2010 chemistry perak(gerak gempur)

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Gerak Gempur SPM Chemistry paper 1 1 Which of the following substances is made up of atoms? Antara berikut, bahan yang manakah terdiri daripada atom? A B C D Iron Ferum Oxygen gas Gas oksigen Naphthalene Naftalena Sodium chloride Natrium klorida 2 The equation below shows the reaction between magnesium and hydrochloric acid, Persamaan di bawah menunjukkan tindakbalas antara magnesium dan asid hidroklorik Mg(s) + 2HCl(aq) MgCl 2 (aq) + H 2 (g) Which of the following statements is true? Antara pernyataan berikut, yang manakah benar? [Relative atomic mass of H = 1. Mg = 24, Cl = 35.5] [Jisim atom relatif H = 1, Mg = 24, Cl = 35.5] A B C D 1 g magnesium react with 2 g hydrochloric acid to produce 1 g magnesium chloride and 1 g hydrogen gas 1 g magnesium bertindak balas dengan 2 g asid hidroklorik menghasilkan 1 g magnesium klorida dan 1 g gas hidrogen 24 g magnesium react with 36.5 g hydrochloric acid to produce 95 g magnesium chloride and 2 g hydrogen gas 24 g magnesium bertindak balas dengan 36.5 g asid hidroklorik menghasilkan 95 g magnesium klorida dan 2 g gas hidrogen 1 mol magnesium react with 2 mol hydrochloric acid to produce 1 mol magnesium chloride and 1 mol hydrogen gas 1 mol magnesium bertindak balas dengan 2 mol asid hidroklorik menghasilkan 1 mol magnesium klorida dan 1 mol gas hidrogen 1 magnesium atom reacts with 2 hydrochloric acid molecule to produce 1 magnesium chloride molecule and 1 hydrogen gas molecule 1 atom magnesium bertindak balas dengan 2 molekul asid hidroklorik menghasilkan 1 molekul magnesium klorida dan 1 molekul gas hidrogen http://chngtuition.blogspot.com

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Page 1: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

1 Which of the following substances is made up of atoms?

Antara berikut, bahan yang manakah terdiri daripada atom?

A

B

C

D

Iron

Ferum

Oxygen gas

Gas oksigen

Naphthalene

Naftalena

Sodium chloride

Natrium klorida

2 The equation below shows the reaction between magnesium and hydrochloric acid,

Persamaan di bawah menunjukkan tindakbalas antara magnesium dan asid hidroklorik

Mg(s) + 2HCl(aq) MgCl2(aq) + H2(g)

Which of the following statements is true?

Antara pernyataan berikut, yang manakah benar?

[Relative atomic mass of H = 1. Mg = 24, Cl = 35.5]

[Jisim atom relatif H = 1, Mg = 24, Cl = 35.5]

A

B

C

D

1 g magnesium react with 2 g hydrochloric acid to produce 1 g magnesium chloride and

1 g hydrogen gas

1 g magnesium bertindak balas dengan 2 g asid hidroklorik menghasilkan 1 g

magnesium klorida dan 1 g gas hidrogen

24 g magnesium react with 36.5 g hydrochloric acid to produce 95 g magnesium chloride

and 2 g hydrogen gas

24 g magnesium bertindak balas dengan 36.5 g asid hidroklorik menghasilkan 95 g

magnesium klorida dan 2 g gas hidrogen

1 mol magnesium react with 2 mol hydrochloric acid to produce 1 mol magnesium

chloride and 1 mol hydrogen gas

1 mol magnesium bertindak balas dengan 2 mol asid hidroklorik menghasilkan 1 mol

magnesium klorida dan 1 mol gas hidrogen

1 magnesium atom reacts with 2 hydrochloric acid molecule to produce 1 magnesium

chloride molecule and 1 hydrogen gas molecule

1 atom magnesium bertindak balas dengan 2 molekul asid hidroklorik menghasilkan 1

molekul magnesium klorida dan 1 molekul gas hidrogen

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Page 2: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

2

3 Which of the following chemists arranged the elements in order of increasing atomic mass in The

Periodic Table ?

Antara ahli kimia berikut, yang manakah menyusun unsur-unsur dalam Jadual Berkala

berdasarkan pertambahan jisim atom?

A

B

C

D

Dmitri Mendeleev

Johann Dobereiner

John Newlands

Henry Moseley

4 Element J has 11 electrons

Unsur J mempunyai 11 elektron.

Which of the following electron arrangements represent ion J?

Antara susunan elektron berikut, yang manakah mewakili ion J?

5 The ions that are present in copper(II) sulphate solution are

Ion-ion yang wujud dalam larutan kuprum(II) sulfat ialah

A

B

C

Cu2+

, SO42-

Cu2+

, SO42-

, H+

Cu

2+, SO4

2-, OH

-

A

D

C

B

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Page 3: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

3

D Cu2+

, SO42-

, H+, OH

-

6 Which of the following is a strong acid?

Antara yang berikut, yang manakah asid kuat?

A

B

C

D

Alkyl sulphonic acid

Asid Alkil sulfonik

Ethanoic acid

Asid etanoik

Palmitic acid

Asid palmitik

Nitric acid

Asid nitrik

7 Which of the following is a salt ?

Antara berikut, yang manakah merupakan garam?

A

B

C

D

Lead (II) oxide

Plumbum(II) oksida

Barium hydroxide

Barium hidroksida

Aluminium nitrate

Aluminium nitrat

Hydrogen sulphate

Hidrogen sulfat

8 Which of the following is true about manufactured substance in industry and its uses?

Antara yang berikut,,yang manakah benar tentang bahan buatan dalam industri dengan

kegunaannya?

Manufactured substance in industry

Bahan Buatan Industri

Uses

Kegunaan

A Polythene

Politena

Lenses

Kanta

B Lead glass

Kaca Plumbum

Mirror

Cermin

C Photochromic glass

Kaca fotokromik

Optical lenses

Kanta cermin mata

D Plastic reinforced with glass

Plastik yang diperkukuhkan dengan kaca

Test tube

Tabung uji

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Page 4: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

4

9 Which of the following statements best explain the decrease in rate of decomposition of

hydrogen peroxide with time?

Antara pernyataan berikut,yang manakah menerangkan pengurangan kadar penguraian

hidrogen peroksida dengan masa ?

A

B

C

D

Product of reaction decreases

Hasil tindak balas berkurang

Temperature of hydrogen peroxide decreases

Suhu hidrogen peroksida berkurang

Volume of hydrogen peroxide decreases

Isipadu hidrogen peroksida berkurang

Concentration of hydrogen peroxide decreases

Kepekatan hidrogen peroksida berkurang

10 Which of the following chemicals is used to keep latex in its liquid state?

Antara bahan kimia berikut, yang manakah digunakan untuk mengekalkan lateks dalam keadaan

cecair?

A

B

C

D

Aqueous ammonia

Ammonia akueous

Ethanoic acid

Asid ethanoik

Methanol

Metanol

Water

Air

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Page 5: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

5

12 What is the meaning of heat of reaction?

Apakah maksud haba tindak balas?

A The energy needed to break the chemical bond

Tenaga yang diperlukan untuk memecahkan ikatan kimia

B The energy needed to start a reaction

Tenaga yang diperlukan untuk memulakan tindak balas

C The energy involved when change of state of matter occurs

Tenaga yang dibebaskan apabila perubahan keadaan bahan berlaku

D The change in the energy contained in the products and in the reactants

Perubahan kandungan tenaga dalam hasil tindak balas dan bahan tindak balas

11 Diagram 1 shows the set up of apparatus for a chemical reaction.

Rajah 1 menunjukkan susunan radas bagi satu tindak balas kimia.

DIAGRAM 1

RAJAH 1

Which of the following statements is true for the reaction?

Antara pernyataan berikut, yang manakah benar mengenai tindak balas itu?

A

B

C

D

Iron is reduced

Ferum diturunkan

Iron is an oxidising agent

Ferum adalah agen pengoksidaan

Magnesium releases electron

Magnesium membebaskan elektron

The oxidation number of magnesium decreases

Nombor pengoksidaan magnesium berkurang

Magnesium strip

Kepingan magnesium

Agar solution

Larutan agar-agar

Iron strip

Kepingan ferum

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Page 6: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

6

13 The body of an aeroplane is made up of alloy X.

Badan sebuah kapalterbang dibina dari sejenis aloi X.

What is the alloy X?

Apakah aloi X itu?

A

B

C

D

Pewter

Piuter

Brass

Loyang

Bronze

Gangsa

Duralumin Duralumin

14 Which of the following is true about the charges of an electron, a neutron and a proton?

Antara yang berikut, yang manakah benar tentang cas-cas bagi elektron, neutron dan proton?

A

B

C

D

Electron

Elektron

Neutron

Neutron

Proton

Proton

Negative

Negatif

Positive

Positif

Neutral

Neutral

Positive

Positif

Neutral

Neutral

Negative

Negatif

Positive

Positif

Negative

Negatif

Neutral

Neutral

Negative

Negatif

Neutral

Neutral

Positive

Positif

15 Which of the following pair of compounds and formulae is correct?

Antara berikut, yang manakah pasangan sebatian dan fomulanya betul?

A

B

C

D

Compound Formula

Sebatian Formula

Sodium sulphate NaSO4 Natrium sulfat

Copper(II) oxide Cu2O

Kuprum(II) oksida

Iron(III) chloride FeCl3

Ferum(III) klorida

Zinc nitrate Zn(NO2)3

Zink nitrat

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Page 7: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

7

16 Astatine is below iodine in Group 17 of Periodic Table. Astatine terletak di bawah iodin dalam Kumpulan17 Jadual Berkala.

Which of the following statements is true for astatine?

Antara pernyataan berikut, yang manakah benar tentang astatine?

A

B

C

D

Form basic oxide

Membentuk oksida alkali

Exists as monoatom

Wujud sebagai monoatom

Solid at room temperature

Pepejal pada suhu bilik

More electronegativity than iodine

Lebih elektronegatif daripada iodin

17 The diagram 2 shows the electron arrangement of a molecule of water ,H2 O

Rajah 2 menunjukkan susunan elektron bagi molekul air ,H2O

DIAGRAM 2

RAJAH 2

Which of the following statements is true about the molecule?

Antara pernyataan berikut, yang manakah benar tentang molekul itu ?

A

B

C

D

The compound has high melting point

Sebatian mempunyai takat lebur yang tinggi

Oxygen atom ,O has four pairs of electrons to share

Atom oksigen, O mempunyai empat pasang elektron untuk di kongsi

The bonding between molecules of water, H2 O is of Van der Waals forces

Ikatan antara molekul air, H2 O ialah daya Van der Waals

Each oxygen atom , O receives two electrons to form an oxide ion

Setiap atom oksigen, O menerima dua elektron untuk membentuk satu ion oksida.

H O H

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Page 8: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

8

18 The diagram 3 shows the set up of the apparatus of a simple chemical cell.

The reading on the voltmeter is 0.5 V.

Rajah 3 menunjukkan satu radas bagi satu sel kimia yang ringkas.

