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JABATAN PELAJARAN MELAKABUKIT BARU, MELAKA

PEPERIKSAAN AKHIR TAHUNTINGKATAN 4 2011

CHEMISTRYKertas 1Oktober 2011

4541/1

1 jam Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini mengandungi 50 soalan.

2. Jawab semua soalan.

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

4. Hitamkan satu ruangan sahaja bagi setiap soalan.

5. Rajah tidak dilukis mengikut skala kecuali dinyatakan6. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan

Kertas soalan ini mengandungi 25 halaman bercetak


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INFORMATION FOR CANDIDATES

1. This question paper consists of 50 questions.

2. Answer all questions .

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

4. Blacken only one space for each question.

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

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

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

MAKLUMAT UNTUK CALON

1. Kertas soalan ini mengandungi 50 soalan .

2. Jawab semua soalan

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

4. Hitamkan satu ruangan sahaja bagi setiap soalan .

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

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

7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan

Question 1 to Question 50 are followed by four options A, B, C or D.

Choose the best option for each question and blackened the corresponding space onthe objective answer sheet.

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


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

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

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

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

jirim.

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

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

I Petroleum industry Industri petroleum

II Nutritional industry Industri pemakanan

III Mining industry Industri perlombongan

IV Paint making industry Industri membuat cat

A I and II only I dan II sahaja

B I, II and III only

I, II dan III sahaja

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

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


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

A take food rich in calciummakan makanan yang kaya dengan kalsium

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

C reduce fatty food intakekurangkan mengambil makanan berlemak

D reduce sugary food intakekurangkan mengambil makanan bergula

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

A EmasGold

C Water Air

B Nitrogen Nitrogen

D ChlorineKlorin

5 The melting point of a substance X is -2 oC and its boiling point is 75 oC. What is thephysical state of substance X at -5 oC and 85 oC?Takat lebur bahan X ialah -2 oC dan takat didihnya ialah 75 oC. Apakah keadaan fizikalbahan X pada suhu -5 0C dan 85 0C?

At -5 oCPada -5 oC

At 85 oCPada 85 oC

A SolidPepejal

GasGas

B SolidPepejal

LiquidCecair

C LiquidCecair

GasGas

D Gas

Gas

Solid

Pepejal


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

Diagram 1 Rajah 1

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

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

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

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

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

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

A Iodine-131 Iodin-131

B Cobalt-60Kobalt-60

C Sodium-24 Natrium-24

D Carbon-12Karbon-12


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

19

F9

Diagram 2 Rajah 2

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

Proton number Nombor proton

Nucleon number Nombor nukleon

Number of electron Bilangan elektron

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

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

Diagram 3 Rajah 3

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

A 2 C 5

B 3 D 7

X


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

Diagram 4 Rajah 4

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

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

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

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

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

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

2 Al 2O3 4 Al + 3 O 2

What is the volume of oxygen gas evolved when 204 g of aluminium oxide is used in theextraction ? Berapakah isipadu gas oksigen yang terbebas apabila 204 g aluminium oksida digunakandi dalam proses ini?[ Relative atomic mass ; O = 16 ; Al = 27, 1 mol of gas occupies 24.0 dm 3 at roomtemperature ][Jisim atom relatif ; O = 16, Al = 27, 1 mol gas menempati 24.0 dm 3 pada suhu bilik.]

A 36 dm C 48 dm

B 144 dm D 72 dm


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12 Diagram 5 shows the electron arrangement of a molecule of compound XY 2. ( Onlythe valence electrons are shown ).

Rajah 5 menunjukkan susunan elektron bagi molekul sebatian XY 2 (hanyaelektronvalens yang ditunjukkan).

Diagram 5 Rajah 5

X and Y could be : X dan Y mungkin :

X Y

A Carbon Oxygen

B Carbon Chlorine

C Carbon Hydrogen

D Chlorine Carbon

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

A C

B D

R

R

R

R


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

Diagram 6 Rajah 6

What could be substance Y ? Apakah mungkin bahan Y?

I Copper(II) oxideKuprum(II) oksida

II Magnesium oxide Magnesium oksida

III Potassium oxideKalium oksida

IV Lead (II) oxidePlumbum (II) oksida

A I and IV only I and IV sahaja

B II and III only II and III sahaja

C III and IV only III and IV sahaja

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

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

Element

Unsur

P Q

Mass(g) Jisim(g)

0.32 0.36

Table 1 Jadual 1

What is the empirical formula for the substance formed? Apakah formula empirik bagi sebatian yang terbentuk ?[Relative atomic mass :P = 64 ; Q = 35.5][ Jisim atom relatif: P =64; Q = 35.5]A PQ C PQ 4

B PQ 2 D P2Q3

SubstanceY Bahan Y

Hydrogen gasGas hidrogen


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16 2.7 g of element X reacts with 2.4 g element Y to form a substance with empirical formulaof X 2Y3. What is the atomic mass of Y?2.7 g unsur X bertindak balas dengan 2.4 g unsur Y untuk membentuk sebatian dengan

formula empirik X 2Y 3. Berapakah jisim atom relatif bagi Y?(Relative atomic mass : X = 27)

( Jisim atom relatif : X = 27)

A 8 C 24

B 16 D 31

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

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

A 2.8

B 2.8.2

C 2.8.8

D 2.8.8.8

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

A Neon and Argon Neon dan Argon

B Lithium and Potassium Litium dan Kalium

C Iodine and Bromine Iodin dan Bromin

D Nitrogen and Phosphorus Nitrogen dan Fosforus

24

T12


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

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

A Newlands

B Meyer

C Mendeleev

D Dobereiner

20 Table 2 shows the proton number and number of electrons of several particles.Which of the following particles is an anion?

