Chemistry Paper 1

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INFORMATION FOR CANDIDATES MAKLUMAT UNTUK CALON 1. This question paper consists of 50 questions. Kertas soalan ini mengandungi 50 soalan. 2. Answer all questions. Jawab semua soalan. 3. Answer each question by blackening the correct space on the answer sheet. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan. 4. Blacken only one space for each question. Hitamkan satu ruangan sahaja bagi setiap soalan. 5. If you wish to change your answer, erase the blackened mark that you have made. Then blacken the space for the new answer. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian hitamkan jawapan yang baru. 6. The diagrams in the questions provided are not drawn to scale unless stated. Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan. 7. You may use a non-programmable scientific calculator. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh diprogram.

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Carbon Oxygen Water Chlorine

Which of the following acids is a weak acid? Antara asid berikut, yang manakah merupakan asid lemah? A B C D

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Which of the following substances exists as atoms? Antara bahan berikut, yang manakah wujud sebagai atom? A B C D

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Hydrochloric acid Ethanoic acid Sulphuric acid Nitric acid

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

A

B

C

D

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B C D

B C

D

Conducts electricity in liquid state Mengkonduksi elektrik dalam keadaan cecair Dissolves in organic solvents Larut dalam pelarut organik Requires a great amount of heat to break the attractive forces between molecules Memerlukan haba yang banyak untuk memutuskan daya tarikan antara molekul Solid covalent compounds consist of particles which are scattered randomly Sebatian kovalen pepejal mengandungi zarah-zarah yang bertabur secara rawak

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

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Becomes purple gas when heated Menjadi gas ungu apabila dipanaskan More electronegative than bromine Lebih elektronegatif daripada bromin Exists as yellow liquid at room conditions Wujud sebagai cecair kuning pada keadaan bilik Dissolves in water to form an alkaline solution Larut dalam air membentuk larutan beralkali

Which of the following is a property of covalent compound? Antara berikut, yang manakah sifat sebatian kovalen? A

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Which of the following is a property of iodine? Antara berikut, yang manakah sifat iodin? A

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Accepts an electron Menerima satu elektron Releases an electron Membebas satu elektron Accepts two electrons Menerima dua elektron Shares a pair of electrons Berkongsi sepasang elektron

Which of the folllowing is an electrolyte? Antara berikut, yang manakah elektrolit? A B C D

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Glucose Copper Naphthalene Sodium chloride

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Diagram 1 shows the set-up of apparatus of a chemical cell. Rajah 1 menunjukkan susunan radas bagi sel kimia.

Diagram 1 Which of the following substances is most likely to be Y? Antara bahan berikut, yang manakah mungkin Y? A B C D 9

Iron Magnesium Silver Copper

Diagram 2 shows the set-up of apparatus used to investigate diffusion in a solid. Rajah 2 menunjukkan susunan radas untuk menyiasat resapan dalam pepejal.

Diagram 2 After a few days, the colourless solid gel turned blue. What can we deduce from the above investigation? Selepas beberapa hari, pepejal gel tanpa warna bertukar ke biru. Apakah yang dapat disimpulkan daripada penyiasatan di atas? A B C D

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Copper(II) sulphate dissolves in the gel Kuprum(II) sulfat larut dalam gel Copper(II) sulphate is less dense than the gel Kuprum(II) sulfat kurang tumpat daripada gel Copper(II) sulphate reacts with the gel to produce blue colour Kuprum(II) sulfat bertindak balas dengan gel menghasilkan warna biru Copper(II) sulphate particles diffuse through spaces between the gel particles Zarah-zarah kuprum(II) sulfat meresap melalui ruang di antara zarahzarah gel

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Which of the following statements is true about an acid? Antara pernyataan berikut, yang manakah benar tentang asid? A B C D

Turns red litmus blue Has a pH of more than 7 Reacts with metal oxide to produce salt and water 1 mole of acid produces 1 mole of hydrogen ions when dissolves in water

