P1 Soalan Percubaan Spm 2017.docx

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SULIT 1

1

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An electrolyte is Elektrolit adalah

A

a substance that does not conduct electricity. bahan yang tidak boleh mengkonduksi elektrik.

B

a substance that conducts electricity in solid and liquid state. bahan yang boleh mengkonduksi elektrik dalam keadaan pepejal dan cecair.

C

a substance that conducts electricity only in molten or aqueous state. bahan yang boleh mengkonduksi elektrik dalam keadaan leburan atau akueus.

D

a substance that conducts electricity in solid state but not in liquid state. bahan yang boleh mengkonduksi elektrik dalam keadaan pepejal tetapi tidak dalam keadaan cecair.

2

Diagram 1 shows a balloon which contains 6.02 X 1023 of gas particles. What is the number of mole of the gas in the balloon? Rajah 1 di bawah menunjukkan sebiji belon mengandungi 6.02 X 1023 zarah gas. Berapakah bilangan mol gas itu di dalam belon tersebut?

6.02 X 1023 of gas particles 6.02 X 1023 zarah gas

Diagram 1 Rajah 1

A

0.5 mole 0.5 mol

B

1.0 mole 1.0 mol

C

2.0 mole 2.0 mol

D

3.0 mole 3.0 mol

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SULIT 3

2

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The ions that present in an aqueous copper(II) chloride solution are Ion –ion yang hadir dalam larutan kuprum (II) klorida aqueus ialah

A

Cu2+ and ClCu2+ dan Cl-

B

Cu2+, Cl-, H+ and O2Cu2+, Cl-, H+ dan O2-

C

Cu2+, Cl-, H+ and OHCu2+, Cl-, H+ dan OH-

D

Cu2+, Cl-, H3O+ and O2Cu2+, Cl-, H3O+ dan O2-

4

Which substance is used as a food colouring? Bahan yang manakah digunakan sebagai pewarna makanan?

A

Sodium nitrite Natrium nitrit

B

Azo compound Sebatian azo

C

Ascorbic acid Asid askorbik

D

Monosodium glutamate Mononatrium glutamat

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SULIT 5

3

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Which substance is acidic? Bahan yang manakah bersifat asid?

A

Lithium oxide Litium oksida

B

Sulphur dioxide Sulfur dioksida

C

Sodium hydroxide Natrium hidroksida

D

Magnesium oxide Magnesium oksida

6

Which of the following is a natural polymer? Antara berikut yang manakah suatu polimer semulajadi?

A

Polythene Politena

B

Polystyrene Polistirena

C

Poly isoprene Poli isoprene

D

Polymethyl metacrilate Polimetil metakrilat

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SULIT 7

4

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A container contains 1.2 moles of hydrogen gas. What is the mass of hydrogen gas in the container? Suatu bekas mengandungi 1.2 mol gas hidrogen. Berapakah bilangan jisim gas hidrogen dalam bekas tersebut? ( RAM : H, 1 / JAR : H, 1)

A

2.4 g 2.4 g

B

3.6 g 3.6 g

C

16.8 g 16.8 g

D

22.4 g 22.4 g

8

Who arranged the elements in the Periodic Table in order of increasing proton number? Siapakah yang menyusun unsur-unsur dalam Jadual Berkala Unsur menurut pertambahan nombor proton? A

Dmitri Mendeleev Dmitri Mendeleev

B

Johann Dobereiner Johann Dobereiner

C

Henry Moseley Henry Moseley

D

Lothar Meyer Lothar Meyer

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SULIT 9

5

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Which of the following is true about covalent compound? Antara berikut yang manakah benar tentang sebatian kovalen?

A

Conduct electricity in molten or aqueous state Mengkonduksi elektrik dalam keadaan lebur dan larutan akueus

B

Low melting point Takat lebur yang rendah

C

Soluble in water Larut di dalam air

D

Not volatile Tidak meruap

10

Which acid ionize partially in water? Asid yang manakah mengion separa di dalam air?

