antara logam kumpulan 1 dengan air berdasarkan kepada pergerakannya di atas permukaan air, nyalaan, dan bunyi yang terhasil.

1(a)

[3 marks] 3


Name of variablesNama pembolehubah

Action to be takenTindakan yang perlu diambil

Manipulated variablePembolehubah dimanipulasi

………………………………………...

………………………………………...

………………………………………...

Method to manipulate variableKaedah memanipulasikan pemboleh ubah

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

…………………………………………………

………………………………………………….Responding variablePembolehubah bergerak balas

………………………………………...

………………………………………...

………………………………………...

What to observe in the responding variablePerkara yang perlu diperhati dalam pembolehubah bergerak balas

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

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

.............................................................................Constant variablePembolehubah dimalarkan

………………………………………...

………………………………………...

………………………………………...

Method to maintain constant variableKaedah untuk menetapkan pemboleh ubah dimalarkan.............................................................................

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

………………………………………………….

SULIT 4 4541/3

(b) Based on data in Diagram 1.1, complete the table below.Berdasarkan data dalam Rajah 1.1, lengkapkan jadual di bawah.

For Examiner’sUse

1(b)

[3 + 3 marks] 6

(c) State the hypothesis for this experiment.Nyatakan hipotesis bagi eksperimen ini.

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

………………………………………………………………………………………................... [3 marks]

1(c)

3

4541/3 SULIT

SULIT 5 4541/3

(d) State two inferences based on the results of the reaction between lithium and waterNyatakan dua inferens berdasarkan kepada keputusan tindak balas antara litium dengan air.

…………………………………………………………………………………………………...

…………………………………………………………………………………………………... [3 marks]

For Examiner’sUse

1(d)

3

(e) Based on the observation in Diagram 1.1, arrange lithium, potassium and sodium in descending order of reactivity towards water.Berdasarkan pemerhatian dalam Rajah 1.1, susunkan litium, kalium dan natrium mengikut tertib kereaktifan logam terhadap air secara menurun.

……………...…………………………………………………………………………………… [3 marks]

1(e)

3

(f) The experiment is repeated using a small piece of rubidium to react with water.Rubidium is an alkali metal which is placed below potassium in the periodic table.Eksperimen diulangi menggunakan seketul kecil rubidium untuk ditindakbalaskan dengan air. Rubidium ialah logam alkali yang terletak di bawah kalium dalam jadual berkala.

Predict the observation for this experiment.Ramalkan pemerhatian bagi tindak balas ini.

...................……………………………………………………………………………………… [3 marks]

1(f)

3

(g) The student continued the experiment to determine the pH value of the solution formed in the basin.Pelajar tersebut meneruskan eksperimen untuk menentukan nilai pH bagi larutan yang terhasil di dalam besen.

Diagram 1.2 shows the reading of pH meter when the pH meter is dipped into the solution in the basin.Rajah 1. 2, menunjukkan bacaan meter pH apabila meter pH dicelupkan ke dalam larutan di dalam besen.


SULIT 6 4541/3

SetSet

Set-up of apparatusSusunan radas

I

pH valueNilai pH 13.13

pH meterMeter pH

Litium hydroxide solution

Larutan litium hidroksida

II

pH value13.43

Nilai pHpH meterMeter pH

Sodium hydroxide solution

Larutan natrium hidroksida

III

pH value 13.63

Nilai pH

pH meterMeter pH

Potassium hydroxide solution

Larutan kalium hidroksida

Diagram 1.2Rajah 1.2

4541/3 SULIT

SULIT 7 4541/3

(i) Record the pH value to one decimal place for Set I, Set II and Set III.Catatkan nilai pH pada satu tempat perpuluhan bagi Set I, Set II dan Set III.

Set I : ………………………………………………………………………………

Set II : ………………………………………………………………………………

Set III : ……………………………………………………………………………….[3 marks]

For Examiner’sUse

1(g)(i)

3

(ii) Construct a table to record the pH value for Set I, Set II and Set III.Bina satu jadual untuk merekod nilai pH bagi Set I, Set II dan Set III.

1(g)(ii)

[3 marks] 3

(iii) State the operational definition for the alkali.Nyatakan definisi secara operasi bagi alkali.

.................…………………………………………………………………………………

………….………………………………………………………………………………… [3 marks]

1(g)(iii)

3


SULIT 8 4541/3

(iv) The following is a list of chemical substances with pH value:Berikut ialah senarai beberapa bahan kimia dengan nilai pH

For Examiner’sUse

Chemical substanceBahan kimia

pH valueNilai pH

Ammonia solution, NH3Larutan ammonia, NH3

10

Potassium hydroxide solution, KOHLarutan kalium hidroksida KOH 14

Sodium hydroxide solution, NaOHLarutan natrium hidroksida NaOH 13

Classify these substances into strong alkali and weak alkali.Kelaskan bahan-bahan ini kepada alkali kuat dan alkali lemah.