Bacaan pada voltmeter ialah 0.5 V.

DIAGRAM 3

RAJAH 3

Which of the following will give the biggest increment in the reading on the voltmeter?

Antara berikut, yang manakah akan meningkatkan bacaan paling tinggi pada voltmeter?

A

B

C

D

Increase the volume of iron(II) sulphate solution

Tambahkan isipadu ferum(II) sulfat

Substitute the iron plate with a silver plate

Gantikan kepingan ferum dengan kepingan argentum

Use a more dilute iron(II) sulphate solution

Gunakan larutan ferum(II) sulfat yang lebih cair

Substitute the zink plate with an aluminium plate

Gantikan kepingan zink dengan kepingan aluminium

19

Which of the following is true about alloy and its major component?

Antara berikut yang manakah benar tentang aloi dan juzuk utamanya

Alloy

Aloi

Major component

Komponen utama

A Duralumin

Duralumin

Magnesium

Magnesium

B Steel

Keluli

Tin

Stanum

C Bronze

Gangsa

Copper

Kuprum

D Pewter

Piuter

Zinc

Zink

Iron(II) sulphate solution

Larutan ferum(II) sulfat

Iron plate

Kepingan

ferum

Zinc plate

Kepingan zink

0.5V

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Page 9: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

9

20

Which of the following solutions contain the same number of hydrogen ion, H+?

Antara larutan berikut, yang manakah mengandungi bilangan ion hidrogen, H+ yang sama?

[Avogadro number = 6.02 x 1023

mol-1

]

[Nombor Avogadro = 6.02 x 1023

mol-1

]

I

II

III

IV

A

B

C

D

50 cm3 of 1.0 mol dm

-3 of nitric acid

50 cm3 of 1.0 mol dm

-3 acid nitrik

100 cm3 of 0.5 mol dm

-3 of hydrochloric acid

100 cm3 of 0.5 mol dm

-3 acid hidroklorik

25 cm3 of 1.0 mol dm

-3 of sulphuric acid

25 cm3 of 1.0 mol dm

-3 acid sulfurik

200 cm3 of 0.5 mol dm

-3 of ethanoic acid

200 cm3 of 0.5 mol dm

-3 acid etanoik

I and III only

I dan III sahaja

II and IV only

II dan IV sahaja

I, II and III only

I, II dan III sahaja

II, III and IV only

II, III dan IV sahajay

21

Which of the following explains the meaning of effective collision?

Antara pernyataan berikut, yang manakah menjelaskan maksud perlanggaran berkesan?

A

B

C

D

The collision that causes a reaction

Perlanggaran yang menghasilkan tindak balas

The collision that has a low energy

Perlanggaran yang mempunyai tenaga yang rendah

The collision which takes place before a reaction

Perlanggaran yang berlaku sebelum sesuatu tindak balas

The collision where its energy is less than the activation energy

Perlanggaran yang tenaganya kurang daripada tenaga pengaktifan

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Page 10: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

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22

Diagram 4 shows the set of apparatus of an experiment.

Rajah 4 menunjukkan susunan radas bagi satu eksperimen.

DIAGRAM 4

RAJAH 4

Which of the following can be used to differentiate these solutions?

Antara yang berikut, yang manakah boleh digunakan untuk membezakan larutan-larutan

tersebut ?

A

B

C

D

Ammonia solution

Larutan ammonia

Barium nitrate solution

Larutan barium nitrat

Silver nitrate solution

Larutan argentum nitrat

Sodium hydroxide solution

Larutan natrium hidroksida

23 Diagram 5 represents the structural formula of a carbon compound

Rajah 5 menunjukkan formula struktur satu sebatian karbon

DIAGRAM 5

RAJAH 5

Name of the above carbon compound is

Nama sebatian karbon di atas ialah

A

B

C

D

Ethyl ethanoate

Etil etanoat

Propil ethanoate

Propil etanoat

Ethyl propanoate

Etil propanoat

Diethyl methanoate

Dietil etanoat

H H O H H

| | || | |

H – C – C – C – O – C – C – H

| | | |

H H H H

Aluminium chloride solution

Larutan Aluminium klorida

Zinc chloride solution

Larutan zink klorida

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Page 11: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

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24 Which of the following reactions shows that tin is a reducing agent?

Antara tindak balas kimia berikut, yang manakah menunjukkan stanum sebagai agen

penurunan?

I

II

III

IV

A

B

C

D

Reaction of tin with silver oxide

Tindak balas stanum dengan argentum oksida

Reaction of tin with lead(II) nitrate solution

Tindak balas stanum dengan larutan Plumbum(II) nitrat

Electrolysis of tin(II) nitrate solution using tin electrodes

Elektrolisis larutan stanum(II) nitrat dengan menggunakan elektrod stanum

Chemical cell with tin and zinc electrodes in sodium sulphate solution.

Sel Kimia yang menggunakan elektrod stanum dan zink dalam larutan natrium sulfat.

I and II only

I dan II sahaja

II and IV only

II dan IV sahaja

I, II and III only

I, II dan III sahaja

I, III and IV only

I, III dan IV sahaja

25 The following chemical equation shows the reaction of the formation of lead (II) sulphate

precipitate.

Persamaan kimia berikut menunjukkan tindak balas pembentukan mendakan plumbum (II) sulfat.

Pb2+

(ak) + SO4 2-

(ak) → PbSO4 (p) ∆ H = - 42 kJ mol -1

Which of the following is true about the reaction?

Antara yang berikut, yang manakah benar tentang tindak balas itu?

Heat change

Perubahan haba

Type of reaction

Jenis tindak balas

A Heat is released

Haba dibebaskan

Endothermic

Endotermik

B Heat is absorbed

Haba diserap

Exothermic

Eksotermik

C Heat is released

Haba dibebaskan

Exothermic

Eksotermik

D Heat is absorbed

Haba diserap

Endothermic

Endotermik

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Page 12: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

12

26 Which of the following molecules is soap?

Antara molekul berikut, yang manakah merupakan sabun?

A

B

C

D

CH3(CH2)14COOH

CH3(CH2)2COONa

CH3(CH2)14COONa

CH3(CH2)14COOCH3

27 The diagram 6 shows the cooling curve for a sample of a pure substance X

Rajah 6 menunjukkan lengkuk penyejukan bagi satu contoh bahan X yang tulin.

DIAGRAM 6

RAJAH 6

Which of the following statements is true about the arrangement of particles at time t?

Antara berikut, yang manakah pernyataan yang benar tentang susunan zarah-zarah pada

masa t?

A

B

C

D

All the molecules move freely

Semua zarah bergerak bebas

All the molecules only vibrate and rotate at their fixed position

Semua zarah hanya bergetar dan berputar pada kedudukan yang tetap

Some of the molecules move from one point to another and the others move randomly

Sebahagian zarah bergerak dari satu tempat ke tempat yang lain dan yang lainnya

bergerak bebas

Some of the molecules vibrate and rotate at their fixed positions and the others move

from one point to another

Sebahagian zarah bergetar dan berputar pada kedudukan yang tetap dan yang lainnya

bergerak dari satu tempat ke tempat yang lain

t

Temperature/oC

Time/s

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Page 13: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry paper 1

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28 Diagram 7 shows the molecular formulae of two compounds, X and Y

Rajah 7 menunjukkan formula molekul bagi dua sebatian, X dan Y.

Compound X Compound Y

Sebatian X Sebatian Y

DIAGRAM 7

RAJAH 7

Which of the following statements are similar for compound X and Y?

Antara pernyataan berikut, yang manakah sama bagi sebatian X dan Y?

A

B

C

D

The empirical formula

Formula empirik

Reaction with bromine water

Bertindak balas dengan air bromine

Hydration to produce an alcohol

Penghidratan menghasilkan suatu alkohol

Complete combustion in oxygen to produce water and carbon dioxide gas

Pembakaran sempurna dalam oksigen menghasilkan air dan gas karbon dioksida

29 Table 1 shows the proton number of elements W,X,Y and Z.

The letters used are not the actual symbol of the elements.

Jadual 1 menunjukkan nombor proton bagi unsur-unsur W,X,Y ,dan Z.

Huruf yang digunakan bukan simbol sebenar unsur itu.

TABLE 1

JADUAL 1

Which of the following shows the ascending order of the atomic size of the elements?

Antara ynag berikut yang manakah menunjukkan susunan menaik saiz atom bagi unsur-unsur

itu?

Element

Unsur

Proton number

Nombor proton

W

X

Y

Z

11

13

17

19

A

B

C

D

W,X,Y,Z

Z,W,X,Y

Y,X,W,Z

Z,Y,X,W

C2H6

C5H10

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Page 14: 2010 Chemistry Perak(Gerak Gempur)

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30 Which of the following is true about covalent compound?

Antara berikut, yang manakah benar tentang sebatian kovalen?

A

B

C

D

Conduct electricity in molten or aqueous state

Mengalir elektrik dalam keadaan lebur atau akueus

Low melting point

Takat lebur rendah

Soluble in water

Larut dalam air

Not volatile

Tidak meruap

31 Diagram 8 shows a set up of chemical cell using a pair of zinc and copper as electrodes.

Rajah 8 menunjukkan susunan radas sel kimia menggunakan pasangan elektrod zink dan

kuprum.

DIAGRAM 8

RAJAH 8

The blue copper(II) sulphate solution turns pale.

Warna biru larutan kuprum(II) sulfat luntur

Which of the following explains the observation?

Antara pernyataan berikut yang manakah menerangkan pemerhatian itu?

A

B

C

D

Zinc atom ionizes

Atom zink mengion

Copper atom ionizes

Atom kuprum mengion

Sulphate ion is discharged

Ion sulfat dinyahscas

Copper(II) ion is discharged

Ion kuprum(II) dinyahcas

Copper(II) sulphate solution

Larutan kuprum(II) sulfat

Zinc

Zink

Copper

kuprum

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Page 15: 2010 Chemistry Perak(Gerak Gempur)

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32

Which of the following explains the above statement?

Antara berikut, yang manakah menerangkan pernyataan di atas?

A

B

C

D

Hydrochloric acid is a weak acid while ethanoic acid is a strong acid

Asid hidroklorik ialah asid lemah sementara asid etanoik ialah asid kuat

Hydrochloric acid dissociates partially while ethanoic acid dissociates completely in

water

Asid hidroklorik bercerai separa sementara asid etanoik bercerai sempurna di dalam

air

The number of hydrogen atom in hydrochloric acid is smaller than in ethanoic acid

Bilangan atom hidrogen di dalam asid hidroklorik lebih kecil berbanding di dalam asid

etanoik

The concentration of hydrogen ion in hydrochloric acid is higher than in ethanoic acid

Kepekatan ion hidrogen di dalam asid hidroklorik adalah lebih tinggi berbanding di

dalam asid etanoik

33 The following equation shows the preparation of salt R.

Persamaan berikut menunjukkan penyediaan garam R

Solution P + Solution Q Solid R + Solution S

Larutan P + Larutan Q Pepejal R + Larutan S

Which of the following set represents compound P,Q,R and S?