A

HCl HCl

B

HNO3 HNO3

C

H2SO4 H2SO4

D

CH3COOH CH3COOH

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SULIT 11

6

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The electrochemical series is Siri elektrokimia ialah

A

metals that are arranged according to the tendency of their atoms to gain electrons logam yang disusun mengikut kecenderungan atom untuk menerima elektron

B

metals that are arranged according to the tendency of their atoms to donate electrons logam yang disusun mengikut kecenderungan atom melepaskan elektron

C

metals that are arranged according to the tendency of their ions to gain electrons logam yang disusun mengikut kecenderungan ion untuk menerima elektron

D

metals that are arranged according to the tendency of their ions to donate electrons logam yang disusun mengikut kecenderungan ion untuk melepaskan elektron

12

Neon does not react with other elements. Which of the following statements is true about neon? Neon tidak bertindak balas dengan unsur lain. Antara pernyataan berikut, yang manakah benar mengenai neon?

A

Neon always combines with itself Neon sentiasa bergabung dengan diri sendiri

B

Neon exists as monoatomic gas Neon wujud sebagai gas monoatom

C

Neon has stable octet electron arrangement Neon mempunyai susunan elekron octet yang stabil

D

Neon has stable duplet electron arrangement Neon mempunyai susunan duplet yang stabil

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SULIT 13

7

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Which of the following is true about an alkali? Manakah antara berikut adalah benar tentang alkali?

A

An alkali is not corrosive Alkali adalah tidak menghakis

B

An alkali is a base that is soluble in water Alkali ialah bes yang larut dalam air

C

A weak alkali has a high pH value Alkali lemah mempunyai nilai pH yang tinggi

D

A strong alkali has a low degree of ionization Alkali kuat mempunyai darjah pengionan yang rendah

14

Which of the following soluble in water? Antara berikut yang manakah larut di dalam air?

A

Barium sulphate Barium sulfat

B

Ammonium carbonate Ammonium karbonat

C

Calcium carbonate Kalsium karbonat

D

Silver chloride Argentum klorida

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SULIT 15

8

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The preparation process of soap from the reaction between palm oil and natrium hydroxide solution are known as Proses penyediaan sabun melalui tindak balas antara minyak sawit dengan larutan natrium hidroksida dikenali sebagai

A

esterification pengesteran

B

saponification saponifikasi

C

sulphonation sengsulfonan

D

polymerization pempolimeran

16

Which of the following substance is an oxidizing agent? Manakah antara bahan berikut merupakan agen pengoksidaan?

A

Iodide ion Ion iodida

B

Iron (II) ion Ion ferum(II)

C

Dichromate (VI) ion Ion dikromat (VI)

D

Chloride ion Ion klorida

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SULIT 17

9

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Which pair is incorrectly matched? Pasangan manakah yang dipadankan dengan tidak betul?

Type of food additives

Example

Jenis bahan tambah makanan

Contoh

Preservatives

Sodium benzoate

Pengawet

Natrium benzoat

Antioxidants

Ascorbic acid

Antioksidan

Asid askorbik

Flavouring agents

Triphenyl compound

Agent perisa

Sebatian trifenil

Thickening agents

Acacia gum

Agen pemekat

Gum akasia

A

B

C

D

18

Which of the following chemical reactions is an endothermic reaction? Manakah antara tindakbalas kimia berikut yang merupakan tindakbalas endotermik?

A

Respiration Respirasi

B

Combustion Pembakaran

C

Neutralization Peneutralan

D

Photosynthesis Fotosintesis

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SULIT 19

10

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Which of the following substances exist as liquid state at 80oC? Manakah antara bahan berikut wujud sebagai cecair pada suhu 80oC?

Substances

Melting point/oC

Boiling point/oC

Bahan

Takat lebur/oC

Takat didih/oC

I

P

-25.0

50.0

II

Q

55.0

105.0

III

R

-10.0

85.0

IV

S

130.0

600.0

A

I and II I dan II

B

II and III II dan III

C

I and III I dan III

D

I, II and III I, II dan III

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SULIT 20

11

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Which of the glass is suitable to make the following apparatus? Kaca manakah yang paling sesuai untuk menghasilkan radas di bawah?

