sijil pelajaran malaysia 4541/1 · pdf filex ialah proses di mana pepejal berubah menjadi gas....

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4541/1© Hak Cipta JUJ Pahang 201 [Lihat halaman sebelah SULIT

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SIJIL PELAJARAN MALAYSIA 4541/1 CHEMISTRY Paper 1 1 ¼ jam Satu jam lima belas minit

JANGAN BUKA KERTAS SOALAN INI SEHINGGA DIBERITAHU

1. Kertas soalan ini adalah dalam dwibahasa

2. Soalan dalam Bahasa Inggeris mendahului soalan yang sepadan dalam Bahasa Melayu.

3. Calon dikehendaki membaca maklumat di halaman depan kertas soalan ini.

Kertas soalan ini mengandungi 26 halaman bercetak

SOALAN PRAKTIS BESTARI PROJEK JAWAB UNTUK JAYA (JUJ) 2016

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4541/1 2 PRAKTISBESTARI2016

4541/1 © Hak Cipta JUJ Pahang 2016 [Lihat halaman sebelah SULIT

1. X is a process where solid change to gas. X ialah proses di mana pepejal berubah menjadi gas.

Which of the following is process X? Antara berikut yang manakah proses X?

A. Evaporation Penyejatan

B. Sublimation Pemejalwapan

C. Condensation Kondensasi

D. Boiling Pendidihan

2. Which scientist found the movement of electron in a shell of an atom? Siapakah saintis yang menemui pergerakan elektron di dalam petala suatu atom?

A. Neils Bohr

B. John Dalton

C. James Chadwick

D. Ernest Rutherford

3. Which inter-conversion involves the absorption of energy? Perubahan keadaan manakah yang melibatkan penyerapan tenaga?

A. Steam Ice Stim Ais

B. Steam Water Stim Air

C. Water Ice Air Ais

D. Ice Steam Ais Stim



4. Which of the following elements are placed in group 18 in the Periodic Table of Elements?

Antara unsur berikut, yang manakah terletak di dalam kumpulan 18 dalam Jadual Berkala Unsur?

A. Helium and Hydrogen Helium dan hidrogen

B. Oxygen and krypton Oksigen dan kripton

C. Helium and krypton Helium dan kripton

D. Hydrogen and oxygen Hidrogen dan oksigen.

5. Which of the following statements explain why the reactivity of element in Group 17 decreases when going down the group?

Antara pernyataan berikut, yang manakah menerangkan mengapa kereaktifan unsur kumpulan 17 berkurang apabila menuruni kumpulan?

A. The melting points of the elements decrease. Takat lebur bagi unsur berkurang.

B. The valence electron gets more easier to be released. Elektron valens semakin mudah dilepaskan.

C. The attractive force between valence electron and the nucleus becomes weaker. Daya tarikan antara elektron valens dengan nukleus semakin lemah.

D. The physical state of the elements change from solid to liquid then to gas at room temperature. Keadaan fizik bagi unsur berubah daripada pepejal kepada cecair dan kemudian kepada gas pada suhu bilik.



6. What is the meaning of ionic bond? Apakah maksud ikatan ion?

A. A bond formed when metal atoms contribute electrons to each other to achieve a stable electron arrangement. Ikatan yang terbentuk apabila atom-atom logam menyumbangkan elektron kepada satu sama lain untuk mencapai susunan elektron yang stabil.

B. A bond formed when non-metal atoms share electrons to achieve a stable electron arrangement. Ikatan yang terbentuk apabila atom-atom bukan logam berkongsi elektron untuk mencapai susunan elektron yang stabil.

C. A bond formed by weak Van Der Waals forces between the non-metal atoms. Ikatan yang terbentuk oleh daya Van Der Waals yang lemah di antara atom-atom bukan logam.

D. A bond formed when a metal atom transfers an electron to a non-metal atom. Ikatan yang terbentuk apabila satu atom logam memindahkan elektron ke satu atom bukan logam.

7. Which of the following substances is an electrolyte? Antara bahan berikut, yang manakah elektrolit?

A. Pure ethanol Etanol tulen

B. Ethanoic acid

Asid etanoik

C. Molten naphthalene Naftalena lebur

D. Tetrachloromethane

Tetraklorometana



8. The following electrolytic cells used carbon as electrodes. Which of the cells will light up the bulb?

Sel elektrolisis berikut menggunakan karbon sebagai elektrod. Sel yang manakah akan menyebabkan mentol menyala?

A

B

C

D

Sodium chloride solution Larutan natrium klorida

Ethanol Etanol

Glucose solution Larutan glukosa

Tetrachloromethane Tetraklorometana



9. Which of the following acids is a strong acid? Antara asid berikut yang manakah asid kuat? A Citric acid C Ethanoic acid Asid sitrik Asid etanoik B Nitric acid D Palmitic acid Asid nitrik Asid palmitik 10 Which of the following salts is soluble in water? Yang manakah antara garam-garam berikut larut dalam air? A Lead(II) sulphate C Silver chloride Plumbum(II) sulfat Argentum klorida B Potassium chloride D Barium sulphate Kalium klorida Barium sulfat 11 Which of the following equations will not produce precipitate when they react?

Antara persamaan berikut yang manakah tidak akan menghasilkan mendakan apabila bertindak balas?

A Na2SO4 + Ba((NO3)2 BaSO4 + 2NaNO3 B Ag2SO4 + 2KCl 2AgCl + K2SO4

C Pb(NO3)2 + CuSO4 PbSO4 + Cu(NO3)2

D 2KCl + Na2CO3 K2CO3 + 2NaCl 12 Alloy is harder than its pure metal because Aloi lebih keras daripada logam tulennya kerana A the atom is orderly arranged susunan atom lebih teratur B the melting point of alloy is higher takat lebur aloi lebih tinggi C the atoms are not easily slide atom-atom tidak mudah menggelongsor D the size of atom in alloy is smaller than the size of atom in pure metal atom dalam aloi bersaiz lebih kecil berbanding atom dalam logam tulen



13 Which of the following pair of manufactured substances in industry and its uses is correct? Antara pasangan bahan buatan industri dan kegunaanya, yang manakah betul?

Manufactured substances in industry Bahan buatan dalam industri

Uses Kegunaan

A Lead glass Kaca plumbum

Mirror Cermin

B Polyethene Polietena

Lenses Kanta

C Photochromic glass Kaca fotokromik

Optical lenses Kanta cermin mata

D Plastic reinforced with glass Plastik yang diperkukuh dengan kaca

Test tube Tabung uji

14. Which of the following statement explains the meaning of effective collision? Manakah di antara pernyataan berikut menerangkan maksud pelanggaran berkesan? A The collision that has a low energy

Pelanggaran yang mempunyai tenaga yang rendah

B The collision that causes a reaction Pelanggaran yang menyebabkan tindak balas

C The collision which takes place before a reaction Pelanggaran yang berlaku sebelum tindak balas

D The collision where its energy is less than the activation energy Pelanggaran di mana tenaga adalah kurang daripada tenaga pengaktifan

.



15. The diagram shows the energy profile of a chemical reaction. Ea is the activation energy for the reaction. Rajah menunjukkan profil tenaga satu tindak balas kimia. Ea adalah tenaga pengaktifan bagi tindak balas itu.

What will change the activation energy from Ea to Ea’ ? Apakah yang mengubah tenaga pengaktifan dari Ea to Ea’ ?

A Catalyst Mangkin

B Temperature Suhu

C Concentration Kepekatan

D Total surface area Jumlah luas permukaan

16. Which of the following are the products produced after ethanol is burnt completely in

excess oxygen? Antara berikut yang manakah hasil yang terbentuk selepas etanol terbakar dengan lengkap dalam oksigen berlebihan?

A Water and carbon dioxide gas Air dan gas karbon dioksida B Water and carbon monoxide gas Air and gas karbon monoksida C Water, karbon and carbon dioxide gas Air, karbon dan gas karbon dioksida D Water, carbon, carbon monoxide gas and carbon dioxide gas Air, karbon, gas karbon monoksida dan gas karbon dioksida

Energy Tenaga

Ea E’

a Reactants Bahan tindak balas

Products Hasil tindak balas



17. An element undergoes oxidation when Satu unsur menjalani pengoksidaan apabila

A. It loses oxygen Ia kehilangan oksigen

B. It gains electrons Ia menerima elektron

C. It loses hydrogen Ia kehilangan hidrogen

D. Its oxidation number decreases Nombor pengoksidaannya berkurang

18. Which of the following is true about the heat of the combustion for ethanol, propanol and butanol? Manakah yang berikut adalah benar tentang haba pembakaran untuk etanol, propanol dan butanol?

19. The joint of a student’s leg is swollen and painful. Which of the following medicine is

suitable to release the pain? Sendi kaki seorang pelajar bengkak dan sakit. Antara ubat berikut yang manakah

sesuai untuk meredakan kesakitan tersebut?

A. Insulin Insulin B. Penicillin Penicillin C. Barbiturate Barbiturat D. Paracetamol Parasetamol

Ethanol Etanol

Propanol Propanol

Butanol Butanol

A -2015 kJ mol-1 -1376 kJ mol-1 -725 kJ mol-1

B -2015 kJ mol-1 -2676 kJ mol-1 -725 kJ mol-1

C -2676 kJ mol-1 -725 kJ mol-1 -1376 kJ mol-1

D -1376 kJ mol-1 -2015 kJ mol-1 -2676 kJ mol-1



( 5p,6n )

20. Which of the following is true about soap or detergent? Antara berikut yang manakah benar tentang sabun atau detergen? A. Detergent forms scum in hard water Detergen membentuk kekat dalam air liat. B. Soap forms scum in soft water. Sabun membentuk kekat dalam air lembut. C. Scum decreases the effectiveness of the cleansing action of a soap. Kekat mengurangkan keberkesanan tindakan pencucian sabun. D. The present of magnesium ions in hard water react with detergent to form scum. Kehadiran ion-ion magnesium dalam air liat bertindak balas dengan detergen

membentuk kekat. 21. Diagram below shows the atomic structure of a boron atom. Rajah di bawah menunjukkan struktur atom bagi atom boron. Which of the following is true about this atom? Antara berikut yang manakah benar tentang atom ini?

A. The proton number is 3 Nombor proton ialah 3

B. The nucleon number is 3 Nombor nukleon ialah 3

C. The number of electrons is 5 Bilangan elektron ialah 5

D. The number of valance electrons is 5 Bilangan elektron valens ialah 5



22. Which of the following has a similar empirical formula with glucose, C6H12O6 ? Antara bahan-bahan berikut yang manakah mempunyai formula empirik yang sama dengan glukosa, C6H12O6 ?

A. Ethanol, C2H5OH Etanol, C2H5OH

B. Ethanoic acid, CH3COOH Asid etanoik, CH3COOH

C. Ethyl ethanoate, CH3COOC2H5 Etil etanoat, CH3COOC2H5

D. Ethyl propanoate, C2H5COOC2H5

Etil propanoat, C2H5COOC2H5

23. The empirical formula of copper(II) oxide is determined by its reaction with hydrogen gas. Which of the following shows the reason why dry hydrogen gas is still passed through during cooling? Formula empirik kuprum(II) oksida ditentukan melalui tindak balasnya dengan gas hidrogen. Antara berikut yang manakah menunjukkan sebab mengapa gas hidrogen kering masih dialirkan semasa proses penyejukkan?