Antara set berikut, yang manakah merupakan sebatian P,Q,R dan S?

P Q R S

I Pb NaBr PbBr2 Na II Ca(NO)3 K2SO4 CaSO4 KNO3

III AgNO3 NaCl AgCl NaNO3

IV NH4OH HCl NH4Cl H2O

A I and II only

I dan II sahaja

B I and IV only

I dan IV sahaja

C II and III only

II and III sahaja

D III and IV only

III and IV sahaja

The pH value of 0.1 mol dm-3

hydrochloric acid,HCl is smaller than

the pH value of 0.1 mol dm-3

ethanoic acid, CH3COOH

Nilai pH bagi 0.1 mol dm-3

asid hidroklorik, HCl adalah lebih kecil berbanding

dengan nilai pH bagi 0.1 mol dm-3

asid etanoik, CH3COOH

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Page 16: 2010 Chemistry Perak(Gerak Gempur)

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34 The manufacturing of sulfuric acid involves several reactions.

Pembuatan asid sulfurik melibatkan beberapa tindak balas.

Which of the following equations represents the sulfuric acid reaction that uses a catalyst?

Antara persamaan berikut, yang manakah mewakili tindak balas asid sulfurik yang

menggunakan mangkin?

A

B

C

D

S + O2 → SO2

2SO2 + O2 → 2SO3

SO3 + H2SO4 → H2S2O7

H2S2O7 + H2 O → 2H2SO4

35 Diagram 9 shows the graph of volume of oxygen gas against time . Curve P is obtained from an

experiment of the decomposition of 25 cm3 of 0.1 mol dm

-3 hydrogen peroxide solution.

Rajah 9 menunjukkan graf isipadu gas oksigen melawan masa. Lengkung P diperolehi daripada

tindak balas penguraian 25 cm3 larutan hidrogen peroksida 0.2 mol dm

-3.

DIAGRAM 9

RAJAH 9

Which of the following solutions will produce curve Q?

Antara larutan berikut, yang manakah akan menghasilkan lengkung Q?

A

B

C

D

25 cm3 hydrogen peroxide 0.15 mol dm

-3

25 cm3 hydrogen peroxide 0.15 mol dm

-3

20 cm3 hydrogen peroxide 0.15 mol dm

-3

20 cm3 hydrogen peroxide 0.15 mol dm

-3

15 cm3 hydrogen peroxide 0.15 mol dm

-3

15 cm3 hydrogen peroxide 0.15 mol dm

-3

10 cm3 hydrogen peroxide 0.25 mol dm

-3

10 cm3 hydrogen peroxide 0.25 mol dm

-3

P

Q

Time/s

Masa/s

Volume of O2 gas/cm3

Isipadu gas O2 /cm3

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36 The equation below shows the chemical equation of the combustion of ethanol in excess oxygen

Persamaan di bawah menunjukkan persamaan kimia bagi pembakaran etanol dalam oksigen

berlebihan

2C2H5OH + 7O2 4CO2 + 6H2O

What is the volume of carbon dioxide gas released when 9.20 g ethanol reacts completely?

Berapakah isi padu gas karbon dioksida terbebas apabila 9.2 g etanol bertindak balas lengkap?

[Relative atomic mass of H = 1, C = 12, O = 16, 1 mol of gas occupies 24 dm3 at room

condition]

[Jisim atom relatif H = 1, C = 12, O = 16, 1 mol of gas memenuhi 24 dm3 pada keadaan bilik]

A

B

C

D

4.8 cm3

9.6 cm3

96.0 cm3

9600 cm3

37

Diagram 10 shows the set up of the apparatus to study the redox reaction .

Rajah 10 menunjukkan susunan radas untuk mengkaji tindak balas redoks.

DIAGRAM 10

RAJAH 10

Carbon X is a negative terminal.

Karbon X merupakan terminal negatif.

Which of the following are solution X and solution Y?

Antara berikut, yang manakah merupakan larutan X dan larutan Y?

Solution X

Larutan X

Solution Y

Larutan Y

A Iron(II) sulphate

Ferum(II) sulfat

Bromine water

Air bromin

B Iron(III) sulphate

Ferum(III) sulfat

Potassium bromide

Kalium bomida

C Acidified potassium dicromate(VI)

Kalium dikromat(VI) berasid

Potassium chloride

Kalium klorida

D Acidified potassium manganat(VII)

Kalium manganat(VII) berasid

Iron(II) sulphate

Ferum(II) sulfat

Carbon Y

Karbon Y

Porous pot

Pasu telap

Solution X

Larutan X

Carbon X

Karbon X

Solution Y

Larutan Y

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38 The reaction between 25.00 cm3 of hydrochloric acid and 25.00 cm

3 of sodium hydroxide

solution releases the heat of 2100 J.

[Specific heat capacity of a solution = 4.2 J g-1 o

C -1

Assume that 1 cm 3 of a solution is equal to 1 g of the solution ]

Tindak balas antara 25.00 cm3 asid hidroklorik dan 25.00 cm

3 larutan natrium hidroksida

membebaskan haba sebanyak 2100 J.

[Muatan haba tentu larutan = 4.2 J g-1 o

C -1

Anggap 1 cm 3 larutan sama dengan 1 g larutan ]

What is the temperature change of the mixture ?

Berapakah perubahan suhu campuran itu?

A

B

C

D

1 OC

2 OC

10 OC

20 OC

39 Which of the following is true about soap or detergent ?

Antara yang berikut, yang manakah benar tentang sabun atau detergen ?

A

B

C

D

Soap forms scum in soft water

Sabun membentuk kekat dalam air lembut

Detergent forms scum in hard water

Detergen membentuk kekat di dalam air liat

The presence of magnesium ions in detergent forms scum

Kehadiran ion magnesium di dalam detergen membentuk kekat

Scum decreases the effectiveness of the cleansing action of a soap

Kekat mengurangkan keberkesanan tindakan pencucian sabun

40 Bromine-79 has 44 neutrons.

Bromin-79 mempunyai 44 neutron

Which of the following symbols represent the bromine atom?

Antara simbol berikut, yang manakah mewakili atom bromin?

A

B

C

D

79

35 Br

44 Br

35

79

44 Br

79

35 Br

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41

What is the empirical formula of metal oxide J?

Apakah formula empirik bagi oksida logam J?

[Relative atomic mass of J = 24, O = 16 ]

[Jisim atom relatif: J = 24, O = 16 ]

A

B

C

D

JO

JO2

J2O

J2O2

42 In the Periodic Table, element X is in group 1 and element Y is in group 17

The letters used are not the actual symbol of the elements.

Dalam Jadual Berkala Unsur, unsur X berada dalam kumpulan I dan unsur Y berada dalam

kumpulan 17.

Huruf yang digunakan bukan simbol sebenar unsur itu.

Which of the following chemical equation is true for the reaction between element X and element

Y?

Antara persamaan kimia berikut, yang manakah benar bagi tindak balas antara unsur X dan

unsur Y?

A

B

C

D

2X + Y2 2 XY

X + Y2 XY2

2X + Y X2Y

X + Y XY

43 The table 2 shows the electron arrangements of elements R, S, T dan U.

Jadual 2 menunjukkan susunan elektron bagi unsur R, S, T dan U

Which of the following pair of elements can form ionic compound?

Antara pasangan unsur berikut, yang manakah boleh membentuk sebatian ion?

Elements

Unsur R S T U

Electron arrangement

Susunan elektron 2.4 2.8 2.8.7 2.8.8.2

A

B

C

D

R and S

R dan S

S and U

S dan U

T and U

T dan U

R and T R dan T

2.0 g metal oxide J contains 1.2 g of element J

2.0 g oksida logam J mengandungi 1.2 g logam J

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44 The reaction between hydrochloric acid and calcium carbonate produces carbon dioxide gas. The

reaction is complete in 50 seconds and the maximum volume of gas produced is 25 cm 3.

Tindakbalas antara asid hidroklorik dengan kalsium kabonat menghasilkan gas karbon dioksida.

Tindak balas lengkap dalam masa 50 saat dan isipadu maksimum gas ialah 25 cm3.

What is the average rate of reaction?

Berapakah kadar tindak balas purata?

A

B

C

D

0.5 cm3 s

-1

1.0 cm3 s

-1

2.0 cm3 s

-1

4.0 cm3 s

-1

45 Diagram 11 shows the set-up of apparatus for the titration of sodium hydroxide solution with

sulphuric acid.

Rajah11 menunjukkan susunan radas bagi titratan larutan natrium hidroksida dengan asid

sulfurik

DIAGRAM 11

RAJAH 11

What is the volume of 0.5 mol dm-3

of sulphuric acid solution required to completely neutralize

25 cm3 of 0.5 mol dm

-3 sodium hydroxide solution?

Berapakah isi padu 0.5 mol dm-3

asid sulfurik diperlukan untuk meneutralkan lengkap 25 cm3

0.5 mol dm-3

larutan natrium hidroksida?

A

B

C

D

12.50 cm3

25.00 cm3

50.00 cm3

75.50 cm3

0.5 mol dm-3

of sulphuric acid solution

Larutan 0.5 mol dm-3

asid sulfurik

25 cm3 of 0.5 mol dm

-3 sodium hydroxide +

phenolphthalein

25 cm3 0.5 mol dm

-3 larutan natrium hidroksida

+ fenolftalein

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46

The following chemical equation shows the reaction of preparation lead(II) iodide salt.

Persamaan kimia berikut menunjukkan tindak balas penyediaan garam plumbum(II) iodida.

Pb (NO3)2 (aq) + 2KI(aq) PbI2 (s) + 2KNO3(aq)

Pb (NO3)2 (ak) + 2KI(ak) PbI2 (p) + 2KNO3(ak)

What is the volume of potassium iodide 0.5 mol dm-3

solution needed to produce 4.61 g lead(II)

iodide salt?

Berapakah isipadu larutan kalium iodida 0.5 mol dm-3

yang diperlukan untuk menghasilkan

4.61g garam plumbum(II) iodida?

[Relative atomic mass of Pb= 207, I= 127]

[Jisim atom relatif P= 207, I= 127]

A

B

C

D

20 cm3

40 cm3

400 cm3

1440 cm3

47 Diagram 12 shows the stages I, II, III and IV in the Contact Process during the preparation of

sulphuric acid.

Rajah 12 menunjukkan peringkat I, II, III dan IV bagi penyediaan asid sulfurik melalui proses

Sentuh.

S I SO2 II SO3 III H2S 2O7 IV H2SO4

Which of the following chemicals is used at each stage?

Antara bahan kimia berikut, yang manakah digunakan pada peringkat itu?

I II III IV

A O2 O2 H2O H2SO4

B O2 O2 H2SO4 H2O

C O2 H2O O2 H2SO4

D H2O O2 H2SO4 O2

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48 Diagram 13 shows the set up of the apparatus for an experiment to determine the rate of reaction

between sodium thiosulphate solution and sulphuric acid solution.