Diagram 2 Rajah 2

A

Fuse glass Kaca silica terlakur

B

Lead glass Kaca plumbum

C

Borosilicate glass Kaca borosilikat

D

Soda lime glass Kaca soda kapur

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SULIT 21

12

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The diagram shows the electron arrangement of molecule of carbon dioxide CO2 Berikut adalah gambar rajah susunan elektron bagi molekul karbon dioksida CO2

O

C

O

Diagram 3 Rajah 3

Which of the following statements is true about the molecule? Antara berikut, yang manakah benar tentang molekul tersebut ?

A

The compound has high melting point Sebatiannya mempunyai takat lebur yang tinggi

B

Atom C has four pairs of electrons to share Atom C mempunyai empat pasangan elektron dikongsikan

C

The bonding between molecules CO2 is covalent bonding Ikatan antara molekul CO2 ialah ikatan kovalen

D

Each of atom O receives two electrons to form an oxide ion Setiap atom O menerima dua elektron membentuk ion oksida

22

Which of the following equations represents a redox reaction? Manakah antara persamaan berikut mewakili tindak balas redoks?

A

Pb(NO3)2 + CuSO4 → PbSO4 + Cu(NO3)2

B

CH3COOH + NaOH → NaCH3COO + H2O

C

Mg + 2HNO3 → Mg(NO3)2 + H2

D

KOH + HCl → KCl + H2O

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SULIT 23

13

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The following equation shows the redox reaction between copper and silver nitrate solution. Persamaan berikut menunjukkan tindak balas redok antara kuprum dengan larutan argentum nitrat Cu + 2AgNO3 →

Cu(NO3)2 + 2Ag

Which of the following statements is true about this reaction? Antara pernyataan berikut yang manakah benar mengenai tindak balas ini?

A

Silver ion is oxidised Ion argentum dioksidakan

B

Copper is the oxidising agent Kuprum adalah agen pengoksidaan

C

The oxidation number of copper increases Nombor pengoksidaan bagi kuprum bertambah

D

The oxidation number of nitrogen decreases Nombor pengoksidaan bagi nitrogen berkurang

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SULIT 24

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Which of the following shows the correct set-up of apparatus for the purification of copper? Manakah di antara berikut susunan radas yang betul untuk penulenan kuprum?

A

B

C

D

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SULIT 25

15

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Diagram 4 below shows the energy level diagram of the combustion of substance Y. Rajah 4 di bawah menunjukkan aras tenaga untuk pembakaran bahan Y.

Energy Tenaga Y + O2

YO 2

Diagram 4 Rajah 4

Which of the statements is true about the reaction? Antara pernyataan yang berikut, yang manakah benar mengenai tindak balas tersebut? A

Heat is absorbed from the surrounding during the reaction. Haba diserap daripada sekeliling semasa tindak balas.

B

Enthalpy change of the reaction has positive value. Perubahan tenaga tindak balas tersebut mempunyai nilai yang positif.

C

The mass ratio of Y and oxygen is equal in the reaction. Nisbah jisim Y dan oksigen adalah sama dalam tindak balas tersebut.

D

The total energy in Y and O2 is more than that in YO2. Jumlah tenaga dalam Y dan O2 adalah lebih besar berbanding jumlah tenaga dalam YO2.

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SULIT 26

16

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Figure below shows the structure formula for ethyl propanoat. Rajah di bawah menunjukkan formula struktur bagi etil propanoat O ║ CH3-CH2-C-O-CH2-CH3 Diagram 5 Rajah 5

Which of the following both alcohol and carboxylic acids that will produce ethyl propanoate? Antara pasangan alkohol dan asid karboksilik berikut yang manakah menghasilkan etil propanoat?