11 The following equation shows a reaction to produce hydrogen gas. Persamaan berikut menunjukkan tindak balas untuk menghasilkan gas hidrogen. 2HCl + Mg → MgCl2 + H2 Which of the following statements will increase the rate of production of hydrogen gas ? Antara pernyataan berikut, yang manakah akan meningkatkan kadar penghasilan gas hidrogen? A B C D

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What is the function of vanadium(V) oxide in the manufacturing of sulphuric acid? Apakah fungsi vanadium(V) oksida dalam pembuatan asid sulfurik? A B C D

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Increase the time of reaction Memanjangkan masa tindak balas Increase the volume of acid Menambahkan isipadu asid Increase the size of granulated magnesium Menambahkan saiz butir magnesium Increase the temperature of the mixture Meningkatkan suhu campuran

To speed up the formation of oleum Mempercepatkan penghasilan oleum To increase the yield of sulphur trioxide Menambahkan hasil sulfur trioksida To increase the rate of production of sulphur trioxide Meningkatkan kadar penghasilan sulfur trioksida To increase the rate of burning of sulphur in air Meningkatkan kadar pembakaran sulfur dalam udara

Which of the following is a synthetic polymer ? Antara berikut, yang manakah polimer sintetik? A B C D

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Polypropene Polysaccharide Polyisoprene Silk

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Which of the following salt can be prepared by double decomposition reaction? Antara garam berikut, yang manakah boleh disediakan melalui tindak balas penguraian ganda dua? A B C D

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Sodium nitrate Potassium carbonate Calcium sulphate Magnesium chloride

Figure 3 shows the structural formula of a carbon compound. Rajah 3 menunjukkan formula struktur satu sebatian karbon. H H O H | | || | H − C − C − C − O −C − H | | | H H H

Figure 3

Based on the figure above, what is the general formula of the compound? Berdasarkan rajah di atas, apakah formula am bagi sebatian tersebut? A B C D

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Which of the following pairs of compounds are in the same homologous series? Manakah antara pasangan sebatian berikut berada dalam siri homolog yang sama? A B C D

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CnH2nCOOH CnH2n+1COOH CH2n+1 COO CmH2m+1 CnH2n+1COO CmH2m+1

Compound 1 C2H4 C2H6 C2H5OH C2H5OH

Compound 2 C3H6 C3H6 CH3CO2H C2H5COOH

Which of the following medicines is used to cure illnesses caused by bacteria ? Antara ubat berikut, yang manakah digunakan untuk menyembuh penyakit disebabkan bakteria? A B C D

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Paracetamol Streptomycin Antiseptic Aspirin

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B C D

20.

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The heat of neutralisation between hydrochloric acid and potassium hydroxide is higher than the heat of neutralisation between ethanoic acid and potassium hydroxide because Haba peneutralan antara asid hidroklorik dan kalium hidroksida adalah lebih tinggi daripada haba peneutralan antara asid etanoik dan kalium hidroksida kerana A

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hydrochloric acid is a mineral acid whereas ethanoic acid is an organic acid asid hidroklorik adalah asid mineral sementara asid etanoik adalah asid organik the reaction between ethanoic acid and potassium hydroxide is incomplete tindak balas antara asid etanoik dan kalium hidroksida adalah tidak lengkap hydrochloric acid and ethanoic acid have different pH values asid hidroklorik dan asid etanoik mempunyai nilai pH yang berlainan energy is needed to ionise the ethanoic acid tenaga diperlukan untuk mengion asid etanoik

Soap cannot function properly as cleansing agent in water that contains Sabun tidak dapat berfungsi dengan baik sebagai agen pencuci dalam air yang mengandungi I II III IV

potassium ion, K+ magnesium ion, Mg2+ calcium ion, Ca2+ hydroxide ion, OH –

A B C D

I and II only II and III only I and III only III and IV only

Aspirin is a medicine for headache, but it can also cause stomachache. Why? Aspirin ialah ubat untuk sakit kepala, tetapi ia juga boleh mengakibatkan sakit perut. Mengapa? A B C D

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Aspirin contains acid Aspirin mengandungi acid Aspirin contains poisonous substances Aspirin mengandungi bahan beracun Aspirin can react with gastric juice to produce acid Aspirin akan bertindak balas dengan jus gastrik menghasilkan asid) Aspirin can react with food to produce poisonous products Aspirin akan bertindak balas dengan makanan menghasilkan bahan beracun

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Diagram 4 shows the heating curve of solid naphthalene. Rajah 4 menunjukkan kelok pemanasan pepejal naftalena.