A. To ensure the reaction is complete. Untuk memastikan tindak balas lengkap.

B. To get a constant mass of product. Untuk mendapatkan jisim hasil yang tetap.

C. To enable the copper reacts with oxygen in the air. Untuk membolehkan kuprum bertindak balas dengan oksigen dalam udara.

D. To prevent copper reacts with oxygen in the air Untuk mengelakkan kuprum bertindak balas dengan oksigen di udara.



24. Table below shows the proton number of elements M and N. Jadual di bawah menunjukkan nombor proton bagi unsur M dan N.

Element Unsur

Proton number Nombor proton

M 9

N 17

Which of the following statements are true about elements M and N? Antara pernyataan berikut yang manakah benar tentang unsur M dan N? I. Atom M and N have one valence electron.

Atom M dan N mempunyai satu elektron valens.

II. Element M is more reactive than element N Unsur M lebih reaktif berbanding unsur N

III. Atom M has a smaller size than atom N Atom M mempunyai saiz atom lebih kecil berbanding atom N

IV. Element M and N are in the same group in the Periodic Table of Elements. Unsur M dan N berada dalam kumpulan yang sama dalam Jadual Berkala Unsur.

A. I and II only

I dan II sahaja B. III and IV only

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

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

II, III dan IV sahaja



25. The table shows information about two types of particle. Jadual menunjukkan maklumat bagi dua jenis zarah.

Particle Zarah

Proton number Nombor proton

Electron arrangement Susunan elektron

P 11 2.8 Q 19 2.8.8

Based on the information in the table, both particle P and Q are Berdasarkan maklumat dalam jadual, zarah P dan Q adalah

A. Inert gas Gas adi

B. Negative ions Ion negatif

C. Positive ions Ion positif

D. Isotopes of the same element Isotop unsur yang sama

26. Diagram below shows the atom of elements Q and R. Rajah di bawah menunjukkan atom unsur Q dan R.

Q3517

R126

Which of the following is the physical properties of the compound produce when R react with Q? Antara yang berikut yang manakah merupakan sifat fizik bagi sebatian yang terbentuk apabila R bertindak balas dengan Q?

A. Dissolve in water

Larut dalam air.

B. Does not dissolve in organic solvent. Tidak larut dalam pelarut organik

C. Has high melting and boiling point Mempunyai takat lebur dan didih yang tinggi

D. Does not conduct electricity in molten and aqueous solution. Tidak mengkonduksikan elektrik dalam keadaan leburan dan larutan akueus.



27. The diagram below shows the set-up of the apparatus used to electroplate an iron spoon with copper.

Rajah menunjukkan susunan radas yang digunakan untuk menyadur kunci besi dengan kuprum.

Which of the followings is the observation at the anode and cathode? Antara berikut yang manakah pemerhatian di anod dan di katod?

28 Which of the following is true about weak alkali? Antara berikut yang manakah benar mengenai alkali lemah? A The pH value is less than 7 Nilai pH kurang daripada 7 B Unable to neutralize acid Tidak boleh meneutralkan asid C Able to change blue litmus paper to red Boleh menukarkan warna kertas litmus biru kepada merah D Ionizes partially in water to produce low concentration of hydroxide ions Mengion separa dalam air untuk menghasilkan kepekatan ion hidroksida yang rendah

Anode Anod

Cathode Katod

A Brown deposits formed Enapan perang terbentuk

Copper plate becomes thicker Kepingan kuprum menjadi tebal

B Copper plate becomes thinner Kepingan kuprum menjadi nipis

Brown deposits formed Enapan perang terbentuk

C Brown deposits formed Enapan perang terbentuk

Gas bubbles released Gelembung gas terbebas

D Copper plate becomes thinner Kepingan kuprum menjadi nipis

Gas bubbles released Gelembung gas terbebas

Copper plate Kepingan kuprum

Iron spoon Sudu besi

Copper(II) sulphate solution Larutan kuprum(II)sulfat



29 Solid Q is heated strongly. The colour of the residue is brown when hot and yellow when cold. What is solid Q?

Pepejal Q dipanaskan dengan kuat. Warna bakinya adalah perang semasa panas dan kuning semasa sejuk. Apakah pepejal Q?

A Calcium carbonate C Lead(II) carbonate Kalsium karbonat Plumbum(II) karbonat B Sodium carbonate D Zinc carbonate Natrium karbonat Zink karbonat 30. Which of the following reactants produce the highest rate of the reaction when zinc

powder reacts with acid? Antara berikut bahan tindak balas manakah yang menghasilkan kadar tindak balas tertinggi apabila serbuk zink bertindak balas dengan asid? A 25 cm3 of 0.1 mol dm-3 nitric acid

25 cm3 asid nitrik 0.1 mol dm-3

B 25 cm3 of 0.1 mol dm-3 ethanoic acid

25 cm3 asid etanoik 0.1 mol dm-3

C 25 cm3 of 0.1 mol dm-3sulphuric acid

25 cm3 asid sulfurik 0.1 mol dm-3

D 25 cm3 of 0.1 mol dm-3 hydrochloric acid 25 cm3 asid hidroklorik 0.1 mol dm-3

31. The structural formulae of two isomers are as follows. Struktur formula untuk dua isomer adalah seperti berikut.

H H H H H H H Br H – C – C – C – C – H H – C – C – C – C – H H H Br H H H H H

Which of the following names is true for both isomers? Antara nama berikut, yang manakah benar bagi kedua-dua isomer? A Bromoethane

Bromoetana C Bromobutane

Bromobutana

B Bromopropane Bromopropana

D

Bromopentane Bromopentana



32. The table below shows the heat of combustion for three alcohols. Jadual di bawah menunjukkan haba pembakaran bagi tiga alkohol.

Alcohol/ Alkohol

Heat of Combustion/kJ mol-1

Haba Pembakaran / kJ mol -1

CH3OH -710

C2H5OH -1370

C4H9OH -2670

Which of the following statements explain why the heat of combustion of alcohol

increased? Antara pernyataan berikut, yang manakah menerangkan mengapa haba pembakaran

alkohol meningkat?

A Size of molecule decreases Saiz molekul berkurang B Number of oxygen atom per molecule increases Bilangan atom oksigen per molekul bertambah C Number of carbon atom per unit molecule increases Bilangan atom karbon per molekul bertambah D Number of hydrogen atom per unit molecule decreases Bilangan atom hidrogen per molekul berkurang

33. Which of the following substance will change the colour of iron(II) sulphate solution

from light green to brown? Antara bahan berikut yang manakah akan menukarkan warna larutan ferum(II) sulfat

daripada hijau muda kepada perang?

A chlorine water air klorin B sulphuric acid asid sulfurik C sodium hydroxide natrium hidroksida D sulphur dioxide gas gas sulfur dioksida



34. Diagram below shows the energy level diagram for a reaction. Rajah di bawah menunjukkan rajah aras tenaga bagi suatu tindak balas.

What conclusion can be made from the diagram? Apakah kesimpulan yang boleh dibuat daripada rajah itu? A. Heat is released in the reaction Haba dibebaskan dalam tindakbalas itu B. Heat is needed to initiate the reaction. Haba diperlukan untuk memulakan tindak balas C. OH- ions contain more energy than H+ ions. Ion OH- mengandungi lebih tenaga berbanding dengan ion H+

D. The product contains more energy than reactant. Hasil tindak balas mengandungi tenaga yang lebih berbanding bahan tindak balas

35. Which of the following gases contains 0.8 mole of atoms at room conditions? [1 mole of gas occupies the volume of 24 dm3 at room conditions ] Antara gas berikut yang manakah mengandungi 0.8 mol atom pada keadaan bilik? [1 mol gas menempati isipadu sebanyak 24 dm3 pada keadaan bilik ]

A. 9.6 dm3 He

B. 9.6 dm3 H2

C. 9.6 dm3 SO3

D. 9.6 dm3 CO2

H2O (l/ce)

OH-(aq/ak) + H+-(aq/ak)

Energy tenaga



36. Diagram below shows the structure of soap ion. Rajah di bawah menunjukkan struktur ion sabun.

Which of the following statements is true about soap ion? Antara pernyataan berikut yang manakah benar tentang ion sabun? A. Parts X and part Y are soluble in water. Bahagian X dan bahagian Y larut dalam air. B. Parts X and Y are soluble in grease. Bahagian X dan bahagian Y larut dalam gris. C. Part X is soluble in grease and part Y is soluble in water. Bahagian X larut dalam gris dan bahagian Y larut dalam air. D. Part X is soluble in water and part Y is soluble in grease. Bahagian X larut dalam air dan bahagian Y larut dalam gris.

37. The following equation shows the decomposition reaction of calcium carbonate when heated at room condition. Persamaan berikut menunjukkan tindak balas penguraian kalsium karbonat apabila dipanaskan pada keadaan bilik.

CaCO3 CaO + CO2

Which of the following statement is not true when 1 mole of calcium carbonate is decomposed? [Relative atomic mass : Ca = 40; C = 12; O = 16 and 1 mole of gas occupies the volume of 24 dm3 at room condition] Antara berikut yang manakah tidak benar apabila 1mol kalsium karbonat terurai? [Jisim atom relatif : Ca = 40, C = 12, O = 16 dan 1mol gas menempati isipadu sebanyak 24 dm3 pada keadaan bilik.]

A. 1 mole of calcium carbonate is formed.

1 mol kalsium karbonat terbentuk.

B. 1 molecule of carbon dioxide gas is given off. 1 molekul gas karbon dioksida terbebas.

C. 56 g of calcium oxide is formed. 56 g kalsium oksida terbentuk

D. 24 dm3 of carbon dioxide gas is given off. 24 dm3 gas karbon dioksida terbebas.

COO - Part X Part Y Bahagian X Bahagian Y



t 1 t 2 t 3

38. Diagram below shows the heating curve of solid Y. Rajah di bawah menunjukkan lengkung pemanasan bagi pepejal Y

Which of the following statement can be deduced from the diagram above? Antara pernyataan berikut yang manakah boleh dirumuskan daripada rajah di atas? A. At t1, Y exist as liquid.

Di t1, Y wujud sebagai cecair. B. The melting point of Y is 70ºC

Takat lebur Y ialah 70 ºC C. From t1 to t2 , Y does not absorb heat energy.

Dari t1 ke t2 , Y tidak menyerap tenaga haba. D. From t2 to t3, the particles are uniformly packed.

Dari t2 ke t3 , zarah-zarah tersusun padat dan teratur

39 Which of the following acids contain the highest number of mol of hydrogen ion? Antara asid berikut yang manakah mengandungi bilangan mol ion hidrogen yang tertinggi? A 50 cm3 of 1.0 mol dm-3 nitric acid 50 cm3 asid nitrik 1.0 mol dm-3 B 50 cm3 of 2.0 mol dm-3 ethanoic acid 50 cm3 asid etanoik 2.0 mol dm-3 C 40 cm3 of 2.0 mol dm-3 sulphuric acid 40 cm3 asid sulfurik 2.0 mol dm-3 D 30 cm3 of 3.0 mol dm-3 hydrochloric acid 30 cm3 asid hidroklorik 3.0 mol dm-3

70

t1 t2 t3

Temperature Suhu

Time (s) Masa



40. Diagram below shows the position of elements T, W, X, Y and Z in the Periodic Table of elements.

Rajah di bawah menunjukkan kedudukan unsur-unsur T, W, X, Y dan Z dalam Jadual Berkala Unsur. Which of the following pairs of elements react to form a compound that can be use as an electrolyte? Antara pasangan-pasangan unsur berikut, yang manakah bertindak balas untuk membentuk sebatian yang boleh bertindak sebagai elektrolit?