Rajah 13 menunjukkan susunan radas bagi eksperimen untuk menentukan kadar tindak balas

antara natrium tiosulfat dengan asid sulfurik.

DIAGRAM 13

RAJAH 13

Which of the following combination of conditions take the longest time for the mark X to disappear

from sight?

Antara kombinasi keadaan berikut, yang manakah mengambil masa paling lama untuk tanda X

hilang daripada penglihatan?

A

B

C

D

Sulphuric acid solution

Larutan asid Sulfurik

Sodium thiosulphate solution

Larutan natrium tiosulfat

Temperature/ 0C

Suhu/0C

Volume/cm3

Isipadu/cm3

Concentration/

mol dm-3

Kepekatan/

mol dm-3

Volume/cm3

Isipadu/cm3

Concentration/

mol dm-3

Kepekatan/

mol dm-3

10

10

10

20

1.0

1.0

0.5

0.5

50

50

50

40

0.5

0.5

0.5

0.5

30

40

30

40

Sodium thiosulphate solution and sulphuric acid

Larutan natrium tiosulfat dan asid sulfurik

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23

49 Diagram 14 shows the structural formula of carbon compound J

Rajah 14 di bawah menunjukkan formula struktur sebatian karbon J

DIAGRAM 14

RAJAH 14

Which of the following statements are true?

Antara pernyataan berikut, yang manakah benar?

[Relative atomic mass of H = 1, C = 12 ]

[Jisim atom relatif H = 1, C = 12 ]

I

II

III

IV

A

B

C

D

Empirical formula of J is C4H8

Formula empirik J ialah C4H8

Name of the compound J is but-1-ene

Nama sebatian J ialah but-1-ena

Hydration of compoud J produce butan-1ol

Penghidratan sebatian J menghasilkan butan-1-ol

Complete combustion of compound J produce carbon dioxide gas and water

Pembakaran lengkap sebatian J menghasilkan gas karbon dioksida dan air

I and II only

I dan II sahaja

III and IV only

III dan IV sahaja

I, II and III only

I, II dan III sahaja

II, III and IV only

II, III dan IV sahaja

H H H H

| | | |

H – C – C – C = C – H

| |

H H

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24

50

Metal W is between iron and copper in the reactivity series of metal.

The letters used are not the actual symbol of the elements.

Logam W berada di antara ferum dan kuprum dalam siri kereaktifan logam.

Huruf yang digunakan bukan simbol sebenar unsur itu

Which of the following metal oxides can be reduced by metal W?

Antara oksida logam berikut, yang manakah boleh diturunkan oleh logam W?

A

B

C

D

Zinc oxide

Zink oksida

Silver oxide

Argentum oksida

Magnesium oxide

Magnesium oksida

Aluminium oxide

Aluminium oksida

END OF QUESTION PAPER

KERTAS SOALAN TAMAT

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Page 25: 2010 Chemistry Perak(Gerak Gempur)

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1. Table 1 shows proton number and nucleon number for atom W, X and Y.

Jadual 1 menunjukkan nombor proton dan nombor nukleon bagi atom W, X dan Y.

Atom Proton number /

Nombor Proton

Nucleon number /

Nombor Nukleon

W 11 23

X 17 35

Y 17 37

TABLE / JADUAL 1

(a) (i) What is meant by proton number?

Apakah yang dimaksudkan dengan nombor proton ?

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

[1 mark]

(ii) What is the number of neutron in atom W ?

Apakah bilangan neutron dalam atom W?

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

[1 mark]

(b) Which atoms are isotopes? Explain why.

Atom – atom yang manakah adalah isotop? Jelaskan mengapa.

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

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

[2 marks]

(c) Write the electron arrangement of atom X .

Tuliskan susunan elektron bagi atom X.

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

[1 mark]

(d) (i) Draw the electron arrangement of atom Y. In your diagram , show the

number of proton and the number of neutron in the nucleus.

Lukiskan susunan elektron atom Y. Dalam rajah anda, tunjukkan

bilangan proton dan bilangan neutron dalam nukleus.

[2 marks]

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3

(ii) What is the number of valence electron of atom Y?

Apakah bilangan elektron valen bagi atom Y?

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

[1 mark]

(iii) Write the formula of ion Y.

Tuliskan formula ion Y.

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

[1 mark]

(e) Write the symbol of atom X in the form of X A

Z .

Tuliskan simbol bagi atom X dalam bentuk X A

Z .

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

[1 mark]

2 Diagram 2 shows the symbols of atom for element U, V, W and X.

Rajah 2 menunjukkan simbol- simbol atom bagi unsur U, V, W dan X.

U7

3 V 12

6 W 19

9 X 20

10

DIAGRAM / RAJAH 2

(a) Write the electron arrangement of atom W.

Tuliskan susunan elektron bagi atom W.

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

[1 mark]

(b) (i) Element U, V, W and X are placed in the same period in the Periodic Table.

State the period.

Unsur U, V, W dan X berada dalam kala yang sama dalam Jadual Berkala.

Nyatakan kala itu.

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

[1 mark]

(ii) Compare the atomic size of element V and X.

Bandingkan saiz atom unsur V dan X.

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

[1 mark]

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4

(iii) Explain your answer in (b) (ii)

Terangkan jawapan anda dalam (b) (ii).

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

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

[2 marks ]

(c) Element V can react with element W to form a compound.

Unsur V boleh bertindak balas dengan unsur W membentuk satu sebatian.

(i) Write the chemical formula for the compound.

Tuliskan formula kimia bagi sebatian itu.

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

[1 mark ]

(ii) State one physical property for the compound formed.

Nyatakan satu sifat fizikal bagi sebatian yang terbentuk.

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

[1 mark ]

(d) When element U react with element W, a compound is produced.

Apabila unsur U bertindak balas dengan unsur W, satu sebatian terhasil.

(i) State the type of the compound produced.

Nyatakan jenis sebatian yang terhasil.

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

[1 mark ]

(ii) Draw the electron arrangement for the compound in (d) (i).

Lukiskan susunan elektron bagi sebatian dalam (d) (i).

[2 marks]

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Page 28: 2010 Chemistry Perak(Gerak Gempur)

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3 Diagram 3 shows the set-up of apparatus of a voltaic cell.

Rajah 3 menunjukkan susunan radas satu sel kimia.

DIAGRAM / RAJAH 3.1

Based on Diagram 3 , answer the following questions.

Berdasarkan Rajah 3, jawab soalan- soalan berikut:

(a) What is the energy change that occurs in the voltaic cell?

Apakah perubahan tenaga yang berlaku dalam sel kimia?

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

[1 mark]

(b) Write the formula of all ions in copper (II) sulphate solution.

Tuliskan formula semua ion dalam larutan kuprum (II) sulfat.

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

[1 mark]

(c) (i) Name the negative terminal of the voltaic cell.

Namakan terminal negatif bagi sel kimia.

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

[1 mark]

(ii) Explain your answer in (b)(i).

Terangkan jawapan anda dalam (b)(i).

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

[1 mark]

(d) (i) State one observation at copper plate.

Nyatakan satu pemerhatian pada kepingan kuprum.

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

[1 mark]

Copper (II) nitrate solution /

Larutan kuprum (II) nitrat

Copper plate / Kepingan kuprum

Zinc

Plate /

Kepingan

zink

V

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Page 29: 2010 Chemistry Perak(Gerak Gempur)

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(ii) Write the half equation for the reaction occur at the copper plate.

Tuliskan persamaan setengah bagi tindak balas yang berlaku pada

kepingan kuprum.

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

[1 mark]

(e) What is the colour change of the copper(II)sulphate solution? Explain your

answer.

Apakah perubahan warna larutan kuprum (II) sulfat ? Jelaskan jawapan anda.

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

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

[2 marks]

(f) Another experiment is carried out by replacing the zinc plate with P , Q and R

metals.

Table 3.2 shows the results.

Eksperimen lain dijalankan bagi menggantikan kepingan zink dengan logam P,

Q dan R.

Jadual 3.2 menunjukkan keputusannya.

Pair of metal/

Pasangan logam

Voltage/

Voltan (V)

Negative terminal/

Terminal negative

P/Cu 2.7 P

Q/Cu 2.0 Q

R/Cu 0.5 R

TABLE/ JADUAL 3.2

(i) Arrange P, Q, R and Cu metal in accending order of electropositivity.

Susunkan logam P, Q, R dan Cu mengikut tertib menaik keelektropositifan.

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

[1 mark]

(ii) Predict the voltage for pair of Q/R.

Ramalkan nilai voltan bagi pasangan Q/R

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

[1 mark]

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4 (a) Diagram 4.1 shows the set-up of apparatus to prepare soap.

Rajah 4.1 menunjukkan susunan radas untuk menyediakan sabun.

DIAGRAM / RAJAH 4.1

(i) Name the process of preparing soap.

Namakan proses penyediaan sabun.

…………………………………………………………………………….

[1 mark]

(ii) Name the solution P.

Namakan larutan P.

…………………………………………………………………………….

[1 mark]

(iii) State the purpose of adding sodium chloride to the reaction mixture in

the experiment.

Nyatakan tujuan menambahkan natrium klorida kepada campuran

tindak balas dalam eksperimen itu.

…………………………………………………………………………….

[1 mark]

(iv) Diagram 4.2 shows the structure of a soap ion.

Rajah 4.2 menunjukkan struktur satu ion sabun.

Part / Bahagian X Part/ Bahagian Y

DIAGRAM/RAJAH 4.2

Which part is soluble in the water and grease based on Diagram 4.2?

Bahagian manakah yang larut dalam air dan gris berdasarkan

CH 2

CH3

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2

CH2 CH2

C-O- ||

O

Heat /

Panaskan

Palm oil /

Minyak sawit

+

Solution/ Larutan P

Distilled water / Air suling

+

Sodium chloride / Natrium klorida

Cool/ Sejukkan Mixture/

Larutan

Soap/

Sabun

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Rajah 4.2?

Water/air: …………………………………………………………………

Grease/gris: ……………………………………………………………….

[1 mark]

(b) Glass and ceramic are widely used in our daily life.

Kaca dan seramik digunakan secara meluas dalam kehidupan harian.

(i) Name a chemical of the main component of glass and ceramic

Namakan bahan kimia yang menjadi bahan utama dalam kaca dan

seramik

…………………………………………………………………………….

[1 mark]

(ii) State a reason why glass is used as laboratory apparatus instead of metal.

Nyatakan satu alasan mengapa kaca digunakan sebagai radas makmal

bukannya logam.

……………………………………………………………………………

[1 mark]

(iii)

Test tube Beaker Combustion tube

Tabung uji Bikar Tiub Pembakaran

DIAGRAM/RAJAH 4.3

State the type of glass that used in making the apparatus in Diagram 4.3

Nyatakan jenis kaca yang digunakan untuk membuat alat radas dalam

Rajah 4.3

……………………………………………………………………………

[1 mark]

(c) Photo chromic glass is a composite material.

Kaca fotokromik adalah salah satu bahan komposit

(i) What is composite material?