A

B

C

D

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Alcohols

Carboxylic acid

Alkohol

Asid karboksilik

Etanol

Ethanoic acid

Ethanol

Asid etanoik

Propanol

Ethanoic acid

propanol

Asid etanoik

Ethanol

Propanoic acid

Etanol

Asid Propanoik

Propanol

Propanoic acid

Propanol

Propanoic acid

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SULIT 27

17

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Table 1 shows information about three voltaic cells. Metals X, Y and Z are used as electrodes in the cells. Jadual 1 menunjukkan maklumat tentang tiga sel voltan; Logam-logam X, Y dan Z digunakan sebagai elektrod dalam sel itu.

Voltaic cell Sel voltan I

Negative terminal Terminal negatif X

Positive terminal Terminal positif Y

Voltage(V) Voltan (V) 3.0

II

Z

Y

1.2

III

X

Z

1.8

Table 1 Jadual 1

What is the order of metals from the least electropositive to the most electropositive? Apakah susunan logam daripada yang paling kurang elektropositif kepada yang paling elektropositif?

A

X,Y,Z

B

X,Z,Y

C

Y,Z,X

D

Z,X,Y

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SULIT 28

18

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Diagram 6 below shows an energy level diagram. Rajah 6 di bawah menunjukkan satu gambar rajah aras tenaga.

Diagram 6 Rajah 6 Which of the following is the activation energy for the reaction K + L→ M? Antara berikut, yang manakah merupakan tenaga pengaktifan bagi tindak balas K + L → M? A

P

B

R

C

Q

D

S

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The following table shows the proton number of atom of element X and Y. Jadual berikut menunjukkan nombor proton bagi atom unsur X dan Y.

Element

Proton number

Unsur

Nombor proton

X

13

Y

8

Table 2 Jadual 2

What is the formula of the compound formed when element X is combined with element Y? Apakah formula sebatian yang terbentuk apabila unsur X berpadu dengan unsur Y?

A

XY

B

XY3

C

X3Y2

D

X2Y3

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20

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Table 3 below shows the number of electrons of ion M3Jadual 3 di bawah menunjukkan bilangan elektron bagi ion M3-

Particle

Number of electron

Zarah

Bilangan elektron

Ion M3-

18

Table 3 Jadual 3

What is the position of the element M in the Periodic Table? Apakah kedudukan unsur M dalam jadual Berkala?

Period

Group

Kala

Kumpulan

A

2

3

B

3

15

C

3

17

D

4

2

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SULIT 31

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Which of the following solutions have the same number of hydrogen ions, H+, as in 50 cm3 of 0.1 mol dm-3 sulphuric acid, H2SO4? Antara larutan berikut, yang manakah mempunyai bilangan ion hidrogen, H+, sama seperti dalam 50 cm30.1 mol dm-3 asid sulfurik, H2SO4?

I

100 cm3 of 0.1 mol dm-3 hydrochloric acid, HCl 100 cm3 0.1 mol dm-3asid hidroklorik, HCl

II

50 cm3 of 0.2 mol dm-3 nitric acid, HNO3 50 cm3 0.2 mol dm-3asid nitrik, HNO3

III

100 cm3 of 0.1 mol dm-3ethanoic acid, CH3COOH 100 cm3 0.1 mol dm-3asid etanoik, CH3COOH

IV

50 cm3 of 0.1 mol dm-3 phosphoric acid, H3PO4 50 cm3 0.1 mol dm-3asid fosforic, H3PO4

A

I and II only I dan II sahaja

B

I and III only I dan III sahaja

C

III and IV only III dan IV sahaja

D

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

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SULIT 32

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Diagram 7 shows the set up of the apparatus of an experiment. Rajah 7 menunjukkan susunan radas suatu eksperimen

Lead (II) chloride solution Larutan plumbum (II) klorida

Lead (II) nitrate solution Larutan plumbum (II) nitrat

Potassium chloride solution Larutan kalium klorida Diagram 7 Rajah 7

What is the process shown in Diagram 7 ? Apakah proses yang di tunjukkan di dalam Rajah 7 ?