1(g)(iv)

[3 marks]3

4541/3 SULIT

[Lihat sebelah

SULIT 9 4541/3

2ExperimentEksperimen

ResultKeputusan

For Examiner’s

Molten lead(II)bromidePlumbum(II)bromida lebur

Bulb lights upMentol menyala

Molten naphthaleneNaftalena lebur Bulb does not light up

Mentol tidak menyala

Diagram 2Rajah 2

Diagram 2 shows the apparatus set-up for an experiment to compare the electrical conductivity between two types of chemical compound.Rajah 2 menunjukkan susunan radas bagi satu eksperimen untuk membezakan kekonduksian elektrik di antara 2 jenis sebatian kimia.Refering to the situation above, plan a laboratory experiment to investigate the difference in electrical conductivity between an ionic compound and a covalent compound.Merujuk kepada situasi di atas, rancang satu eksperimen dalam makmal untuk mengkaji perbezaan kekonduksian elektrik di antara sebatian ionik dan sebatian kovalen.

Your planning should include the following aspects:Perancangan anda hendaklah mengandungi aspek-aspek berikut:

(a) Problem of statementPernyataan masalah

(b) All the variablesSemua pembolehubah

(c) HypothesisHipotesis

(d) List of materials and apparatusSenarai bahan dan radas

(e) ProcedureProsedur

(f) Tabulation of dataPenjadualan data

2

[17 marks] 17[17 markah]


4541/3 SULIT

4541/3Chemistry 3Oktober2012

SMK SIMANGGANGSRI AMAN

PEPERIKSAAN AKHIR TAHUN TINGKATAN 4

2012

CHEMISTRY 3

PERATURAN PEMARKAHAN

Skema Pemarkahan ini mengandungi 11 halaman bercetak

2

MARKING SCHEME OF PAPER 3

Question Details Score

1(a)

[Able to state all the observations correctly]

Sample answer :

3Set Observation

I Lithium moves slowly on the water surface

II Sodium moves faster on the water surface with a hissing sound and ignites with a yellow flame.

III Potassium moves vigorously on the water surface with a hissing and ‘pop’ sound and ignites with a lilac flame

[Able to state any two observations correctly] 2[Able to state any one observation incompletely] 1[No response given or wrong response] 0

1 (b)

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

Sample answer:

6

Manipulated variable:

Type of alkali metalsUse different type of alkali metals

Responding variable:

Reactivity of alkali metals

Observe the reactivity of alkali metals when react with water

Fixed variable:

Water// size of alkali metals

Use water // same size of metals in each experiment .

[Able to state any 5 of the above information correctly] 5[Able to state any 4 of the above information correctly ] 4[Able to state any 3 of the above information correctly] 3[Able to state any 2 of the above information correctly ] 2[Able to state at least 1 of the above information correctly ] 1[No response given or wrong response] 0

3


1 (c)

[Able to state the relationship between the manipulated variable and the responding variable correctly with direction]

Sample answer:

When going down Group 1, alkali metals become more reactive in their reactions with water //

The lower the position of an alkali metal in the Periodic Table, the more reactive it is when reacts with water

3

[Able to state the relationship between the manipulated variable and the responding variable]

Sample answer:

The lower position of an alkali metal in the Periodic Table, the more reactive is the metal.

2

[Able to state an idea of hypothesis]

Sample answer:

Alkali metal have different reactivity. Alkali metal reacts with water

1

[No response given or wrong response] 0

1 (d)

[Able to state two inferences correctly ]

Sample answer:1. Lithium is the least reactive metal towards water2. Lithium hydroxide is formed.3. Hydrogen gas is released4. Alkali solution is produced

3

[Able to state one inference correctly]Or[Able to state two inferences incompletely] 2

[Able to state an idea of inference]

Sample answer: Reaction occurs 1


4


1 (e)

[Able to arrange the position of all metals in descending order of reactivity correctly]

Sample answer:

P o t a ssi u m / K , So d i u m / N a , L i t h i u m / L i

3

[Able to arrange the position of at least two adjacent metals indescending order of reactivity correctly]

Sample answer:Lithium/Li, Po t a ssi u m / K , S o d i u m / N a // S od i u m / N a , Li t h i u m / L i , Potassium/K

2

[Able to give an idea to arrange the metals]

Sample answer:Lithium/Li, Sodium/Na, Potassium/K P o t a ssi u m /K Lithium/Li, Sodium/Na, Sodium/Na, Potassium/K , L it h i u m / L i

1


1(f)

[Able to predict the observation for the reaction between rubidium andwater correctly ]

Sample answer:Rubidium moves more vigorously / violently / produces white fume.

3

[Able to predict the observation for the reaction between rubidium andwater]

Sample answer:Rubidium moves vigorously.