I X and Z III T and Y X dan Z T dan Y

II T and Z IV W and Y T dan Z W dan Y

A. 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

41 The following equation shows the reaction to obtain soluble chloride salt. Persamaan berikut menunjukkan tindak balas untuk mendapatkan garam klorida terlarutkan.

HCl + X Chloride salt + H2O

What is substance X? Apakah bahan X? A Silver oxide Argentum oksida B Lead(II) oxide Plumbum(II) oksida C Mercury oxide Merkuri oksida

D Potassium hydroxide Kalium hidroksida

T W

X

Y

Z



42 Table below shows the melting points and types of particles of four substances.

Jadual di bawah menunjukkan takat lebur dan jenis zarah bagi empat bahan.

Solid substance

Bahan pepejal

Melting point / oC

Takat lebur / oC

Type of particle

Jenis zarah

Electrical conductivity in molten state

Kekonduksian elektrik dalam keadaan leburan

L

80

Molecules Molekul

No Tidak

M 320 Ions Ion

Yes Ya

Q 780 Ions Ion

Yes Ya

R 3000 Atoms Atom

No Tidak

Which of the following substance becomes an electrolyte when it is heated to 350oC? Antara bahan berikut yang manakah menjadi elektrolit apabila dipanaskan sehingga

350oC? A L C Q B M D R 43 The following equation represents a reaction between magnesium metal and sulphuric acid. Persamaan berikut mewakili tindak balas antara logam magnesium dan asid sulfurik. Mg + H2SO4 X + H2

What is the name of the salt X and its solubility? Apakah nama bagi garam X dan keterlarutannya?

Name of salt X Nama garam X

Solubility in water Keterlarutan dalam air

A Magnesium sulphate Magnesium sulfat

Soluble Larut

B Magnesium oxide Magnesium oksida

Insoluble Tidak larut

C Magnesium oxide Magnesium oksida

Soluble Larut

D Magnesium sulphate Magnesium sulfat

Insoluble Tidak larut



44.

Curve P on the graph below obtain from the decomposition of 25 cm3 of 0.2 mol dm-3 hydrogen peroxide solution. Lengkung P dalam graf di bawah didapati daripada penguraian 25 cm3 larutan hidrogen peroksida 0.2 mol dm-3 .

If the experiment is repeated, which of the following solution will produce curve Q? Sekiranya eksperimen itu diulang, larutan yang manakah akan menghasilkan lengkung Q ? A 25 cm3 of 0.25 mol dm-3 hydrogen peroxide

25 cm3 hidrogen peroksida 0.25 mol dm-3

B 20 cm3 of 0.15 mol dm-3 hydrogen peroxide 20 cm3 hidrogen peroksida 0.15 mol dm-3

C 15 cm3 of 0.25 mol dm-3 hydrogen peroxide 15 cm3 hidrogen peroksida 0.25 mol dm-3

D 10 cm3 of 0.25 mol dm-3 hydrogen peroxide 10 cm3 hidrogen peroksida 0.25 mol dm-3

45. Diagram below shows the structural formula of a carbon compound. Rajah di bawah menunjukkan formula struktur bagi satu sebatian karbon.

Which of the following substances are used to produce the above compound? Antara bahan berikut, yang manakah digunakan untuk menghasilkan sebatian di atas?

A Ethanol and propanoic acid Etanol dan asid propanoik B Ethanol and butanoic acid Etanol dan asid butanoik

C Propanol and ethanoic acid Propanol dan asid etanoik

D Butanol and ethanoic acid Butanol dan asid etanoik

P

Q

Time / s Masa /s

Volume of oxygen gas/ cm3

Isipadu gas oksigen / cm3



46. Diagram below shows the set-up of the apparatus for an experiment to determine the rate of the reaction between sodium thiosulphate and sulphuric acid. Rajah di bawah menunjukkan susunan radas eksperimen untuk menentukan kadar tindak balas antara natrium tiosulfat dan asid sulfurik. Which of the following conditions will cause the shortest time taken for the mark ‘X’ disappear from sight? Antara keadaan berikut yang manakah menyebabkan masa yang paling singkat diambil bagi tanda ‘X’ hilang dari pandangan?

Sulphuric acid Asid sulfurik

Sodium thiosulphate solution

Larutan natrium tiosulfat

Temperature/oC

Suhu /oC Volume

Isipadu /cm3

ConcentrationKepekatan /mol dm-3

Volume Isipadu

/cm3

Concentration Kepekatan /mol dm-3

A

B

C

D

10

10

10

10

1.0

1.0

0.5

0.5

50

50

50

50

0.5

0.5

0.5

0.5

30

40

30

40

‘X’ mark Tanda ‘X’

White paper Kertas putih

Sodium thiosulphate solution + sulphuric acid Larutan natrium tiosulfat + asid sulfurik



47. The chemical equation below shows the production of iron in ballast furnace. Persamaan kimia di bawah menunjukkan penghasilan ferum di dalam relau bagas. Fe2O3 + 3CO → 2Fe + 3CO2

Which of the following changes in oxidation number for iron, Fe and carbon, C are correct? Antara berikut, yang manakah perubahan nombor pengoksidaan bagi ferum, Fe dan karbon, C adalah betul?

Iron Ferum

Carbon Karbon

A +2 → 0 0 → +2

B +3 → 0 +2 → +4

C +2 → +3 0 → +2

D +3 → +2 +2 → +4

48. The following equation show the reaction between silver nitrate, AgNO3 and sodium chloride, NaCl. Persamaan berikut menunjukkan tindak balas antara argentum nitrat, AgNO3 dan natrium klorida, NaCl. AgNO3 + NaCl AgCl + NaNO3 H= -65.5kJ mol-1

Which of the following statement explain that the reaction is an exothermic reaction? Antara pernyataan berikut, yang manakah menerangkan bahawa tindak balas itu

merupakan tindak balas eksotermik?

A. Silver chloride precipitate is formed in the reaction Mendakan argentum klorida terbentuk dalam tindak balas

B. The reaction needs 65.5 kJ of heat energy to form 1 mol of silver chloride Tindak balas memerlukan 65.5 kJ tenaga haba untuk membentuk 1 mol argentum klorida

C. The total heat energy absorbed to break the bond is higher than the total heat energy released during formation of bond. Jumlah tenaga haba yang diserap untuk memutuskan ikatan adalah lebih tinggi daripada jumlah tenaga haba yang dibebaskan semasa pembentukan ikatan .

D. The total energy contained in silver nitrate and sodium chloride is higher than the total energy contained in silver chloride and sodium nitrate. Jumlah kandungan tenaga dalam argentum nitrat dan natrium klorida adalah lebih tinggi berbanding jumlah kandungan tenaga dalam argentum klorida dan natrium nitrat.



49. Diagram below shows the apparatus set-up to determine the position of carbon in the reactivity series of metals. Rajah di bawah menunjukkan susunan radas untuk menentukan kedudukan karbon di

dalam siri kereaktifan logam.

Excess carbon powder is mixed thoroughly with the powder oxide of metal P and then heated strongly. The experiment is repeated with oxides of metals Q and R. The following observations are obtained : Serbuk karbon yang berlebihan digaul rata bersama dengan serbuk oksida logam P dan seterusnya dipanaskan dengan kuat. Eksperimen diulang menggunakan oksida logam Q dan oksida logam R. Pemerhatian berikut diperolehi :

Mixture

Campuran Observation Pemerhatian

Carbon + P metal oxide Karbon + oksida logam P

Burns brightly, grey powder is formed Menyala dengan terang ,serbuk kelabu terhasil

Carbon + Q metal oxide Karbon + oksida logam Q

Glows faintly, grey powder is formed Membara dengan malap, serbuk kelabu terhasil

Carbon + R metal oxide Karbon+logam oksida R

No change Tiada perubahan

The arrangement of the metals and carbon in descending order is Susunan logam dan karbon dalam urutan menurun ialah A B C D

P, Q, R, Carbon P, Q, Carbon, R Carbon, R, Q, P R, Carbon, Q, P

Crucible Mangkuk pijar



50. The reaction between hydrochloric acid and sodium hydroxide is an exothermic reaction. The heat of reaction is 57 kJ mol-1. Tindak balas antara asid hidroklorik dan natrium hidroksida adalah tindak balas eksotermik. Haba tindak balas ialah 57 kJ mol-1. Which of the following energy level diagrams represent the reaction? Antara rajah aras tenaga berikut, yang manakah mewakili tindak balas itu?

END OF QUESTION PAPER KERTAS SOALAN TAMAT

A.

Energy tenaga HCl +NaOH

NaCl + H2O

H= + 57kJ mol-1

B.

Energy tenaga HCl +NaOH

NaCl + H2O

H= - 57kJ mol-1

C

H= - 57kJ mol-1

Energy tenaga

NaCl + H2O

HCl +NaOH

D

H= + 57kJ mol-1

Energy tenaga

NaCl + H2O

HCl +NaOH

SULIT

4541/2© Hak Cipta JUJ Pahang 2016 [Lihat halaman sebelah SULIT


ANGKA GILIRAN

SIJIL PELAJARAN MALAYSIA 4541/2 CHEMISTRY Kertas 2

2½ jam Dua jam tiga puluh minit



Kegunaan Pemeriksa

Kod Pemeriksa

Bahagian Soalan Markah Penuh

Markah Diperoleh

A

1 9

2 9

3 10

4 10

5 11

6 11

B 7 20

8 20

C 9 20

10 20

Jumlah 100


1. Tulis nombor kad pengenalan dan angkagiliran anda pada petak yang disediakan.

2. Kertas soalan ini adalah dalam dwibahasa. 3. Soalan dalam bahasa Inggeris mendahului

soalan yang sepadan dalam BahasaMelayu.

4. Calon dibenarkan menjawab keseluruhan

atau sebahagian soalan samaada dalamBahasa Inggeris atau Bahasa Melayu.

5. Calon dikehendaki membaca maklumat di

halaman belakang kertas soalan ini.


4541/2 2 PRAKTISBESTARIJUJ2016


Section A Bahagian A

[60 marks]

[60 markah]

Answer all questions in this section. Jawab semua soalan dalam bahagian ini.

1. (a) Naphthalene is also known as moth ball which is used to get rid of the

cockroaches. After a few hours the moth ball is put into the kitchen cabinet, it is found that the cockroaches did not enter the cabinet because the cabinet had been filled with the moth ball odour. Naftalena juga dikenali sebagai ubat gegat yang digunakan untuk menghalau lipas. Selepas beberapa jam ubat gegat diletakkan dalam kabinet dapur, di dapati lipas tidak memasuki kabinet tersebut kerana kabinet telah dipenuhi dengan bau ubat gegat.

(i) State the name of the process occurs.

Nyatakan nama proses yang berlaku.