Jadual 2 menunjukkan nombor proton dan bilangan elektron bagi beberapa zarah. Manakah di antara berikut merupakan anion?

Particles Zarah

Proton Number Nombor Proton

Number of electrons Bilangan elektron

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

Table 2 Jadual 2

A P

B Q

C R

D S

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


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21 Table 3 shows the elements in Period 3 of the Periodic Table of elements. The elements canreact with oxygen to form oxides.

Jadual 3 menunjukkan unsur-unsur Kala 3 dalam Jadual Berkala Unsur. Unsur-unsur tersebut bertindak balas dengan oksigen membentuk oksida.

ElementUnsur Na Mg Al Si P S Cl

Table 3 Jadual 3

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

A S C Si

B P D Al

22 The number of neutrons of atom X is 20. If the number of electrons of ion X + is 18, whatis the relative atomic mass of X?

Bilangan neutron bagi suatu atom X ialah 20. Jika bilangan elektron ion X 2+ ialah 18,berapakah jisim atom relatif X?

A 18 C 38

B 20 D 40

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

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

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

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

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


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

A Accepts an electron Menerima satu elektron

B Donates an electron Menderma satu elektron

C Accepts two electrons Menerima dua elektron

D Shares a pair of electrons Berkongsi sepasang elektron

25 Sodium and sulphur have the proton number 11 and 16 respectively. They react to formsodium sulphide. Which of the following statements are true?

Natrium dan sulfur masing-masing mempunyai nombor proton 11 dan 16. Merekabertindakbalas membentuk natrium sulfida. Antara pernyataan berikut, yang mana adalahbenar?

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

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

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

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

A I and IV only I dan IV sahaja

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

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

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


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

Atom G H J K

Electron arrangementSusunan elektron

1 2.5 2.8.2 2.8.8.1

Table 4 Jadual 4

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

A G and H

B H and J

C G and K

D H and K

27 Which of the following set of apparatus is the most suitable to be used in electrolysis of copper(II) sulphate solution?

Antara susunan radas yang berikut, yang manakah paling sesuai digunakan dalam proseselektrolisis larutan kuprum

(II)sulfat

?

A B

C D

Carbon rod Rod karbon

Copper(II)sulphate solution

Larutanku rum (II) sul at

Carbon rod Rod karbon

Copper(II)sulphate solution

Larutanku rum (II) sul at


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28 Table 5 contains information on the melting points and boiling points of substances P, Q, Rand S.

Jadual 5 mengandungi maklumat tentang takat lebur dan takat didih bagi bahan-bahanP,Q,R dan S

Substance Bahan

Melting point (C)Takat lebur (C)

Boiling point (C)Takat didih (C)

Electrical conductivity

in moltenstate

P -30 174 Cannot conduct

Q 43 182 Cannot conduct

R 119 444 Can conduct

S 688 1100 Can conduct

Table 5Jadual 5

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

Ionic compoundSebatian ion

Covalent compoundSebatian kovalen

A P and Q R and S

B R and S P and Q

C P, Q and R S

D S P

29 What is the percentage of nitrogen by mass in ammonium nitrate, NH 4NO 3? Apakah peratus nitrogen dalam ammonium nitrat NH 4 NO 3 mengikut jisim?[ Relative atomic mass: H = 1, N = 14 ,O = 16][ Jisim atom relatif : H = 1, N = 14, O = 16]

A 17.50 %

B 21.21 %

C 35.00 %

D 53.85 %


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

A Free moving ions Ion yang bebas bergerak

B Free moving electrons Elektron yang bebas bergerak

C Free moving atom Atom yang bebas bergerak

D Free moving molecules Molekul yang bebas bergerak

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

Diagram 6

Diagram 7 Rajah 7

Which of the following is true? Di antara berikut, yang manakah adalah benar?

Metal X/Y Logam X/Y

Negative TerminalTerminal negatif

A Iron/ZincFerum/Zink

IronFerum

B Iron/AluminiumFerum/Aluminium

IronFerum

C Zinc/Copper Zink/Kuprum

Zinc Zink

D Magnesium/Aluminium Magnesium/Aluminium

Aluminium Aluminium

Y platePlat Y

ElectrolyteElektrolit

V

X platePlat X


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32 Diagram 8 shows the setup of apparatus of a chemical cell.Which of the following are not true of a chemical cell?

Rajah 8 menunjukkan susunan radas suatu sel kimia. Antara berikut yang manakah tidak benar mengenai sel kimia?

Diagram 8Rajah 8

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

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

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

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

A I and III only

B I and IV only

C II and IV only

D I, III and IV only

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

A Ammonia Ammonia

B Potassium oxideKalium oksida

C Carbon dioxideKarbon dioksida

D Sodium hydroxide Natrium hidroksida

Electrodes Elektrod

Liquid HCecair H

V


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34 It is discovered that a compound with formula AB dissolves in water. What inference canyou make about the compound ?

Didapati satu sebatian dengan formula AB larut dalam air. Apakah inferens yang bolehdibuat tentang sebatian itu?