Apakah bahan komposit?

…………………………………………………………………………….

[1 mark]

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Page 32: 2010 Chemistry Perak(Gerak Gempur)

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9

(ii) Name one of the component in photo chromic glass?

Namakan salah satu daripada komposisi dalam kaca fotokromik?

…………………………………………………………………………….

[1 mark]

(iii) State one of the characteristic of lenses made from photo chromic glass.

Nyatakan satu ciri lensa yang diperbuat daripada kaca fotokromik.

…………………………………………………………………………….

[1 mark]

5 Table 5 shows the formulae of three organic compounds.

Jadual 5 menunjukkan formula bagi tiga sebatian organik

Organic compound

Sebatian organik

Formula

Formula

Butan-1-ol

Butan-1-ol C4H10O

Butanoic acid

Asid Butanoik C4H8O2

But-1-ene

But-1-ena C4H8

TABLE / JADUAL 5

Use the information in Table 5 to answer the following questions.

Gunakan maklumat dalam Jadual 5 untuk menjawab soalan berikut.

(a) Name the homologous series for butan-1-ol.

Namakan siri homolog bagi butan-1-ol

……………………………………………………………………………………..

[ 1 mark ]

(b) (i) Draw the structural formula of butan-1-ol

Lukiskan formula struktur bagi butan-1-ol

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10

[ 1 mark ]

(ii) The following structural formula is isomer of butanol.

Formula struktur berikut ialah isomer bagi butanol

CH3

CH3 - C - CH3

OH

Name the isomer.

Namakan isomer itu.

…………………………………………………………………………….

[ 1 mark ]

(c ) Butan-1-ol can react with butanoic acid to form compound X and water.

Butan-1-ol boleh bertindak balas dengan asid butanoik untuk menghasilkan

sebatian X dan air.

(i) What is the name of this reaction?

Apakah nama tindak balas ini.

…………………………………………………………………………….

[ 1 mark ]

(ii) Write the chemical equation for the reaction.

Tuliskan persamaan kimia bagi tindak balas itu.

…………………………………………………………………………….

[ 1 mark ]

(iii) State one physical property of compound X.

Nyatakan satu sifat fizik bagi sebatian X.

…………………………………………………………………………….

[ 1 mark ]

(d) Dehydration of butan-1-ol using porous pot chips produce but-1-ene.

Draw the set up of apparatus used in the dehydration.

Pengdehidratan butan-1-ol menggunakan serpihan pasu berliang menghasilkan

but-1-ena. Lukiskan susunan radas yang digunakan dalam pengdehidratan itu.

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[ 2 marks ]

(e) When but-1-ene is mixed with bromine water , a reaction occur.

Apabila but-1-ena dicampurkan dengan air bromin , satu tindak balas berlaku.

(i) Name the reaction .

Namakan tindak balas itu.

…………………………………………………………………………….

[ 1 mark ]

(ii) State one observation in the reaction.

Nyatakan satu pemerhatian dalam tindak balas itu.

…………………………………………………………………………….

[ 1 mark ]

6 Diagram 6 shows the set- up of apparatus to investigate the reaction between potassium

iodide solution and chlorine water through the transfer of electrons at a distance..

Rajah 6 menunjukkan susunan radas untuk menyiasat tindak balas di antara larutan kalium

iodide dan air klorin melalui pemindahan elektron pada satu jarak.

DIAGRAM / RAJAH 6

(a) What is the function of dilute sulphuric acid?

Apakah fungsi asid sulfurik cair?

……………………………………………………………………………………………

[1 mark ]

(b) On the diagram 6, draw the direction of the flow of electrons.

Dilute sulphuric acid

G

Electrode Q

Chlorine water Potassium iodide

solution

Electrode P

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12

Pada rajah 6, lukiskan arah pengaliran elektron – elektron.

[1 mark ]

(c) (i) What is the colour change in the solution around electrode P?

Apakah perubahan warna dalam larutan di sekitar elektrod?

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

[1 mark ]

(ii) Describe a chemical test to determine the product formed in the solution at

electrode P.

Huraikan satu ujian kimia untuk menentukan hasil yang terbentuk dalam larutan

di elektrod P.

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

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

[2 marks ]

(d) What is the substance that is being oxidised in the experiment? Explain why.

Apakah bahan yang dioksidakan dalam eksperimen?Terangkan mengapa.

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

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

[2 marks ]

(e) Write a half equation for the reaction that occurs at electrode Q.

Tuliskan satu persamaan setengah bagi tindak balas yang berlaku di elektrod Q.

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

[1 mark ]

(f) Suggest another reagent that can replace chlorine water.

Cadangkan reagen lain yang boleh menggantikan air klorin.

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

[1 mark ]

(g) What is the change in oxidation number of chlorine in the reaction?

Apakah perubahan nombor pengoksidaan bagi klorin dalam tindak balas?

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

[1 mark ]

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13

Section B

[20 marks]

Answer any one question.

The time suggested to answer this section is 30 minutes.

7 (a) Table 7 shows the incomplete observation for two experiments to

construct balanced chemical equation.

Jadual 7 menunjukkan pemerhatian yang tidak lengkap bagi dua eksperimen

untuk membina persamaan kimia yang seimbang.

Experiment

Eksperimen

Procedure

Prosedur

Observation

Pemerhatian

A Copper(II)carbonate is heated

and the gas produced is passed

through lime water.

Kuprum(II)karbonat

dipanaskan dan gas yang

terhasil dialirkan melalui air

kapur.

Green solid turns black.

The lime water turns milky.

Pepejal hijau menjadi hitam.

Air kapur menjadi keruh.

B Potassium iodide solution is

added to lead(II) nitrate

solution.

Larutan kalium iodida

ditambah kepada larutan

plumbum(II)nitrat.

TABLE / JADUAL 7

(i) Based on the observation, name the products in experiment A and write

the chemical equation for the reaction.

Berdasarkan pemerhatian , namakan hasil tindak balas dalam

eksperimen A dan tuliskan persamaan kimia bagi tindak balas itu.

[ 3 marks ]

(ii) State one observation in experiment B and name the product.

Write the chemical equation for the reaction.

Nyatakan satu pemerhatian dalam eksperimen B dan namakan

hasil tindak balas itu. Tuliskan persamaan kimia bagi tindak balas

itu.

[ 4 marks ]

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14

(b) The reaction between acid , HX and ionic compound , QY2 can be represented

by chemical equation below.

Tindak balas antara asid , HX dan sebatian ion , QY2 boleh diwakili oleh

persamaan kimia di bawah.

2HX(aq) +QY2(aq)→ QX2(s) + 2HY(aq).

State three statement to describe the chemical equation above.

Suggest an acid of HX and an ionic compound of QY2.

Nyatakan tiga pernyataan untuk menghuraikan persamaan kimia di atas.

Cadangkan asid HX dan sebatian ion QY2.

[ 5 marks]

(c) The information below is regarding substance X

Maklumat di bawah berkaitan dengan bahan X

(i) Determine the empirical formula of substance X.

[Given that the relative atomic mass of C = 12 , H = 1]

Tentukan formula empirik bagi sebatian X

[Diberi jisim atom relatif C = 12 , H = 1]

(ii) Determine the molecular formula of substance X.

Tentukan formula molekul bagi bahan X.

(iii) Based on the answers in (a)(i) and (a)(ii) , compare and

contrast the empirical formula and the molecular formula.

Berdasarkan jawapan dalam (a)(i) dan (a)(ii), banding dan

bezakan formula empirik dan formula molekul.

[ 8 marks]

Carbon 85.70%

Karbon

Hydrogen 14.30%

Hidrogen

Relative molecular mass = 56

Jisim molekul relatif

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15

8 (a) State three factors affecting the rate of reaction.

Nyatakan tiga faktor yang mempengaruhi kadar suatu tindak balas.

[3 marks]

(b) An experiment is carried out to study the rate of reaction between magnesium

and hydrochloric acid. The time taken by magnesium to dissolve in acid in each

experiment is recorded in Table 8.

Satu eksperimen dijalankan untuk mengkaji kadar tindak balas antara

magnesium dan asid hidroklorik. Masa magnesium larut di dalam asid dalam

setiap eksperimen dicatat seperti dalam jadual 8

Experiment

Eksperimen

Reactant

Bahan tindak balas

Temperature

suhu

(0C)

Time

masa

(s)

I

20 cm3 of 0.5 mol dm

-3 hydrochloric acid +

2 g of magnesium strip

20 cm3 asid hidroklorik 0.5 mol dm

-3 +

2 g pita magnesium

30 120

II

20 cm3 of 1.0 mol dm

-3 hydrochloric acid +

2 g of magnesium strip

20 cm3 asid hidroklorik 1.0 mol dm

-3 +

2 g pita magnesium

30 60

III

20 cm3 of 1.0 mol dm

-3 hydrochloric acid +

2 g of magnesium powder

20 cm3asid hidroklorik 1.0 mol dm

-3 +

2 g serbuk magnesium

30 40

IV

20 cm3 of 1.0 mol dm

-3 hydrochloric acid +

2 g of magnesium strip +

5 drops of copper(II) sulphate solution

20 cm3 asid hidroklorik 1.0 mol dm

-3 +

2 g pita magnesium + 5 titik larutan kuprum(II)

sulfat

30 45

TABLE/JADUAL 8

(i) Write an ionic equation for the reaction between magnesium and acid.

Tuliskan persamaan ionik yang berlaku antara magnesium dan asid.

[1 mark]

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16

(ii) Compare the rate of reaction for

experiment I and experiment II,

experiment II and experiment III.

experiment II and experiment IV

Explain your answer based on the collision theory.

Bandingkan kadar tindak balas antara

eksperimen I dan eksperimen II

eksperimen II dan eksperimen III

eksperimen II dan eksperimen IV

Terangkan jawapan andaberdasarkan teori perlanggaran

[9 marks]

(iii) If experiment II is repeated at 40 0C, predict the time taken for the 2 g

magnesium to dissolve completely. Explain your answer.

Jika eksperimen II diulangi pada suhu 40 0C, cadangkan masa yang

diambil untuk 2 g magnesium larut sepenuhnya. Jelaskan jawapan anda.

[3 marks]

(c) Based on the collision theory, explain why we need to store fresh milk in a

refrigerator.

Berdasarkan Teori Perlanggaran, terangkan mengapa kita perlu menyimpan

susu segar dalam peti sejuk.

[4 marks]

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Page 40: 2010 Chemistry Perak(Gerak Gempur)

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17

Section C

[20 marks]

Answer any one question.

The time suggested to answer this section is 30 minutes

9 (a) Diagram 9 shows the reactions involved in the preparation of soluble salts.

DIAGRAM/ RAJAH 9

(i) Sodium, potassium and ammonium salts can be prepared using reaction

between acid and alkali. State the reaction X, Y and Z.

Garam natrium, kalium dan ammonium dapat disediakan melalui tindak

balas antara asid dan alkali. Nyatakan tindak balas X, Y dan Z.

[3 marks]

(ii) By choosing one of the reactions in (a) (i), suggest example of reactants

used and products formed.