................................................................................................................... [1 mark]

[1 markah]

(ii) Explain your answer in (a)(i) by using kinetic theory of matter. Terangkan jawapan anda di (a)(i) dengan menggunakan teori kinetik jirim.

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

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

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

[3 marks] [3 markah]




(b) Diagram 1.1 shows the apparatus set-up of an experiment to determine the melting point of naphthalene and Diagram 1.2 shows the heating curve of solid naphthalene. Rajah 1.1 menunjukkan susunan radas bagi satu eksperimen untuk menentukan takat lebur naftalena dan Rajah 1.2 menunjukkan lengkung pemanasan bagi pepejal naftalena.

Diagram 1.1 Diagram 1.2 Rajah 1.1 Rajah 1.2 (i) Based on Diagram 1.1, why naphthalene is heated using water bath?

Berdasarkan Rajah 1.1, mengapakah naftalena di panaskan dengan menggunakan kukus air?

....................................................................................................................... [1 mark]

[1 markah]

(ii) Show on Diagram 1.2 how to determine the melting point of naphthalene. Tunjukkan di atas Rajah 1.2 bagaimana untuk menentukan takat lebur bagi naftalena.

[1 mark] [1 markah]

(iii) Why the temperature does not change from Q to R? Mengapakah suhu tidak berubah dari Q ke R? ...................................................................................................................

[1 mark] [1 markah]

Termometer Termometer

Naphthalene Naftalena

Heat Panaskan

Water Air

Boiling tube Tabung

didih



(iv) State the changes in the movement of particles from R to S. Nyatakan perubahan pergerakan zarah-zarah daripada R ke S.

................................................................................................................... [1 mark]

[1 markah] (v) Draw the particles arrangement of naphthalene at RS.

Lukis susunan zarah bagi naftalena pada RS.

[1 mark] [1 markah]

2. (a) Diagram 2.1 shows the apparatus set-up for an experiment to determine the

empirical formula oxide of copper. Rajah2.1 menunjukkan susunan radas bagi eksperimen menentukan formula empirik oksida kuprum.

Diagram 2.1

Rajah 2.1

(i) State the type of particles in oxide of copper. Nyatakan jenis zarah yang terdapat di dalam oksida kuprum. …….……………………………………………………………………

[1 mark] [1 markah]

Substance X Bahan X

Heat Panaskan

Hydrogen Hidrogen

Oxide of copper Oksida kuprum



(ii) Substance X is used to dry the hydrogen gas. State the name of substance X. Bahan X digunakan untuk mengeringkan gas hidrogen. Nyatakan nama bagi bahan X.

………………………………………………………………………….

[1 mark] [1 markah]

(iii) Name two substances that can be used to prepare hydrogen gas in this

experiment. Namakan dua bahan yang boleh digunakan untuk menghasilkan gas hidrogen dalam eksperimen ini.

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


(iv) State one precaution that must be taken before heating the oxide of

copper? Nyatakan satu langkah berjaga-jaga yang perlu diambil sebelum pemanasan oksida kuprum? …………………………………………………………………………

[1 mark] [1 markah]

(v) How can you ensure that all the oxide of copper has been completely

reduced? Bagaimanakah anda dapat memastikan bahawa semua oksida kuprum telah diturunkan dengan lengkap?

………………………………………………………………………….

[1 mark] [1 markah]

(vi) The empirical formula of oxide of magnesium cannot be determined

using the apparatus set-up in Diagram 2.1. Give a reason. Formula empirik bagi oksida magnesium tidak dapat ditentukan menggunakan susunan radas di Rajah 2.1. Berikan satu sebab.

………………………………………………………………………….

[1 mark] [1 markah]



(b) Diagram 2.2 shows the structural formula of a molecule. Rajah 2.2 menunjukkan formula struktur bagi satu molekul.

Diagram 2.2 Rajah 2.2

(i) Based on Diagram 2.2, write the empirical formula of the molecule.

Berdasarkan Rajah 2.2, tuliskan formula empirik bagi molekul itu.

………………………………………………………………………

[1 mark] [1 markah]

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

…………………………………………………………………………

…………………………………………………………………………

[1 mark] [1 markah]



3 Diagram 3.1 shows part of the Periodic Table of Elements and Table 3.1 shows one

characteristic of elements P and Q.

The letters P, Q, V, W, X and Y in Diagram 3.1 and Table 3.1 do not represent the

actual symbols of the elements.

Rajah 3.1 menunjukkan sebahagian daripada Jadual Berkala Unsur dan Jadual 3.1

menunjukkan satu ciri bagi unsur P dan Q.

Huruf P, Q, V, W, X dan Y di dalam Rajah 3.1 dan Jadual 3.1 tidak mewakili simbol

sebenar unsur.


Element / Unsur Characteristic / Ciri

P Has 1 valence electron and 3 shells occupied with electron.

Mempunyai 1 elektron valens dan 3 petala berisi electron.

Q Located in Period 3 and formed amphoteric oxide

Terletak di kala 3 dan membentuk oksida amfoterik

Table 3.1 Jadual 3.1

(a) On Diagram 3.1, show the position of P and Q in the Periodic Table of the Element.

Pada Rajah 3.1, tunjukkan kedudukan P dan Q di dalam Jadual Berkala Unsur.


(b) Element Q reacts with oxygen gas to form an amphoteric oxide. What is meant by amphoteric oxide? Unsur Q bertindak balas dengan gas oksigen untuk membentuk oksida amfoterik. Apakah yang dimaksudkan dengan oksida amfoterik?

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

[1 mark] [1 markah]

V W X Y



(c) V atom is more electropositive than X atom. Explain why. Atom V lebih elektropositif daripada atom X. Terangkan mengapa.

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


(d) Element Y is chemically unreactive. State one uses of element Y in daily life.

Unsur Y tidak reaktif secara kimia. Nyatakan satu kegunaan unsur Y dalam

kehidupan harian.

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

[1 mark] [1 markah]

(e) Element P reacts with oxygen gas to form oxide of P. Oxide of P dissolved in water to produce a solution. In Table 3.2 below, mark (√) in the box to show the pH value of the solution. Unsur P bertindak balas dengan gas oksigen untuk membentuk oksida P. Oksida P larut dalam air untuk menghasilkan satu larutan. Dalam Jadual 3.2 di bawah, tandakan (√) di dalam kotak yang disediakan untuk menunjukkan nilai pH bagi larutan yang terhasil.

pH Value Nilai pH

4 7 11

Table 3.2 Jadual 3.2

[1 mark] [1 markah]

(f) X reacts with W to form a covalent compound. X bertindak balas dengan W untuk membentuk satu sebatian kovalen.

(i) State the formula of the compound formed. Nyatakan formula bagi sebatian yang terbentuk.

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

[1 mark] [1 markah]



(ii) Draw the electron arrangement for the compound in (f)(i). Lukiskan susunan elektron bagi sebatian di (f)(i).




4. (a) Diagram 4.1 shows the pH values of hydrochloric acid and ethanoic acid with the same concentration. Rajah 4.1 menunjukkan nilai pH bagi asid hidroklorik dan asid etanoik dengan kepekatan yang sama.

Diagram 4.1

Rajah 4.1 (i) Which of the acid in Diagram 4.1 is a weak acid? Asid yang manakah di dalam Rajah 4.1 adalah asid lemah?.

…………………………………………………………………………………… [1 mark]

[1 markah] (ii) Explain why hydrochloric acid and ethanoic acid with same

concentration has different pH value? Terangkan mengapa asid hidroklorik dan asid etanoik dengan kepekatan yang sama mempunyai nilai pH yang berbeza?

……………………………………………………………………………………

……………………………………………………………………………………

……………………………………………………………………………………


pH meter Meter pH

1.0 5.0



(b) Diagram 4.2 shows the steps in preparing the standard solution of 0.4 mol dm-3

sodium hydroxide, NaOH. Rajah 4.2 menunjukkan langkah-langkah penyediaan larutan piawai natrium

hidroksida, NaOH 0.4 mol dm-3.


(i) What is the meaning of standard solution? Apakah yang dimaksudkan larutan piawai?

…………………………………………………………………………

…………………………………………………………………………

…………………………………………………………………………

[1 mark] [1 markah]

(ii) Why the standard solution of sodium hydroxide is prepared in the

volumetric flask? Mengapakah larutan piawai natrium hidroksida disediakan dalam kelalang volumetrik? …………………………………………………………………………

[1 mark] [1 markah]

Distilled water Air suling Sodium

hydroxside Natrium hidroksida

Volumetric flask Kelalang volumetrik

Step I Langkah I

Step II Langkah II

Step III Langkah III

Step IV Langkah IV



(iii) After all the sodium hydroxide solution in step II is poured into the volumetric flask, the beaker, glass rod and the filter funnel must be rinsed with distilled water and transferred into the volumetric flask. Give a reason.

Selepas semua larutan natrium hidroksida dalam langkah II dituangkan ke dalam kelalang volumetrik, bikar, rod kaca dan corong turas perlu dibilas dengan air suling dan dipindahkan ke dalam kelalang volumetrik. Berikan satu sebab.

…………………………………………………………………………

…………………………………………………………………………

[1 mark] [1 markah]

(iv) Write the formula that represents the relationship between the number

of mole (n), molarity (M) and volume (V) for the solution. Tulis rumus yang mewakili hubungan antara bilangan mol(n), kemolaran(M) dan isipadu (V) bagi larutan itu.

…………………………………………………………………………………… [1 mark]

[1 markah]

(v) Calculate the mass of sodium hydroxide needed to prepare 0.4 mol dm-3

sodium hydroxide solution in 250 cm3 volumetric flask [Given that the relative molecular mass of NaOH = 40 g mol-1]

Hitungkan jisim natrium hidroksida yang diperlukan untuk menyediakan 0.4 mol dm-3 larutan natrium hidroksida di dalam kelalang volumetrik 250 cm3. [Diberi jisim molekul relatif NaOH = 40 g mol-1]




5. Diagram 5 shows the set-up of apparatus for the preparation of iron(II) chloride when excess iron(II) oxide powder is added into hydrochloric acid. Rajah 5 menunjukkan susunan radas bagi penyediaan ferum(II) klorida apabila serbuk ferum(II) oksida berlebihan ditambahkan kepada asid hidroklorik.

Diagram 5 Rajah 5

(a) (i) State the colour of iron(II) chloride solution.

Nyatakan warna larutan ferum(II) klorida.

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

[1 mark] [1 markah]

(ii) State a reason why iron(II) oxide powder is added until excess.

Nyatakan satu sebab mengapa serbuk ferum(II) oksida ditambah sehingga berlebihan.

………………………………………………………………...........……

[1 mark] [1 markah]

(iii) Write the chemical equation between iron(II) oxide and hydrochloric

acid. Tuliskan persamaan kimia bagi ferum(II) oksida dan asid hidroklorik.

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


Salt solution Larutan garam

Crystal of salt Hablur garam

Heat Panaskan

Heat Panaskan

Iron(II) chloride solution Larutan ferum(II) klorida

hydrochloric acid Asid hidroklorik

Iron(II) oxide Ferum(II) oksida

Excess Iron(II) oxide Ferum(II )oksida berlebihan

Iron(II) chloride solution Larutan ferum(II) klorida

Heat Panaskan

Heat Panaskan

Iron(II) chloride crystal Hablur ferum(II) klorida



(iv) Can iron powder replace iron(II) oxide in the experiment? Bolehkah serbuk ferum digunakan untuk menggantikan ferum (II) oksida dalam eksperiment ini?