A

Preparation of soluble salt Penyediaan garam terlarutkan

B

Preparation of in soluble salt Penyediaan garam tak terlarutkan

C

Purification of insoluble salt Penulenan garam tak terlarutkan

D

Purification of soluble salt Penulenan garam terlarutkan

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Diagram 8 below shows molecular formulae of two hydrocarbon compounds. Rajah 8 di bawah menunjukkan formula molekul bagi dua sebatian hidrokarbon.

H

H

H

H

H

C

C

C

C

H

H

H

C

H

H

H

H

H

H

H

C

C

C

C

H

H H

C

H H

H

H

Compound B Sebatian B

Compound A Sebatian A

Diagram 8 Rajah 8

Which of the following is true about compounds A and B? Antara berikut, yang manakah benar tentang sebatian A dan B?

A

Compound B is soluble in water. Sebatian B larut dalam air

B

Compound A is soluble in water. Sebatian A larut dalam air

C

Compound B is an unsaturated hydrocarbon Sebatian B adalah hidrokarbon tak tepu

D

Compound A is an unsaturated hydrocarbon Sebatian A adalah hidrokarbon tak tepu

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SULIT 34

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In an experiment to determine the heat of neutralization for the reaction between nitric acid and sodium hydroxide solution, 50 cm3 of 1.0 mol dm-3 nitric acid is added to 50 cm3 of 1.0 mol dm-3 sodium hydroxide solution in a plastic cup. The temperature increases from 30.0°C to 36.5°C. Calculate the heat of neutralization. (Specific heat capacity of water = 4.2 J/g°C) Dalam satu eksperimen untuk menentukan haba peneutralan untuk tindak balas di antara asid nitrik dan natrium hidroksida, 50 cm3asid nitrik berkepekatan 1.0 mol dm-3ditambah kepada 50 cm3larutan natrium hidroksida berkepekatan 1.0 mol dm-3dalam sebuah cawan plastik. Suhu meningkat dari 30.0°C kepada 36.5°C. Kirakan haba peneutralan. (Muatan haba tentu air = 4.2 J/g°C)

A

18.2 kJ 18.2 kJ

B

27.3 kJ 27.3kJ

C

36.4 kJ 36.4 kJ

D

54.6 kJ 54.6 kJ

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SULIT 35

25

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The following equation shows the decomposition of hydrogen peroxide, H2O2. 2H2O2(l) → 2H2O(l) + O2(g) What is the volume of oxygen gas, O2 produced from the decomposition of 500 cm3 of 2 mol dm-3 hydrogen peroxide at standard temperature and pressure (STP)? [Molar volume of gas at STP = 22.4 dm3 mol-1] Persamaan berikut menunjukkan penguraian bagi hidrogen peroksida, H2O2. 2H2O2(ce) → 2H2O(ce) + O2(g) Berapakah isi padu gas oksigen, O2 terhasil daripada penguraian 500 cm3 hidrogen peroksida 2 mol dm-3 pada suhu dan tekanan piawai (STP)? [Isi padu molar gas pada STP = 22.4 dm3 mol-1] A

11.2 dm3 11.2 dm3

B

22.4 dm3 22.4 dm3

C

33.6 dm3 33.6 dm3

D

44.8 dm3 44.8 dm3

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Diagram below shows three substances, X, Y and Z. Rajah di bawah menunjukkan tiga jenis bahan, X, Y, dan Z.

Diagram 9 Rajah 9

Which of the following statements about the substances in diagram 9 above are correct? Antara penyataan berikut, yang manakah benar tentang bahan-bahan pada rajah 9 di atas?

I

Solid Z has more particles than gas X. Pepejal Z mempunyai bilangan zarah yang lebihbanyak daripada gas X.

II

Gas X consists of two or more types of atoms. Gas X terdiri daripada dua atau lebih jenis atom.

III

All the substances have different numbers ofparticles. Kesemua bahan mempunyai bilangan zarah yangberlainan.