A It is a covalent compound Merupakan sebatian kovalen

B The compound ionizes in waterSebatian mengion dalam air

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

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

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

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

II Molten copper is used as the electrolyteKuprum lebur dijadikan elektolit

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

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

A I and III only

B II and IV only

C I, II and IV only

D I, III and IV only


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

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

A Na + + e - Na

B 2H + + 2e - H2

C 2Cl - Cl 2 + 2e-

D 4OH - O2 + 2H 2O + 4e-

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

A 2HCl (aq) + MgO(s) MgCl 2(aq) + H 2O(l)

B H2SO 4(aq) + BaCl 2(aq) BaSO 4(s) + 2HCl(aq)

C HNO 3(aq) + NaHCO 3(s) NaNO 3(aq) + CO 2(g) + H 2O(l)

D HCl(aq) + NH 3(aq) NH 4Cl(aq)

Diagram 9 Rajah 9


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

Diagram 10 Rajah 10

Which of the following substance could light up the bulb?

Antara bahan berikut, yang manakah boleh menyalakan mentol?

A Potassium chloride solution Larutan kalium klorida

B Glucose solution Larutan glukosa

C Magnesium oxide Magnesium oksida

D Tetrachloromethane solution Larutan tetraklorometana

39 Table 6 shows the degree of dissociation of four solutions of alkalis which have the sameconcentration.

Jadual 6 di bawah menunjukkan darjah penceraian empat larutan alkali yang samakepekatan.

Solution Larutan

Degree of dissociation Darjah penceraian

W Low Rendah

X MediumSederhana

Y HighTinggi

Z Very highSangat tinggi

Table 6 Jadual 6

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

B X D Z

Substancebahan


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40 Diagram 11 shows two electrolytic cells which use two different type of electrodes, cell Auses carbon electrode while cell B uses copper electrode.

Rajah 11 menunjukkan dua sel elektolisis yang mana menggunakan dua jenis elektrod yangberlainan. Sel A mengunakan elektrod karbon manakala sel B mengunakan elektrod kuprum.

CeCell A Cell B

Diagram 11 Rajah 11

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

Cell ASel A

Cell BSel B

A 4OH - 2H 2O + O 2 + 4e - Cu + + 2e - Cu

B 4OH - 2H 2O + O 2 + 4e- Cu Cu + + 2e -

C Cu + + 2e - Cu 4OH - 2H 2O + O 2 + 4e-

D Cu Cu + + 2e - 4OH - 2H 2O + O 2 + 4e-

41 What is the mass of sodium hydroxide, NaOH which is required to prepare 250 cm sodiumhydroxide solutions with a concentration of 100 gdm -3?[Relative atomic mass: Na = 23; O = 16; H = 1]

Berapakah jisim natrium hidroksida, NaOH yang diperlukan untuk menyediakan 250 cm 3 larutan natrium hidroksida dengan kepekatan 100 gdm -3?[ Jisim atom relatif Na = 23; O = 16; H = 1]

A 25g C 20g

B 35g D 40g

Copper(II)sulphatesolution

Larutankuprum (II)sulfat

CopperElectrode

Elektrod kuprum

CarbonElectrode

Elektod karbon


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42 50.0 cm of 0.4 moldm - potassium hydroxide solution, KOH is titrated with sulphuric acid,H2SO 4. What is the volume of 1.0 moldm

-3 sulphuric acid which is needed to neutralise thispotassium hydroxide solution?50.0 cm 3 larutan kalium hidroksida, KOH 0.4 moldm -3 dititratkan dengan asid sulfurik,

H 2SO4. Berapakah isipadu asid sulfurik 1.0 moldm-3 yang diperlukan untuk meneutralkan

larutan kalium hidroksida ini?

A 10.0 cm C 40.0 cm

B 20.0 cm D 50.0 cm

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

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

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

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

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

A I and II only

B I, II and III only

C I, III and IV only

D II, III and IV only

44 The formula for a sulphate ion is SO 4- and for a nitrate ion is NO 3

- . If the formula of the

sulphate salt of M is MSO 4, what is the formula of nitrate salt of M?Formula bagi sulfat ion adalah SO 42- dan bagi nitrat ion adalah NO 3

-. Jika formula bagigaram M sulfat adalah MSO 4 , apakah formula bagi garam M nitrat?

A MNO 3

B M2NO 3

C M(NO 3)2

D M(NO 3)3


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

CaCO 3 + 2HNO 3 Ca(NO 3)2 + H 2O + CO 2

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

A H2O and CO 2

B HNO 3 and CO 2

C CaCO 3 and HNO 3

D Ca(NO 3)2, H 2O and CO 2

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

I Zinc chloride Zink klorida

II Barium sulphate Barium sulfat

III Sodium nitrate Natrium nitrat

IV Magnesium carbonate Magnesium karbonat

A I and III only

B II and IV only

C I, II and III only


47 Excess magnesium oxide is reacted with 25.0 cm of 2.0 moldm - nitric acid. Calculate themaximum mass of magnesium nitrate salt formed.[Relative atomic mass: N=14, 0=16, Mg=24]

Magnesium oksida berlebihan bertindak balas dengan 25.0 cm 3 asid nitrik berkepekatan2.0 moldm -3. Kira jisim bagi garam magnesium nitrat yang terbentuk.[Jisim atom relatif : N=14, 0=16, Mg=24]

A 7.40 g C 3.70 g

B 4.30 g D 1.48 g


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

I Sodium carbonate

Natrium karbonat II Calcium carbonate

Kalsium karbonat III Potassium carbonate

Kalium karbonat IV Magnesium carbonate

Magnesium karbonat

A II only

B II and IV only

C I and IV only


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

AgNO 3 (aq) + NaCl(aq) NaNO 3 (aq) + AgCl(s)

Calculate the mass of silver chloride formed when 0.1 mol of silver nirate solution is addedto 0.1 mol of sodium chloride solution?

