SULIT 4541/1 Chemistry 2008 1¼ jam SEKOLAH BERASRAMA … · kah bilangan elek: tron valen bagi ......
Transcript of SULIT 4541/1 Chemistry 2008 1¼ jam SEKOLAH BERASRAMA … · kah bilangan elek: tron valen bagi ......
SULIT 4541/1
4541/1
Chemistry
Paper 1
Ogos
2008
1¼ jam
SEKOLAH BERASRAMA PENUH
BAHAGIAN PENGURUSAN
SEKOLAH BERASRAMA PENUH/KLUSTER
KEMENTERIAN PELAJARAN MALAYSIA
______________________________________________
PEPERIKSAAN PERCUBAAN SPM TAHUN 2008
KIMIA
Kertas 1
Satu jam lima belas minit
JANGAN BUKA KERTAS SOALAN INI HINGGA DIBERITAHU
1. Kertas soalan ini mengandungi 50 soalan.
2. Jawab semua soalan
3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan
4. Bagi setiap soalan hitamkan satu ruangan sahaja
5. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah
dibuat. Kemudian hitamkan jawapan yang baru.
6. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala.
7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh
diprogramkan.
Kertas soalan ini mengandungi 22 halaman bercetak
http://cikguadura.wordpress.com/
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1. Diagram 1 shows the electron arrangement of an atom of element P.
Rajah 1 menunjukkan susunan elektron bagi atom unsur P.
What is the number of valence electrons in atom P ?
Berapakah bilangan elektron valen bagi atom P?
A 7
B 6
C 5
D 4
2. What are the symbols of the elements of chromium, copper , manganese and potassium?
Apakah simbol bagi unsur kromium, kuprum, mangan dan kalium?
Chromium
Kromium
Copper
Kuprum
Manganese
Mangan
Potassium
Kalium
A C Co Mg K
B C Cu Mn P
C Cr Co Mg P
D Cr Cu Mn K
3. 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.
Which of the following scientists made the above statement?
Antara saintis berikut siapakah yang membuat pernyataan di atas?
A Meyer
B Newlands
C Mendeleev
D Dobereiner
Elements are arranged in order of increasing atomic mass in The Periodic Table
Unsur-unsur disusun mengikut jisim atom menaik dalam Jadual Berkala
P
Diagram 1
Rajah 1
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4. Diagram 2 shows the set-up of the apparatus for electrolysis.
Diagram 2 menunjukkan susunan radas bagi elektrolisis.
Which of the following compounds could be used as substance X?
Antara berikut, yang manakah boleh digunakan sebagai bahan X?
A Ethene, C2H4
Etana, C2H4
B Sodium chloride solution, NaCl
Natrium klorida, NaCl
C Chloromethane, CH3Cl
Klorometana, CH3Cl
D Ethyl ethanoate, CH3COOC2H5
Etil etanoat, CH3COOC2H5
5. What are the ions present in molten sodium chloride and sodium chloride aqueous
solution?
Apakah ion-ion yang wujud dalam leburan natrium klorida dan larutan akues natrium
klorida?
Molten sodiun chloride
Leburan natrium klorida
Sodium chloride aqueous solution
Larutan akues natrium klorida
A Na+ , H
+, Cl
-, OH
- Na
+ , H
+, Cl
- ,
B Na+, Cl
- OH
-, Cl
-
C Na+, Cl
- Na
+, Cl
- , H
+ , OH
-
D Na+, OH
- Na
+, Cl
- , H
+ , OH
-
6. Which of the following solutions can show a pH value of 8?
Antara larutan berikut yang manakah boleh menunjukkan nilai pH 8?
A 0.1 mol dm-3
of ethanoic acid
Asid etanoik 0.1 mol dm-3
B 0.1 mol dm-3
of hydrochloric acid
Asid hidroklorik 0.1 mol dm-3
C 0.1 mol dm-3
of ammonia solution
Larutan ammonia 0.1 mol dm-3
D 0.1 mol dm-3
of sodium hydroxide solution
Larutan natrium hidroksida 0.1 mol dm-3
Substance X
Bahan X
Diagram 2
Rajah 2
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7. Which of the following compounds is a soluble salt?
Antara sebatian berikut, yang manakah adalah garam terlarutkan?
A Lead(II) iodide
Plumbum(II) iodida
B Barium sulphate
Barium sulfat
C Calcium chloride
Kalsium klorida
D Magnesium carbonate
Magnesium karbonat
8. Diagram 3 shows the stages involved in the Contact Process to produce sulphuric acid.
Rajah 3 menunjukkan peringkat yang terlibat dalam Proses Sentuh untuk menghasilkan
asid sulfurik.
2SO2 + O2 I 2SO3 II
H2S2O7 III H2SO4
What is the optimum temperature and the catalyst used in stage I?
Apakah suhu optimum dan mangkin yang digunakan dalam peringkat I?
Temperature / oC
Suhu/ oC
Catalyst
Mangkin
A 450 Vanadium(V) oxide
Vanadium(V) oksida
B 200 Vanadium(V) oxide
Vanadium(V) oksida
C 450 Iron powder
Serbuk besi
D 300 Iron powder
Serbuk besi
9. Which of the following compounds is an organic compound?
Antara sebatian berikut, yang manakah sebatian organik?
A Calsium carbonate, CaCO3
Kalsium karbonat, CaCO3
B Carbonic acid, H2CO3
Asid karbonik, H2CO3
C Carbon dioxide, CO2
Karbon dioksida, CO2
D Glucose, C6H12O6
Glukos, C6H12O6
Diagram 3
Rajah 3
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10. Diagram 4 shows the graph of volume of carbon dioxide gas against time when 5 g of
marble chips is added to 50 cm3 of 0.2 mol dm
-3 hydrochloric acid.
Rajah 4 menunjukkan graf isipadu gas karbon dioksida melawan masa apabila 5g ketulan
marmar dimasukkan ke dalam 50 cm3 asid hidroklorik 0.2 mol dm
-3.
At what time the rate of reaction the highest?
Pada masa manakah kadar tindak balas paling tinggi?
A t1
B t2
C t3
D t4
11. The following ionic equation shows a redox reaction.
Persamaan ion di bawah mewakili satu tindak balas redoks.
2Fe²+ + Br2 → 2Fe³
+ + 2Br ֿ
Which of the following is true about the reaction?
Antara pernyataan berikut, yang manakah benar berkaitan tindakbalas di atas?
A Iron(III) ion, Fe3+
is reduced
Ion ferum(III), Fe3+
diturunkan
B Iron(II) ion, Fe²+ is oxidised
Ion ferum(II), Fe²+ dioksidakan
C Bromine water is a reducing agent
Air bromin merupakan agen penurunan
D Bromide ion is an oxidising agent
Ion bromida merupakan agen pengoksidaan
12 Which of the following processes absorbs heat energy?
Antara proses berikut yang manakah merupakan proses serap tenaga haba?
A Combustion of a hydrocarbon
Pembakaran hidrokarbon
B Neutralisation between acid and alkali
Peneutralan antara asid dan alkali
C Dissolving sodium hydroxide in water
Melarutkan natrium hidroksida dalam air
D Breaking the H-H bond in the hydrogen molecule
Memecahkan ikatan H-H dalam molekul hidrogen
Isipadu gas CO2 / cm3
Time / s 0 t1 t2 t3 t4 Masa / s
Volume of CO2 gas / cm3
Diagram 4
Rajah 4
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13. Which of the following structural formulas is of soap?
Antara formula struktur berikut yang manakah bagi sabun?
A
B
C
D
14. Atom of element X has a proton number of 13. Where is X located in the Periodic Table of
Elements?
Atom unsur X mempunyai nombor proton 13. Dimanakah kedudukan X di dalam Jadual
Berkala Unsur?
Group
Kumpulan
Period
Kala
A 3 2
B 3 3
C 13 2
D 13 3
15. Which of the following substances is made up of atoms?
Antara bahan berikut yang manakah terdiri daripada atom-atom?
A Argon
B Nitrogen
C Chlorine
D Ammonia
16. Which of the following physical properties is true of copper(II) chloride?
Antara sifat fizik berikut yang manakah benar bagi kuprum(II) klorida?
A It is a volatile substance
Ia adalah sebatian yang meruap
B It dissolves in organic solvent
Ia larut dalam pelarut organik
C It conduct electricity in aqueous solution
Ia mengkonduksi elektrik dalam larutan akues
D It burns in oxygen to produce white fumes
Ia terbakar dalam oksigen dengan nyalaan putih
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Heat
Panaskan
Diagram 5
Rajah 5
17. Diagram 5 shows the set up of apparatus to determine the empirical formula for metal
oxide.
Rajah 5 menunjukkan susunan radas untuk menentukan formula empirik oksida logam.
Which of the following metals is most suitable to be used in the diagram?
Logam yang manakah yang paling sesuai digunakan dalam rajah itu?
A Lead
Plumbum
B Silver
Argentum
C Copper
Kuprum
D Magnesium
Magnesium
18 Which of the following ions form a precipitate that dissolve in excess ammonia solution?
Antara ion-ion berikut, yang manakah akan menghasilkan mendakan yang larut dalam
larutan ammonia berlebihan?
I Zn2+
II Al3+
III Pb2+
IV Cu2+
A I and IV only
B II and IV only
C I and III only
D I, II and III only
19 Element X is a reducing agent. Which of the following electron arrangements
is for atom X ?
X adalah agen penurunan. Antara susunan elektron berikut adalah bagi atom
unsur X?
A 2.8.2
B 2.8.8
C 2.8.7
D 2.8.4
Metal
Logam
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Diagram 6
Rajah 6
20 Diagram 6 shows a metal X spoon dipped in a salt solution inside metal Y container.
Rajah 6 menunjukkan sudu logam X direndamkan dalam larutan garam di dalam bekas
logam Y
If element X is more electropositive than Y, which of the following statements are true
about the diagram?
Jika unsur X lebih elektropositif daripada Y, pernyataan yang manakah betul berkaitan
tindak balas di atas?
I Metal X spoon undergoes corrosion
Sudu X logam mengalami kakisan
II Metal Y is oxidised
Logam Y teroksida
III Mass of metal X spoon decreases
Jisim sudu X logam berkurang
IV Atom of metal X spoon is ionised
Atom sudu X logam mengion
A I and III only
B II and IV only
C I, III and IV only
D I, II, III and IV
21 Which of the following solutions have the same number of hydrogen ions, H+, as in 50
cm3 of 0.1 mol dm
-3 sulphuric acid, H2SO4?
Antara larutan berikut, yang manakah mempunyai bilangan ion hidrogen, H+, sama
seperti dalam 50 cm3 0.1 mol dm
-3 asid sulfurik, H2SO4?
