kimia sbp spm 2008

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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4541/1 2 [Lihat sebelah

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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


8 g ketulan zink + 100 cm3 of 1 mol dm

-3 sulfurik acid

D 8 g granulated zinc + 50 cm3 of 2 mol dm


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


Agar-agar panas +

kalium


Hot agar solution +

potassium


Agar-agar panas +

kalium


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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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4541/1 [Lihat sebelah

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NAMA:.................................................... Tingkatan :..............................

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4541/2

Kimia

Kertas 2

Ogos

2008

2 ½ jam


BAHAGIAN PENGURUSAN

SEKOLAH BERASRAMA PENUH / KLUSTER


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



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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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3

(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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4

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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5

(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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6

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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7

(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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8

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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9

(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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10

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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11

(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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12

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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13

(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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14

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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15

(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

SULIT 4541/2


SULIT

16

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]

SULIT 4541/2


SULIT

17

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

SULIT 4541/2


SULIT

18

(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

SULIT 4541/2


SULIT

19

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]


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


Name :………………………………………………………… Class: ………….………


BAHAGIAN PENGURUSAN

SEKOLAH BERASRAMA PENUH/KLUSTER


_______________________________________________

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


4541/3

KIMIA

Kertas 3

Ogos

2008

1½ Jam


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4541/3 SULIT

2

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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4541/3 SULIT

3

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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4541/3 SULIT

4

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

SULIT

4541/3 SULIT

5

(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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4541/3 SULIT

6

(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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4541/3 SULIT

7

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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4541/3 SULIT

8

(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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4541/3 SULIT

9

(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)

SULIT

4541/3 SULIT

10

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]



SULIT 1

BAHAGIAN PENGURUSAN

SEKOLAH BERASRAMA PENUH / KLUSTER


CHEMISTRY

TRIAL-EXAM

SPM 2008

MARKING SCHEME

PAPER 1

PAPER 2

PAPER 3


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


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 _


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


SULIT 9


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


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


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


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


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


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


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

kimia sbp spm 2008

Education