Hitungkan jisim argentum klorida yang terbentuk apabila 0.1 mol larutan argentum nitrat di tambah ke dalam 0.1 mol larutan natrium klorida?[ Relative atomic mass : Cl = 35.5; Ag = 108][ Jisim atom relatif : C =,35.5; Ag =108]

A 28.70 g

B 43.05g

C 21.50 g

D 14.35g


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

A PlatinumPlatinum

B NickelNikel

C IronBesi

D Vanadium (V) oxideVanadium (V) oksida

END OF QUESTION PAPER KERTAS SOALAN TAMAT


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[Lihat sebelah

Nama

Kelas JABATAN PELAJARAN MELAKA

BUKIT BARU, MELAKA

PEPERIKSAAN AKHIR TAHUNTINGKATAN 4 2011CHEMISTRYKertas 2Oktober 2011

4541/2

2 jam Dua jam tiga puluh minit


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

2. Jawab semua soalan dalam Bahagian A. Tulis jawapan dalam Bahagian A dalam ruangan yang disediakan..

3. Jawab satu soalan dalam Bahagian B dan satusoalan dalan Bahagian C. Jawab soalan dalam

Bahagian B dan Bahagian C denganterperinci. Anda boleh menggunakan persamaan kimia, rajah, jadual, graf dankaedah yang bersesuaian untuk menerangkan

jawapan anda.4. Tunjukkan jalan kerja. Ia dapat membantu anda

mendapat markah.5. Rajah dalam soalan tidak dilukis mengikut

skala.6. Markah yang diperuntukan bagi setiap soalan

ditunjukkan dalam kurungan.7. Anda boleh menggunakan kalkulator saintifik

yang tidak diprogramkan.8. Serahkan kertas jawapan pada akhir waktu

peperiksaan.


Untuk kegunaan pemeriksaBahagian No. Markah

A

1234

56Jumlah

B78

C9

10Jumlah

Jumlah Markah


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4541/2 2011 Hak Cipta Jabatan Pelajaran Melaka [Lihat sebelah SULIT

3

dry hydrogenhidrogen kering

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

[ 2 marks ](d) S is an inert gas which chemically unreactive

S merupakan gas lengai yang tidak reaktif secara kimia

Explain the above statement.Terangkan kenyataan di atas.

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

[ 1 mark ]

2 Diagram 2 shows the apparatus set-up used in an experiment to determine the empirical formulafor an oxide of lead.

Rajah 2 menunjukkan susunan radas yang digunakan dalam eksperimen bagi menentukan formula empirik bagi oksida plumbum.

oxide of leadoksida plumbum

Diagram 2 Rajah 2

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

Mass of an oxide of lead = 4.78 g Jisim oksida plumbumMass of lead = 4.14 g

Jisim plumbum


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4

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

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

.....

[ 1 mark ](b) Name one substance that can be used to dry the hydrogen gas.

Namakan bahan yang boleh digunakan untuk mengeringkan gas hidrogen.

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

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

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

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

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

[ 1 mark](d) How to ensure the reaction is complete ?

Bagaimana untuk memastikan tindak balas adalah lengkap?

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

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

[ 2 marks](e) Determine the empirical formula for oxide of lead ?

Tentukan formula empirik bagi oksida plumbum ?[Relative atomic mass for O = 16 and Pb = 207][Jisim atom relatif bagi O = 16 dan Pb = 207]

[ 4 marks]


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(f) Why does the empirical formula of magnesium oxide cannot be determined using theabove method ?

Mengapa formula empirik magnesium oksida tidak boleh ditentukan menggunakankaedah di atas ?

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

[ 1 mark]

3 Diagram 3 shows the positions of 6 elements represented by the letters A, B, C, D, E, F in thePeriodic Table of Elements.

Rajah 3 menunjukkan kedudukan 6 unsur yang diwakili oleh huruf A,B,C,D,E, F dalam Jadual Berkala Unsur.

A B C D EF

Diagram 3 Rajah 3

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

Nyatakan unsur yang wujud sebagai molekul dwiatom pada keadaan bilik.

.

[ 1 mark ](b) State one special characteristic of element F .

Nyatakan satu ciri istimewa bagi unsur F.

.....

[ 1 mark ](c) (i) Arrange atoms A, B, C, D and E in decreasing order of atomic size.

Susun atom A, B ,C , D dan E mengikut tertib pengurangan saiz atom.

...

[ 1 mark ](ii) Explain your answer in (c)(i).

Huraikan jawapan anda dalam (c)(i).

...

...

[ 3 marks ]


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

.........

[ 1 mark ](e) Write the chemical equation for the reaction between the oxide of A and water.

Tuliskan persamaan kimia untuk tindakbalas antara oksida A dan air.

.....

[ 3 marks]

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

Elements Proton number Electron arrangement

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

Table 4Jadual 4

(a) Based on Table 4, answer the following questions. Berdasarkan Jadual 4, jawab soalan-soalan berikut.

(i) What is the proton number of element X ? Berapakan nombor proton bagi unsur X?