I 100 cm3 of 0.1 mol dm
-3 hydrochloric acid, HCl
100 cm3 0.1 mol dm
-3 asid hidroklorik, HCl
II 50 cm3 of 0.2 mol dm
-3 nitric acid, HNO3
50 cm3 0.2 mol dm
-3 asid nitrik, HNO3
III 100 cm3 of 0.1 mol dm
-3 ethanoic acid, CH3COOH
100 cm3 0.1 mol dm
-3 asid etanoik, CH3COOH
IV 50 cm3 of 0.1 mol dm
-3 phosphoric acid, H3PO4
50 cm3 0.1 mol dm
-3 asid fosforic, H3PO4
A I and II only
B I and III only
C III and IV only
D I, II and III only
Metal Y container
Bekas Y logam
Metal X spoon
Sudu X logam
Salt solution
Larutan garam
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22. Diagram 7 shows molecular structure of a polymer.
What is the name of the monomer of the polymer in the diagram?
Apakah nama monomer bagi polimer dalam rajah tersebut?
A Ethene
Etena
B Butene
Butena
C Propene
Propena
D Chloroethene
Kloroetena
23 Table 1 shows the relative atomic mass of helium, carbon, sulphur and copper
Jadual 1 menunjukkan jisim atom relatif bagi helium, karbon, sulfur dan kuprum
Element
Unsur Helium Carbon Sulphur Copper
Relative atomic mass
Jisim atom relatif 4 12 32 64
Table 1
Jadual 1
Which of the following statements is true?
Antara pernyataan berikut yang manakah benar?
[ Avogadro constant = 6.0 x 1023
mol-1
]
[ Pemalar Avogadro = 6.0 x 1023
mol-1
]
A Mass of one copper atom is 64 g
Jisim satu atom kuprum ialah 64 g
B Mass of 1 mol of helium is 8 g
Jisim 1 mol gas helium ialah 8 g
C 32 g of sulphur contains 6.02 x 1023
sulphur atom
32g sulfur mempunyai 6.02 X 10 23
atom sulfur
D Mass of one sulphur atom is 32 times bigger than one carbon atom
Jisim satu atom unsur ialah 32 kali lebih besar daripada jisim satu atom karbon
Diagram 7
Rajah 7
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24. Diagram 8 shows the energy profile diagram for the following reaction:
Rajah 8 menunjukkan gambar rajah aras tenaga bagi tindak balas berikut:
K + L → M + N
Diagram 8
Rajah 8
What is the value of the activation energy?
Apakah nilai tenaga pengaktifan?
A 25 kJ
B 45 kJ
C 75 kJ
D 120 kJ
25. In the saponification process, concentrated sodium hydroxide solution is added to
boiling vegetable oils to produce X and soaps. What is X?
Dalam process saponifikasi, larutan natrium hidroksida pekat ditambahkan kepada
minyak sayuran yang didih untuk menghasilkan X dan sabun. Apakah X?
A Ethanol
Etanol
B Glycerol
Gliserol
C Propanol
Propanol
D Butanoic acid
Asid butanoik
120 kJ
Energy
Tenaga
K + L
M + N 75 kJ
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26. Diagram 9 shows the energy level diagram for the reaction between silver ions and
chloride ions.
Rajah 9 menunjukkan gambar rajah aras tenaga bagi tindak balas antara ion argentum
dengan ion klorida.
Which of the following statements is true about this reaction?
Yang manakah antara pernyataan berikut adalah benar mengenai tindak balas ini?
A Endothermic reaction occurs
Tidak balas endotermik berlaku
B The energy content of the product is higher than the reactants
Kandungan tenaga hasil tindak balas adalah lebih tinggi daripada bahan tindak
balas
C 65 kJ of heat is absorbed when 1 mol of silver chloride is formed
65 kJ tenaga diserap apabila 1 mol argentum klorida terbentuk
D The final temperature at the end of the reaction is higher than the initial
temperature
Suhu akhir tindak balas adalah lebih tinggi daripada suhu awal tindak balas
27. Atom of oxygen-18 has 8 electrons. How many neutrons does an atom of oxygen-18
contains?
Atom oksigen-18 mempunyai 8 elektron. Berapakah bilangan neutron bagi atom oksigen-
18?
A 6
B 8
C 10
D 18
28. The following elements are in Group 17 in the Periodic Table of Elements except
Unsur-unsur berikut berada dalam Kumpulan 17 dalam Jadual Berkala Unsur kecuali
A bromine
bromin
B chlorine
klorin
C helium
helium
D iodine
iodin
Energy
Ag+(aq) + Cl
- (aq)
AgCl(s)
H = - 65.5 kJmol-1
Diagram 9
Rajah 9
Tenaga
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29. The following statement is about X3+
ion.
Pernyataan berikut adalah berkaitan ion X3+
.
Which of the following proton numbers and nucleon numbers shows for atom X?
Yang manakah antara berikut menunjukkan nombor proton dan nombor nukleon bagi
atom X ?
Proton number
Nombor proton
Nucleon number
Nombor nukleon
A 10 14
B 10 27
C 13 14
D 13 27
30. Diagram 10 shows the electron arrangement of a compound formed between element T
and element Q.
Diagram 10 menunjukkan susunan elektron bagi sebatian yang terbentuk daripada
unsur T dan unsur Q.
T+ Q
2- T
+
What group in the Periodic Table of Elements is element Q located?
Apakah kumpulan dalam Jadual Berkala Unsur kedudukan unsur Q?
A 2
B 8
C 16
D 18
31. Which of the following pairs of substances is most suitable to prepare copper(II) sulphate
salt?
Yang manakah antara pasangan bahan kimia berikut paling sesuai untuk menyediakan
garam kuprum(II) sulfat ?
A Copper with dilute sulphuric acid
Kuprum dan larutan asid sulfurik cair
B Copper(II) chloride with dilute sulphuric acid
Kuprum(II) klorida dan larutan asid sulfurik cair
C Copper(II) carbonate with dilute sulphuric acid
Kuprum(II) karbonat dan larutan asid sulfurik cair
D Copper(II) nitrate solution with sodium sulphate solution
Larutan kuprum(II) nitrat dan larutan natrium sulfat
2- + +
Diagram 10
Rajah 10
X3+ ion has 14 neutrons and 10 electrons.
Ion X3+
mempunyai 14 neutron dan 10 elektron
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32 Diagram 11 shows the set-up of apparatus of an electrolysis process.
Rajah 11 menunjukkan susunan radas bagi satu proses elektrolisis.
Which of the following electrolytes produce oxygen gas at electrode X ?
Antara ektrolit berikut, yang manakah menghasilkan gas oksigen di elektrod X ?
I 1.0 mol dm-3
hydrochloric acid
Asid hidroklorik 1.0 mol dm-3
II 1.0 mol dm-3
sulphuric acid
Asid sulfurik 1.0 mol dm-3
III 1.0 mol dm-3
potassium nitrate solution
Larutan kalium nitrat 1.0 mol dm-3
IV 1.0 mol dm-3
potassium bromide
Larutan kalium bromida 1.0 mol dm-3
A I and II only
B II and III only
C III and IV only
D II , III and IV only
33. The following equation represents the reaction between sodium hydroxide solution and
dilute sulphuric acid.
Persamaan berikut mewakili tindak balas antara larutan natrium hidroksida dengan asid
sulfurik cair.
H2SO4 + 2NaOH → Na2SO4 + 2H2O
What is the volume of 0.5 mol dm-3
sulphuric acid needed to neutralise 50 cm3 of
0.5 mol dm-3
sodium hydroxide?
Apakah isipadu 0.5 mol dm-3
asid sulfurik yang diperlukan untuk meneutralkan 50 cm3
0.5 mol dm-3
narium hidroksida?
A 12.5 cm3
B 25.0 cm3
C 50.0 cm3
D 75.0 cm3
A
Carbon electrodes
Elektrod karbon
Electrolyte
Elektrolit
X
Diagram 11
Rajah 11
Y
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34. Which of the following statements explains why ceramic is suitable to make an engine
block?
Yang manakah antara pernyataan berikut menerangkan mengapa seramik sesuai untuk
membina blok enjin?
A Ceramic is chemically inert
Seramik adalah lengai secara kimia
B Ceramic is an electric conductor
Seramik adalah konduktor elektrik
C Ceramic can withstand high temperature
Seramik boleh tahan suhu yang tinggi
D Ceramic has a low specific heat capacity
Seramik mempunyai muatan haba tentu yang rendah
35. Table 3 shows the proton number of elements S, T, U and V.
Jadual 3 menunjukkan nombor proton bagi unsur S, T, U dan V.
Element
Unsur S T U V
Proton number
Nombor proton 11 14 16 19
Table 3
Jadual 3
What is the arrangement of elements S, T, U and V in ascending order of atomic size?
Apakah susunan saiz atom secara menaik bagi unsur-unsur S,T, U dan V ?
A S, T, U, V
B S, V, T, U
C V, U, T, S
D U, T, S, V
36.
C4H8 is the molecular formula for isomers X and Y.
C4H8 ialah formula molekul bagi isomer X dan Y.
Which of the following statements is true of isomers X and Y?
Antara pernyataan berikut yang manakah benar tentang X dan Y?
A
B
C
D
X and Y have similar molecular structure
X dan Y mempunyai struktur molekul yang sama
X and Y have similar chemical properties
X dan Y mempunyai sifat kimia yang sama
X and Y have different relative molecular mass
X dan Y mempunyai jisim molekul relatif yang sama
X and Y have similar physical properties
X dan Y mempunyai sifat fizik yang sama.
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37. Diagram 12 shows curve X obtained when 8 g of granulated zinc (in excess) is reacted
with 50 cm3 of 1 mol dm
-3 sulphuric acid.
Rajah 12 menunjukkan lengkung X apabila 8 g ketulan zink (berlebihan) bertindak balas
dengan 50 cm3 asid sulfurik 1 mol dm
-3.
Diagram 12
Rajah 12
Which of the following reactions produces curve Y?
Antara tindak balas berikut yang manakah menghasilkan lengkung Y?
A 8 g zinc powder + 50 cm3 of 2 mol dm
-3 sulphuric acid
8 g serbuk zink + 50 cm3 of 2 mol dm
-3 sulfurik acid
B 8 g zinc powder + 50 cm3 of 1 mol dm
-3 of sulphuric acid
8 g serbuk zink + 50 cm3 of 1 mol dm
-3 sulfurik acid
C 8 g granulated zinc + 100 cm3 of 1 mol dm
-3 of sulphuric acid
8 g ketulan zink + 100 cm3 of 1 mol dm
-3 sulfurik acid
D 8 g granulated zinc + 50 cm3 of 2 mol dm
-3 of sulphuric acid
8 g ketulan zink + 50 cm3 of 2 mol dm
-3 sulfurik acid
38. The following statements are about atom G and J.
Pernyataan berikut adalah mengenai atom G dan J.
Electron arrangement of atom G is 1
Susunan elektron atom G ialah 1
Proton number of atom J is 6
Nombor proton atom J ialah 6
What is the formula of the compound formed between G and J?
Apakah formula bagi sebatian yang terbentuk antara G dan J?
