kimia f4 2011 akt
TRANSCRIPT
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
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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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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
D II, III and IV 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
D II, III 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
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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
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Untuk kegunaan pemeriksaBahagian No. Markah
A
123456Jumlah
B78
C910Jumlah
Jumlah Markah
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Nama
Kelas
SMK SIMANGGANG, SRI AMAN
PEPERIKSAAN AKHIR TAHUN TINGKATAN 4 2012CHEMISTRY Kertas 2Oktober 2011
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2 ½ jam Dua jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
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.
Kertas soalan ini mengandungi 17 halaman bercetak
[Lihat sebelah
Z
SULIT 2
Section A [60 marks]
Answer all questionsJawab semua soalan
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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
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(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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(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 ]
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(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 ]
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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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(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 ]
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(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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(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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Section B[20 marks]
Answer any one question from this sectionJawab mana-mana satu soalan dari bahagian ini
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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 ]
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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 ]
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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]
END OF QUESTION PAPERKERTAS SOALAN TAMAT
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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.
4541/2 [Lihat sebelahSULIT
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
PEPERIKSAAN AKHIR TAHUN TINGKATAN 4 2012CHEMISTRY Kertas 3Oktober 2011
4541/3
1 ½ jam Satu jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
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 .
Kertas soalan ini mengandungi 9 halaman bercetak
[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
4541/3 [Lihat sebelahSULIT
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.
4541/3 [Lihat sebelahSULIT
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
4541/3 [Lihat sebelahSULIT
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]
END OF QUESTION PAPERKERTAS SOALAN TAMAT
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
Question Details Score
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
[No response given or wrong response] 0
4
Question Details Score
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
[No response given or wrong response] 0
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
[No response given or wrong response] 0
5
Question Details Score
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
Question Details Score
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
[No response given or wrong response] 0
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
Question Details Score
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
Question Details Score
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
No response or wrong response 0
9
Question Details Score
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
No response or wrong response 0
10
Question Details Score
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
No response or wrong response 0
Chemical compound ObservationLead(II)bromideNaphthalene
Observationlead(II)bromide/Naphthalene
11
Question Details Score
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
No response or wrong response 0
END OF MARK SCHEME