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

[ 1 mark ](ii) What is the electron arrangement for ion Y?

Apakah susunan elektron bagi ion Y?

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

[ 1 mark ](b) Element T reacts with element U to form a compound

Unsur T bertindakbalas dengan unsur U untuk membentuk satu sebatian(i) Give the molecular formula of compound formed.

Berikan formula molekul bagi sebatian yang terbentuk.

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

[ 1 mark ]


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

...

[ 1 mark ] (iii) Give two physical properties of the compound formed.

Berikan dua sifat fizikal sebatian yang terbentuk.

...

...

[ 2 marks ] (iv) Illustrate the electron arrangement of the compound formed in (b)(i)

Lukis susunan elektron bagi sebatian yang terbentuk dalam (b)(i)

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

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

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

[ 1 mark ](d) State an element that can form a cation.

Nyatakan satu unsur yang boleh membentuk kation.

...

[ 1 mark ]


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5 Table 5.1 shows incomplete observation for two sets of electrolysis of sodium chloride solutionwith different concentration using carbon electrode.

Jadual 5.1 menunjukkan pemerhatian yang tidak lengkap bagi dua set elektrolisis larutannatrium klorida dengan kepekatan yang berbeza menggunakan elektrod karbon .

Set

Concentration of sodium chloride

solution(mol dm -3)

Kepekatan larutannatrium klorida

(mol dm -3)

ObservationPemerhatian

Set 1 0.002

Anode Bubbles of colourless gas is releasedGas tanpa warna dibebaskan

Cathode Bubbles of colourless gas is releasedGas tanpa warna dibebaskan

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

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

Table 5.1 Jadual 5.1

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

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

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

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

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

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

[ 2 marks ](b) Based on experiment in set 1:

Berdasarkan eksperimen dalam set 1: (i) Name the colourless gas formed at the cathode.

Namakan gas tanpa warna yang terbentuk di katod.

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

[ 1 mark ]


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

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

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

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

Apparatus Radas

Beaker, connecting wire, galvanometer Bikar, wayar penyambung, galvanometer

Materials Bahan

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

Table 5.2 Jadual 5.2

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

Complete the diagram below. Lengkapkan rajah di bawah.

[ 2 marks ](ii) State the direction of electron flow in this experiment.

Nyatakan arah pergerakan elektron dalam eksperimen ini.

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

[ 1 mark ]


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

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

[ 1 mark ]

6 An experiment is carried out to find the end point of acid-base titration. 25.0 cm of 1.0 moldm - sodium hydroxide solution reacts with hydrochloric acid. Table 6 shows the results of theexperiment.Satu eksperimen dijalankan untuk menentukan takat akhir peneutralan antara asid dan alkali.25.0 cm 3 bagi 1.0 moldm -3 larutan natrium hidroksida bertindak balas dengan asid hidroklorik.

Jadual 6 menunjukkan keputusan bagi eksperimen tersebut.

Volume of hydrochloric acid First readingSecondreading

Thirdreading

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

Table 6 Jadual 6

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

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

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

...

[ 1 mark ]


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(ii) Based on the indicator solution mentioned in (b)(i), state the colour change at theend point.

Berdasarkan larutan penunjuk yang dinyatakan di dalam (b)(i), nyatakan perubahan warna pada takat akhir.

...

[ 1 mark ](c) (i) Complete Table 6 to find the volume of hydrochloric acid used.

Lengkapkan Jadual 6 untuk menentukan isipadu asid yang digunakan. [ 1 mark ]

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

[ 1 mark ](d) Write the chemical equation for this experiment.

Tulis persamaan kimia bagi eksperimen ini.

.

[ 1 mark ](e) Find the concentration of hydrochloric acid used.

Tentukan kepekatan bagi asid hidroklorik yang digunakan.

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

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

.....

[ 1 mark ]


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Section B[20 marks ]

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

7 (a) Diagram 7 shows the electron arrangement of a molecule PQ 2. Rajah 7 menunjukkan susunan elektron bagi satu molekul PQ 2.

Diagram 7 Rajah 7

Based on Diagram 7, write the electron arrangement for atoms of element P and elementQ.Explain the position of element Q in the Periodic Table.

Berdasarkan Rajah 7, tulis susunan elektron bagi atom unsur P dan unsur Q.Terangkan kedudukan unsur Q dalam Jadual Berkala

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

Element Electron arrangementW 2.4X 2.8.7Y 2.8.8.2

Table 7 Jadual 7

Using the information in Table 7, explain how two compounds can be formed from theseelements based on their electron arrangements.The two compounds should have different bond types.

Menggunakan maklumat dalam Jadual 7, terangkan bagaimana dua sebatian dapat terbentuk dari unsur-unsur ini berdasarkan susunan elektron.

Dua sebatian ini mestilah berbeza jenis ikatan.[10 marks]

(c) Compare the physical properties for both chemical compound formed in (b). Bandingkan sifat-sifat fizikal bagi kedua-dua sebatian yang terbentuk dalam (b).

[ 4 marks ]


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

Acid Asid

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

pH value Nilai pH

Hydrochloric acid, HCl Asid hidroklorik, HCl 0.1 1

Ethanoic acid, CH 3COOH Asid etanoik, CH 3COOH

0.1 4

Table 8 Jadual 8

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

Apakah takrifan bagi asid kuat dan asid lemah?[ 2 marks ]

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

[ 2 marks ](iii) Explain why the pH values of the two acids are different.