A JG
B JG2
C JG3
D JG4
Volume of hydrogen gas (cm3)
Isipadu gas hidrogen (cm3)
Time (s)
Masa(s)
Y
X
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39. Diagram 13 shows the set up of apparatus to investigate the effect of metals X, Y and Z
on the rusting of iron
Rajah 13 menunjukkan susunan radas untuk mengkaji kesan logam X, Y dan Z ke atas
pengaratan paku besi
Experiment
A B C
Material
Bahan
Iron nail and metal X
Paku besi dengan
logam X
Iron nail and metal Y
Paku besi dengan
logam Y
Iron nail and metal Z
Paku besi dengan
logam Z
Observation
Pemerhatian
Small amount of blue spot
Sedikit tompok biru
No change
Tiada perubahan
A lot of blue spot
Banyak tompok biru
Diagram 13
Rajah 13
Which of the following arrangements of metals X, Y and Z is in descending order of their
electropositivity ?
Yang manakah antara berikut adalah susunan logam X , Y dan Z mengikut tertib
kelektropositifan menurun ?
A X , Y , Z
B Y , X , Z
C Z , X , Y
D Y , Z ,X
40. 7 g of potassium hydroxide is dissolved in distilled water to form 250 cm3 of solution.
What is the molarity of the potassium hydroxide solution?
[Relative atomic mass: H=1, O=16, K=39]
7 g kalium hidroksida dilarutkan ke dalam air suling untuk membentuk 250 cm3 larutan.
Apakah kemolaran larutan kalium hidroksida tersebut?
[Jisim atom relatif: H=1, O=16, K=39]
A 0.03 mol dm-3
B 0.05 mol dm-3
C 0.30 mol dm-3
D 0.50 mol dm-3
Hot agar solution + potassium
hexacyanoferrate(III)
Agar-agar panas + kalium
heksasianoferrat(III)
Hot agar solution +
potassium
hexacyanoferrate(III)
Agar-agar panas +
kalium
heksasianoferrat(III)
Hot agar solution +
potassium
hexacyanoferrate(III)
Agar-agar panas +
kalium
heksasianoferrat(III)
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41. Diagram 14 shows the energy level diagram of the displacement reaction between
magnesium and iron(II) chloride solution.
Rajah 14 menunjukkan gambar rajah aras tenaga bagi tindak balas penyesaran antara
magnesium dan larutan ferum(II) sulfat.
What is the increase in temperature if 50 cm3
of 0.25 mol dm-3
iron(II) chloride solution is
reacted with excess magnesium,?
Berapakah kenaikan suhu, jika 50 cm3 0.25 mol dm
-3 larutan ferum(III) klorida ditindak
balaskan dengan berlebihan magnesium ?
[Specific heat capacity of the solution = 4.2 J g-1 o
C-1
]
[Muatan haba tentu larutan = 4.2 J g-1 o
C-1
]
A 12 oC
B 16 oC
C 22 oC
D 24 oC
42. Table 3 shows the results of an experiment for three chemical cells P, Q and R.
Jadual 3 menunjukkan keputusan eksperimen bagi tiga sel kimia P, Q dan R.
Chemical cell
Sel kimia
Pairs of metals
Pasangan logam
Voltage (V)
Voltan (V)
Negative terminal
Terminal negatif
P X – Y 0.45 X
Q X – Z 0.60 Z
R Y – Z 1.05 Z
Table 3
Jadual 3
Which of the following arrangements of metals X, Y and Z is in descending order of
electropositivity in the electrochemical series?
Antara berikut yang manakah susunan logam X,Y dan Z mengikut tertib elektropositif
menurun dalam siri elektrokimia?
A Z, X, Y
B Z, Y, X
C X, Y, Z
D X, Z, Y
Energy
Mg(s) + FeCl2(aq)
Fe(s) + MgCl2(aq)
H = - 201.6 kJmol-1
Diagram 14
Rajah 14
Tenaga
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43. Diagram 15 shows curve W obtained from the decomposition of 20 cm3 of 0.40 mol dm
-3
hydrogen peroxide solution, H2O2, using 0.2 g of manganese (IV) oxide as catalyst at a
temperature of 30 0C.
Rajah 15 menunjukkan lengkung W terbentuk daripada penguraian 20 cm3 larutan
hidrogen peroksida 0.40 mol dm-3
, di mangkinkan oleh mangan(IV) oksida pada suhu
300C.
Diagram 15
Rajah 15
Which of the following experiments will produce curve X?
Antara eksperimen berikut yang manakah akan menghasilkan lengkung X?
Volume of H2O2 /cm3
Isipadu H2O2 /cm3
Concentration of H2O2/ mol dm-3
Kepekatan H2O2 /mol dm-3
Temperature /0C
Suhu / 0C
A 10 0.60 30
B 15 0.20 30
C 20 0.60 40
D 30 0.30 40
44. Table 4 shows the melting and boiling points of substances P, Q, R and S..
Jadual 4 menunjukkan takat lebur dan takat didih untuk bahan P, Q, R dan S..
Substance
Bahan
Melting point / 0C
Takat lebur / 0C
Boiling point / 0C
Takat didih / 0C
P -59 60
Q 48 130
R -110 -70
S 128 470
Table 4
Jadual 4
Which of the following substances has the highest kinetic energy at room temperature?
Antara bahan berikut yang manakah mempunyai tenaga kinetic yang paling tinggi pada
suhu bilik?
A P
B Q
C R
D S
Volume of oxygen /cm3
Isipadu oksigen /cm3
Time /minutes
Masa/minit
W
X
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45. The following equation shows the complete combustion of propene gas.
Persamaan berikut menunjukkan pembakaran gas propene
C3H6(g) + 9/2 O2(g) → 3CO2(g) + 3H2O(g)
Which of the following statements are true when 1 mol of propene gas is burnt
completely?
[Relative molecular mass : C3H6 =42, O2=32, CO2 =44, H2O= 18, Molar volume of gas
is 22.4 dm3 mol
–1 at S.T.P.]
Yang manakah antara pernyataan berikut adalah benar apabila 1 mol gas propene
terbakar secara lengkap?
[Jisim molekul relatif : C3H8 =42, O2=32, CO2 =44, H2O= 18, Isi padu molar gas 22.4
dm3 mol
–1 pada S.T.P.]
I Complete combustion of 0.1 mol of propene produces 5.4 g of water
Pembakaran lengkap 0.1 mol gas propena menghasilkan 5.4 g air
II Complete combustion of 1 mol of propene gas produces 2 mol of water
Pembakaran lengkap 1 mol gas propene menghasilkan 2 mol air
III Complete combustion of 4.2 g of propene requires 14.4 g of oxygen.
Pembakaran lengkap 4.2 g gas propena memerlukan 14.4 g gas oksigen
IV Complete combustion of 0.1 mol of propene produces 6.72 dm3 carbon dioxide
gas at s.t.p.
Pembakaran lengkap 0.1 mol propena akan menghasilkan 6.72 dm3 gas karbon
dioksida pada s.t.p
A I and II only
B I and IV only
C II and IV only
D I, III and IV
46. Ammonium sulphate, (NH4)2SO4 is an example of a fertilizer.
Calculate the percentage of nitrogen in 1 mole of ammonium sulphate.
[Relative atomic mass: N=14, H=1, S=,32, O=16]
Ammonium sulfat, (NH4)2SO4 adalah satu contoh baja.
Hitungkan peratus nitrogen dalam 1 mol ammonium sulfat.
[Jisim atom relatif: N=14, H=1, S=,32, O=16]
A 12.12 %
B 21.21 %
C 23.23 %
D 31.31 %
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47. Diagram 16 shows the preparation of lead(II) chloride salt.
Rajah 16 menunjukkan persediaan garam plumbum(II) klorida.
Diagram 16
Rajah 16
What is the concentration of the hydrochloric acid needed to react completely with
lead(II) nitrate solution?
Berapakah kepekatan larutan asid hidroklorik yang diperlukan untuk bertindak balas
lengkap dengan larutan plumbum(II) nitrat?
A 0.5 mol dm-3
B 1.0 mol dm-3
C 1.5 mol dm-3
D 2.0 mol dm-3
48. Which of the following food additives can be used to make food stay fresh longer and taste
better?
Antara bahan tambah makanan berikut yang manakah boleh digunakan untuk
mengekalkan kesegaran makanan dan meningkatkan rasanya?
A Sodium benzoate and tartrazine
Natrium benzoat dan tartrazina
B Sodium benzoate and ascorbic acid
Natrium benzoat dan asid askorbik
C Monosodium glutamate and tartrazine
Mononatrium glutamat dan tartrazina
D Ascorbic acid and monosodium glutamate
Asid askorbik dan mononatrium glutamat
50 cm3 of
1.0 mol dm-3
lead(II) nitrate
solution
50 cm3
1.0 mol dm-3
larutan
plumbum(II)
nitrat solution
50 cm3 of
hydrochloric
acid
50 cm3
asid
hidroklorik
+ White
precipitate
Mendakan
putih
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49
Diagram 17 shows the process to produce compound J.
Rajah 17 menunjukkan proses menghasilkan sebatian J.
+
Diagram 17
Rajah 17
Which of the following structural formulas is of compound J?
Antara formula struktur yang manakah bagi sebatian J?
A
B
C
D
O
||
CH3—C—O—CH2—CH3
O
||
CH3—C—O—CH2—CH2—CH3
O
||
CH3—CH2—C—O—CH2—CH3
O
||
CH3—CH2—C—O—CH2—CH2—CH3
Propanol
Propanol
C3H7OH
Compound J
Sebatian J
Ethanoic acid
Asid etanoik
CH3COOH
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50 Diagram 18 shows the set of apparatus of an experiment to investigate electron transfer at
a distance.
Rajah 18 menunjukkan susunan radas satu eksperimen pemindahan elektron pada satu
jarak.
Diagram 18
Rajah 18
Which of the following statements is true about the experiment?
Antara pernyataan berikut yang manakah benar tentang eksperimen itu?
A Iodide ion is the reducing agent
Ion iodida bertindak sebagai agen penurunan.
B Oxidation number of iodine decreases from 0 to -1
Nombor pengoksidaan iodin menurun dari 0 ke -1
C Oxidation number of manganese increases from +2 to +7
Nombor pengoksidaan mangan bertambah dari + 2 ke +7
D Electrons flow from potassium iodide solution to acidified potassium
manganate(VII) through sulphuric acid
Elektron mengalir dari larutan kalium iodida ke larutan kalium mangnanat(VII)
berasid melalui asid sulfurik
END OF QUESTION PAPER
KERTAS SOALAN TAMAT
Acidified potassium
manganate(VII) solution
Larutan kalium
manganat(VII) berasid
G
Carbon electrode
Elektrod karbon
Dilute sulphuric acid
Asid sulfurik cair
Potassium iodide
solution
Larutan kalium
iodida
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NAMA:.................................................... Tingkatan :..............................
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4541/2
Kimia
Kertas 2
Ogos
2008
2 ½ jam
SEKOLAH BERASRAMA PENUH
BAHAGIAN PENGURUSAN
SEKOLAH BERASRAMA PENUH / KLUSTER
KEMENTERIAN PELAJARAN MALAYSIA
PEPERIKSAAN PERCUBAAN SPM 2008
KIMIA Kertas 2
Dua jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
1. Tuliskan nama dan tingkatan pada ruang
yang disediakan.