Diagram 4

Which of the following statements is true about the particles of naphthalene at T oC? Antara pernyataan berikut, yang manakah benar mengenai zarah-zarah naftalena pada T oC? I II III IV A B C D

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The particles can only vibrate and rotate at fixed positions at t1 Zarah-zarah hanya bergetar dan berputar di kedudukan yang tetap pada t1 Both solid and liquid are present between t1 and t2 Kedua-dua pepejal dan cecair wujud antara t1 dan t2 The forces of attraction between particles are overcome Daya tarikan antara zarah-zarah diatasi The particles absorb heat energy Zarah-zarah menyerap tenaga haba I and III only II and IV only I, II and III only I, II, III and IV

23 Na The symbol of sodium atom is 11 The nucleus of this atom contains 23 Na Simbol atom natrium adalah 11 Nukleus atom ini mengandungi

A B C D

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11 protons and 12 neutrons 11 neutrons and 12 protons 11 protons and 12 electrons 12 neutrons and 11 electrons

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Diagram 5 shows an apparatus set-up for a chemical cell prepared by a student. Rajah 5 menunjukkan susunan radas bagi sel kimia yang disediakan oleh seorang pelajar.

Diagram 5 The student wants to modify the chemical cell so that it produces a higher voltage. What modification should the student make? Pelajar tersebut ingin mengubahsuai sel kimia itu supaya voltan yang dihasilkan adalah lebih tinggi. Apakah pengubahsuaian yang perlu dilakukan oleh pelajar tersebut? A B C D

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Use a wider metal plates Gunakan kepingan logam yang lebih lebar Substitute zinc with magnesium Gantikan zink dengan magnesium Reduce the distance between the two metal plates Kurangkan jarak antara dua kepingan logam Use magnesium sulphate solution as the electrolyte Gunakan larutan magnesium sulfat sebagai elektrolit

Figure 6 shows four elements in the Periodic Table of Elements. Which of the element can form coloured compound? Rajah 6 menunjukkan empat unsur dalam Jadual Berkala Unsur. Unsur yang manakah boleh membentuk sebatian berwarna?

Figure 6

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Which of the following substances is used as catalyst in Haber Process ? Antara bahan berikut, yang manakah digunakan sebagai mangkin dalam Proses Haber? A B C D

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Iron Nickel Platinum Vanadium(V) oxide [Lihat sebelah SULIT

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The information below shows three characteristics of a compound P. Maklumat berikut mununjukkan tiga ciri bagi sebatian P. • • •

Soluble in water High melting and boiling points Does not conduct electricity in the solid state

What is P? A B C D 27

Zinc Sulphur Silver chloride Sodium nitrate

Diagram 7 shows the set-up of the apparatus of an electrolytic cell. Rajah 7 menunjukkan susunan radas bagi satu sel elektrolisis.

Diagram 7 Which of the following half-equations represents the reaction that occurred at electrode P? Antara persamaan setengah berikut, yang manakah mewakili tindak balas yang berlaku di elektrod P? A B C D

Na+ + e Na 2H+ + 2e H2 2Cl Cl2 + 2e 4OHO2 + 2H2O +

4e

28 What is the oxidation number of sulphur in K2S2O 8? Apakah nombor pengoksidaan sulfur dalam K2S2O 8? A B C D

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-2 0 +7 +8

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A precipitate is formed when hydrochloric acid is added to solution X. Which of the following solutions is most probably solution X? Mendakan terbentuk apabila asid hidroklorik ditambah kepada larutan X. Antara larutan berikut, yang manakah mungkin larutan X? A B C D

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Zinc nitrate Silver nitrate Calcium nitrate Magnesium nitrate

Figure 8 shows the electron arrangement of an atom of element X Gambarajah 8 menunjukkan susunan elektron bagi atom unsur X.