Jelaskan tentang perbezaan nilai pH kedua-dua asid. [ 4 marks ]

(b) (i) What is the definition of molarity?

State the formula and the unit of molarity. Apakah takrifan kemolaran? Nyatakan formula dan unit bagi kemolaran.

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

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

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

neutralise the solution in b (ii).

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

[ 4 marks ]


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14

Section C[20 marks ]

Answer any one question from thissection

Jawab mana-mana satu soalan dari

bahagian ini

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

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

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

Experiment Eksperimen Apparatus set-upSusunan radas

I Copper electrodesElektrod kuprum

Copper(II) sulphate solution

Larutan kuprum(II) sulfat

A

II

Diagram 9 Rajah 9

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

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

[ 6 marks ]

Copper(II) sulphate solutionLarutan kuprum(II) sulfat

A

Carbon electrodesElektrod karbon


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

Table 9 Jadual 9

Pairs of metal

Pasangan logam

Voltage (V)

Nilai voltan (V)

Positive terminal

Terminal positif B / C 0.1 CA / C 0.8 C

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

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

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

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

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

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

Beaker, connecting wire and crocodile clip, battery, silver metal,silver nitrate solution,

Bikar, wayar penyambung bersama klip buaya, bateri, kepinganargentum , larutan argentum nitrat,

Describe an experiment on how to solve these problem. In your description include adiagram to show the set-up of apparatus.

Huraikan satu eksperimen bagaimana untuk mengatasi masalah ini. Dalam penerangananda sertakan gambarajah untuk menunjukkan susunan radas.

[ 8 marks ]


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

[ 2 marks ](ii) Name salt derived from

Nitric acid Hydrochloric acid

Namakan garam yang dihasilkan dari Asid nitrik Asid hidroklorik

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

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

Potassium sulphate, K 2SO 4 Kalium sulfat, K 2SO4

Lead (II) sulphate, PbSO 4 Plumbum (II) sulfat, PbSO 4

Zinc sulphate, ZnSO 4 Zink sulfat, ZnSO 4

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

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

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

(c) With the aid of a labelled diagram, describe the procedure of experiment to prepare

the named insoluble salts by using the reactant in 10(b)(ii).Your answer should include the list of materials and apparatus chemical equation ionic equation for the reaction.

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

Jawapan anda mestilah mengandungi senarai bahan dan alat radas

persamaan kimia persamaan ion bagi tindak balas.

[12 marks]

END OF QUESTION PAPER KERTAS SOALAN TAMAT


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INFORMATION FOR CANDIDATESMAKLUMAT UNTUK CALON

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

2. Answer all questions in Section A. Write your answers for Section A in the spaces providedin the question paper.

Jawab semua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yangdisediakan dalam kertas soalan.

3. Answer one question from Section B and one question from Section C .Write your answers for Section B and Section C on the writing paper provided by theinvigilators.Answer questions in Section B and Section C in detail.You may use equations, diagrams, tables, graphs and other suitable methods to explain your

answer. Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C . Tuliskan jawapanbagi Bahagian B dan Bahagian C pada kertas tulis yang disediakan. Jawab Bahagian B danBahagian C dengan terperinci. Anda boleh menggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

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

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

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

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

8. The time suggested to answer Section A is 90 minutes, Section B is 30 minutes and SectionC is 30 minutes.

Masa yang dicadangkan untuk menjawab Bahagian A ialah 90 minit, Bahagian B ialah 30 minit danBahagian C ialah 30 minit.

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

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


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MARKING SCHEME OF CHEMISTRY PAPER 2

Scheme Marks Sub-total

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

2(ii) 16 1

(b) (i) Q and R,

Q and R have same number of protons butdifferent number of neutrons/ different nucleonnumber

1

1

4

(ii)

Q

Q

1

1

(c) (i) 2.8.7 1

3

1

Total10 m

(ii)

Number of shells(3)

Number of electrons

1

1

(d) Because S has 8 valence electrons // has achieved[stable] octet electron arrangement.

1

37

17

35

17

R


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- formula of reactant- formula of product- balance equation

111 3

Total10 m

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

b (i) TU 4 1

6

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

- cannot conduct electricity in any state //

- insoluble in water // soluble in organicsolvent.[any two of the above]

11

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

[ the atom is labelled]

1

1c WU 2 1 1d V // W // Y

[ any one ]1 1

Total10m

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

11

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

- Blue litmus paper turn red and [bleached]11

b (i) Hydrogen 12(ii) 2H + + 2e H2 1

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

copper(II) sulphate solution

1

1

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

Total10m


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

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

1

12

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

12

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

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

= 20.80 cm 3 1 1

d NaOH + HCl NaOH + H 2O- correct formula and reactant

1 1

e M aVa = n a MbVb nb

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

[ accept another suitable method ]

1

1 2

f Nitric acid 1 1Total10m

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

111111

6

b Ionic bond:- X atom has 7 valence electron and Y atom has 2

valence electron.- These electron arrangement are unstable.- To achieve a stable electron arrangement, Y atom

donate 2 valence electron and form Y 2+ ions- 2 atom X receive 1 electron each and form X - ions.- Y 2+ ion and X - ions are attract to each other- to form an ionic compound with formula YX 2

11

1111


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Covalent bond:- W atom has 4 valence electron and X atom has 7

valence electron.- To achieve a stable electron arrangement, one W

atom share 4 valence electron with 4 atom X.- They will form 4 single covalent bond- with a formula WX 4

1

1

11

10

c Ionic compound Covalent compound1. soluble in water Insoluble in

water2. insoluble in organicsolvent

Soluble inorganic solvent

3. conduct electricity inmolten and aqueous state

Cannot conductelectricity in any state

4. high melting and boilingpoint

Low meltingand boiling point

1

1

1

1 4

Total = 20m

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

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

(ii). Strong acid - hydrochloric acid / HCl

Weak acid - ethanoic acid / CH 3COOH

(iii). - hydrochloric acid ionises completely in waterand produced high concentration of hydrogenions

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

- ethanoic acid ionises partially in water andproduced lower concentration of hydrogenions.