2. Jawab semua soalan daripada Bahagian A.
Tuliskan jawapan anda dalam ruang yang
disediakan
3. Jawab satu soalan daripada Bahagian B
dan satu soalan daripada Bahagian
C.Jawapan kepada bahagian B dan
Bahagian C hendaklah ditulis pada kertas
tulis.
4. Anda diminta menjawab dengan lebih
terperinci untuk Bahagian B dan Bahagian
C. Jawapan mestilah jelas dan logik.
Persamaan, gambar rajah, jadual, graf dan
cara lain yang sesuai untuk menjelaskan
jawapan anda boleh digunakan.
5. Anda hendaklah menyerahkan kertas tulis
dan kertas tambahan, jika digunakan
bersama-sama dengan kertas soalan.
6. Penggunaan kalkulator saintifik yang tidak
boleh diprogramkan adalah dibenarkan.
Bahagian Soalan Markah
penuh
Markah
diperoleh
A
1 10
2 10
3 10
4 10
5 10
6 10
B 7 20
8 20
C
9 20
10 20
Jumlah
Kertas soalan ini mengandungi 19 halaman bercetak
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2
Section A
[60 marks]
Answer all questions.
1. Table 1 shows the number of proton, electrons and neutrons for atom W, X, Y and Z.
Jadual 1 menunjukkan bilangan proton, elektron dan neutron bagi atom W, X, Y dan Z.
Atom Number of protons
Bilangan proton
Number of neutrons
Bilangan neutron
W 8 9
X 8 10
Y 12 12
Z 11 12
Table 1
Jadual 1
(a) (i) What is meant by nucleon number?
Apakah yang dimaksudkan dengan nombor nukleon?
................................................................................................................
[ 1 mark]
(ii) What is the nucleon number of atom W ?
Apakah Nombor Nukleon bagi atom W ?
………………………………………………………………………..
[ 1 mark]
(b) Write the symbol of atom Y in the form of YA
Z .
Tuliskan simbol bagi atom Y dalam bentuk YA
Z .
.......................................................................................................................
[ 1 mark]
(c) (i) Write the electron arrangement of atom Z.
Tuliskan susunan electron bagi atom Z.
.............................................................................................................
[ 1 mark]
(ii) What is the number of valance electrons in atom Z.
Apakah bilangan electron valen bagi atom Z.
.............................................................................................................
[ 1 mark]
(d) Which atoms are isotopes? Explain why.
Atom-atom yang manakah adalah isotop? Jelaskan mengapa.
......................................................................................................................
......................................................................................................................
[ 2 marks]
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(e) Solid Q is a compound of element W. Solid Q has melting point of 85 0C and
boiling point of 150 0C. A boiling tube containing solid Q is heated at room
temperature until 180 0C.
Pepejal Q ialah satu sebatian daripada unsur W. Pepejal Q mempunyai takat
lebur pada 85 0C dan takat didih pada 150
0C. Sebuah tabung didih yang
mengandungi pepejal Q telah dipanaskan daripada suhu bilik sehingga 180 0C.
(i) Sketch a graph of temperature against time during the heating.
Lakarkan satu graf suhu melawan masa bagi pemanasan tersebut.
[ 2 marks]
(ii) Draw the arrangement of particles of substance Q at 50 OC.
Lukiskan susunan zarah-zarah bahan Q pada 50 oC.
[ 1 mark]
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2 Diagram 2 shows the set up of apparatus to investigate the electrolysis of silver nitrate solution
with carbon electrodes and copper(II) sulphate solution with copper electrodes.
Rajah 2 menunjukkan susunan radas bagi satu eksperimen untuk mengkaji elektrolisis larutan
argentum nitrat dengan elektrod karbon dan elektrolisis larutan kuprum(II) sulfat dengan
elektrod-elektrod kuprum.
Cell 1 Cell 2
Sel 1 Sel 2
Diagram 2
Rajah 2
(a) What is the energy change in electrolysis?
Apakah perubahan tenaga dalam elektrolisis?
………………………………………………………………………………………………
[ 1 mark]
(b) Write the formulae of all the ions present in silver nitrate solution.
Tuliskan formula bagi semua ion yang terdapat dalam larutan argentum nitrat.
...............................................................................................................................................
[ 1 marks]
(c) In the electrolysis of Cell 1
Dalam elektrolisis Sel 1
(i) What is the observation at electrode B?
Apakah pemerhatian pada elektrod B?
…………………………………………………………………………………….
[ 1 mark]
(ii) Write the half equation for the reaction at electrode B.
Tulis persamaan setengah yang berlaku pada elektrod B.
……………………………………………………………………………………
[ 1 mark]
A
Copper electrode
Elektrod kuprum
Copper(II) sulphate
solution
Larutan kuprum(II)
sulfat
Carbon electrode
Elektrod karbon
Silver nitrate solution
Larutan argentum
nitrat
A B C D
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(d) In the electrolysis of Cell 2.
Dalam elektrolisis Sel 2.
(i) What is the observation at electrode C?
Apakah pemerhatian pada elektrod C?
…………………………………………………………………………………….
[1 mark]
(ii) Write the half equation for the reaction at electrode C.
Tulis persamaan setengah yang berlaku pada elektrod C.
……………………………………………………………………………………
[1 mark]
(e ) What are the processes that occur at electrodes A and D?
Apakah proses yang berlaku pada elektrod A dan D?
Electrode A :……………………………………………………………………………
Electrode D :……………………………………………………………………………
[2 marks]
(f ) State which cell the concentration of electrolyte remains unchanged.
Nyatakan sel manakah kepekatan elektrolitnya tidak berubah.
…………………………………………………………………………………..............…
[1 mark]
(g ) State one application of electrolysis in industrial.
Nyatakan satu aplikasi elektrolisis dalam industri..
…………………………………………………………………………………..............…
[1 mark]
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3 Diagram 3 shows a series of reactions of lead(II) carbonate.
Rajah 3 menunjukkan satu siri tindak balas bagi plumbum(II) karbonat.
(a) (i) Name the solid P.
Namakan pepejal P.
……………………………………………………………..………………………
[1 mark ]
(ii) Draw a labelled diagram of the set up of apparatus can be used to produce solid P and
to identify gas Q in step I.
Lukiskan gambar rajah berlabel bagi susunan radas yang boleh digunakan untuk
menghasilkan pepejal P dan mengenalpasti gas Q dalam langkah I
[2 marks ]
Lead(II) carbonate
Plumbum(II) karbonat
Solid P
Pepejal P
Colourless gas Q
Gas tidak berwarna Q
Solution R
Larutan R
Precipitate X
Mendakan X
Heat
Panaskan
dilute nitric acid
asid nitrik cair
Potassium iodide solution
Larutan kalium iodida
+
Diagram 3
Rajah 3
I
II
III
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(iii) Write the chemical equation for the decomposition of lead(II) carbonate when
heated.
Tuliskan persamaan kimia bagi penguraian plumbum(II) karbonat apabila
dipanaskan.
.........………………………………………………………………………………
[1 mark ]
(iv) 13.35 g lead(II) carbonate is heated to decompose completely, calculate the
volume of gas Q produced at room condition.
13.35 g plumbum(II) karbonat dipanaskan sehingga terurai lengkap, hitungkan
isi padu gas Q yang terhasil pada keadaan bilik.
[Relative atomic mass: Pb= 207, C=12, O=16 and 1 mol of gas occupies 24 dm3
at room condition]
[Jisim atom relartif : Pb= 207, C=12, O=16 dan 1 mol gas menempati 24 dm3
pada keadaan bilik]
[2 marks ]
(b) (i) Name the precipitate X.
Namakan mendakan X.
…………………………………………………………………………………….
[1 mark ]
(ii) State the colour of precipitate X.
Nyatakan warna mendakan X.
……………………………………………………………………………………
[1 mark ]
(iii) Write the ionic equation for the formation of precipitate X.
Tuliskan persamaan ion bagi pembentukan mendakan X.
.……………………………………………………………………………………
[1 mark ]
(iv) How to obtain precipitate X from the mixture.
Bagaimanakah mendakan X diasingkan daripada campuran.
.……………………………………………………………………………………
[1 mark ]
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4. Two experiments were carried out to investigate factors that affect the rate of reaction. Table 4
shows the description of each experiment.
Dua eksperimen telah dijalankan untuk menentukan faktor yang mempengaruhi kadar suatu
tindak balas. Jadual 4 menunjukkan perincian setiap eksperimen.
Experiment
Eksperimen
Reactant
Bahan tindak balas
Temperature, oC
Suhu, 0C
Total volume of gas
collected at 2
minutes (cm3)
Jumlah isi padu gas yang
dikumpulkan dalam 2
minit (cm3)
I
Excess zinc powder + 20 cm3
of 0.1 mol dm-3
sulphuric
acid
Serbuk zink berlebihan +
20 cm3 of 0.1 mol dm
-3 asid
sulfurik
30 20.0
II
Excess zinc powder + 20 cm3
of 0.1 mol dm-3
sulphuric
acid + copper(II) sulphate
solution
Serbuk zink berlebihan + 20
cm3 of 0.1 mol dm
-3 asid
sulfurik+ larutan kuprum(II)
sulfat
30 32.0
Table 4
Jadual 4
(a) Draw a diagram of the set-up of apparatus to carry out this experiment.
Lukis gambar rajah untuk menunjukkan susunan radas yang digunakan dalam
eksperimen ini.
[2 marks]
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(b) Write the chemical equation for the reaction between zinc and sulphuric acid.
Tuliskan persamaan kimia bagi tindak balas zink dan asid sulfurik.
................................................................................................................................
[ 1 mark]
(c) Calculate the average rate of the reaction for the first two minutes of experiment I
and experiment II in cm3 s
-1.
Hitung kadar tindak balas purata bagi dua minit pertama untuk eksperimen I
dan eksperimen II dalam cm3 s
-1.
Experiment I
Eksperimen I
Experiment II
Eksperimen II
[ 2 marks]
(d) Calculate the maximum volume of gas produced in experiment II.
Hitungkan isipadu maksimum gas yang dibebaskan dalam eksperimen II.
[1 mol of gas occupies 24 dm3 at room condition]
[1 mol gas menempati 24 dm3 pada keadaan bilik]
[ 2 marks]
(e) Compare the rate of reaction between experiment I and experiment II, explain
why there is a difference in the rate of reaction based on the collision theory.
Bandingkan kadar tindak balas antara eksperimen I dan II, terangkan perbezaan
dalam kadar tindak balas menggunakan teori perlanggaran.
..................................................................................................................................
..................................................................................................................................
.................................................................................................................................
[ 3 marks]
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5 Table 5 shows molecular formulae of 4 carbon compounds.
Jadual 5 menunjukkan formula molekul bagi 4 sebatian karbon.
Compound
Sebatian
Molecular Formula
Formula molekul
A C4H8
B C4H10
C C4H9OH
D C2H5COOH
Table 5
Jadual 5
(a) Write the general formula of the homologous series of compound B.
Tuliskan formula umum bagi siri homolog sebatian B.
……..………………………………………………………………………………………
[1 mark]
(b) State the functional group of compound A and compound D
Nyatakan kumpulan berfungsi bagi sebatian A dan sebatian D.
