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Published by Penerbit Ilmu Bakti, 2021-04-19 00:04:11

Firasat SPM Chemistry

Firasat SPM Chemistry

FIRASAT

SPM
KERTAS MODEL SPM
PENERBIT
ILMU
BAKTI SDN. BHD.
Chemistry
Bilingual

(4541/1 & 4541/2)

HOTS Actual SPM-style LATEST
Questions
SPM

FORMAT

2021

• Suriati binti A. Rashid • Reena Sethu (Guru Cemerlang)

SULIT Kertas Model 1

1Kertas Model

2 2sijilKpeerltaajsarMaondmeal laysia 202K1ertas Model

chemistry 34541/1
Kertas 1
Kertas Model
Satu jam lima belas minit
PENERBIT11Kertas Model 3
ILMU4
BAKTI SDN. BHD.jam

JANGAN BUKA KERTAS PEPERIKSAAN INI SEHINGGA DIBERITAHU

Kertas Model 4 Kertas Model 4INFORMATION FOR CANDIDATES

MAKLUMAT UNTUK CALON

1. This exam paper consists of 40 questions. Kertas Model 5
Kertas peperiksaan ini mengandungi 40 soalan.

Kertas Model 52. Answer all questions.

Jawab semua soalan.

3. Each question is followed by four options. Choose the best option for each question.
Tiap-tiap soalan diikuti oleh empat pilihan jawapan. Pilih satu jawapan yang terbaik bagi

setiap soalan.

4. If you wish to change your answer, erase the blackened mark that you have made. Then

Kertas Model 6 Kertas Model 6blacken the space for the new answer.

Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat. Kemudian
hitamkan jawapan yang baharu.

5. The diagrams in the questions provided are not drawn to scale unless stated. 7

Kertas Model 7 Kertas Model Rajah yang mengiringi soalan tidak dilukis mengikut skala kecuali dinyatakan.

6. You may use a scientific calculator.
Anda dibenarkan menggunakan kalkulator saintifik.

8Kertas Model Kertas Model 8

Kertas peperiksaan ini mengandungi 8 halaman bercetak.

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–1 [Lihat halaman sebelah

SULIT

SULIT 4541/1

 1 Which of the following substances exists as  4 The nucleon number of element P is 40 and P2+ ion
molecules? has 18 electrons.
Antara bahan berikut, yang manakah wujud sebagai What is the number of neutrons of P2+
molekul? ion? HOTS Analysing
A Iron Nombor nukleon unsur P ialah 40 dan ion P2+ mempunyai
Ferum 18 elektron.
B Helium Berapakah bilangan neutron bagi ion P2+?
Helium A 18
C Silver chloride B 20
Argentum klorida C 22
D Carbon dioxide D 40
Karbon dioksida
 5 Which of the following statements is true for one
mole of a substance?
Antara pernyataan berikut, yang manakah benar bagi
satu mol bahan?
A 1 mole of zinc contains 6.02 × 1023 molecules
1 mol zink mengandungi 6.02 × 1023 molekul
B 1 mole of oxygen gas contains 6.02 × 1023 atoms
1 mol gas oksigen mengandungi 6.02 × 1023 atom
C 1 mole of water contains the same number of
atoms as in 12 g of carbon-12
1 mol air mengandungi bilangan atom yang sama
dengan 12 g karbon-12
D 1 mole of carbon dioxide contains the same
number of molecules as the number of atoms in
12 g of carbon-12
1 mol karbon dioksida mengandungi bilangan molekul
yang sama dengan bilangan atom dalam 12 g karbon-12

 6 Diagram 1 shows a cooking gas cylinder.
Rajah 1 menunjukkan sebuah silinder gas memasak.
PENERBIT 2 Table 1 shows the number of electrons, protons
ILMUand neutrons for particles X and Y.
BAKTI SDN. BHD.Jadual 1 menunjukkan bilangan elektron, proton dan
neutron bagi zarah X dan Y.