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

1

1

11

1

1

1

1

2

2

4


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b (i). Molarity is the number of moles solute present in1 dm 3 solution.

- Molarity = no of moles of solute (mol)

Volume of solution (dm 3)

- Unit , moldm -3

(ii). - Calculation: M 2 = 100 X 0.050.5

= 10 cm 3 - Using pipette, 10.0 cm 3 of 0.50 moldm -3 of

hydrochloric acid is transferred to a 100 mlvolumetric flask.

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

- Add distilled water dropwise to the volumetricflask until water level exactly reach itscalibration mark

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

(iii). - Molarity of NaOH = 40 gdm -3 23 + 16 + 1

= 1.0 moldm -3

NaOH + HCl NaCl + H 2O

MaVa = naMbVb nb

- 0.05 X 100.0 = 11.0 X V b 1

- Volume of NaOH, V b = 5.0 cm 3 [ Accept another suitable method ]

1

1

1

1

1

1

1

1

1

1

1

1

3

5

4

Total20m

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

111 3

(b)I II

Anode becomes thinner Gas bubbles are releasedCopper (II) ion OxygenCu Cu + + 2e 4OH - O2 + 2H 2O + 4e

1+11+1

1+1 6


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

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

11

(d) Procedure of experiment:

i. [50-200 cm 3] dilute silver nitrate solution ispoured into a beaker.

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

battery // silver metal is connected to positiveterminal of battery

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

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

- Functional diagram contain two different metalsas electrode ( no need with correct electrode) andthe solution is shaded correctly.

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

11

1

111

1

18

Total = 20m

10 a

b

c

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

metal ion or ammonium ion

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

(i) Soluble salts : potassium sulphate and zincsulphate

Insoluble salts : lead (II) sulphate

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

- Alternative Diagram :(i) Process of mixing the solution, contains:

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

shade the solution / mixture correctly

1

1

11

11

1+1

11

4

4


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OR

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

Lead (II) sulphate in filter paper (asresidue), Sodium nitrate solution in thebeaker (as filtrate and shaded )

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

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

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

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

ii. [50.0 cm 3 of 0.5 moldm -3] of lead (II ) nitratesolution is measured using 50.0 ml measuringcylinder and pour into another beaker, B.

iii. Solution in beaker A is poured into thesolution in beaker B.

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

using filter paper and filter funnel and rinsed theresidue with distilled water

vi. Dry the residue by pressing between two filterpapers.

- Chemical equation:Na 2SO 4 + Pb(NO 3)2 PbSO 4 + 2NaNO 3

- Correct reactant and product- Balance equation

- Ionic equation:Pb 2+ + SO 4

2- PbSO 4

OR

1

1

1

1

1

11

1

1

11

1

12

Total20

END OF MARK SCHEME


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SULIT 4541/3

[Lihat sebelah

Nama

Kelas JABATAN PELAJARAN MELAKA

BUKIT BARU, MELAKA

PEPERIKSAAN AKHIR TAHUNTINGKATAN 4 2011

CHEMISTRYKertas 3Oktober 2011

4541/3

1 jam Satu jam tiga puluh minit


1. Tuliskan nama dan tingkatan padaruang yang disediakan.

2. Kertas soalan ini adalah dalam dwibahasa.

3. Calon hendaklah membaca arahan padahalaman 2 .

Untuk kegunaan pemeriksa sahaja

Soalan MarkahPenuhMarkah

diperolehi

1 33

2 17

Jumlah 50



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2

INFORMATION FOR CANDIDATES

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

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

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

4. You may use equations, diagrams, tables, graph and other suitable methods to explainyour answer .

Anda boleh menggunakan persamaan , rajah, jadual, graf dan cara lain yang sesuaiuntuk menjelaskan jawapan anda.

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

6. If you wish to change your answer, cross out the answer that you have done. Then writedown the new answer .

Jika anda hendak menukar jawapan, batalkan jawapan yang telah dibuat. Kemudiantulis jawapan yang baru.

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

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

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

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


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SULIT 4541/3


3

Answer all question

Jawab semua soalan

For ExaminersUse

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

Set up of apparatusSusunan alat radas

Observation of the alkali metalPemerhatian terhadap logam alkali

Set I

Set II

Set III

Diagram 1.1 Rajah 1.1

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

permukaan air, nyalaan, dan bunyi yang terhasil.[3 marks ]

1(a)

3

Water

Air

Water Air

Water Air

Lithium Litium

PotassiumKalium

Sodium Natrium


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SULIT 4541/3

4541/3 2011 Hak Cipta Jabatan Pelajaran Melaka SULIT

4

For ExaminersUse

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

Name of variables Nama pembolehubah

Action to be takenTindakan yang perlu diambil

Manipulated variablePembolehubah dimanipulasi

...