Compound A : …………………………………………………………………………..
Sebatian A
Compound D : …………………………………………………………………………..
Sebatian D
[2 marks]
(c) Compound B shows isomerism. Draw the structural formula of all isomers of compound B.
Sebatian B menunjukkan isomerisme. Lukiskan formula struktur bagi semua isomer
sebatian B.
[2 marks]
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(d) Compound D and compound C are reacted with the presence of the concentrated
sulphuric acid.
Sebatian D dan sebatian C bertindak balas dengan kehadiran asid sulfurik pekat.
(i) Name the product formed from the reaction.
Namakan hasil yang terbentuk daripada tindak balas
……………………………………………………….……………………………
[1 mark]
(ii) State one special characteristic of the product formed.
Nyatakan satu ciri istimewa bagi hasil yang terbentuk
……………………………………………………….……………………………
[1 mark]
(e) Compound A burns in excess oxygen to produce carbon dioxide and water.
Sebatian A dibakar dalam oksigen berlebihan menghasilkan carbon dioksida dan air.
(i) Write a balanced chemical equation for the reaction.
Tuliskan persamaan kimia seimbang bagi tindak balas tersebut
..................................................................................................................................
[1 mark]
(ii) 11.2 g of compound A burns in excess oxygen, calculate number of carbon
dioxide molecules formed.
11.2 g sebatian A dibakar dalam oksigen berlebihan, hitungkan bilangan molekul
carbon dioksida yang terbentuk.
[Relative atomic mass C = 12, O = 16 and Avogadro number = 6.03 x 1023
]
[Jisim atom relatif C = 12, O = 16 dan nombor Avogadro = 6.03 x 1023
]
[2 marks]
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6 Diagram 6 shows the apparatus set-up for an experiment to determine the heat of displacement of
copper.
Rajah 6 menunjukkan susunan radas bagi satu eksperimen untuk menentukan haba penyesaran
kuprum.
The following data was obtained:
Data berikut diperolehi
(a) What is meant by the ‘heat of displacement’?
Apakah yang dimaksudkan dengan ‘haba penyesaran’?
......…………………………………………………………………………….....…………
[1 mark]
(b) Other than increased in the temperature, state another two observations in the experiment.
Selain daripada kenaikan suhu, nyatakan dua pemerhatian lain dalam eksperimen ini.
………………………………………………………………………………………………
………………………………………………………………………………………………
[2 marks]
Initial temperature of copper(II) sulphate solution = 28
oC
Suhu awal larutan kuprum(II) sulfat
Highest temperature of the mixture of product = 36oC
Suhu tertinggi hasil campuran
Diagram 6
Rajah 6
5 g of zinc powder
5 g sebuk zink
50 cm3 of 0.2 mol dm
-3
copper(II) sulphate solution
50 cm3 larutan kuprum(II) sulfat
0.2 mol dm-3
Plastic cup
Cawan plastik
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(c) Why is a plastic cup used in the experiment?
Mengapakah cawan plastik digunakan dalam eksperimen tersebut?
………………………………………………………………………………………………
[1 mark]
(d) Write the ionic equation for the reaction.
Tuliskan persamaan ion bagi tindak balas tersebut.
...............……………………………………………………………………………………
[1 mark]
(e) Based on the information given in the experiment, calculate;
Berdasarkan kepada maklumat diberi dalam eksperimen, hitungkan;
(i) the heat given out in the experiment
haba yang terbebas dalam eksperimen tersebut
[Specific heat capacity of solution = 4.2 J g-1 o
C-1
, density of solution = 1 g cm-3
]
[Muatan haba tentu larutan = 4.2 J g-1 o
C-1
, ketumpatan larutan = 1 g cm-3
]
[1 mark ]
(ii) the heat of displacement of copper
haba penyesaran kuprum
[2 marks]
(f) Draw the energy level diagram for the reaction.
Lukiskan gambar rajah aras tenaga bagi tindak balas tersebut
[2 marks ]
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Section B
[20 marks]
Answer any one question.
7 (a) Aeroplane is made from an alloy of aluminium.
What is the name of this alloy? Explain why the low density aluminium is not
suitable for building aeroplane.
Kapalterbang dibuat daripada sejenis aloi bagi aluminium.
Apakah nama bagi aloi itu? Terangkan mengapa aluminium yang berketumpatan rendah
tidak sesuai untuk pembinaan kapal terbang.
[3 marks]
(b) Bronze is an alloy of copper. Diagram 7.1 shows the arrangement of atoms in pure
copper and bronze.
Gangsa ialah sejenis aloi bagi kuprum. Diagram 7.1 menunjukkan susunan atom dalam
kuprum tulen dan gangsa.
Diagram 7.1
Rajah 7.1
(i) Name the atom X.
Namakan atom X.
[ 1 mark]
(ii) Explain why bronze is harder than pure copper.
Terangkan mengapa gangsa lebih keras daripada kuprum tulen.
[6 marks]
Copper atom
Atom kuprum Atom X
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(c) Diagram 7.2 shows the structure of anion parts of a soap and a detergent. These anions
consist of part A and part B as shown in the diagram 7.2
Diagram 7.2 menunjukan struktur bagi bahagian anion bagi satu sabun dan satu
detergen. Anion-anion ini terdiri daripada bahagian A dan bahagian B seperti
ditunjukan dalam diagram 7.2
Part A Part B
Diagram 7.2
Rajah 7.2
(i) Name part A and part B of the anions.
State the solubility of part A and part B in the cleansing action.
Namakan bahagian A dan bahagian B dalam anion itu.
Nyatakan keterlarutan bahagian A dan bahagian B dalam tindakan
pembersihan.
[4 marks]
(iii) Compare the effectiveness of the cleansing action of the two anions shows in the
diagram 7.2 in hard water. Explain your answer.
Write an ionic equation to show the reaction of anion of soap in hard water.
Bandingkan keberkesanan bagi tindakan pembersihan dua anion yang
ditunjukkan dalam diagram 7.2 dalam air liat. Terangkan jawapan anda.
Tulis satu persamaan ion bagi tindak balas anion bagi sabun dalam air liat.
[6 marks]
Anion of a soap
Anion of a detergent
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8. Table 8 shows the proton number of atoms of elements W, X, Y and Z.
Jadual di bawah menunjukkan nombor proton bagi unsur-unsur W, X, Y dan Z.
Element
Unsur
Proton Number
Nombor proton
W 1
X 3
Y 6
Z 8
Table 8
Jadual 8
(a) State the arrangement of elements X, Y and Z in the order of increasing atomic radius.
Explain your answer.
Nyatakan susunan bagi unsur-unsur X, Y dan Z mengikut jejari atom menaik
Terangkan jawapan anda.
[4 marks]
(b) The reaction between elements X and Y form a chemical compound.
Explain the formation of this compound.
Tindak balas antara unsur –unsur X dan Y membentuk suatu sebatian kimia.
Terangkan pembentukan sebatian ini.
[6 marks]
(c) The reaction between elements Z and W form another chemical compound.
Tindak balas antara unsur –unsur Z dan W membentuk sebatian kimia lain.
(i) Draw the electron arrangement of the compound formed.
Lukiskan susunan elektron bagi sebatian yang terbentuk.
[2 marks]
(ii) Compare two physical properties below for the compounds formed in (b) and (c).
Melting point
Electric conductivity.
Explain the differences in each physical property.
Bandingkan sifat fizikal di bawah bagi sebatian-sebatian di (b) dan (c)
Takat lebur
Kekonduksian elektrik
Terang perbezaan dalam setiap sifat fizikal tersebut.
[8 marks]
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Section C
[20 marks]
Answer any one question.
9 (a) Diagram 9 shows the set up of the apparatus to determine the empirical formula of oxide
of metal M. M is less reactive than hydrogen.
Diagram 9 menunjukkan susunan radas untuk menentukan formula empirik oksida logam
M. M kurang reaktif daripada hidrogen
Diagram 9
Rajah 9
(i) State two precautions that must be taken in Part A while carrying out the
experiment.
Nyatakan dua langkah berjaga-jaga yang perlu diambil di Bahagian A semasa
menjalankan eksperimen tersebut?
[2 marks]
(ii) Suggest a suitable chemical substance for X in Part B and state the function of X.
Cadangkan satu bahan kimia yang sesuai bagi X di Bahagian B dan nyatakan
fungsi X.
[2 marks]
(iii) Describe the reaction that occurs in Part C.
Huraikan tindak balas yang berlaku di Bahagian C.
[2 marks]
Dilute
hydrochloric acid
Asid hidroklorik
cair
Thistle funnel
Corong tisel
X
Heat
Panaskan
Oxide of metal M
Oksida logam M
Dry hydrogen
Hidrogen kering
Part A
Bahagian A
Part B
Bahagian B
Part C
Bahagian C
Zinc
Zink
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(iv) Information below shows the results of the experiment.
Maklumat di bawah menunjukkan keputusan bagi eksperimen tersebut.
Determine the empirical formula of the oxide of M:
Tentukan formula empirik oksida M
[Relative atomic mass of O =16 , M = 207 ]
[Jisim atom relatif O =16 , M = 207 ]
[4 marks]
(b) The information below is about hydrocarbon J
Maklumat di bawah adalah berkaitan dengan hidrokarbon J
Empirical formula of J is CH2
Formula empirik J ialah CH2
Mass of 1 mole of J = 28 g
Jisim 1 mol J = 28 g
Produce by dehydration of alcohol
Dihasilkan melalui pendehidratan alkohol
(i) Determine the molecular formula for hydrocarbon J.
[Relative atomic mass of C =12 , H = 1 ]
Tentukan formula molekul bagi hidrokarbon J
[Jisim atom relatif C =12 , H = 1 ]
[2 marks]
(ii) Describe an experiment to prepare hydrocarbon J in the laboratory from its corresponding
alcohol. In your answer, include the diagram of the appratus set-up, materials used, and
procedure.
Huraikan satu eksperimen untuk menyediakan hidrokarbon J di makmal daripada
alkohol yang sepadan. Dalam jawapan anda, hendaklah termasuk gambar rajah susunan
radas, bahan dan prosedur.
[8 marks]
Mass of combustion tube + porcelain dish = 52.34 g
Jisim tabung pembakaran + piring porselin
Mass of combustion tube + porcelain dish + oxide of M = 105.86 g
Jisim tabung pembakaran + piring porselin + oksida M
Mass of combustion tube + porcelain dish + M = 102.02 g
Jisim tabung pembakaran + piring porselin + M
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10 (a) Define oxidation and reduction in terms of tranfer of electrons.
Takrifkan pengoksidaan dan penurunan dari segi pemindahan elektron.
[2 marks]
(b) The chemical equation below shows the reaction between metal W and copper(II) nitrate
solution , Cu(NO3)2.
Persamaan kimia di bawah menunjukkan tindak balas kimia antara logam W dengan
larutan kuprum(II) nitrat.
W(s) + Cu(NO3)2 (aq) → Cu (s) + W(NO3)2(aq)
(i ) Suggest a metal of W.
Cadangkan satu logam bagi W.