IV

The number of particles in liquid Y is6.02 × 1023. Bilangan zarah dalam cecair Y ialah sebanyak6.02 × 1023.

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27

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I and II I dan II

B

I and III I dan III

C

II and IV II, dan IV

D

III and IV III dan IV

37

Methanol, CH3OH, is a carbon compound that has a high potential as a fuel. The combustion of methanol in oxygen produces carbon dioxide gas according to the following equation: Metanol, CH3OH ialah satu sebatian karbon yang berpotensi tinggi sebagai bahan api. Pembakaran metanol dan oksigen menghasilkan gas karbon dioksida menurut persamaan berikut:

2CH3OH(l) + 3O2(g) ➞2CO2(g) + 4H2O(l) 2CH3OH(ce) + 3O2(g) ➞2CO2(g) + 4H2O(ce)

What is the number of moles of methanol needed to produce 1200 cm3 of carbon dioxide at room conditions? Berapakah bilangan mol metanol yang diperlukan untuk menghasilkan 1200 cm3 gas karbon dioksida pada keadaan bilik? [Molar volume of gas = 24 dm–3 mol–1 at room condition] [Isi padu molar gas = 24 dm–3 mol–1 pada keadaan bilik]

A

0.01 mole 0.01 mol

B

0.02 mole 0.02 mol

C

0.04 mole 0.04 mol

D

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0.05 mol 38

“The higher the number of effective collisions there are in a reaction, the higher the rate of reaction will be” “Semakin tinggi perlanggaran berkesan, semakin tinggi kadar tindak balas”

Based on the above statement, what is the meaning of effective collision? Berdasarkan penyataan di atas, apakah maksud bagi perlanggaran berkesan?

A

The collision that has the highest energy Perlanggaran yang mempunyai tenaga tertinggi

B

The collision that can cause reaction Perlanggaran yang menyebabkan tindak balas

C

The collision which takes place before reaction Perlanggaran yang berlaku sebelum tindak balas

D

The collision with energy which is less than the activation energy Perlanggaran yang mempunyai tenaga yang lebih rendah daripada tenaga pengaktifan

39

A restaurant owner wants to use colourful electric lamps to attract customers. Which substance is suitable to be used in the lamp? Pemilik sebuah restoran ingin menggunakan lampu elektrik berwarna-warni untuk menarik pelanggan. Bahan manakah yang sesuai digunakan dalam lampu itu?

A

Neon Neon

B

Argon Argon

C

Krypton Krypton

D

Xenon Xenon

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Table 4 shows the result of a series of tests carried out on a solution of salt J. Jadual 4 menunjukkan keputusan beberapa siri ujian yang dijalankan terhadap satu larutan garam J. Test Ujian

Observation Pemerhatian

Add dilute sulphuric acid Tambahkan asid sulfurik cair

No changes Tiada perubahan

Add lead(II) nitrate solution , then heat it Tambahkan plumbum(II)nitrat, kemudian panaskan

White precipitate dissolves when heated. Mendakan putih larut apabila dipanaskan

Add sodium hydroxide solution until in excess Tambahkan larutan natrium hidroksida sehingga berlebihan Add ammonia solution until in excess Tambahkan larutan ammonia berlebihan

White precipitate is formed. It is insoluble in excess sodium hydroxide solution Mendakan putih terbentuk. Mendakan tidak larut dalam natrium hidroksida berlebihan White precipitate is formed. It is insoluble in excess ammonia solution Mendakan putih terbentuk. Mendakan tidak larut dalam larutan ammonia berlebihan Table 4 Jadual 4

Based on the results of the experiment, what is salt J? Berdasarkan keputusan eksperimen, apakah garam J?

A

Magnesium chloride Magnesium klorida

B

Zinc sulphate Zink sulfat

C

Zinc chloride Zink klorida

D

Magnesium sulphate Magnesium sulfat

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Diagram 10 show two aqueous solutions. Rajah 10 menunjukkan dua jenis larutan akueus

HCl 0.1 mol dm-3

HCl

CH3COOH 0.1 mol dm-3

Diagram 10CH3COOH -3

0.1 mole dm

Rajah 100.1 mole dm-3

Which of the following statements is true? Yang manakah antara pernyataan berikut adalah benar?