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

[1 mark] [1 markah]

(b) State a chemical test to verify the present of chloride ion.

Nyatakan ujian kimia untuk menentusahkan kehadiran ion klorida.

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

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

………………………………………………………............................…… [2 marks]

[2 markah]

(c) Iron (II) chloride produced from the experiment react with substance X to form iron(II) carbonate salt. Ferum(II) klorida yang dihasilkan daripada eksperimen itu ditindak balaskan dengan bahan X untuk menghasilkan garam ferum(II) karbonat.

(i) Suggest substance X

Cadangkan bahan X. …………………………………………………………………...............

[1 mark] [1 markah]

(ii) Name the types of reaction involved. Namakan jenis tindak balas yang terlibat. …………………………………………………………………...............

[1 mark] [1 markah]

(iii) Briefly describe how to prepare iron(II) carbonate salt.

Huraikan secara ringkas bagaimana menyediakan garam ferum(II) karbonat. …………………………………………………………………............... …………………………………………………………………............... …………………………………………………………………...............

[2 mark] [2 markah]



6. Diagram 6 shows the conversions of organic compound P to compound Q, compound R and compound S. Rajah 6 menunjukkan penukaran sebatian organik P kepada sebatian Q, sebatian R dan sebatian S.

Diagram 6 Rajah 6

(a) What is the general formula of compound P? Apakah formula am bagi sebatian P? …………………………………………………………………………………

[1 mark] [1 markah]

(b) State the name of compound Q, compound R and compound S Nyatakan nama bagi sebatian Q, sebatian R dan sebation S.

Compound Q :………………………………………………….. Sebatian Q

Compound R : …………………………………………………….. Sebatian R

Compound S : ………………………………………………………….. Sebatian S


Compound P Sebatian P

Compound Q Sebatian Q

Dehydration reaction Tindak balas pendehidratan

Oxidation reaction Tindak balas pengoksidaan Compound R

Sebatian R

Compound S Sebatian S

+ Ethanol Etanol



(c) Compound P undergoes dehydration reaction to form compound Q. Draw a labelled diagram to show how to prepare and collect compound Q from compound P. Sebatian P menjalani tindak balas pendehidratan. Lukiskan rajah berlabel menunjukkan bagaimana menyediakan dan mengumpul sebatian Q daripada sebatian P.


(d) Compound P can undergoes oxidation reaction.

Sebatian P boleh mengalami tindak balas pengoksidaan.

(i) State one suitable oxidising agent for the conversion of compound P to compound R Nyatakan satu agen pengoksidaan yang sesuai bagi penukaran sebatian P kepada sebatian R

…………….……………………………………………………………

[1 mark] [1 markah]

(ii) Write the chemical equation for the oxidation reaction of compound P.

Tuliskan persamaan kimia untuk tindak balas pengoksidaan sebatian P.

……..………………………………..………………………………… [2 marks]

[2 markah]



(e) Compound R reacts with ethanol to form compound S. Sebatian R bertindak balas dengan etanol membentuk sebatian S.

(i) State the functional group of compound S

Nyatakan kumpulan berfungsi bagi sebatian S

………………………………………………………………………… [1 mark]

[1 markah]

(ii) Draw the structural formula of compound S. Lukiskan formula struktur sebatian S.

[1 mark] [1 markah]



Section B Bahagian B

[20 marks]

[20 markah]

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

7(a) Latex is a natural polymer. Diagram 7.1 shows the results for Experiment A

and Experiment B to study the coagulation of latex when it is added with substance X and substance Y. Lateks merupakan polimer semulajadi. Rajah 7.1 menunjukkan keputusan bagi Eksperimen A dan Eksperimen B untuk mengkaji penggumpalan lateks apabila ianya ditambah dengan Bahan X dan Bahan Y.

Experiment A Eksperimen A

Experiment B Eksperimen B

Observation after 30s : Latex coagulate Pemerhatian selepas 30s : Lateks menggumpal

Observation after 30s : Latex does not coagulated Pemerhatian selepas 30s : Lateks tidak menggumpal


Based on the observation in Diagram 7.1 for Experiment A and Experiment B, Berdasarkan pemerhatian dalam Rajah 7.1 bagi Eksperimen A dan Eksperimen B,

(i) name and draw the structural formula for the monomer of natural rubber.

namakan dan lukis formula struktur bagi monomer getah asli. [2 marks]

[2 markah]

(ii) suggest a suitable example of substance X and substance Y. Compare the effect of the substance X and substance Y in the coagulation of latex. cadangkan contoh yang sesuai bagi bahan X dan Bahan Y. Bandingkan kesan bahan X dan bahan Y dalam penggumpalan lateks.


Latex + Substance X lateks + Bahan X

Latex + Substance Y Lateks + Bahan Y




(b) Diagram 7.2 shows the chemical equations to prepare ammonium fertilizer through neutralisation reaction. Rajah 7.2 menunjukkan persamaan kimia untuk menyediakan baja ammonium melalui tindak balas peneutralan .

Experiment I: Ammonia solution + nitric acid → Fertilizer A Experiment I: Larutan ammonia + asid nitrik → Baja A Experiment II : Ammonia solution + sulphuric acid → Fertilizer B Experiment II : Larutan ammonia + asid sulfurik → Baja B


Based on the information in Diagram 7.2, write a balanced chemical equations for Experiment I and Experiment II . State the name of Fertilizer A and Fertilizer B. Berdasarkan maklumat dalam Rajah 7.2 , tuliskan persamaan kimia seimbang bagi Eksperimen I dan Eksperimen II. Nyatakan namakan bagi Baja A dan Baja B.


(c) Diagram 7.3 shows the plant grows well after fertilizer is added. Rajah 7.3 menunjukkan pokok tumbuh dengan lebih subur selepas ditambah dengan

baja.

Diagram 7.3

Rajah 7.3

Between fertilizer A or fertilizer B, which fertilizer is better to increase the fertility of the soil. Explain your answer. [Relative molecular mass of Fertilizer A= 80 ; Fertilizer B =132] Antara baja A dan baja B, pilih baja manakah yang lebih baik untuk meningkatkan kesuburan tanah. Terangkan jawapan anda. [Jisim molekul Relatif bagi Baja A= 80 ; Baja B =132]


Add fertilizer Tambah baja



8. (a) Diagram 8.1 shows the apparatus set-up to determine the heat of neutralisation between sulfurik acid and sodium hydroxide solution.

Rajah 8.1 menunjukkan susunan radas untuk menentukan haba peneutralan antara asid sulfurik dan larutan natrium hidroksida.


Table 8 shows the result of the experiment. Jadual 8 menunjukkan keputusan eksperimen itu.

Description Huraian

Temperature, C Suhu, C

Initial temperature of sulphuric acid Suhu awal asid sulfurik

30.0

Initial temperature of sodium hydroxide solution Suhu awal larutan natrium hidroksida

30.0

Highest temperature of the mixture Suhu tertinggi campuran

36.8

Table 8 Jadual 8

Polystyrene cup

Cawan polistirena

25cm3 of 1.0 mol dm-3 sulphuric acid 25 cm3 asid sulfurik 1.0 mol dm-3

25cm3 of 1.0 mol dm-3 sodium hydroxide 25 cm3 natrium hidroksida 1.0 mol dm-3

Mixture of sulphuric acid and sodium hydroxide

Campuran asid sulfurik dan natrium hidroksida



(i) Write the chemical equation for the reaction. Calculate the heat of neutralization for this experiment. [Specific heat capacity of solution, c = 4.2 J g-1 C,

Density of solution = 1 gcm-3] Tuliskan persamaan kimia bagi tindak balas ini.

Hitungkan haba peneutralan bagi eksperimen ini. [Muatan haba tentu bagi larutan, c= 4.2 J g-1 C, Ketumpatan larutan =1 gcm-3]

[7 marks] [7markah]

(ii) Draw the energy level diagram for this reaction and state three informations that can be deduced from the diagram.

Lukiskan gambar rajah aras tenaga bagi tindak balas ini dan nyatakan tiga maklumat yang boleh dideduksikan daripada rajah itu.

[6 marks] [6markah]

(iii) The experiment is repeated using 25 cm3 of 1.0 mol dm-3 ethanoic acid to

replace the sulphuric acid. The heat of neutralisation using ethanoic acid is - 55.0 kJ mol-1.

Explain why the heat of neutralization for both experiments are different. Eksperimen diulang dengan menggunakan 25cm3 asid etanoik 1.0 mol dm-3

untuk menggantikan asid sulfurik. Haba peneutralan menggunakan asid etanoik ialah - 55.0 kJ mol-1. Terangkan mengapa terdapat perbezaan haba peneutralan bagi kedua-dua eksperimen itu.

[4 marks]

[4 markah]



(b) Diagram 8.2 shows a can of food surrounded by an outer can. Rajah 8.2 menunjukkan tin makanan yang dikelilingi oleh satu lapisan luar tin.


The space between the two cans is filled with water sachet and processed granular limestone. When the spike on the top of the rim of the can pierces the water sachet, the water mix with limestone. The reaction occurs will produce heat to heat up the food.

Ruang di antara kedua-dua tin diisi dengan uncang yang berisi air dan butiran batu kapur yang telah diproses. Apabila penebuk pada penutup tin menembusi uncang yang berisi air, air bercampur dengan batu kapur. Tindak balas yang berlaku akan menghasilkan haba yang boleh memanaskan makanan .

Name the reaction occur and explain why. Namakan tindak balas yang berlaku dan terangkan mengapa.


Spike Penebuk

Water sachet Uncang berisi air

Calcium oxide Kalsium oksida

Tin makanan Food can



Section C

Bahagian C


Answer any one question from this section.

Jawab mana-mana satu soalan daripada bahagian ini


9 (a) Diagram 9.1 shows Wak Shukri’s advertisement board. Wak Shukri is selling

chicken satay and grilled chicken at one of the food courts in Kuantan. Based on the information in the advertisement board, state the factor that affect the

time taken for the chicken satay and grilled chicken to cook. Explain your answer.

Rajah 9.1 menunjukkan papan iklan Wak Shukri. Wak Shukri menjual satay dan ayam panggang di salah sebuah medan selera di Kuantan. Berdasarkan maklumat dalam papan iklan di atas, nyatakan faktor yang mempengaruhi masa yang diambil untuk satay ayam dan ayam panggang siap di masak. Terangkan jawapan anda.





(b) Diagram 9.2 shows the graph volume of gas against time for experiment I and

experiment II to study the affect of one factor on the rate of reaction. Curve I shows the result for the reaction between metal X and acid Y while curve II shows the result for the reaction between metal X, acid Y and copper(II) sulphate solution. Rajah 9.2 menunjukkan graf isipadu gas melawan masa bagi eksperimen I dan eksperimen II untuk mengkaji kesan satu faktor ke atas kadar tindak balas. Lengkung I menunjukkan keputusan bagi tindak balas antara logam X dan asid Y sementara lengkung II menunjukkan keputusan bagi tindak balas antara logam X, asid Y dan larutan kuprum(II) sulfat.