[1 mark]
(ii) State three information from the above equation which are related to the position of
metal W and copper, Cu in the electrochemical series of metal.
Nyatakan tiga maklumat yang boleh disimpulkan dari persamaan di atas yang berkaitan
dengan kedudukan logam W dan Z dalam siri elektrokimia.
[3 marks]
(iii) Based on the above equation, explain the redox reaction in term of the change of
oxidation number .
Dengan merujuk pada tindak balas di atas, terangkan maksud tindak balas redoks dari
segi perubahan nombor pengoksidaan.
[4 marks]
(c)
You are provided with oxide of metal X (XO), oxide of metal Y (Y2O3), carbon powder and
apparatus needed. Describe an experiment to verify the above statement.
Your answer should consist of the following:
Diagram showing the set up of apparatus
Procedure of the experiment
Observation
Chemical equation.
Anda dibekalkan dengan oksida logam X (XO), oksida logam Y (Y2O3), serbuk karbon dan
radas-radas yang diperlukan. Dengan bantuan gambarajah huraikan eksperimen untuk
mengesahkan kenyataan di atas adalah benar. Jawapan anda mesti melibatkan segala
pemerhatian dan persamaan tindakbalas yang sewajarnya.
Gambar rajah menunjukkan susunan radas
Prosedur eksperimen
Pemerhatian
Persamaan kimia.
[10 marks]
END OF QUESTION PAPER
KERTAS SOALAN TAMAT
The position of carbon is above metal X and below metal Y in the Reactivity Series of metal.
Kedudukan karbon adalah di atas logam X dan di bawah logam Y dalam Siri Kereaktifan logam
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Name :………………………………………………………… Class: ………….………
SEKOLAH BERASRAMA PENUH
BAHAGIAN PENGURUSAN
SEKOLAH BERASRAMA PENUH/KLUSTER
KEMENTERIAN PELAJARAN MALAYSIA
_______________________________________________
PEPERIKSAAN PERCUBAAN SPM 2008
KIMIA
KERTAS 3
Satu jam tiga puluh minit
JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU
1. Tuliskan nama dan tingkatan anda pada
ruangan yang disediakan.
2. Kertas soalan ini adalah dalam
dwibahasa.
3. Soalan dalam Bahasa Inggeris
mendahului soalan yang sepadan dalam
Bahasa Melayu.
4. Calon dikehendaki membaca maklumat
di halaman 2 kertas soalan ini.
Untuk Kegunaan Pemeriksa
Soalan Markah
Penuh
Markah
Diperoleh
1 15
2 18
3 17
Jumlah 50
Kertas soalan ini mengandungi 10 halaman bercetak
4541/3
KIMIA
Kertas 3
Ogos
2008
1½ Jam
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INFORMATION FOR CANDIDATES
MAKLUMAT UNTUK CALON
1. This question paper consists of three questions. Answer all questions.
Kertas soalan ini mengandungi tiga soalan. Jawab semua soalan.
2. Write your answers for Question 1 and Question 2 in the spaces provided in the
question paper.
Tuliskan jawapan bagi Soalan 1 dan Soalan 2 dalam ruang yang disediakan
dalam kertas soalan.
3. Write your answers for Question 3 on the lined pages at the end of the question
paper in detail. You may use equations, diagrams, tables, graphs and any other
suitable methods to explain your answer.
Tuliskan jawapan bagi Soalan 3 pada halaman bergaris di bahagian akhir kertas
soalan ini 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 you have done.
Then write down the new answer.
Sekiranya anda hendak menukar jawapan, batalkan jawapan yang telah dibuat.
Kemudian tulis jawapan yang baru.
6. Diagrams in the questions are not drawn to scale unless stated.
Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan
sebaliknya.
7. Marks allocated for each question or part questions are shown in brackets.
Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan
dalam kurungan.
8. Time suggested for answering Question 1 and Question 2 is 45 minutes and
Question 3 is 45 minutes.
Masa yang dicadangkan untuk menjawab Soalan 1 dan Soalan 2 ialah 45 minit
dan Soalan 3 ialah 45 minit.
9. You may use a non-programmable scientific calculator.
Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh
diprogramkan.
10. Hand in this question paper at the end of the examination.
Serahkan semua kertas jawapan anda di akhir peperiksaan.
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Marks awarded:
Mark
Description
3
Excellent: The best response
2
Satisfactory : An average answer
1
Weak : An inaccurate response
0
No response or wrong response
Pemberian Markah:
Skor Penerangan
3 Cemerlang: Respons yang paling baik
2 Memuaskan: Respons yang sederhana
1 Lemah: Respons yang kurang tepat
0 Tiada respons atau respons salah
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1
3
Answer all questions.
Jawab semua soalan.
1. A student carried out an experiment to determine the end-point for the titration of 25.0
cm3 of 1.0 mol dm
-3 sodium hydroxide solution with 1.0 mol dm
-3 hydrochloric acid.
Phenolphthalein is used as the acid-base indicator.
Table 1 shows the three titrations that were conducted and the magnification of the
burette readings.
Seorang pelajar menjalankan satu eksperimen untuk menentukan takat akhir untuk
titratan diantara 25 cm3 1.0 mol dm
-3 larutan natrium hidroksida dengan 1.0 mol dm
-3
asid hidroklorik. fenolftalein digunakan sebagai penunjuk asid – bes.
Jadual 1 menunjukkan tiga bacaan titratan yang dijalankan dan pembesaran bacaan
buret.
Titration No.
No. Titratan I II III
Initial burette
reading
Bacaan awal
buret
1
2
…………………..
13
14
……………….
26
27
………………..
Final burette
reading
Bacaan akhir
buret
13
14
……………………
26
27
……………………
38
39
…………………….
Table 1
Jadual 1
For
examiner’s use
hydrochloric
acid
asid
hidroklorik
hydrochloric
acid
asid
hidroklorik
hydrochloric
acid
asid
hidroklorik
hydrochloric
acid
asid
hidroklorik
hydrochloric
acid
asid
hidroklorik
hydrochloric
acid
asid
hidroklorik
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(a) Record the burette readings for the three titrations in the space provided in Table 1.
Rekodkan bacaan buret untuk ketiga-tiga titratan di ruang yang disediakan dalam Jadual 1.
[3 marks]
(b) Construct a table and record the initial burette reading, final burette reading and the volume of
acid used for each titration.
Bina satu jadual dan rekodkan bacaan awal buret, bacaan akhir buret dan isipadu asid yang
digunakan untuk setiap titratan.
[3 marks]
(c) Calculate the average volume of hydrochloric acid used in the experiment.
Hitungkan purata isipadu asid hidroklorik yang digunakan dalam eksperimen
tersebut.
[3 marks]
(d) If the experiment is repeated by replacing 1.0 mol dm-3
of hydrochloric acid with 1.0 mol dm-3
of sulphuric acid, predict the end-point of the titration.
Jika eksperimen itu diulang dengan menggantikan 1.0 mol dm-3
asid hidroklorik dengan 1.0
mol dm-3
asid sulfurik, ramalkan takat akhir titratan.
.
………………………………………...…………………………………………………………
[3 marks]
1(a)
For
examiner’s use
1(c)
1(d)
1(b)
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(e) Acids can be classified into strong acid and weak acid.
Classify the following acids into strong acids and weak acids.
Asid boleh diklasifikasi sebagai asid kuat dan asid lemah.
Klasifikasikan asid-asid berikut kepada asid kuat dan asid lemah.
[3 marks]
.
1(e)
Ethanoic acid, hydrochloric acid, phosphoric acid,
carbonic acid, nitric acid
Asid etanoik, asid hidroklorik, asid fosforik,
asid karbonik , asid nitrik
For
examiner’s use
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2. Elements in Group 1 of the Periodic Table of Elements can react with water at different rate
of reactivity. Table 2 shows the experiment and observations to compare the reactivity of
lithium, sodium and potassium with water.
Unsur Kumpulan 1 dalam Jadual Berkala Unsur boleh bertindak balas dengan air pada
kadar kereaktifan yang berbeza. Jadual 2 di bawah menunjukkan eksperimen dan
pemerhatian untuk membandingkan kereaktifan tindak balas antara litium, natrium dan
kalium dengan air.
Experiment
Eksperimen
Observation
Pemerhatian
lithium
litium
water
air
Lithium moves slowly on the water surface.
The solution formed turns red litmus paper to
blue
Litium bergerak perlahan di atas permukaan
air. Larutan yang terhasil menukarkan kertas
litmus merah ke biru.
Sodium
natrium
water
air
Sodium moves faster and randomly on the
surface of the water with a ‘hissing’ sound.
Ignites with a yellow flame. The solution
formed turns red litmus paper to blue.
Natrium bergerak laju dan secara rawak di
atas permukaan air dengan bunyi ‘hiss’.
Menyala dengan nyalaan kuning. Larutan
terhasil menukarkan kertas litmus merah ke
biru.
Potassium
kalium
water
air
Potassium moves vigorously and randomly on
the water surface. Ignites with a lilac flame and
produces a ‘pop’ sound. The solution formed
turns red litmus paper to blue.
Kalium bergerak lebih laju dan secara rawak
di atas permukaan air. Menyala dengan
nyalaan ungu dan menghasilkan bunyi ‘pop’.
Larutan yang terhasil menukarkan kertas
litmus merah ke biru.
Table 2
Jadual 2
For
examiner’s
use
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(a) Based on the experiment above, state
Berdasarkan eksperimen di atas, nyatakan
(i) the manipulated variable.
pemboleh ubah yang dimanipulasikan.
…………………………………………………………………………………………..
(ii) the responding variable.
pemboleh ubah yang bergerak balas.
………………………………………………………………………………………….
(iii) the fixed variable.
pemboleh ubah yang di tetapkan.
……………………………………………………………………………………………..
[3 marks]
(b) State the hypothesis for the experiment above.
Nyatakan hipotesis bagi eksperimen di atas.
………………………………………………………………………………………
………………………………………………………………………………………
........…………………………………………………………………………………
[3 marks]
(c) State the operational definition for the reactions that take place.
Nyatakan definisi secara operasi bagi tindak balas yang berlaku..
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
[3 marks]
2(a)
For
examiner’s
use
2(b)
2(c)
For examiner’s
use
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(d) After each experiment, a pH meter is dipped into the solution in the basin. The pH value
of the solution is 13.
Selepas setiap eksperimen, meter pH di celupkan ke dalam larutan dalam besen. Nilai
pH larutan tersebut ialah 13
State the inference for the observation.
Nyatakan inferens bagi pemerhatian tersebut.
………………………………………………………………………………………
………………………………………………………………………………………
[3 marks]
(e) Based on the observations in the experiment above, state the relationship between the
position of the elements in Group 1 of the Periodic Table of Elements with the reactivity
of the elements towards water.
Berdasarkan pemerhatian-pemerhatian dalam eksperimen di atas, nyatakan hubungan
antara kedudukan unsur-unsur Kumpulan 1 dalam Jadual Berkala Unsur dengan
kereaktifan unsur-unsur tersebut bertindak balas dengan air.
………………………………………………………………………………………
………………………………………………………………………………………
………………………………………………………………………………………
[3 marks]
(f) Rubidium is located below potassium in Group 1 of the Periodic Table of Elements.