Write the chemical equation for the reaction based on your suggestion.

Dengan memilih satu daripada tindak balas dalam (a) (i), cadangkan

contoh bahan- bahan tindak balas yang digunakan dan hasil-hasil

tindak balas yang terbentuk.

Tuliskan persamaan kimia bagi tindak balas berdasarkan cadangan

anda itu.

[3 marks]

Soluble salts /

Garam larut

Sodium salts /

Garam natrium

Potassium salts /

Garam kalium

Ammonium salt /

Garam ammonium

Other salts /

Garam lain

Asid + alkali salt + water

Asid + alkali garam + air

Reaction / Tindak balas X

Reaction / Tindak balas Y

Reaction / Tindak balas Z

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18

(b)

Answer the following questions based on the above statement.

Jawab soalan- soalan berikut berdasarkan pernyataan di atas.

(i) Describe a laboratory experiment to prepare a dry magnesium sulphate.

In your description, include the chemical equation involved.

Huraikan satu eksperimen makmal untuk menyediakan garam

magnesium sulfat yang kering. Dalam huraian anda sertakan persamaan

kimia bagi tindak balas yang terlibat.

[10 marks]

(ii) Describe a simple chemical test of how you could differentiate between

magnesium sulphate and magnesium nitrate.

Huraikan satu ujian kimia ringkas bagaimana anda membezakan antara

larutan magnesium sulfat dan magnesium nitrat.

[4 marks]

10 Table 10 shows the molecular formula and heat of combustion of three types of alcohol.

Jadual 10 menunjukkan formula molekul dan haba pembakaran bagi tiga jenis alkohol.

Alcohol/

Alkohol

Molecular formula /

Formula molekul

Haba pembakaran /

Heat of combustion

(kJ mol -1

)

Methanol CH3OH 725

Ethanol C2H5OH 1 376

Propan-1-ol C3H7OH 2 015

TABLE / JADUAL 10

(a) (i) What is the meaning of the ‘heat of combustion of an alcohol’?

Apakah yang dimaksudkan dengan ‘haba pembakaran alkohol’?

[ 1 mark]

(ii) Explain why there are differences in the value of heat of combustion of

the alcohols in Table 10.

Terangkan mengapa terdapat perbezaan nilai haba pembakaran bagi

alkohol-alkohol dalam Jadual 10.

[ 3 marks]

Magnesium sulphate is a soluble salt.

Magnesium sulfat adalah garam terlarutkan.

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19

(b) Describe an experiment that you can carry out in your school laboratory to

determine the heat of combustion of one of the alcohol in Table 10. Your

description should include precautionary steps and the steps involved in the

calculation.

Huraikan satu eksperimen yang anda boleh jalankan di makmal sekolah anda

bagi menentukan haba pembakaran salah satu alkohol dalam Jadual 10.

Huraian anda perlu mengandungi langkah berjaga-jaga dan langkah-langkah

perhitungan yang terlibat.

[12 marks]

(c) In another experiment to determine the heat of precipitation of lead (II) sulphate,

50.0 cm3 of 2.0 mol dm

-3 lead(II) nitrate solution is reacted with 50.0 cm

3 of 2.0

mol dm-3

sodium sulphate solution. Increment of the temperature in the mixture

is 10 oC.

Dalam satu eksperimen lain bagi menentukan haba pemendakan plumbum(II)

sulfat, sejumlah 50 cm3 larutan plumbum(II) nitrat 2.0 mol dm

-3 dicampur

dengan 50 cm3 larutan natrium sulfat 2.0 mol dm

-3. Kenaikan suhu campuran

ialah 10 oC.

The equation for the reaction is :

Persamaan bagi tindak balas tersebut adalah :

Pb(NO3)2 + Na2SO4 PbSO4 + 2NaNO3

Calculate the value of the heat of precipitation of lead(II) sulphate in this

reaction.

Hitungkan haba pemendakan plumbum(II) sulfat dalam eksperimen ini.

[Use the information that the specific heat capacity of water is 4.2 J g -1 o

C-1

]

[Gunakan maklumat muatan haba tentu larutan adalah 4.2 J g -1 o

C-1

]

[4 marks]

END OF QUESTION PAPER

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Answer all questions

The time suggested to complete Question 1 and Question 2 is 45 minutes

1 A student carried out two experiments to determine the concentration of HX acid solution.

Seorang pelajar menjalankan dua eksperimen untuk menentukan kepekatan larutan asid HX.

Experiment I

Eksperimen I

Titration of HX acid solution of unknown concentration with 20cm3 of sodium hydroxide

solution 1.0 mol dm-3

using phenolftalein as indicator.

Pentitratan larutan asid HX yang tidak diketahui kepekatannya dengan 20cm3 larutan

natrium hidroksida 1.0 mol dm-3

menggunakan penunjuk fenolftalein.

Experiment II

Eksperimen II

Titration of similar HX acid solution of difference concentration with 20cm3 of sodium

hydroxide solution 1.0 mol dm-3

using phenolftalein as indicator.

Pentitratan larutan asid HX lain yang tidak diketahui kepekatannya dengan 20cm3 larutan

Natrium Hidroksida 1.0 mol dm-3

menggunakan penunjuk fenolftalein.

Diagram 1 shows the initial and final burette readings for both experiments.

Rajah 1 menunjukkan bacaan awal dan bacaan akhir buret bagi kedua-dua eksperimen.

Experiment 1

Eksperimen 1

Initial burette reading Final burette reading

Bacaan awal buret Bacaan akhir buret

20

1

0

21

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Experiment II

Eksperimen II

Initial burette reading Final burette reading

Bacaan awal buret Bacaan akhir buret

Diagram 1

Rajah 1

(a) Construct a table to record the initial and final burette readings and the volumes of the acid

used for both experiments.

Bina jadual dan catat bacaan awal dan bacaan akhir buret serta isipadu asid yang digunakan

bagi kedua-dua eksperimen di atas.

[ 3 marks]

(b) State the colour change of phenolftalein in the titration.

Nyatakan perubahan warna fenolftalein dalam titratan tersebut.

…………………………………………………………………………………..

[ 3 marks]

1(a)

1(b)

25

16

15

26

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(c) The chemical equation for the reaction in the experiment is :

Persamaan kimia bagi tindak balas dalam eksperimen ini ialah :

Calculate the concentration of HX acid solutions used in both experiments.

Hitung kepekatan larutan asid HX yang digunakan dalam kedua-dua eksperimen.

Experiment I

Eksperimen I

Experiment II

Eksperimen II

[ 3 marks]

(d) State the hypothesis in this experiment.

Nyatakan hipotesis bagi eksperimen ini.

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

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

[ 3 marks]

HX + NaOH NaX + H2O

1(c)

1(d)

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(e) If HX acid is replaced with sulphuric acid of the same concentration, it is found that the volume

of the sulphuric acid used in the titration is half of the volume of HX acid. Explain why.

Jika asid HX digantikan dengan asid sulfurik yang mempunyai kepekatan yang sama, didapati

isipadu asid sulfurik yang digunakan dalam titratan ialah separuh daripada isipadu asid HX.

Terangkan mengapa.

…………………………………………………………………………………………

…………………………………………………………………………………………

…………………………………………………………………………………………

[ 3 marks]

2 Diagram 2 shows the apparatus set-up for an experiment to compare the heat of combustion of

methanol and ethanol. 200 cm3 of water is used in this experiment.

Rajah di bawah menunjukkan susunan radas bagi eksperiment untuk membandingkan

Haba pembakaran antara metano dengan etanol. 200 cm3 air digunakan dalam ekperimen ini.

Diagram 2

Rajah 2

Thermometer

Thermometer

Tripod stand

Tungku kaki tiga

Copper container

Bekas kuprum

Spirit lamp

Pelita

Wooden block

Blok kayu

Alcohol

Alkohol

Water

Air

Wind shield

Penghadang

1(e)

Total

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7

The table below shows the results obtained from the experiment I the heat of combustion of

methanol and experiment II the heat of combustion of ethanol.

Jadual di bawah menunjukkan keputusan eksperimen I haba pembakaran methanol

dan eksperimen II haba pembakaran etanol.

Experiment I

Eksperimen I

Experiment II

Eksperimen II

Initial temperature of water: ……..................

Suhu awal air

Initial temperature of water: .........................

Suhu awal air

Highest temperature of water: ...........................

Suhu tertinggi air

Highest temperature of water: ..........................

Suhu tertinggi air

Initial mass of spirit lamp and methanol: .............g

Jisim awal pelita dan metanol

Initial mass of spirit lamp and ethanol: …....... g

Jisim awal pelita dan metanol

Final mass of spirit lamp and methanol: ……......g

Jisim akhir pelita dan metanol

Final mass of spirit lamp and ethanol: ............. g

Jisim akhir pelita dan etanol

20

25

15

20

25

15

60

65

55

60

65

55

150.50

245

150.50

149.37

151.35

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8

(a) Write the readings of the temperature and the mass of spirit lamp and alcohol in the spaces above.

Tuliskan bacaan suhu dan jisim pelita dan alkohol dalam ruangan di atas.

[3 marks]

(b) Based on the information above, complete the table below.

Berdasarkan kepada maklumat di atas lengkapkan jadual di bawah.

Name of variables

Nama pemboleh ubah

Action to be taken

Tindakan yang dibuat

(i) Manipulated variable:

Pemboleh ubah dimanipulaskan:

………………..........……………………..

………………….........…………………..

(i) The way to manipulate variable:

Cara mengubah pemboleh ubah

dimanipulasi:

……………..................…………………………..

………….................……………………………...

(ii) Responding variable:

Pemboleh ubah bergerak balas:

……………………………………………

……………………………………………

(ii) What to observe in the responding variable:

Apa yang diperhatikan bagi menentukan

pemboleh ubah gerak balas:

…………………..................……………………..

…………………..................……………………..

(iii) Fixed variable:

Pemboleh ubah yang dimalarkan:

……………………………….…………..

……………………………………….…..

(iii) The way to maintain the controlled variable:

Cara menetapkan pemboleh ubah dimalarkan :

……………………………………………………

……………………………………………………

[3 marks]

(c) (i) Calculate the energy change in the experiment I and II.

Hitungkan perubahan tenaga dalam eksperimen I dan II

[Given: Energy change = mc, specific heat capacity of water, c = 4.2 Jg-1o

C]

[Diberi: perubahan tenaga = mc, muatan haba tentu air, c = 4.2 Jg-1o

C]

[3 marks]

2(a)

2(b)

2(c)(ii)

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(ii) Calculate the number of moles of methanol and ethanol burnt in this experiment.

Hitungkan bilangan mol methanol dan etanol yang terbakar dalam eksperimen ini.

[Molar mass of methanol = 32 g mol-1

] [Molar mass of ethanol = 46 g mol-1

]

[Jisim molar metanol = 32 g mol-1] [Jisim molar etanol = 46 g mol

-1]

[3 marks]

(iii) Calculate the heat of combustion of methanol in this experiment.