0 10 30 40 50 60 20

V -

Time/s Masa/s

Volume of gas / cm3

Isipadu gas / cm 3

Curve II : Metal X + Acid Y+ CuSO4

Lengkung II : Logam X + Asid Y + CuSO4

I II

Curve I : Metal X + Acid Y

Lengkung I : Logam X + Asid Y



Based on Diagram 9.2, Berdasarkan Rajah 9.2,

(i) if the volume of gas produced is 50cm3, calculate the average rate of

reaction for Experiment I and Experiment II. jika isipadu gas yang terhasil ialah 50cm3, hitung kadar tindak balas purata bagi Eksperimen I dan Eksperimen II.


(ii) Identify the factor that affect rate of reaction in the experiments. By using

collision theory explain why the gradient of curve II is higher compare to curve I. Kenal pasti faktor yang mempengaruhi kadar tindak balas dalam eksperimen itu. Dengan menggunakan teori perlanggaran, terangkan mengapa kecerunan lengkung II lebih tinggi berbanding lengkung I.


(iii) By using one suitable example of metal X and acid Y, describe an

experiment how to obtain curve I and curve II as shown in Diagram 9.2. Include a labelled diagram for the experiment in your answer. Dengan menggunakan satu contoh yang sesuai bagi logam X dan asid Y, huraikan satu eksperimen bagaimana lengkung I dan lengkung II boleh diperoleh seperti yang ditunjukkan dalam Rajah 9.2. Sertakan gambar rajah berlabel bagi eksperimen itu di dalam jawapan anda.

[10 marks]

[10 markah]



10 (a) An experiment is carried out to study the displacement of metal from its salt solution by another metal. Diagram 10.1 shows the result of the experiment.

Satu eksperimen telah dijalankan untuk mengkaji penyesaran logam dari larutan garamnya oleh logam lain. Rajah 10.1 menunjukkan keputusan eksperimen itu.

Diagram 10.1 // Rajah 10.1

(i) Based on observation in Diagram 10.1, explain why the observation in test tube I and test tube II are different. arrange the electropositivity of iron, copper and M in descending order. suggest the name of the brown solid form in test tube I and solution M in test

tube II. Berdasarkan pemerhatian di Rajah 10.1, terangkan mengapa pemerhatian dalam tabung uji I dan tabung uji II

adalah berbeza. susun keelektropositifan ferum, kuprum dan M dalam tertib menurun. cadangkan nama pepejal perang yang terbentuk di dalam tabung uji I dan

larutan M di dalam tabung uji II. [6 marks]

[6 markah]

Exsperiment Eksperimen

Observation Pemerhatian

Test tube I Tabung uji I

Brown solid deposited Blue colour of solution L

became paler Pepejal perang terenap Warna biru larutan L

menjadi semakin pucat

Test tube II Tabung uji II

No change

Tiada perubahan

Solution L Larutan L

Solution M Larutan M



(ii) In another experiment, solution M in test tube II is replace with silver nitrate

solution. Write chemical equation for the redox reaction that occur. Then identify substance oxidised and substance reduced. Dalam satu eksperimen lain, larutan M dalam tabung uji II diganti dengan larutan argentum nitrat. Tuliskan persamaan kimia bagi tindak balas redoks yang berlaku. Kemudian kenal pasti bahan yang dioksidakan dan bahan yang diturunkan.


(b) Diagram 10.2 shows the electrical energy produced by redox reaction can light up

the LED bulb. Rajah 10.2 menunjukkan tenaga elektrik yang dihasilkan dari tindak balas redoks boleh menyalakan mentol LED.


Based on the concept in Diagram 10.2 describe an experiment to show electron transfer at a distance in redox reaction. You are given the apparatus of U tube, galvanometer and connecting wires. In your answer, include a labelled diagram, the name of metal X, metal Y and suitable solution used. Write all the half equation involved in the reaction. Berdasarkan konsep dalam Rajah 10.2, huraikan satu eksperimen untuk menunjukkan pemindahan elektron pada satu jarak dalam tindak balas redoks. Anda dibekalkan dengan radas tiub U, galvanometer dan dawai penyambung. Dalam jawapan anda, sertakan rajah berlabel, nama bagi logam X, logam Y dan larutan-larutan yang sesuai digunakan. Tuliskan semua setengah persamaan yang terlibat di dalam tindak balas itu.


END OF QUESTION PAPER

KERTAS SOALAN TAMAT

Metal Y Logam Y

Metal X Logam X

LED bulb Mentol LED

Lemon




INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON

1. This question paper consists of three sections: Section A, Section B and Section C.

Kertas soalan ini mengandungi tiga bahagian: Bahagian A, Bahagian B danBahagian C. 2. Answer all questions in Section A. Write your answers for Section A in the spaces provided in

the question paper.

Jawabsemua soalan dalam Bahagian A. Tuliskan jawapan bagi Bahagian A dalam ruang yang disediakan dalam kertas soalan

3. Answer one question from Section B and one question from Section C.

Write your answers for Section B and Section C on the `answer sheet’ provided by the invigilators. Answer questions in Section B and Section C in detail. You may use equations, diagrams, tables, graphs and other suitable methods to explain your answer.

Jawab satu soalan daripada Bahagian B dan satu soalan daripada Bahagian C. Tuliskan jawapan bagi Bahagian B dan Bahagian C pada kertas tulis yang dibekalkan oleh pengawas peperiksaan. Jawab Bahagian B dan Bahagian C dengan terperinci. Anda boleh menggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

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

Rajah yang mengiringi soalan tidak dilukiskan mengikut skala kecuali dinyatakan 5. Marks allocated for each question or sub-part of the question is shown in brackets.

Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan dalam kurungan. 6. Show your working. It may help you to get marks.

Tunjukkan kerja mengira.Ini membantu anda mendapatkan markah. 7. If you wish to change your answer, neatly cross out the answer that you have done. Then write

down the new answer.

Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu. 8. You may use a non-programmable scientific calculator.

Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogramkan. 9. You are advised to spend 90 minutes to answer questions inSection A, 30 minutes for Section B

and 30 minutes for Section C.

Anda dicadangkan mengambil masa 90 minit untuk menjawab soalan dalamBahagian A, 30 minit untukBahagian B dan 30 minit untuk BahagianC.

10. Tie together your answer sheets at the end of the examination.

Ikat semua kertas jawapan anda di akhir peperiksaan.

SULIT



ANGKA GILIRAN

SIJIL PELAJARAN MALAYSIA 4541/3

CHEMISTRY Kertas 3 1½ jam Satu jam tiga puluh minit



Untuk Kegunaan Pemeriksa

Soalan Markah Penuh

Markah Diperoleh

1 33

2 17

JUMLAH 50


1. Tulis nombor kad pengenalan dan angka giliran anda pada petak yang disediakan.

2. Kertas soalan ini adalah dalam dwibahasa. 3. Soalan dalam bahasa Inggeris mendahului

soalan yang sepadan dalam bahasa Melayu. 4. Calon dibenarkan menjawab keseluruhan

atau sebahagian soalan sama ada dalam bahasa Inggeris atau Bahasa Melayu.

5. Calon dikehendaki membaca maklumat di

halaman belakang kertas soalan ini.



1. Diagram 1.1 shows the apparatus set-up to carry out an experiment to compare the hardness between bronze and pure copper by using 1.0 kg weight . Rajah 1.1 menunjukkan susunan radas untuk membandingkan kekerasan antara

gangsa dan kuprum tulen, dengan menggunakan pemberat 1.0 kg.


Diagram 1.2 shows the shape of dents formed for the experiment. Rajah 1.2 menunjukkan lekuk yang terbentuk bagi eksperimen itu.

Diagram 1.2

Rajah 1.2

For Examiner’s Only

Kegunaan pemeriksa

sahaja



Table 1.1(a) shows the three dents formed on the copper block. Jadual 1.1 (a) menunjukkan tiga lekuk yang terhasil di atas bongkah kuprum.

Table 1.1(a) Jadual 1.1(a)

Set Set



Table 1.1(b) shows the three dents formed on the bronze block. Jadual 1.1 (b) menunjukkan tiga lekuk yang terhasil di atas bongkah gangsa

Table 1.1(b) Jadual 1.1(b)

Set Set



(a) By using a ruler shows in the diagram, measure the diameter of dents and record the reading in Table 1.1(a) and 1.1(b).

. Dengan menggunakan pembaris yang ditunjukkan dalam rajah itu, ukur diameter lekuk dan catatkan bacaan dalam Jadual 1.1(a) dan 1.1(b).

[3 marks] [3 markah] (b) Construct a table to record the diameters and the average diameters of dents on copper and bronze blocks. Bina satu jadual untuk merekod diameter lekuk dan purata diameter lekuk pada bongkah kuprum dan gangsa. [3 marks] [3 markah] (c ) The average diameter of dents of bronze block is different from the copper block due to the arrangement of particles. Explain why. Purata diameter lekuk blok gangsa adalah berbeza dengan blok kuprum disebabkan oleh susunan zarah-zarah. Terangkan mengapa. [3 marks] [3 markah] ………………………………………………………………………………………………… ………………………………………………………………………………………………… ………………………………………………………………………………………………… (d) State all the variables for the experiment: Nyatakan semua pemboleh ubah bagi eksperimen itu:

(i) The manipulated variable :…………………………………… Pemboleh ubah dimanipulasikan

(ii) The responding variable : …………………………………… Pemboleh ubah bergerak balas

(iii) The constant variable :…………………………………… Pemboleh ubah dimalarkan


1(d)

3

For Examiner’s Only

Kegunaan pemeriksa

sahaja

1(a)

3

1(c)

3

1(b)

3



(e) State the hypothesis for this experiment.

Nyatakan hipotesis untuk eksperimen itu.

……………………………………………………………………………………………

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

[3 markah] (f) (i) State one observation that can be obtained from the experiments. Nyatakan satu pemerhatian yang dapat diperolehi daripada eksperimen itu.

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


(ii) State the inference based on your answer in f(i). Nyatakan inferens berdasarkan jawapan anda di f(i). ………………………………………………………………………………………………. ………………………………………………………………………………………………

(g) State the operational definition for the hardness of block in this experiment. Nyatakan definisi secara operasi bagi kekerasan blok dalam eksperimen ini..

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

[ 3 marks] [3 markah

1(g)

3

1(f)(i)

3

1(f)(ii)

3

1(e)

3

For Examiner’s

Only Kegunaan pemeriksa

sahaja



(h) Predict the diameter of the copper block if the experiment is repeated using 2.0 kg of weight and was dropped on the steel ball bearing. Ramalkan diameter bagi blok kuprum jika eksperimen ini diulangi menggunakan pemberat 2.0kg dan dijatuhkan ke atas bebola keluli. …………………………………………………………………………………..

[ 3 marks] [3 markah] (i) Diagram 1.3 shows a few materials. Rajah 1.3 menunjukkan beberapa bahan.