Arrange rubidium and the three elements in the experiment above in the descending order
of reactivity of the elements in the reaction with water.
Rubidium terletak di bawah kalium dalam Kumpulan 1 Jadual Berkala Unsur. Susunkan
rubidium dan unsur-unsur dalam eksperimen di atas mengikut susunan kereaktifan
menurun unsur-unsur bertindak balas tersebut dengan air.
………………………………………………………………………………………
[3 marks]
2(d)
2(e)
2(f)
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Ethanol Propanol Butanol
3. Diagram 3 shows spirit lamps that contain different types of alcohols.
Rajah 3 menunjukkan pelita yang mengandungi jenis-jenis alkohol yang berlainan.
Diagram 3
Rajah 3
Different types of alcohols produce different heat of combustions. When the number of carbon
per molecule of the alcohol increases the heat of combustion increases Table 3 shows the heat of
combustion of ethanol, propanol and butanol.
Jenis-jenis alkohol yang berlainan menghasilkan haba pembakaran yang berlainan. Apabila
bilangan karbon per molekul alkohol bertambah haba pembakaran bertambah. Jadual 3
menunjukkan haba pembakaran bagi etanol, propanol dan butanol.
Alcohol
Alkohol
Molecular formula
Formula molekul
Heat of combustion/kJ mol-1
Haba pembakaran/kJ mol-1
Ethanol C2H5OH - 1376
Propanol C3H7OH - 2016
Butanol C4H9OH - 2678
Table 3
Jadual 3
Plan an experiment to compare the heat combustion of the alcohols.
Rancang satu eksperimen untuk membandingkan haba pembakaran alkohol-alkohol tersebut.
Your planning should include the following aspects:
Perancangan anda haruslah mengandungi aspek berikut:
(a) Statement of the problem
Pernyataan masalah
(b) All the variables
Semua pembolehubah
(c) Statement of the hypothesis
Pernyataan hipotesis
(d) List of substance and apparatus
Senarai bahan dan alat radas
(e) Procedure of the experiment
Prosedur eksperimen
(f) Tabulating data
Penjadualan data
[17 marks]
END OF QUESTION PAPER
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SULIT 1
BAHAGIAN PENGURUSAN
SEKOLAH BERASRAMA PENUH / KLUSTER
KEMENTERIAN PELAJARAN MALAYSIA
CHEMISTRY
TRIAL-EXAM
SPM 2008
MARKING SCHEME
PAPER 1
PAPER 2
PAPER 3
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SULIT 2
Paper 1
1 C 26 D
2 D 27 C
3 B 28 C
4 B 29 D
5 C 30 C
6 C 31 C
7 C 32 B
8 A 33 B
9 D 34 C
10 A 35 D
11 B 36 B
12 D 37 B
13 D 38 D
14 D 39 B
15 A 40 D
16 C 41 A
17 D 42 A
18 A 43 A
19 A 44 C
20 C 45 D
21 A 46 B
22 C 47 D
23 C 48 D
24 B 49 B
25 B 50 A
Paper 1 (50) + Paper 2 (100)+ Paper3 (50) X 100%
200
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SULIT 3
Kertas 2-Bahagian A
1 (a) (i) nucleon number is the total number of protons and neutrons in its atom.
Reject : neutrons numbers
1
(ii) 17 1
(b) Y24
12 1
(c) (i) 2.8.1 1
(ii) 1 1
(d) W and X
Atoms W and X have same proton number/ number of proton but difference
nucleon number/ number of neutron
1
1
(e) (i)
- Shape of curve
- Mark of the melting and boiling points
1
1
(ii)
or
-Minimum three layers.
-No overlapping
-All particles must touch each other
1
Total 10
Time/ s
Temperature/0C
150
85
180 _
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SULIT 4
2 (a)
Electrical (energy) to chemical (energy)
1
(b) Ag+ , H
+/H3O
+ , NO3
- , OH
-
Pelajar suka jawab Ag2+
1
(c) (i) Shiny grey / silvery grey solid deposited 1
(ii) Ag+ + e Ag 1
(d) (i) Becomes thinner / size becomes smaller / mass decreases
r : corrode
1
(ii) Cu → Cu2+
+ 2e 1
(e) A : Oxidation
D : Reduction
1
1
(f) Cell 2 // copper (II) sulphate solution 1
(g) Electroplating /purification of metals/extraction of metals 1
Total 10
No. Rubric Mark
3 (a) (i)
(ii)
(iii)
(iv)
(c) (i)
(ii)
(iii)
(iv)
Lead(II) oxide
1. Diagram of set up of apparatus complete and functional
2. Label
PbCO3 → PbO + CO2
1. Mole of PbCO3 = 267
35.13
= 0.05 mol
2. Volume of CO2 = (0.05)(24)
= 1.2 dm3 or 1200 cm
3
Lead(II) iodide // Lead iodide
Yellow
Pb2+
+ 2I- → PbI2
Filter the mixture
1
1
1
1
1
1
1
1
1
1 ...10
Lime water
Lead(II)
oxide
Heat
SULIT 5
4 (a)
Complete set of apparatus and can be used and label
1 + 1
(b) Zn + H2SO4 → ZnSO4 + H2 1
(c) Experiment I =
120
20 // 0.167 // 0.17 cm
3 s
-1
Experiment II = 120
32 // 0.267 // 0.27 cm
3 s
-1
1
1
(d) Number of moles of H2SO4 =
1000
201.0 x = 0.002 mol
1 mol of H2SO4 produce 1 mol of H2
0.002 mol of H2SO4 produce 0.002 mol of H2
Maximum volume of H2 = 0.002 x 24 000 = 0.048 dm3 // 48 cm
3
1
1
(e) The rate of reaction in experiment II is higher than that of experiment
I.
Copper(II) sulphate solution lowers the activation energy of the
reaction in experiment II. // As catalyst
The frequency of effective collisions between hydrogen ions and zinc
atoms increases in experiment II.
1
1
1
Total 10
No
Marking scheme Mark
5(a) CnH2n + 2
n = 1, 2, 3, .....
1
(b)
| |
A : carbon-carbon double bond // - C = C –
B : carboxyl group // - COOH
1
1
Sulphuric acid Water
Zinc powder
SULIT 6
(c)
1
1
(d) (i)
(ii)
Butyl propanoate
Sweet / pleasant /fragrance / fruity smell
1
1
(e) (i)
(ii)
C4H8 + 6O2 → 4CO2 + 4H2O
mol A = 11.2 // 0.2 mol
56
1 mol A 4 mol CO2
0.2 mol A 0.8 mol CO2
mol CO2 = 4 x 0.2 // 0.8 mol
No of molecule CO2 = 0.8 x 6.2 x 1023
// 4.816 / 4.82 x 1023
1
1
1
TOTAL 10
SULIT 7
6 (a) (i)
(b)
(c)
(d)
(e)(i)
(ii)
(ii)
(iii)
Heat change/release when one mole of a metal is displaced from its salt
solution by a more electropositive metal.
1. Brown solid is deposited/ formed
2. Blue solution becomes colourless
3. zinc powder dissolve
4. cup hot
To reduce heat loss to the surrounding
Zn + Cu2+
→ Zn2+
+ Cu
Q = (50)(4.2)(8)
= 1680 J
Mole of CuSO4 = 1000
2.050x
= 0.01 mol
Heat of displacement of copper = - 01.0
1680
= - 168 kJmol-1
Two different energy levels
Chemical / Ionic equation
1
1
1
1
1
1
1
1
1
1...10
Energy
Zn + Cu2+
Cu + Zn2+
SULIT 8
Section B
No MARKING CRITERIA MARK
SUB TOTAL
7 (a) Duralumin
Aluminium is soft /easily dented / cannot withstands pressure
(Any two correct answers)
1
2
3
7(b)(i)
(ii)
Tin
In pure copper,
atoms are of the same size
atoms are orderly arranged in layers
the layers of atoms can slide over each one another when a
force is apply
In bronze,
atoms of tin and copper have different size
the presence of tin atoms disrupt the orderly arrangement of
the copper atoms.
The layers of copper atoms are prevented from sliding over
each other easily.
1
1
1
1
1
1
1
7
7(c)(i) A: Hydrophobic part
B: Hydrophilic part
Part A is dissolved in oil / grease
Part B is dissolved in water
1
1
1
1
4
(ii) Anions of detergent are more effective than anions of soap in
hard water.
Anions of soap react with calcium ions/magnesium ions
to form scum / insoluble precipitate.
Amount of anions of soap is reduced /decreased.
Anions of detergent do not form scum/precipitate /the salts
formed are solubled
2 CH3(CH2)14COO- + Ca
2+ [CH3(CH2)14COO]2Ca
Or 2 CH3(CH2)14COO- + Mg
2+ [CH3(CH2)14COO]2Mg
1
1
1
1
1
1
6
Total 20
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SULIT 9
No MARKING CRITERIA MARK
SUB TOTAL
8(a) Z, Y and X
1. Z, Y, and X have three shells / in the same period
2. The proton number //positive charges in the nucleus increases
3. The forces of attraction between the nucleus and the electrons
in the shells increase
4. The shells filled with electrons are pulled nearer to the
nucleus.
[Any two correct answers from 2,3,and 4]
1
1
2
4
8(b) 1. The electron arrangement of atom X is 2.1 and atom Y is 2.4
2. Atom X donates the one valence electron to achieve the stable
duplet electron/ electron arrangement of 2
3. An X+
ion is formed/ X X+ + e
-
4. One atom of Y will receive 2 electrons to achieve the octet
electron arrangement
5. An Y4-
ion is formed / Y + 4e- Y
4-
6. X+ ion and Y
4- ion will attract each other by
strong electrostatic force to form ionic bond
7. A ionic compound X4Y is formed.
[or correct illustration of electron arrangement in the compound]
1
1
1
1
1
1
6
8(c)(i)
Number of shells
Electron arrangement
1
1
2
8(c)(ii) Melting point
Compound in (b) has higher melting point.
Compound in (c) has low melting point.
Explanation
In compound (b), ions are held together by strong electrostatic
forces.
In compound (c), molecules are held together by weak
intermolecular forces / van der Waals’ forces
Electric conductivity
Compound in (b) can conduct electricity in molten or aqueous
solution only.
Compound in (c) does not conduct electricity.
Explanation
Compound (b) : In molten or aqueous solution, ions can move
freely.
Compound (b) : Only consist of neutral molecules/ no free moving
ions.
1
1
1
1
1
1
1
1
4
4
Total 20
x
x
x
z w w
SULIT 10
Section C
No MARKING CRITERIA MARK
SUB TOTAL
9(a)
(i)
The end of the thistle funnel must lower than the level of the
hydrochloric acid solution.
The end of the delivery tube must be above the level of the acid
The stopper must be tight.
[ Accept other suitable precaution steps]
[Any two correct answers]
2
2
(ii)
Anhydrous calcium chloride / Anhydrous Copper (II) Sulphate
To dry the hydrogen gas// Absord water / Moist
1
1
2
(iii)
The dry hydrogen reacts /reduces the hot oxide of M
to produce M and water.