Hitungkan haba pembakaran metanol dalam eksperimen ini.

[3 marks]

(d) Predict the heat of combustion of ethanol compare to the heat combustion of methanol.

Ramalkan haba pembakaran etanol berbanding dengan haba pembakaran methanol.

………………………………………………………………………………………………………

………………………………………………………………………………………………………

[3 marks]

2(c)(ii)

2(c)(iii)

2(d)

Total

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10

You are given the copper strip, lead strip, iron strip, zinc strip, aluminium strip, magnesium strip

and copper(II) sulphate solution.Referring to the statement above, plan a laboratory experiment to

construct the electrochemical series of the potential differences using different pair of metals.

Your explanation should include all the followings:

Anda dibekalkan dengan kepingan kuprum, kepingan plumbum, kepingan ferum, kepingan zink,

kepingan aluminium, kepingan magnesium dan larutan kuprum(II) sulfat. Merujuk kepada situasi

di atas, rancangkan satu eksperimen dalam makmal untuk membina siri elektrokimia .

Penerangan anda hendaklah mengandungi perkara-perkara berikut:

(a) Aim of the experment

Tujuan eksperimen

(b) All the variables

Semua pemboleh ubah yang terlibat

(c ) Statement of the hypothesis

Pernyataan hipotesis

(d) List of materials and apparatus

Senarai bahan dan alat radas

(e) Procedure of the experiment

Prosedur eksperimen

(f) Tabulation of data

Penjadualan data

[ 17 marks ]

END OF QUESTION PAPER

The further the distance between two metals in the electrochemical series,

the bigger the potential difference.

Semakin jauh kedudukan pasangan logam dalam siri elektrokimia,

semakin besar nilai voltan.

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Page 51: 2010 Chemistry Perak(Gerak Gempur)

SPM Chemistry skema gerak gempur paper 1

1 A 21 A 41 A

2 C 22 A 42 A

3 A 23 C 43 C

4 C 24 C 44 A

5 D 25 C 45 A

6 D 26 C 46 B

7 C 27 D 47 B

8 C 28 D 48 C

9 D 29 C 49 D

10 A 30 B 50 B

11 C 31 D

12 D 32 D

13 D 33 C

14 D 34 B

15 C 35 C

16 C 36 D

17 C 37 A

18 B 38 C

19 C 39 D

20 C 40 C

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Page 52: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 2 4541/2

1

Section A

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

(ii) 12 1

(b) X and Y 1

Because same proton number/the number of proton but difference

number of neutron/nucleon number

1

(c) 2.8.7 1

(d) (i)

Electron arrangement

Label 17p & 18n

1

1

(ii) 7 1

(iii) Y -

1

(e) X35

17 1

10

2 (a) 2.7 1

(b) (i) Period 2 1

(ii) Atomic size of X is smaller than V // Atomic size of V bigger than

X.

1

(iii) The number of proton in atom X is more than V.

The attraction by the nucleus on electron in atom X is stronger than

V.

or

The number of proton in atom V is less than X.

The attraction by the nucleus on electron in atom V is weaker than

X.

1

1

1

1…...……2

(c) (i) VW4 1

(ii) has low melting / boiling point // cannot conduct electricity

in any state // soluble in organic solvent

1

(d) (i) Ionic compound 1

(ii)

U W

17p

18n

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2

[Number of electron each shells are correct]

[Number of charge symbol are correct]

1

1

10

3 (a) Chemical to electrical 1

(b) Cu2+

, H+, OH

- and SO4

2- 1

(c) (i) Zinc 1

(ii) Zinc atom releases electrons//Zinc more electropositive // Zn above

in electrochemical series

1

(d) (i) Brown solid deposited 1

(ii) Cu2+

+ 2e Cu 1

(e) Blue to colourless// Blue become fade/ paler // The intensity of

blue colour decreases.

The number of copper(II) ions decreases //The concentration of

copper(II) ions decr

1

1

(f) (i) Cu, R, Q, P 1

(ii) 1.5 V 1

10

4 (a) (i) Saponification 1

(ii) Concentrated sodium hydroxide solution 1

(iii) to lower the solubility of soap 1

(iv) Water: x Grease: y 1

(b) (i) silicon dioxide 1

(ii) inert towards chemicals 1

(iii) Borosilicate glass 1

(c) (i) Structural material that is formed by combining two or more

different subtances.

1

(ii) silver bromide / Copper(I) chloride 1

(iii) darken when exposed to sunlight

10

5 (a) (i) alcohol 1

(b) (i) H H H H

H C C C C-O-H

1

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3

H H H H

(ii) 2-methylpropan-2-ol 1

(c) (i) Esterification 1

(ii) C4H9OH + C3H7COOH→ C3H7COOC4H9 + H2O 1

(iii) Insoluble in water // sweet smell // volatile 1

(d) [Functional diagram]

[Label]

1

1

(e) (i) Addition reaction 1

(ii) The colour of bromine water change from brown to colourless 1

10

6 (a) To allow the movement of ions. 1

(b)

1

(c) (i) Colourless change to brown 1

(ii) Place a few drops of starch solution.

A blue precipitate is formed.

1

1

(d) Iodide ion // potassium iodide

Loss electron//increase in oxidation number

1

1

(e) Cl2 + 2e 2Cl- 1

(f) Bromine water // acidified KMnO4 solution // acidified K2Cr2O7

solution

1

(g) 0 to -1 1

10

Section B

7 (a) (i) Copper(II)oxide

Carbon dioxide

CuCO3→ CuO + CO2

1

1

1………...3

Dilute sulphuric acid

G

Electrode Q

Chlorine water Potassium iodide

solution

Electrode P

e

e e

e

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4

(ii) Yellow precipitate

Lead(II) iodide

2KI + Pb(NO3)2 → PbI2 + 2KNO3

Formula of reactants and products are correct

Balance

1

1

1

1………...4

(b) XH react with QY2 to produce QX2 and HY //

Reactants : XH and QY2 Products : QX2 and HY

HX aqueous solution react with QY2 aqueous solution to

produce QX2 solid and HY aqueous solution

2 mole of HX react with 1 mole of QY2 to produce

1 mole of QX2 and 2 mole of HY.

HX : Hydrochloric acid / HCl

QY2 : Lead (II)nitrate / Pb(NO3)2

1

1

1

1

1………...5

(c) (i) C H

85.70 14.30

12 1

7.14 14.30

7.14 7.14

1 2

The empirical formula CH2

1

1

1………..3

(ii) ( CH2 )n = 56

[ 12 + 2(1) ]n = 56

56 // 4

14

The molecular formula C4H8

1

1

1………..3

(iii) Empirical formula Molecular formula

The formula shows that carbon

and hydrogen are present

The formula shows that carbon

and hydrogen are present

The formula shows that the

ratio of carbon to hydrogen is

1:2

The formula shows that one

molecule of X consists of 4

carbon atoms and 8 hydrogen

atoms

1 + 1……2

20

8 (a) Size of solid particles

Concentration of solution 1

Temperature 1

Catalyst 1……3

[any three]

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5

(b) (i) Mg + 2H+ Mg

2+ + H2 1

(ii) Comparing experiment II and experiment I

The concentration of hydrochloric acid in experiment II

is higher than experiment I . 1

The frequency of collision between H+ ions and

magnesium atom increases. 1

The frequency of effective collision increases. 1

Comparing experiment II and experiment III

The total surface area of magnesium in experiment III

is larger than experiment II. 1

The frequency of collision between H+ ions

and magnesium atom increases. 1

The frequency of effective collision increases. 1

Comparing experiment II and experiment IV

Copper(II) sulphate solution is a catalyst 1

It lower the activation energy 1

The number of effective collision increases. 1….. 9

(iii) The time taken becomes shorter / less than 60s 1

When the temperature increases, the kinetic energy of H+

ions increases / H+ ions move faster. 1

The frequency of effective collision between H+ ions and magnesium

atom increases // The number of effective collision increases. 1........3

(c) The temperature inside the refrigerator is lower 1

Bacteria are not active at low temperature 1

Decomposition of milk caused by bacteria will slow down 1

This will keep the milk fresh for a longer period 1…...4

20 Section C

9.

(a) (i) 1. acid and metal oxide 1

2. acid and reactive metal 1

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Page 57: 2010 Chemistry Perak(Gerak Gempur)

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6

3. acid and metal carbonate 1 …3

(ii) Sample answer

[ Name any acid ] and [ Name any metal / metal oxide / metal carbonate ] 1

[ Name equivalent salt and water// water + CO2 // water + H2] 1

[ Balanced equation ] 1… 3

(b) (i) [chemical substances - 1 mark]

[ apparatus - 1 mark]

[procedure - 7 marks]

[chemical equation - 1 mark]

Sample answer :

1. [chemical substances]

magnesium powder /magnesium oxide(Hydroxide, carbonate)

and sulphuric acid 1

2. [ apparatus]

Beaker, filter funnel, filter paper, glass rod 1

3. [procedure]

[20 – 100] cm3 sulphuric acid [0.5 – 2.0 ] mol dm

-3 is poured into a beaker 1

4. magnesium powder is added to sulphuric acid until undissolved /excess /

no more effervescence 1

5. Stir

6. the mixture is filtered 1

7. the filtrate is evaporated until saturate (one-third of it original volume) 1

8. the saturated solution is then allowed to cool to room temperature. 1

9. crystals is dried between filter paper 1

10. [chemical equation]

Mg + H2SO4 → MgSO4 + H2 // MgO + H2SO4 → MgSO4 + H2O//

MgCO3 + H2SO4 → MgSO4 + CO2 + H2O 1.... 10

(ii) [ test for sulphate ]

1. Each of solution is filled into a two test tube 1

2. Lead (II) nitrate/ Silver nitrate is added to both of test tube 1

3. If no change occur magnesium nitrate solution 1

4. If white precipitate is formed magnesium sulfat solution 1.... 4

OR [test for nitrate]

1. Each of solution is filled into a two test tube 1

2. [Add] dilute sulphuric acid, Iron (II) sulphate solution, concentrated

sulphuric acid to both of test tube 1

3. if brown ring is formed magnesium nitrate solution 1

4. If no changes occur magnesium nitrate solution 1... 4

20

10 (a) (i) The heat given off when one mole of an alcohol is burnt completely in an

excess of oxygen.

1

(ii) As the number of carbon atom increase, the value of heat combustion

increase.

1

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Page 58: 2010 Chemistry Perak(Gerak Gempur)

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7

The greater the number of carbon atoms, the more products will be

obtained.

More heat is released for the formation of bonds

1

1

(b) Procedure :

1. Measure [100 -250] cm3 of water and pour it into the copper

container /aluminium can

2. Measure and record the initial temperature of the water.

3. Fill the small lamp with alcohol* then weigh it and record the

initial mass.

4. Light the wick of the lamp.

5. Place the lamp as near as possible to the copper container.//

[ Diagram : Using wooden block ]

6. [The apparatus is protected by a wind shield] // [Diagram]

7. Stir the water continuously.

8. Put out / blown out the flame when the temperature rises [ 10 –

30 ] oC and record the highest temperature of the water.