Figure 8 The atom of element X can form a covalent bond with another atom through Atom unsur X membentuk ikatan kovalen dengan atom lain melalui A B C D

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acceptance of two electrons penerimaan dua elektron donation of two electrons menderma dua elektron sharing of two pairs of electrons perkongsian dua pasang elektron elimination of three pairs of electrons penyingkiran tiga pasang elektron

Potassium and sodium are in the same group in the Periodic Table. Which of the following statements is true about potassium? Kalium dan natrium adalah dalam kumpulan yang sama dalam Jadual Berkala. Antara pernyataan berikut, yang manakah benar mengenai kalium? A B C D

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Potassium reacts more vigorously with water compared to sodium Kalium bertindak balas lebih cergas dengan air berbanding natrium Potassium has a higher density compared to sodium Kalium mempunyai ketumpatan yang lebih tinggi berbanding natrium The melting point of potassium is higher than that of sodium Takat lebur kalium lebih tinggi daripada natrium Potassium is less electropositive than sodium Kalium kurang elektropositif berbanding natrium

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Figure 9 shows an ester produced when an alcohol reacts with a carboxylic acid. Gambarajah 9 menunjukkan sejenis ester yang terhasil apabila sejenis alkohol bertindak balas dengan sejenis asid karboksilik. O II CH3 − CH2 − C − O − CH2 − CH2 − CH3 Figure 9 Which of the substances are used in the reaction? Manakah antara sebatian berikut digunakan dalam tindak balas tersebut? Carboxylic acid

Alcohol

A

CH3CH2OH

B

CH3CH2CH2OH

CH3CH2CH2CHOH C

D

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CH3CH2CH2OH

Iron(III) ion, Fe3+ in solution can be converted into iron(II) ion, Fe2+ by adding zinc powder. Which of the following can replace zinc powder in the reaction? Larutan yang mengandungi ion ferum(III), Fe3+ boleh ditukarkan ke ion ferum(II), Fe2+ dengan menambahkan serbuk zink. Antara berikut yang manakah boleh menggantikan serbuk zink di dalam tindak balas ini? A B C D

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Bromine water Potassium iodide solution Potassium hexacyanoferrate(II) solution Acidified potassium manganate(VII) solution

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SULIT 4541/1 14 34 Figure 10 shows the graph of total volume of carbon dioxide against time for the reaction of a metal carbonate with dilute acid for experiment P and experiment Q. Rajah 10 menunjukkan graf bagi jumlah isipadu karbon dioksida melawan masa bagi tindak balas karbonat logam dengan asid cair bagi eksperimen P dan eksperimen Q.

Figure 10 Which of the following explains the differences between both curves from the experiments? Antara berikut, yang manakah menerangkan perbezaan antara dua lengkuk bagi eksperimen tersebut? I II III

IV

A B C D

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Temperature of acid in experiment P is higher than in experiment Q Suhu asid dalam eksperimen P lebih tinggi daripada dalam eksperimen Q Catalyst is used in experiment P but not in experiment Q Mangkin digunakan dalam eksperimen P tetapi tidak dalam eksperimen Q Quantities of metal carbonate and acid used in experiment P are more than that in experiment Q Kuantiti karbonat logam dan asid dalam eksperimen P melebihi dalam eksperimen Q Small particle size of metal carbonate is used in experiment P and big particle size of metal carbonate is used in experiment Q Saiz zarah karbonat logam yang kecil digunakan dalam eksperimen P dan saiz zarah karbonat logam yang besar digunakan dalam eksperimen Q III and IV only I , II and III only I, II and IV only I, II , III and IV

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Figure 11 shows the energy level diagram that represents the reaction between A and B. Rajah 11 menunjukkan gambar rajah aras tenaga mewakili tindak balas antara A dan B.