A

Both solutions are strong acid Kedua-dua larutan merupakan asid kuat

B

The pH of both solutions are equal pH untuk kedua-dua larutan adalah sama

C

Both solutions has low degree of ionization Kedua-dua larutan mempunyai darjah pengionan yang rendah

D

Both solution can react with sodium hydroxide solution Kedua-dua larutan boleh bertindak balas dengan larutan natrium hidroksida

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Diagram 11 shows a set up apparatus of voltaic cell. Rajah 11 menunjukkan susunan radas bagi sel voltan.

Diagram 11 Rajah 11

What can be observed from the cell after a few minutes? Apakah pemerhatian yang berlaku pada sel ini selepas beberapa minit?

A

Brown deposited occuredat magnesium elctrode Terdapat enapan perang di elektrod magnesium

B

Corrosion of metal occurred at copper electrode Terdapat kakisan logam di elektrod kuprum

C

Changes of colour from blue coloured solution to colourless solution Terdapat perubahan warna dari larutan berwarna biru ke larutan tanpa warna

D

Colourless gas bubbles released at copper electrode Terdapat gelembung gas tak berwarna terbebas di elektrod kuprum

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Propene reacts with bromine to produce compound Q Propena bertindak balas dengan bromin menghasilkan sebatian Q CH3 – CH = CH2 + Br2 → Q

Name compound Q using IUPAC Namakan sebatian Q mengikut IUPAC

A

1,1 – dibromopropane 1,1 – dibromopropana

B

1,2 – dibromopropane 1,2 – dibromopropana

C

1,2 – dibromopropene 1,2 – dibromopropena

D

2,3 – dibromopropane 2,3 – dibromopropana

44

5.6 g of potassium hydroxide is dissolved in distilled water to form 250 cm3 solution. What is the concentration of the sodium hydroxide solution? 5.6 g kalium hidroksida dilarutkan ke dalam 250 cm3 air suling. Apakah kepekatan larutan kalium hidroksida itu? [Relative atomic mass: H=1; K=39; O=16] [Jisim atom relatif: H=1; K=39; O=16]

A

0.25 mole dm-3 0.25 mol dm-3

B

0.02 mole dm-3 0.02 mol dm-3

C

1.12 mole dm-3 1.12 mol dm-3

D

0.40 mole dm-3 0.40 mol dm-3

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Chicken cooked in a pressure cooker cooks faster. Which of the following explains the situation? Ayam yang dimasak dengan periuk tekanan lebih cepat masak. Antara berikut yang manakah menjelaskan situasi tersebut?

A

The activation energy decreases Tenaga pengaktifan berkurangan

B

The kinetic energy decreases Tenaga kinetik berkurangan

C

The total surface area exposed to reaction increases Jumlah luas permukaan yang terdedah kepada tindak balas bertambah

D

The frequency of effective collisions increases Frekuensi perlanggaran berkesan bertambah

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Diagram 12 below shows the energy profile diagram for the following reactions. Rajah 12 di bawah menunjukkan gambar rajah aras tenaga bagi tindak balas berikut. K+L→M+N Energy Tenaga

K+L

120 kJ

75 kJ M +N

Diagram 12 Rajah 12

What is the value of the activation energy? Apakah nilai tenaga pengaktifan?