[Correct reactants and products]
1
1
2
(iv) M Oxygen
Mass 49.68 g 3.84g
Moles of atom 49.68/207=0.24 3.84/16=0.24
Simplest ratio 1 1
Empirical formula is MO
1
1
1
1
4
9(b)
(i)
Relative Molecular mass of (CH2)n = 28
(12 + 2)n = 28
n = 2
Thus, molecular formula = C2H4
1
1
2
(ii)
1+1
2
porcelain chips
Heat
Glass wool
soaked in
ethanol
Water
Gas J
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SULIT 11
1. A small amount of glass wool soaked in J is placed in a boiling
tube.
2. The boiling tube is clamped horizontally
3. The unglazed porcelain chips are placed in the middle section of
the boiling tube.
4. The boiling tube is closed with a stopper fitted with a delivery
tube
5. The unglazed porcelain chips are heated strongly. Then, the
glass wool is warmed gently to vaporize the ethanol.
6. The gas released is collected in a test tube.
1
1
1
1
1
1
6
20
No MARKING CRITERIA MARK
SUB TOTAL
10(a)
Oxidation is a loss of electrons. 1
2
Reduction is a gain of electrons 1
(b)
(i) Magnesium / zinc / iron / lead / tin
[accept symbol]
[reject Na, K, Ca]
1 1
(ii) W is more electropositive than Cu.
W has higher tendency to donate electrons.
W is located above Cu in the electrochemical series
W is able to displace Cu from its salt solution
W is able to reduce Cu2+
ion.
W is stronger than Cu as a reducing agent.
[Any three correct questions]
3
3
(ii) Oxidation number of W increases from 0 to +2
W undergoes oxidation
Oxidation number of Z decreases from +2 to 0
Z undergoes reduction
1
1
1
1
4
(c)
Correct set up of apparatus
Label correctly
1
1
2
Mixture of carbon powder
and oxide X
Heat
Crucible Pipe- clay
triangle
SULIT 12
Procedure:
1. A spatula of carbon powder and a spatula of solid oxide of X are
mixed throughly in a crucible.
2. The mixture is heated strongly.
3. Any changes that occur are observed.
4. Step a to 3 are repeated using oxide of Y.
Result:
Mixture Observation
Carbon + oxide of X The mixture burns with a bright
flame / The mixture glow brightly.
Carbon + oxide of Y No visible change
Conclusion:
Carbon is more reactive than X but less reactive than Y.
Equation:
C + 2XO 2X + CO2
1
1
1
1
1
1
1
1
8
20
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SULIT 13
PAPER 3
1 (a) KK0503 – Measuring and using numbers
EXPLANATION SCORE
[Able to write all the volumes with units accurately]
Initial burette readings: 0.80 cm3, 13.40 cm
3, 25.90 cm
3
Final burette readings : 13.40 cm3, 25.90 cm
3, 38.40 cm
3
3
[Able to record all the volumes accurately but without units / one decimal
place]
Initial burette readings: 0.8, 13.4, 25.9
Final burette readings : 13.4, 25.9, 38.4
2
[Able to write at least four readings of the volumes accurately] 1
1 (b) KK0506 – Communicating
EXPLANATION SCORE
[Able to construct a table correctly containing three labeled columns with
correct units and record all the burette readings and volume of acids used
accurately ]
Suggested answer:
Titration No. I II II
Initial burette
reading/cm3
0.80 13.40 25.90
Final burette
reading/cm3
13.40 25.90 38.40
Volume of acid
used/cm3
12.60 12.50 12.50
3
[Able to construct a table correctly containing three labeled columns without
units/one decimal place and record all the volumes accurately]
2
[Able to construct a table with at least three labels and four correct readings] 1
1 (c) KK0506 Communicating
EXPLANATION SCORE
[Able to calculate the average volume of acid used correctly and with unit]
Suggested answer:
Volume of acid used = 12.60 + 12.50 + 12.50
3
= 12.53 // 12.5 // 12.533 cm3
3
[Able to calculate the average volume correctly but without unit.] 2
[Able to show the calculation of average volume of acid used but incorrect
answer]
1
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SULIT 14
1 (d) KK0505 - Predicting
EXPLANATION SCORE
[Able to state the volume correctly]
6.27 cm3
3
[Able to state the volume but to one decimal place]
6.3 cm3// [6.0 – 7.0] cm
3
2
[Able to state the volume but inaccurately]
12.5 cm3//25.0 cm
3 1
1(e) KK0508 – Interpreting Data
EXPLANATION SCORE
[Able to classify the strong acids and the weak acids into their group the
correctly]
Strong acids: hydrochloric acid, nitric acid
Weak acids: ethanoic acid, carbonic acid, phosphoric acid
3
[Able to calssify the strong acids and the weak acids correctly but in opposite
group]
Strong acids: ethanoic acid, carbonic acid
Weak acids: hydrochloric acid, phosphoric acid, nitric acid
2
[Able to classify at least three acids into the correct group] 1
2(a) KK0510 - State variables
EXPLANATION SCORE
[Able to state the three variables correctly]
Manipulated variable Type of elements/metals
Responding variable: Rate of reaction//Reactivity of the reaction
Fixed variable: Water, size of metal used
3
[Able to state any two variables correctly] 2
[Able to state any one variable correctly] 1
2 (b) KK051202 – Stating hypothesis
EXPLANATION SCORE
[Able to state the relationship between manipulated variable and
responding variable correctly]
Suggested answer:
The metal which is below in Group 1 is more reactive the reaction with
water//The lower the metal in Group 1 the more reactive the reaction with
water
3
SULIT 15
[Able to state the relationship between manipulated variable and
responding variablebut in the opposite direction]
Suggested answer:
The more reactive the reaction, the lower the position of the metal in Group 1
2
[Able to state an idea of the hypothesis]
Suggested answer:
Metals in Group 1 can react with water
1
2(c) KK0509 – Operational definition
EXPLANATION SCORE
[Able to state the operational definition accurrately]
Suggested answer:
The metal that reacts more vigorously with water is a more reactive metal
3
[Able to give the operational definition correctly but inaccurrate]
Suggested answer:
The metals can react with water at a different rate.
2
[Able to state an idea of the operational definition]
Suggested answer:
Metals can react with water.
1
2(d)KK0504 – Making inference
EXPLANATION SCORE
[Able to state the inference accurately]
Suggested answer:
The solution produced is a strong alkali.
3
[Able to state the inference correctly]
Suggested answer:
The solution produced is an alkali.
2
[Able to give idea for inference]
The metals dissolve in water.
1
2(e) KK0507- Making relationship
EXPLANATION SCORE
[Able to state the relationship accurrately]
Suggested answer:
The lower the position of the metal in Group 1, the higher the reactivity of the
metal towards oxygen.
3
[Able to state the relationship correctly but less accurrate]
Suggested answer:
The reactivity of the metals is inversely proportional to their position in the
group.
2
SULIT 16
[Able to state an idea of a relationship]
Suggested answer:
Position of metals affect the reactivity
1
2(f) KK 0508 – Interpreting Data
EXPLANATION SCORE
[Able to arrange the metals in descending order based on their reactivity]
Rb, K, Na, Li
3
[Able to arrange the metals in ascending order based on their reactivity]
Li, Na, K, Rb
2
[Able to arrange the position of at least three metals in descending order
based on ther reactivity]
1
3 (a) KK051021 – Statement of problem
EXPLANATION SCORE
[Able to make a statement of the problem accurately and must be in question
form]
Suggested answer:
How does the number of carbon per molecule of alcohol affect/influence the
heat of combustion?//Does the increase in the number of carbon per molecule
of alcohol increases the heat of combustion?
3
[Able to make a statement of the problem but less accurrate//Accurate
statement of the problem but not in question form. ]
Suggested answer:
Does different types of alcohols have different heat of combustions?//
When the number of carbon per molecule of alcohol increases the heat of
combustion increases.
2
[Able to state an idea of statement of the problem]
Suggested answer:
Alcohols have different heat of combustion.
1
3(b) KK051202 – Stating variables
EXPLANATION SCORE
[Able to state all the three variables correctly]
Suggested answer:
Manipulated variable: Different types of alcohols//Different alcohols such
as ethanol, propanol and butanol.
Responding variable: Heat of combustion//Increase in temperature
Fixed variable: Volume of water,type of container/ size of container
3
[Able to state any two of the variables correctly]
2
[Able to state any one of the variables correctly]
1
SULIT 17
3 (c) KK051202 – Stating hypothesis
EXPLANATION SCORE
[Able to state the relationship between manipulated variable and responding
variable correctly]
Suggested answer:
When the number of carbon per molecule of alcohol increases, the heat of
combustion increases.
3
[Able to state the relationship between manipulated variable and responding
variable but in reverse direction]
Suggested answer:
The heat of combustion increases when the number of carbon per molecule of
alcohol increases.// Different types of alcohols have different heat of
combustion.
2
[Able to state an idea of the hypothesis]
Suggested answer:
Alcohols have different heat of combustion.
1
3(d) KK051205 – List of substances and apparatus
EXPLANATION SCORE
[Able to state the list of substances and apparatus correctly and completely]
Suggested answer:
Ethonol, propanol, butanol, water, [metal] beaker, spirit lamp, thermometer,
weighing balance, wooden block, tripod stand, wind shield, measuring
cylinder.
3
[Able to state the list of substances and apparatus correctly but not complete]
Suggested answer:
Ethanol, propanol, butanol, water, [metal] beaker, spirit lamp, thermometer,
weighing balance.
2
[Able to state an idea about the list of substances and apparatus]
Suggested answer:
Ethanol/propanol/butanol/water, beaker, thermometer.
1
3(e) KK051204 –Procedures
EXPLANATION SCORE
[Able to state a complete experimental procedure]
Suggested answer:
1. [200 cm3] of water is poured into a [copper] beaker.
2. Initial temperature of the water is recorded.
3. A spirit lamp is half filled with ethanol.
4. Initial mass of the spirit lamp is recorded.
5. Put the spirit lamp under the copper beaker and ignite the wick
immediately.
6. Stir the water and the flame is put off after the temperature has
3
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SULIT 18
increased by 30oC.
7. The highest temperature of the water is recorded
8. Immediately the final mass of the spirit lamp is recorded.
9. Repeat the experiment by replacing ethanol with propanol and
butanol.
[Able to state the following procedures]
1, 2, 4, 5,7,8
2
[Able to state the following procedures]
2, 4, 5, 7
1
3(f) Tabulation of data
EXPLANATION SCORE
[Able to exhibit the tabulation of data correctly with suitable headings and
units ] Types of
alcohols
Initial
temperature/oC
Highest
temperature/oC
Initial mass of
spirit lamp/g
Final mass of
spirit lamp/g
Ethanol Propanol Butanol
3
[Able to exhibit the tabulation of data less accurately with suitable headings
without units ] Types of
alcohols
Initial
temperature
Highest
temperaturer
Initial mass of
spirit lamp
Final mass of
spirit lamp
2
[Able state an idea about the tabulation of data] Alcohol Temperature Mass
1
END OF MARKING SCHEME