Figure 11 What is the heat of the reaction between A and B? Apakah haba tindak balas antara A dan B? A B C D 36

Element J and element Q have proton numbers of 11 and 8 respectively. What is the relative molecular mass of compound formed between J and Q? Unsur J dan unsur Q masing-masing mempunyai nombor proton 11 dan 8. Berapakah jisim molekul relatif sebatian yang terbentuk antara J dan Q? [Relative atomic mass : J = 23 ; Q = 16] A B C D

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T2 T2 – T1 T3 - T1 T3 – T2

39 55 62 78

1.72 g of an oxide of metal X contains 0.8 g oxygen. What is the empirical formula of the oxide? 1.72 g oksida logam X mengandungi 0.8 g oksigen. Apakah formula empirik bagi oksida itu? [Relative atomic mass : X = 46 ; O = 16] A B C D

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XO2 X2O X2O3 X2O5

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2.10 g of element Q combined with 0.80 g of element R to produce a compound with formula Q3R4. What is the relative atomic mass of element Q? 2.10 g unsur Q berpadu dengan 0.80 g unsur R untuk menghasilkan sebatian dengan formula Q3R4. Berapakah jisim atom relatif unsur Q? [Relative atomic mass : R = 16] A B C D

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114 116 118 132

A beaker contains 100 cm3 of 0.5 mol dm-3 sodium hydroxide solution. Calculate the number of moles of sodium hydroxide in the beaker. Sebuah bikar mengandungi 100 cm3 larutan natrium hidroksida 0.5 mol dm-3. Hitung bilangan mol bagi natrium hidroksida dalam bikar. A B C D

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14 42 56 58

What is the relative molecular mass of ammonium sulphate, (NH4)2SO4? Apakah jisim molekul relatif bagi ammonium sulfat, (NH4)2SO4? [Relative atomic mass: H = 1, N = 14, O = 16, S = 32] A B C D

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0.05 0.50 5.00 50.0

The following equation represents the reaction between hydrochloric acid and sodium hydroxide. Berikut ialah persamaan yang mewakili tindak balas antara asid hidroklorik dan natrium hidroksida. NaOH + HCl

NaCl + H2O

What is the mass of sodium chloride formed when 100 cm3 of 0.5 mol dm-3 hydrochloric acid reacts with excess sodium hydroxide solution? Apakah jisim natrium klorida yang terbentuk apabila 100 cm3 asid hidroklorik 0.5 mol dm-3 bertindak balas dengan larutan natrium hidroksida berlebihan? [Relative atomic mass: Na = 23, Cl = 35.5] A B C D 4541/1

50.0 g 5.85 g 2.93 g 3.55 g [Lihat sebelah SULIT

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Which of the following shows the wrong combination of properties for alloy and its pure metal? Antara berikut manakah menunjukkan padanan tentang sifat aloi dan logam tulennya yang salah? A B C D

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Alloy hard stronger ductile resistance to corrosion

Pure metal harder strong less ductile less resistance to corrosion

Figure 12 shows the graph of total volume of oxygen gas released against time for the decomposition of hydrogen peroxide. Rajah 12 menunjukkan graf bagi jumlah isipadu gas oksigen yang terbebas melawan masa untuk penguraian hidrogen peroksida.

Figure 12 Which of the following is the inference from the graph? Manakah yang berikut adalah inferens daripada graf ? I II III IV A B C D

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Rate of gas released at t2 is zero Kadar pembebasan gas pada t2 adalah sifar The average rate of gas released in duration t1 is V/t1 cm3 min-1 Purata kadar pembebasan gas dalam tempoh t1 ialah V/t1 cm3 min-1 Rate of gas released at the initial reaction is highest Kadar pembebasan gas pada permulaan tindak balas adalah paling tinggi Decomposition of hydrogen peroxide decreases with time Penguraian hidrogen peroksida berkurangan dengan masa. I , II and III only I, III and IV only II, III and IV only I,II ,III and IV

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Graph 1 in Figure 13 is obtained from the reaction between 5 g of large marble chips and 100 cm3 1.0 mol dm-3 of hydrochloric acid. Graf I dalam Rajah 13 dihasilkan daripada tindak balas antara 5 g ketulan marmar dan 100 cm3 1.0 mol dm-3 asid hidroklorik.