9. Weigh the lamp as quickly as possible and record the final mass.

1

1

1

1

1

1

1

1

1

Result :

Initial temperature of the water/ oC = T1

Highest temperature of the water/ oC = T2

Temperature rise of the water/ oC = T2 – T1

Initial mass of lamp + alcohol* / g = m1

Final mass of lamp + alcohol* / g = m2

Mass of alcohol that was burnt / g = m1 – m2

1

Calculation :

Energy chage/heat given off = 200 × 4.2 × (T2 – T1)

Number of mole of alcohol =

Heat of combustion of alcohol*, ΔH =

=

1

1

1

13

Max

12

(c)

Number of mole of lead(II) nitrate = 50 x 2

1000 = 0.1 mol

or

m1 – m2

Mr of alcohol*

Energy change

Number of mole of alcohol

200 × 4.2 × (T2 – T1)

m1 – m2

Mr of alcohol*

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8

Number of mole of sodium sulphate = 50 x 2

1000 = 0.1 mol

1

Ratio of mole :

1 mol Pb(NO3)2 / Na2SO4 → 1 mol PbSO4

0.1 mol Pb(NO3)2 / Na2SO4 → 0.1 mol PbSO4

1

Energy chage/heat given off = 200 × 4.2 × 10

= 4200 J

1

Heat of precipitation of PbSO4 =

1.0

4200

= 42000 J mol-1

/ 4.2 kJ mol-1

1…4

20

END OF MARKING SCHEME

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Page 60: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

1

Question

Number

Rubric Score

1(a)

[Able to exhibit the tabulation of data correctly]

Tabulation of data has the following element :

3 columns and 4 rows

Table contains topics, labeled with two decimal place and unit

Example :

Experiment I II

Initial reading/ cm3 0.45 15.45

Final reading / cm3 20.45 25.45

Volume of HX /cm3 20.00 10.00

3

[Able to exhibit the tabulation of data less accurately, without unit/ one

decimal place] 2

[Able to state an idea about tabulation of data]

Table contains at least two columns and two rows

1

[ No response or wrong response] 0

Question

Number

Rubric Score

1(b)

[Able to state one observation accurately]

Example : Red/Pink to colourless

3

[Able to state one observation less accurately]

Example : colourless

2

[Able to state an idea about the observation]

The colour changes // pink 1

[ No response or wrong response] 0

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Page 61: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

2

Question

Number

Rubric Score

1(c)

[Able to show the calculation of HX acid concentration with the unit for both

experiment correctly]

Example :

Experiment I The concentration of HX acid = (1)(20) / 20

= 1.0 moldm-3

or

(i) Number of mole for NaOH = (1)(20)/1000)

= 0.02 mol

(ii) Based on the equation,

1 mol of NaOH reacts with 1 mol of HX acid,

0.02 mol of NaOH reacts with 0.02 mol of

HX acid.

(iii) Concentration of HX acid = ( 0.02 x 1000 ) / 20

= 1.0 moldm-3

Experiment II

The concentration of HX acid = (1)(20) / 10

= 2.0 moldm-3

or

(i) Number of mole for NaOH = (1)(20)/1000)

= 0.02 mol

(ii) Based on the equation,

1 mol of NaOH reacts with 1 mol of HX acid,

0.02 mol of NaOH reacts with 0.02 mol of HX acid.

(iii) Concentration of HX acid = ( 0.02 x 1000 ) / 10

= 2.0 moldm-3

3

[Able to show the calculation of HX acid concentration without unit for both

experiment less correctly]

2

[Able to show an idea to calculate the concentration] 1

[ No response or wrong response] 0

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Page 62: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

3

Question

Number

Rubric score

1(e)

[Able to compare HX acid with sulphuric acid correctly]

Example :

HX acid is a monoprotic/monobasic acid

Sulphuric acid is a diprotic/dibasic acid

Number of hydrogen ion in 1 mol of sulphuric acid is double of HX acid//

total number of hydrogen ions in both solution are the same

3

[Able to state any two of the above mentioned answers less correctly]

2

[Able to state any one of the above mentioned answers ]

1

[ No response or wrong response] 0

Question

Number Rubric Score

2(a)

[Able to write initial and final temperature with one decimal, initial and final

mass of spirit lamp and methanol and ethanol with two decimal in

experiment I and II with unit accurately]

Answer :

Experiment I : Initial temperature of water : 25.0 oC

Highest temperature of water : 65.0 oC

Initial mass of spirit lamp and methanol: 150.50 g

Final mass of spirit lamp and methanol : 149.37 g

Experiment II : Initial temperature of water : 25.0 oC

Highest temperature of water : 65.0 oC

Initial mass of spirit lamp and ethanol: 151.35 g

Final mass of spirit lamp and ethanol : 150.50 g

3

Question

Number

Rubric

Score

1(d)

[Able to state hypothesis correctly ]

Example : The higher/lower the concentration of HX acid, the lower/higher the volume of the

acid to neutralize the sodium hydroxide solution / alkali.

3

[Able to state hypothesis almost correct ]

Example : The lower/higher the volume of the acid to neutralize the alkali, the higher/lower the

concentration of HX acid.

2

[Able to state an idea about the hypothesis]

Example:

Concentration of the acid affects the volume of acid

1

[ No response or wrong response] 0

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Page 63: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

4

[Able to write initial and final temperature of water with one decimal without

unit, initial and final mass of spirit lamp and methanol and ethanol with two

decimal in experiment I and II accurately]

2

[Able to write at least one initial or final temperature of water without unit,

initial or final mass of spirit lamp and methanol and ethanol in experiment I

and II ]

1

[ No response / wrong response ] 0

Question

Number Rubric Score

2 (b)

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

Example :

Manipulated variable :

Types of alcohol//ethanol and

methanol

Using difference alcohol

Responding variable :

Heat of combustion

The different of mass of difference

alcohol

Fixed variable :

Volume of water// same increment

of temperature

Using the same volume of water //

same increment of temperature

3

[ Able to state any pair of variable and action correctly ] ] 2

[ Able to state any variable and any action correctly // any two variables

correctly // any two action correctly] 1

[ No response or wrong response] 0

Question

Number Rubric Score

2(c)(i)

[ Able to show the calculation correctly with unit ]

Example :

Experiment I

Energy change = 200 x 4.2 x 40 = 33 600 J

Experiment II

Energy change = 200 x 4.2 x 40 = 33 600 J

3

[ Able to show the calculation correctly without unit ]

2

[ Able to state an idea the calculation the energy change]

1

[ No response or wrong response] 0

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Page 64: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

5

Question

Number Rubric Score

2(c)(ii)

[ Able to show the calculation correctly with unit]

Example :

The number of moles methanol = 1.13 = 0.035 mol

32

The number of moles ethanol = 0.85 = 0.018 mol

46

3

[ Able to show the calculation correctly without unit]

2

[ Able to state an idea the calculation the number of mole]

1

[ No response or wrong response] 0

Question

Number Rubric Score

2(c)(iii)

[ Able to show the calculation correctly with unit ]

Example :

The heat combustion of methanol = 33 600 J

0.035

= 960 000 J mol-1

= 960 kJ mol-1

3

[ Able to show the calculation correctly without unit]

2

[ Able to state an idea the calculation the heat of combustion of methanol]

1

[ No response or wrong response] 0

Question

Number Rubric

Maxi

mum

Score

2(d)

[Able to predict the heat combustion of ethanol correctly]

Example:

Higher than heat combustion of methanol

3

[Able to state the heat combustion of ethanol]

Example:

1818 kJ mol-1

[The heat combustion of ethanol from calculation ]

2

[Able to state an idea the heat combustion of ethanol]

Example:

same

1

[ No response or wrong response] 0

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Page 65: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

6

Question

Number Rubric Score

3(a)

[ Able to give the aim of the experiment correctly ]

Example :

To construct the electrochemical series based on the potential differences

between metals

3

[ Able to give the aim of the experiment incorrectly ]

Example :

To construct the electrochemical series //How to construct an electrochemical

series based on the potential difference between metals?

2

[ Able to state an idea the aim of the experiment]

Example :

To study the potential difference between the metals

1

[ No response or wrong response] 0

Question

Number Rubric Score

3(b)

[ Able to state All variables correctly ]

Example :

Manipulated variable : Pairs of different metals//Different types of metals

Responding variable : Potential differences

Constant variable : Concentration of Copper(II) sulphate

// positive terminal

3

[ Able to state any two variables correctly ] 2

[ Able to state any one variables correctly ] 1

[ No response or wrong response] 0

Question

Number Rubric Score

3(c)

[ Able to give the hypothesis correctly]

Example :

The distance between two metals increase/decrease, the potential difference

will increase/ decrease

3

[ Able to give the hypothesis almost correct]

Example :

The potential difference will increase if the distance between two metals

increase

2

[ Able to state an idea of the hypothesis ]

Example :

The potential difference affects the position of the metals

1

[No response or wrong response] 0

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Page 66: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

7

Question

Number Rubric Score

3(d)

[ Able to give the list of the apparatus and materials correctly and

completely]

Example :

List of apparatus and materials

Copper strip, lead strip, iron strip, zinc strip, aluminium strip, magnesium

strip, copper (II) sulphate solution, sand paper, voltmeter, beaker, connecting

wires with crocodile clip

3

[ Able to give the list of the apparatus and materials correctly and but not

completely]

Example :

List of apparatus and materials

Copper strip, lead strip, zinc strip, magnesium strip[at least 4 metal strips],

copper (II) sulphate solution, voltmeter, connecting wires

2

[ Able to give an idea about the list of the apparatus and materials correctly]

Example :

Any one apparatus and one material

1

[No response or wrong response] 0

Question

Number Rubric Score

3(e)

[ Able to state all procedures correctly ]

Example :

1. Clean the metals with sand paper

2. Fill a beaker with copper(II)sulphate solution

3. Dip the magnesium strip and copper strip into the copper(II)sulphate

solution

4. Complete the circuit//switch-on the circuit

5. Record the potential difference between the metals

6. Determine and record which metal strip is the negative terminal

7. Repeat steps 1 to 6 using other metals to replace magnesium strip

3

[ Able to state 4 steps of procedures correctly ]

Steps 2,3,5,7 2

[ Able to state 2 steps of procedures correctly ]

Steps 3,5 1

[No response or wrong response] 0

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Page 67: 2010 Chemistry Perak(Gerak Gempur)

Gerak Gempur SPM Chemistry skema paper 3

8

Question

Number Rubric Score

3(f)

[ Able to exhibit the tabulation of data correctly ]

Tabulation of data has the following element :

1. 3 columns and 6 rows

Example :

Pair of metals Potential difference (V) Negative terminal

Mg and Cu

Al and Cu

Zn and Cu

Pb and Cu

Fe and Cu

3

[ Able to exhibit the tabulation of data almost correctly ]

Example :

Pair of metals Potential difference

2

[ Able to state an idea about the tabulation of data ]

1

[No response or wrong response] 0

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