...

...

Method to manipulate variableKaedah memanipulasikan pemboleh ubah

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

.Responding variablePembolehubah bergerak balas

...

...

...

What to observe in the responding variablePerkara yang perlu diperhati dalam

pembolehubah bergerak balas

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

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

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

...

...

...

Method to maintain constant variableKaedah untuk menetapkan pemboleh ubahdimalarkan.............................................................................

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

.[3 + 3 marks ]

1(b)

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

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

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

1(c)

3

6


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SULIT 4541/3


7

For ExaminersUse

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

Set I :

Set II :

Set III : .[3 marks ]

1(g)(i)

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

[3 marks ]

1(g)(ii)

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

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

.[3 marks ]

1(g)(iii)

3

3

3


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SULIT 4541/3

4541/3 2011 Hak Cipta Jabatan Pelajaran Melaka SULIT

8

For ExaminersUse

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

Chemical substance Bahan kimia

pH value Nilai pH

Ammonia solution, NH 3 Larutan ammonia, NH 3

10

Potassium hydroxide solution, KOH Larutan kalium hidroksida KOH 14

Sodium hydroxide solution, NaOH Larutan natrium hidroksida NaOH 13

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

[3 marks ]

1(g)(iv)

3


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4541/3Chemistry 3Oktober2011

JABATAN PELAJARAN MELAKABUKIT BARU, MELAKA

____________________________________________________________

PEPERIKSAAN AKHIR TAHUNTINGKATAN 42011

CHEMISTRY 3

PERATURAN PEMARKAHAN

Skema Pemarkahan ini mengandungi 11 halaman bercetak


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3

Question Details Score

1 (c)

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

responding variable correctly with direction] Sample answer :

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

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

3

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

Sample answer :

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

2

[Able to state an idea of hypothesis]

Sample answer :

Alkali metal have different reactivity. Alkali metal reacts with water

1

[No response given or wrong response] 0

1 (d)

[Able to state two inferences correctly ]

Sample answer : 1. Lithium is the least reactive metal towards water 2. Lithium hydroxide is formed. 3. Hydrogen gas is released 4. Alkali solution is produced

3

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

Sample answer : Reaction occurs 1



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4


1 (e)

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

Sample answer :

Potassium/K, Sodium/Na, Lithium/Li

3

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

Sample answer: Lithium/Li, Potassium/K, Sodium/Na // Sodium/Na, Lithium/Li , Potassium/K

2

[ Able to give an idea to arrange the metals ]

Sample answer: Lithium/Li, Sodium/Na, Potassium/K Potassium/K Lithium/Li, Sodium/Na,Sodium/Na, Potassium/K , Lithium/Li

1


1(f)

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

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

3

[Able to predict the observation for the reaction between rubidium and water]

Sample answer: Rubidium moves vigorously.

2

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

Sample answer: Rubidium is more reactive.

1



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5


1 (g)(i)

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

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

3

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

2

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

1(g)(ii)

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

1. Correct titles2. pH values

Sample answer: Set pH

I 13.1

II 13.4

III 13.6

3

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

Sample answer: pH

I 13.1

II 13.4

III 13.6

2

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


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7


2(a)

Able to give the problem statement accurately and in question form.

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

3

Able to give the statement of the problem correctly.

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

2

Able to give an idea of statement of the problem .

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

1

No response or wrong response 0

2(b)

Able to state all the three variables correctly.

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

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

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

lead(II)bromide and molten naphthalene

3

Able to state any two variables correctly 2

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


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8


2(c)

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

Sample answer:Molten ionic compound / lead(II)bromide can conduct electricity / while molten covalent compound / molten naphthalene cannotconduct electricity

3

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

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

2

Able to state the idea of the hypothesis.

Sample answer:Different compound have different property of electricalconductivity.

1



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9


2(d)

Able to give adequate list of materials and apparatus.

Sample answer:Materials

1 Lead (II) bromide2 Naphthalene

Apparatus1 Crucible2 Batteries3 Bulb4 Switch5 Carbon electrodes6 Tripod stand7 Bunsen Burner8 Pipe-clay triangle9 Connecting wire

3

Able to give a list of materials and apparatus.

Sample answer:Materials

1 Lead (II) bromide2 Naphthalene

Apparatus1 Crucible / Any container2 Batteries3 Bulb/voltmeter/ammeter4 Electrodes5 Bunsen Burner6 Connecting wire

2

Able to give an idea of materials and apparatus.

Sample answer:

MaterialLead (II) bromide / naphthaleneApparatus

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

1



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10


2(e)

Able to state the following steps:

Sample answer:1 Fill a crucible with a solid lead(II)bromide, PbBr 2 until it is

half full.2 Complete the circuit.3 Heat the solid lead(II)bromide until it melts.4 Observe whether the bulbs light up or not.5 Record the observation.6 Repeat steps 1 to 5 / the experiment using naphthalene.

3

Able to state at least the following steps:

Sample answer:Steps 2, 3,5 and 6

2

Able to state at least the following steps:

Sample answer:Step 2, 3 and 5

1



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11


2(f)

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

Sample answer :

Chemical compound ObservationLead(II)bromideNaphthalene

2

Able to construct a table with:

1.

At least one title2. Incomplete list of chemical compound

Sample answer :Observation

lead(II)bromide/ Naphthalene

1


END OF MARK SCHEME

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