Classify these materials into metals and alloys by completing the Table 1.3. Kelaskan bahan-bahan itu kepada logam dan aloi dengan melengkapkan Jadual 1.3

Metals Logam

Alloys Aloi

Table 1.3 [ 3 marks] Jadual 1.3 [3 markah (j) What would happen after both iron spoon and steel spoon are put on wet cotton and

left aside for one week? Apakah yang akan berlaku selepas kedua-dua sudu besi dan sudu keluli diletakkan

di atas kapas lembap dan dibiarkan selama satu minggu. …………………………………….……………………………………………… …………………………………….………………………………………………

[ 3 mark] [3 markah]

Steel Tin Chromium Brass Pewter Iron Keluli Timah Kromium Loyang Piuter Besi

1(j)

Total

3

33

1(h)

3

1(i)

3



2 Table 2 shows two glasses of milk are placed in two different places. Rajah 2 menunjukkan dua gelas susu yang diletakkan pada dua tempat yang berbeza.

Diagram 2 Rajah 2

Refering to the Diagram 2, plan a laboratory experiment to investigate the factor that affect the rate of reaction of sodium thiosulphate solution with dilute sulphuric acid.

Merujuk kepada Rajah 2, rancangkan satu eksperimen makmal untuk mengkaji faktor yang mempengaruhi kadar tindak balas larutan natrium tiosulfat dengan asid sulfurik cair.

Your planning should include the following aspects: Perancangan anda hendaklah mengandungi perkara-perkara berikut: (a) Problem statement

Pernyataan masalah

(b) All the variables. Semua pembolehubah

(c) Statement of the hypothesis Pernyataan hipotesis

(d) Lists of materials and apparatus Senarai bahan dan radas

(e) Procedure for the experiment Prosedur eksperimen

(f) Tabulation of data Penjadualan data

[ 17 markah] END OF QUESTION PAPER

KERTAS SOALAN TAMAT

Milk placed at room temperature for 1 day Susu dibiarkan pada suhu bilik selama 1 hari

Milk stored in the refrigerator for 1 day Susu disimpan di dalam peti sejuk selama 1 hari

Observation: Sour smells and foamy Pemerhatian: Berbau masam dan berbuih

Observation : Milk is still in good condition Pemerhatian: Susu masih dalam keadaan baik



MAKLUMAT UNTUK CALON 1. Jawab semua soalan. 2. Jawapan kepada Soalan 1 hendaklah ditulis dalam ruangan yang disediakan dalam

kertas soalan. 3. Jawapan kepada Soalan 2 hendaklah ditulis pada helaian tambahan. Anda boleh

menggunakan persamaan, gambar rajah, jadual, graf dan cara lain yang sesuai untuk menjelaskan jawapan anda.

4. Tunjukkan kerja mengira, ini membantu anda mendapatkan markah. 5. Sekiranya anda hendak membatalkan sesuatu jawapan, buat garisan di atas jawapan itu. 6. Rajah yang mengiringi tidak dilukiskan mengikut skala kecuali dinyatakan. 7. Markah yang diperuntukkan bagi setiap soalan atau ceraian soalan ditunjukkan di dalam

kurungan. 8. Masa yang dicadangkan menjawab Soalan 1 ialah 45 minit dan Soalan 2 ialah 45 minit. 9. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram. 10. Kertas soalan ini hendaklah diserahkan di akhir peperiksaan. Pemberian markah:

Markah Penerangan 3 Cemerlang : Respons yang paling baik 2 Memuaskan: Respons yang sederhana 1 Lemah: Respons yang kurang tepat 0 Tiada respons atau respons salah

INFORMATION FOR CANDIDATES 1. Answer all questions. 2. Write your answer for Question 1 in the spaces provided in the question paper. 3. Write your answers for Question 3 on the extra sheet. You may use equations, diagrams,

tables, graphs and other suitable methods to explain your answer. 4. Show your working, it may help you to get marks. 5. If you wish to cancel any answer, neatly cross out the answer. 6. The diagrams in the questions provided are not drawn to scale unless stated. 7. Marks allocated for each question or part question are shown in brackets. 8. The time suggested to answer Question 1 is 45 minutes and Question 2 is 45 minutes. 9. You may use a non-programmable scientific calculator. 10. This question paper must be handed in at the end of the examination. Marks awarded:

Mark Description 3 Excellent: The best response provided 2 Satisfactory: An average response provided 1 Weak: An inaccurate response provided 0 No response or wrong response provided

4541 1 PRAKTISBESTARIJUJPAHANG2016

MARKING SCHEME PAPER 1 CHEMISTRY

BAHAN PRAKTIS BESTARI JUJ 2016

1 B 11 D 21 C 31 C 41 D

2 A 12 C 22 B 32 C 42 B

3 D 13 C 23 D 33 A 43 A

4 C 14 B 24 D 34 A 44 D

5 C 15 A 25 C 35 B 45 B

6 D 16 A 26 D 36 C 46 B

7 B 17 C 27 B 37 B 47 B

8 A 18 D 28 D 38 B 48 D

9 B 19 D 29 C 39 C 49 D

10 B 20 C 30 C 40 D 50 C



MARKING SCHEME P2 JUJ CHEMISTRY 2016

Question No Mark Scheme

Sub Mark

Mark

1 (a) (i) diffusion 1 1 (ii) 1. Matter is made up of tiny particle

2. The particles move randomly in between air particles 3. From higher concentration region to lower concentration

region

1 1 1

3

(b)

(i) To ensure even heating of naphthalene 1 1

(ii)

1

1

(iii) Heat energy absorbed by particles is used to overcome the forces of attraction between particles

1 1

(iv) Move faster 1 1 (v)

1 1

Total

9

Melting point Takat lebur




Sub Mark

Mark

2 (a) (i) Ion 1 1 (ii) Anhydrous calcium chloride

1 1

(iii) Magnesium / zinc and hydrochloric acid a: any suitable metal and acid

1 +1 2

(iv) Flow the hydrogen gas into the combustion tube for a few minutes before heating

1 1

(v) The heating, cooling and weighing process are repeated until a constant mass is obtained

1 1

(vi) Magnesium is more reactive than hydrogen

1 1

(b) (i) CH2 1 1

(ii) The chemical formula that shows the simplest ratio of atoms of each elements in a substance

1 1

Total

9

9


Sub Mark

Mark

3 (a) Able to write letter P and Q in the correct boxes in the periodic table

1 + 1 2

(b) An oxide which can reacts with both acids and bases to form salts and water

1 1

(c) 1. Size of atom V is larger than atom X // distance between nucleus and valence electron in atom V is further than atom X

2. Forces of attraction between nucleus and valence electron in atom V is weaker. // Atom V is more easier to release electron

** adp atom in pt2

1 1

2

(d) To fill the bulb // inert atmosphere for welding

** any one

1

1

(e) Able to mark √ in the correct box

pH Value

4 7 11

√

1 1

P Q



Sub Mark

Mark

(f) (i) WX4 // CCl4 1 1 (f) (ii) 1. Correct electron arrangement and nucleus is shown

2. Correct labelled and number of atoms

Answer :

1

1

2

Total

10


Sub Mark

Mark

4 (a) (ii) Ethanoic acid 1 1

(iii) 1. Hydrochloric acid is a strong acid and ethanoic acid is a weak acid // HCl ionise completely in water and ethanoic acid ionise partially in water

2. concentration of hydrogen ion in HCl is higher than in ethanoic acid

3. the higher the concentration of hydrogen ion, the lower the pH value

1 1 1

3

4(b) (i) The solution that the concentration is accurately known 1 1

(ii) To get accurate concentration 1 1

(iii) To make sure all NaOH is transferred into the volumetric flask 1 1 (iv) n = MV

1000

1 1

(v) 1. n= 0.4(250) // 0.1 1000 2. mass NaOH = 0.1 x 40 g // 4 g

1

1

2

Total 10

WX

X

X

X



Sub Mark

5(a) (i) Green 1 1 (ii) To ensure hydrochloric acid has reacted completely 1 1

(iii) 1. Correct formulae of reactants and products 2. Balance equation FeO + 2HCl FeCl2 + H2O

1

1

2

(iv) Can 1 1

5 (b) 1. Dilute nitric acid and silver nitrate solution is added into the test tube

2. White precipitate formed

1 1

2

5(c) (i) Sodium carbonate / ammonium carbonate / potassium carbonate 1 1 (ii) Double decomposition reaction // precipitation reaction 1 1

(iii) 1. Add iron(II) chloride solution into solution X. 2. Filter

1

1

2

Total 11

Question Answer Sub mark marks6(a) CnH2n+1OH 1 1 (b) Compound Q : Propene //Propena

Compound R : Propanoic acid //Asid propanoik Compound S : Ethyl propanoate // etil propanoat

1 1 1

3

(c) 1. Functional apparatus 2. Label

1 1

2

(d) (i) Acidified Potassium mangganate (VII) / KMnO4 // Acidified Potassium dichromate (VI) / K2Cr2O7

1 1

(ii)

1. Correct formulae of reactants and products 2. Balance equation

C3H7OH + 2[O] C2H5COOH + H2O

1 1

2

(e) (i) Carboxylate // - COO - 1 1

water

Glass wool

Soaked in

Compound P

Porcelain chip

Heat

Compound Q


H

C

H

O

OHH

H

HH

HHH

CC C

C

(ii)

1 1

TOTAL 11


Sub Mark

Mark

7 (a) (i) 2-methylbut-1,3-diene//isoprene

1 1

2

(ii) 1. Substance X= methanoic acid//formic acid//ethanoic acid//[formula acid]

2. Substance Y = ammonia solution//NH3 3. Positive charged hydrogen ion from acid neutralize the

negative charged of protein membrane 4. Neutral particles collide with each other causes the membrane

to break 5. The rubber polymers are freed/entangled/coagulate 6. Hydroxide, OH- ions neutralised H+ ion produced by bacteria 7. Protein membrane remains negatively charged 8. The rubber polymers cannot coagulate

1 1 1 1 1 1 1 1

8

7 (b) 1. correct formulae of reactants and products 2. balanced equation Experiment I : NH3 + HNO3 NH4NO3 Experiment II : 2NH3 + H2SO4 (NH4)2SO4 3. Fertilizer A : ammonium nitrate

4. Fertilizer B : ammonium sulphate

1+1 1+1

1 1

6

7(c) 1. Fertilizer A 2. % nitrogen in fertilizer A

=28/80 x 100 =35.00%

3. % nitrogen in fertilizer B =28/132 x 100 =21.21%

4. Percentage of nitrogen in fertilizer A is higher than in fertilizer B

1

1

1

1

4

Total

20


Question 8 Rubric

Sub mark

Total mark

8 (a) (i) 1. Change in temperature = 36.8 – 30.0 oC // 6.8 oC 2. Q = mcӨ = [25 + 25] x 4.2 x 6.8 J // 1428 J 3. n = MV / 1000 = 1.0 x 25 // 0.025 1000 4. ∆H = 1428 / 0.025 5. - 57.1 kJ mol-1 6. Correct formula of reactants and products 7. Balanced chemical reaction H2SO4 + 2NaOH → Na2SO4 + 2H2O

1 1 1 1 1 1 1

7

(a) (ii)

1. Arrow upwards, label ‘Energy’ and two levels shown 2. Reactants and products are on the correct level 3. ∆H = -57.1 kJmol-1 is shown 4. The reaction is exothermic // heat release 5. Total energy content of reactants is higher than the product 6. Heat release during bond formation is greater than heat absorbed

during bond breaking

1 1 1 1 1 1

6

(a) (iii) 1. Heat of neutralization using ethanoic acid is lower 2. Sulfuric acid is a strong acid whereas ethanoic asid is a weak

acid 3. Most of the ethanoic acid exist as a molecules 4. Heat energy is absorbed to completely ionizes the ethanoic acid