Figure 13 Which of the following reaction will produce graph 2? Manakah antara tindak balas berikut akan menghasilkan graf 2? A B C D

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5 g large marble chips added to 100 cm3 1.0 mol dm-3 hydrochloric acid 5 g ketulan marmar ditambah kepada 100 cm3 1.0 mol dm-3 asid hidroklorik 5 g crushed marble chips added to 100 cm3 1.0 mol dm-3 hydrochloric acid 5 g serbuk marmar ditambah kepada 100 cm3 1.0 mol dm-3 asid hidroklorik 5 g large marble chips added to 50 cm3 1.0 mol dm-3 hydrochloric acid 5 g ketulan marmar ditambah kepada 50 cm3 1.0 mol dm-3 asid hidroklorik 5 g crushed marble chips added to 50 cm3 1.0 mol dm-3 hydrochloric acid 5 g serbuk marmar ditambah kepada 50 cm3 1.0 mol dm-3 asid hidroklorik

Compound P undergoes combustion in excess of oxygen to produce carbon dioxide and water. The equation for the reaction is as follows: Sebatian P mengalami pembakaran dalam oksigen berlebihan untuk menghasilkan karbon dioksida dan air. Persamaan tindakbalas adalah seperti berikut: P

+

3O2

2CO2

+

3H2O

What is compound P? Apakah sebatian P? A B C D

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C2H4 C2H6 C2H5OH C3H7OH

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W is located between magnesium and iron in the reactivity series of metals. Which oxide cannot be reduced by W? W terletak di antara magnesium dan besi dalam siri kereaktifan logam. Oksida manakah tidak boleh diturunkan oleh W ? A B C D

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Calcium oxide Silver oxide Tin(II) oxide Copper(II) oxide

Which of the following modern medicines is correctly matched? Antara ubat moden berikut, yang mana satu dipadankan dengan betul? I. II. III. IV

Type of modern medicine Hormone Antibiotic Analgesic Psychoterapeutic medicine

A B C D

I and III only III and IV only I, II and III only IV only

Example insulin paracetamol codeine streptomycin

Figure 14 shows the energy level diagram for a reaction between zinc and copper(II) sulphate solution. Rajah 14 menunjukkan gambar rajah aras tenaga bagi tindak balas antara zink dan larutan kuprum(II) sulfat.

Figure 14 Calculate the temperature change when excess zinc is added to 100 cm3 of 0.1 mol dm–3 copper(II) sulphate solution . Kira perubahan suhu apabila zink berlebihan ditambah kepada 100 cm3 larutan kuprum(II) sulfat 0.1mol dm –3. [Specific heat capacity of water = 4.2 J g-1 oC-1] A B C D

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2oC 4oC 6oC 8oC

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SULIT 20 49 The following is a thermochemical equation. Berikut ialah suatu persamaan termokimia. HCl + NaOH

NaCl + H2O

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∆H = -57 kJ/mol

Calculate the quantity of heat energy released when 200 cm3 2.0 mol dm-3 hydrochloric acid is added to 300 cm3 2.0 mol dm-3 sodium hydroxide solution. Hitung kuantiti haba yang dibebaskan apabila 200 cm3 2.0 mol dm-3 asid hidroklorik ditambah kepada 300 cm3 2.0 mol dm-3 larutan natrium hidroksida. A B C D 50

5.70 kJ 11.4 kJ 17.1 kJ 22.8 kJ

Figure 15 shows the results of an experiment to investigate the effect of other metals on the rusting of iron. Gambarajah 15 menunjukkan keputusan satu eksperimen untuk mengkaji kesan logam lain ke atas pengaratan besi. Test tube

Procedure

Result after 3 days

Iron nail did not rust P

Iron nail in contact with coil of metal X

Q

Iron nail rusted Iron nail in contact with coil of metal Y

Figure 15 Based on the above result, arrange iron, X and Y in order of increasing electropositivity. Berdasarkan keputusan di atas, susun besi, X dan Y mengikut turutan menaik keelektropositifannya. A B C D

X, iron, Y Y, iron, X Iron, X, Y Iron, Y, X END OF QUESTION PAPER

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