A

25 kJ 25 kJ

B

45 kJ 45 kJ

C

75 kJ 75 kJ

D

120 kJ 120 kJ

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The following chemical equation shows the reaction between zinc and silver nitrate solution. Persamaan kimia berikut menunjukkan tindak balas di antara zink dengan larutan argentum nitrat. Zn(s) + 2AgNO3(aq) → 2Ag(s) + Zn(NO3)2(aq)

ΔH= -310kJmol-1

Which of the statements are true concerning the reaction above? Antara pernyataan berikut yang manakah yang benar mengenai tindak balas di atas? [Relative atomic mass of Ag = 108, Zn =65] [Jisim atom relative Ag =108, Zn = 65]

I

Zinc metal is oxidised Logam zink dioksidakan

II

The temperature of the mixture increases during reaction Suhu campuran meningkat semasa tindak balas

III

When 10.8g of silver is displaced, 31kJ of heat is released Bila 10.8g argentum disesarkan, 31kJ haba dibebaskan

IV

When 6.5g of zinc is reacted, 31kJ of heat is released Bila 6.5g zink ditindak balaskan, 31kJ haba dibebaskan

A

I and II I dan II

B

III and IV III dan IV

C

I, II and IV I, II dan IV

D

II, III and IV II, III dan IV

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Diagram 13 shows the set up of apparatus to investigate redox reaction in terms of the transfer of electron at a distance. Rajah 13 menunjukkan susunan radas bagi mengkaji tindak balas redoks berdasarkan pemindahan elektron pada suatu jarak. G

Carbon electrode Elektrod karbon Potassium manganate(VII) solution

Potassium iodide solution

Larutan kalium manganat(VII)

Larutan kalium iodida

Dilute sulphuric acid Asid sulfuric cair Diagram 13 Rajah 13

Which of the following statement is true about this experiment? Manakah antara penyataan berikut adalah benar bagi eksperimen ini?

A

Oxidation number of iodine increase from -1 to 0. Nombor pengoksidaan iodin bertambah dari -1 kepada 0

B

Electron flow from potassium manganate (VII) solution to potassium iodide solution. Electron mengalir daripada larutan kalium manganat (VII) kepada larutan kalium iodida

C

Iodide ion act as oxidizing agent Iodin bertindak sebagai agen pengoksidaan

D

Manganate (VII) ion undergo oxidation Ion manganat (VII) mengalami pengoksidaan

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A student doing an experiment in laboratory to study the heat of combustion of propanol, C3H7OH. The following shows the information obtained. Seorang pelajar menjalankan eksperimen di dalam makmal untuk mengkaji haba pembakaran propanol, C3H7OH. Berikut ialah maklumat yang diperolehi. Volume of water in the cuprum container = 200cm3 Isi padu air dalam bekas kuprum = 200cm3 Initial temperature of the water in the cuprum container = 28.5 oC Suhu awal air dalam bekas kuprum = 28.5 oC

What is the highest temperature, ToC obtained in this experiment if 9.0 g of propanol is completely burnt? [Specific heat capacity of water = 4.2 Jg-1 oC-1] [Relative molecular mass of propanol = 60] [Heat of combustion of propanol = -173.6 kJ mol-1] Apakah suhu tertinggi ToC yang diperolehi dalam eksperimen ini jika 9.0 propanol terbakar lengkap? [Muatan haba tentu air = 4.2 Jg-1 oC-1] [Jisim molekul relatif propanol = 60] [Haba pembakaran butanol = -173.6 kJ mol-1]

A

42.0 oC

B

31.0 oC

C

60.0 oC

D

65.5 oC

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Diagram 14 shows some aspirin tablets. Young children cannot be given aspirin to reduce fever because Rajah 14 menunjukkan beberapa biji tablet aspirin. Kanak-kanak tidak boleh diberi aspirin untuk menurunkan suhu akibat demam kerana

Diagram 14 Rajah 14

A

aspirin causes allergy. aspirin menyebabkan kesan alergi.

B

aspirin is acidic and causes intestinal wall bleeding. aspirin bersifat asid yang menyebabkan dinding usus mengalami pendarahan.

C

aspirin reacts with gastric juice to form poisonous chemicals. aspirin boleh bertindak balas dengan jus gastik dan menghasilkan bahan beracun.

D

aspirin reacts with the food consumed to form acidic substance. aspirin bertindak balas dengan makanan di makan membentuk bahan berasid.

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