1 1 1 1

4

Energy

H+ + OH-

H2O

∆H = - 57.1 kJ mol-1



(b) 1. The reaction is exothermic reaction 2. The temperature increase 3. Heat is absorbed by the food

1

1

1 3

TOTAL

20


Sub Mark

Mark

9 (a) 1. size of the chicken meat 2. Total surface area of chicken satay is larger than chicken grilled 3. More heat energy is absorbed by chicken satay compare to

chicken grilled

1 1 1

3 (b) (i) Exp I :

50/60 cm3s-1 // 0.833 cm3s-1

Exp 2 :

50/40 cm3s-1 // 1.25 cm3s-1

1

1 2

(b) (ii) 1. Present of copper (II) sulphate as a catalyst in exp II 2. Catalyst lower the activation energy 3. More colliding particles can overcome the activation energy 4. Frequency of effective collision between X and H+ ions in exp II

higher than exp I 5. Rate of reaction in exp II is higer than exp I

1 1 1 1

1 5 (b) (iii) 1. Metal X : Zinc/ magnesium

2. Acid Y : Nitric acid//hydrochloric acid//sulphuric acid ** pt 1 and pt2 can consider in the procedure 3. Functional diagram 4. labeled diagram

1 1

1 1

Zinc powder

sulphuric acid

asid sulfurik

Hydrogen gas



Sub Mark

Mark

Sample answer for the procedure : 5. Fill a burette with water, invert into a basin with water 6. [20-100]cm3 of [0.5-2.0] moldm-3 nitric acid is poured into a

conical flask. 7. [2-5]g/Excess zinc/ magnesium granules/powder are added into

the acid 8. A stopper with delivery tube is immediately connected to collect

the gas released. 9. Start the stop watch and record the volume of gas collected at

30s intervals. 10. Experiment is repeated by adding copper(II) sulphate.

1 1 1 1 1 1

10

Total

20

Question Answer Sub mark

marks

10 (a)(i) Test tube I Test tube II 1. Reaction occur Reaction does not occur 2. Iron is more

electropositive than L Copper is less electropositive than M

3. Iron can displace L Copper cannot displace M 4. Fe, M, Cu 5. Brown solid : Copper [Reject : Cu] 6. Solution M : zinc nitrate // [any soluble salt in which the metal is

more electropositive than copper]

1 1 1 1 1 1

6

(ii) 1. Correct formulae of reactants and products 2. Balance equation

Cu + 2AgNO3 Cu(NO3)2 + 2Ag

3. Substance oxidise : Copper / Cu 4. Substance reduce : Silver nitrate / AgNO3 / Ag+

1 1 1 1

4

(b) 1. Metal X and metal Y : Copper and zinc // [any suitable pair of metal] 2. Solution used : copper(II) sulphate, zinc sulphate and sulphuric acid

1 1


3. Diagram 4. Pour sulphuric acid into a U tube 5. Slowly and carefully pour zinc sulphate solution into the left arm

of U tube 6. Slowly and carefully pour copper(II) sulphate solution into the

right arm of U tube 7. Dip zinc electrode into zinc sulphate solution and copper

electrode into copper(II) sulphate solution. 8. Connect both electrode to galvanometer to complete the circuit. 9. Cu2+ + 2e Cu 10. Zn Zn2+ + 2e

1 1 1 1 1 1 1 1

10

TOTAL 20

H2SO4

G

Zinc Zink

Zinc sulphate Zink sulfat

Copper(II) sulphate Kuprum(II) sulfat

Copper Kuprum



MARKING SCHEME CHEMISTRY PAPER 3 JUJ 2016 SET 1

Question Rubric Score

1(a)

Able to measure the diameter of dents in 1 decimal point accurately Sample answer:

Copper: 1.3, 1.6, 1.5 Bronze: 1.2, 1.0, 1.2

3

Able to measure the diameter of dents in 2 decimal point // at least 4 diameter of dents correctly

2

Able to state 3 diameter of dents correctly 1

No response or wrong response 0


1(b) Able to construct the table to record the diameters and average of dents on copper and bronze block with correct: 1. titles and units 2. Reading

Sample answer: 3

Type of blocks

Diameter of dents(cm) Average diameter of dents (cm) I II III

Copper 1.3 1.6 1.5 1.47

Bronze 1.2 1.0 1.2 1.13

Able to construct a less accurate table that contain the following: 1. Title without unit 2. reading

2

Able to construct at least 1 title OR reading 1



1(c)

Able to explain the arrangement of particles in the materials correctly [must have comparison]

Sample answer:

Copper Bronze 1. Atomic size of copper atom

are same, 2. Atoms are in closely pack

in orderly manner 3. Layer of atom easily

sliding when force is applied

1.Atomic size of tin/foreign atoms and copper are different 2. The presence of tin/foreign

atoms in bronze disrupts the orderly arrangement of

copper atoms 3. layers of atoms more difficult to slide when force is applied

3

Able to compare 2 points correctly// able to state 3 points on copper/bronze without comparing

2

Able to state point 1 point correctly 1





1(d)

Able to state all the variables Sample answer:

Manipulated variable : Type of materials / blocks

// Copper and bronze

Responding variable : Size / diameter of dents // hardness of

metals/alloy/blocks

Fixed variable : Size / diameter of steel ball bearing // height of the weight // mass of the weight

3

Able to state two variables correctly 2

Able to state one variable correctly 1



1(e)

Able to state the hypothesis correctly Sample answer: Bronze block has smaller size / diameter of dents than copper block

// Bronze is harder than copper

// Copper is less harder than bronze

3

Able to state the hypothesis less correctly If the metal block is hard, the diameter of the dent is smaller // The diameter of the dent is bigger when the copper block is used // the diameter of the dent is smaller when the bronze block is used

2

Able to state idea of hypothesis Different block produces different diameter of the dent

1



1(f)(i)

Able to state the observation correctly Sample answer: 1. Size/diameter of dent formed on copper is bigger/1.47cm/ any reading in 1(b) 2. Size/diameter of dent formed on bronze is smaller/1.13cm/ any reading in 1(b) *** [Any one]

3

Able to state less correctly Sample answer : ‐ diameter of dent formed on copper // diameter of dent formed on bronze

2

Able to state the idea of inference Sample answer : Dent formed

1




1(f)(ii)

Able to state the inference correctly based on answer in (f)(i) Sample answer: 1. Copper is less harder than bronze // arrangement of copper atom are

same size, closely pack and orderly manner //easily sliding when force is applied

2. Bronze is harder than copper // stanum/foreign atoms distrupts the orderly manner of the copper atoms in the bronze.// not easily sliding when force is applied

[Any one]

3

Able to state the inference less correctly Sample answer : The bronze is harder//the hardness of bronze is higher //copper is less harder

2

Able to state the idea of inference Bronze is hard// Copper is soft //the hardness of the blocks is different

1



1(g)

Able to state the operational definition correctly 1. What work is done 2. Observation Sample answer:

The smaller/bigger the size/diameter of dent produced when 1 kg weight is dropped on the block

3

Able to state the operational definition less correctly Sample answer: The dent produced when a weight is dropped on the block // A smaller dent is formed on the bronze block

2

Able to state idea of operational definition The harder block has a smaller dent.

1



1(h)

Able to predict the diameter correctly Sample answer: Diameter/size of copper increase / more than 1.47 cm

3

Able to state the answer less correctly Diameter become larger/bigger

2

Able to state any idea of prediction Increase/more/change

1




1(i)

Able to classify all substances correctly Sample answer:

3

# if reverse score 1

Alloy Pure metal

Steel Brass Pewter

Tin Iron

Chromium

Able to classify at least 4 substances correctly 2

Able to classify at least 2 substances correctly// reverse 1



1(j)

Able to state the answer correctly Sample answer: Iron spoon will corrode/rust while steel spoon remain unchange

3

Able to state the answer less correctly Iron spoon will corrode/rust // steel spoon is not rust /remain unchange

2

Able to state any idea Corrode / rust

1



2(a)

Able to give the problem statement correctly Sample answer : How does the temperature of sodium thiosulphate solution affect the rate of reaction?

3

Able to give the problem statement less correctly Sample answer : How does the temperature of solution affect the rate of reaction?

2

Able to give an idea of statement of the problem Sample answer : To determine the rate of reaction by the temperature of solution

1




2(b)

Able to state all variables correctly

Sample answer : Manipulated variable :The temperature of sodium thiosulphate solution Responding variable : Rate of reaction//The time taken for the ‘X’ mark

to disappear Constant variable : Volume and concentration (sodium thiosulphate) /

(Sulphuric acid) // sodium thiosulphate // acid// size of conical flask

3

Able to state any two variables correctly 2

Able to state any one variable correctly 1



2(c)

Able to state the relationship between the manipulated variable and the responding variable correctly Sample answer : The higher/lower the temperature of sodium thiosulphate solution , the higher/lower the rate of reaction // The higher the temperature the shoter the time taken for ‘X’ marks disappear from side.

3

Able to state the relationship between the manipulated variable and the responding variable incorrectly Sample answer : The rate of reaction increases when the temperature of solution increase

2

Able to state an idea of hypothesis Sample answer : The temperature of reactant affect the rate of reaction

1



Question

Rubric Score

2(d)

Able to give the completely list of the apparatus and materials Answer: Apparatus: conical flask, measuring cylinder, thermometer, stopwatch, white paper/filter paper, wire gauze, tripod stand, Bunsen bunner Material: [0.5 – 1.0] mol dm‐3 sodium thiosulphate solution, [ 0.5‐1.0] mol dm‐3 Sulphuric acid

3

Able to give the list of the apparatus and materials correctly but not completely Answer: Apparatus: conical flask/beaker, thermometer, stopwatch, white paper/filter paper, Bunsen bunner Material: Sodium thiosulphate ,Sulphuric acid

2

Able to give two materials and at least one apparatus Sample answer : Material: Sodium thiosulphate , sulphuric acid [any container]

1



2(e)

Able to state all procedures correctly

Sample answer : 1. Draw an’ X.’ marks on a white paper/filter paper 2. Pour [25‐100] cm3 of [0.5 – 1.0] mol dm‐3 sodium thiosulphate

solution into a conical flask. 3. Record the temperature of solution. 4. Place the conical flask on the’ X.’ marks on a white paper/filter

paper 5. Pour [5 – 10] cm3 of [0.5 – 1.0] mol dm‐3 sulphuric acid solution

and start the stopwatch immediately 6. Swirl the conical flask . 7. Stop the stopwatch when the ‘X’ is disappear from side 8. Record the time taken. 9. Repeat steps 2 to 7 using 35oC, 40oC, 45oC and 50oC temperature

of sodium thiosulphate solution.

3

Able to state four steps of procedures correctly Steps 2, 4, 5, 8

2

Able to state two steps of procedures correctly Steps 2/ 5

1




2(f)

Able to exhibit the tabulation of data that includes the following

information.

1. Headings 2. With unit

Sample answer :

Temperature/ oC Time/s 1/time (s‐1)

30

35

40

45

50

2

Able to tabulate the data incompletely

1. Titles without unit Sample answer :

Temperature Time

1

No response given / wrong response 0

END OF MARKING SCHEME


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