2

[Able to state an idea to predict the observation for the reaction betweenrubidium and water]

Sample answer:Rubidium is more reactive.

1


5


1 (g)(i)

[Able to record all the pH meter reading with one decimal placeaccurately]:

Sample answer:Set I : 13.1Set II : 13.4Set III : 13.6

3

[Able to record any two readings accurately]Or[Able to record all the pH meter readings without one decimal place correctly]

2

[Able to record at least one reading correctly] 1[No response given or wrong response] 0

1(g)(ii)

Able to construct a table to record the pH value for Set I, Set II andSet III of experiment that includes the following :

1. Correct titles2. pH values

Sample answer:3Set Ph

I 13.1

II 13.4

III 13.6

Able to construct a table that contains the following:1. Titles2. pH values

Sample answer:

2pH

I 13.1

II 13.4

III 13.6

Able to construct a table with at least one title/reading. 1[No response given or wrong response] 0

6


1(g)(iii)

[Able to state the operational definition for alkali correctly]

Sample answer:pH value that is more than 7 when pH meter is dipped into a solution.

3

[Able to state the operational definition for alkali incompletely]

Sample answer:pH value that is more than 7.

2

[Able to state an idea of operational definition for alkali ]

Sample answer:pH that is 13.

1


1(g)(iv)

[Able to classify all the substances correctly]Sample answer:

3Strong alkali Weak alkaliSodium hydroxide solutionPotassium hydroxide solution

Ammonia solution

[Able to classify any two substances correctly] 2

[Able to classify any one substance correctly] 1[No response given or wrong response] 0

7


2(a)

Able to give the problem statement accurately and in questionform.

Sample answer:What is the difference in electrical conductivity between ionic compound and covalent compound?

3

Able to give the statement of the problem correctly.

Sample answer:How does different type of chemical compound affect the electrical conductivity?

2

Able to give an idea of statement of the problem .

Sample answer:To investigate the electrical conductivity between different type of chemical compound.

1

No response or wrong response 0

2(b)

Able to state all the three variables correctly.

Sample answer:Manipulated variable: Type of chemical compound/ molten

lead(II)bromide and molten naphthaleneResponding variable : Electrical conductivity / the light of

the bulbControlled variable : Mass/state of the chemical compound //

lead(II)bromide and molten naphthalene

3

Able to state any two variables correctly 2Able to state any one variable correctly 1No response or wrong response 0

8


2(c)

Able to state the relationship between the manipulated variable andthe responding variable correctly with direction.

Sample answer:Molten ionic compound / lead(II)bromide can conduct electricity / while molten covalent compound / molten naphthalene cannot conduct electricity

3

Able to state the relationship between the manipulated variable andthe responding variable with direction .

Sample answer:Ionic compound can / cannot conduct electricity while covalent compound cannot / can conduct electricity

2

Able to state the idea of the hypothesis.

Sample answer:Different compound have different property of electrical conductivity.

1


9


2(d)

Able to give adequate list of materials and apparatus.

Sample answer: M a t e r i als

1 Lead (II) bromide2 Naphthalene

A p p a r at u s 1 Crucible2 Batteries3 Bulb4 Switch5 Carbon electrodes6 Tripod stand7 Bunsen Burner8 Pipe-clay triangle9 Connecting wire

3

Able to give a list of materials and apparatus.

Sample answer: M a t e r i als

1 Lead (II) bromide2 Naphthalene

A p p a r at u s 1 Crucible / Any container2 Batteries3 Bulb/voltmeter/ammeter4 Electrodes5 Bunsen Burner6 Connecting wire

2

Able to give an idea of materials and apparatus.

Sample answer: M a t e r i al

Lead (II) bromide / naphthaleneA p p a r at u s

1 Any container2 Batteries3 Ammeter / bulb / voltmeter4 Electrodes5 Bunsen burner

1


10


2(e)

Able to state the following steps:

Sample answer:1 Fill a crucible with a solid lead(II)bromide, PbBr2 until it is

half full.2 Complete the circuit.3 Heat the solid lead(II)bromide until it melts.4 Observe whether the bulbs light up or not.5 Record the observation.6 Repeat ste p s 1 to 5 / t h e e xp e r i m e n t using naphthalene.

3

Able to state at least the following steps:

Sample answer:Steps 2, 3,5 and 6

2

Able to state at least the following steps:

Sample answer:Step 2, 3 and 5

1


Chemical compound ObservationLead(II)bromideNaphthalene

Observationlead(II)bromide/Naphthalene

11


2(f)

Able to tabulate the data that includes the following information:1. Correct titles2. Complete list of chemical compound

S a m p le a n s w er : 2

Able to construct a table with:1. At least one title2. Incomplete list of chemical compound

Sample answer :1


END OF MARK SCHEME

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Kimia F4 2011 AKT