Particle Number of Number of Number of
Zarah
electrons protons neutrons
Bilangan Bilangan Bilangan
elektron proton neutron

X 10 10 11

y 10 10 14 Diagram 1
Rajah 1
Table 1
Jadual 1 How many hydrogen atoms are contained in the
cylinder?
Which of the following statements is true for X and Berapakah bilangan atom hidrogen yang terdapat dalam
Y? silinder itu?
Antara pernyataan berikut, yang manakah benar bagi A 2 × 10 × 6.02 × 1023
X dan Y? B 2 × 8 × 6.02 × 1023
A X is a positive ion C 2 × 2 × 6.02 × 1023
X ialah ion positif D 2 × 6.02 × 1023
B X and Y are isotopes
X dan Y merupakan isotop
C Both X and Y are charged particles
Kedua-dua X dan Y merupakan zarah bercas
D Both X and Y have the same nucleon number
Kedua-dua X dan Y mempunyai nombor nukleon

yang sama

 3 Siti is a food technologist. She wants to destroy  7 The reaction between magnesium and iron(III)
bacteria that cause potatoes to rot by using oxide produces iron and substance T. What is the
radioisotope. chemical formula for substance T?
Which of the following is suitable to be used for Tindak balas antara magnesium dan ferum(III) oksida
this purpose?
Siti ialah ahli teknologi makanan. Dia ingin menghasilkan ferum dan sebatian T.
memusnahkan bakteria yang merosakkan ubi kentang
dengan menggunakan radioisotop. Apakah formula kimia bagi sebatian T?
Antara yang berikut, yang manakah sesuai digunakan A MgO
untuk tujuan ini? B MMMgggO22OO23
A Cobalt-60 C
Kobalt-60 D
B Carbon-14
Karbon-14
C Sodium-24
Natrium-24
D Phosphorus-32
Fosforus-32

4541/1 Firasat SPM 2021: Chemistry KM1–2 SULIT

SULIT 4541/1

 8 Table 2 shows the relative formula mass of some 10 Diagram 3 shows part of the Periodic Table of
fertilisers. Elements.
Jadual 2 menunjukkan maklumat tentang jisim formula Rajah 3 menunjukkan sebahagian daripada Jadual Berkala
relatif bagi beberapa baja. Unsur.

Fertilisers Relative molecular mass X YZ
Baja Jisim molekul relatif W

NaNO3 85

NH4NO3 80

(NH4)2SO4 132 Diagram 3
(NH4)3PO4 149 Rajah 3
PENERBIT
ILMU Which element is a metal?
BAKTI SDN. BHD. Unsur manakah ialah logam?
Table 2 A W C Y
Jadual 2

Which of the following fertilisers is the most B X D Z

suitable to increase soil fertility? 11 Atom T has an electron arrangement of 2.4, while
[Relative atomic mass: N = 14] atom U has proton number of 17.
Antara baja berikut, yang manakah paling sesuai untuk What is the property of the compound formed
between elements T and U?
meningkatkan kesuburan tanah? Atom T mempunyai susunan elektron 2.4, manakala
atom U mempunyai nombor proton 17.
[Jisim atom relatif: N = 14] Apakah ciri sebatian yang terbentuk antara unsur T
A (NN(NNaHHHN4N44O))23OSP3 OO3 44 dan unsur U?
B A Soluble in water
C Larut di dalam air
D B Has a high boiling point
Mempunyai takat didih yang tinggi
 9 Diagram 2 shows a graph of the volume of C It can conduct electricity
rceaarbctoionndiboextiwdee,enCOca2 lrceiulemasecdarabgoaniantset, time, for the Boleh mengkonduksi elektrik
hydrochloric acid, HCl. CaCO3 and D Soluble in organic solvents
Larut di dalam pelarut organik
Rajah 2 menunjukkan graf isi padu gas karbon dioksida,

CHanOCta2l.rayaknaglsituermbekbaarsbomnealta,wCaanCmOa3 sdaa,nbaagsiidtihniddraokklboarliaks, 12 Zinc chloride is an ionic compound.
Which substance can dissolve zinc chloride?
Volume oCfOC2O(c2 m(c3m) 3) Zink klorida ialah sebatian ion.
Isi padu Bahan manakah boleh melarutkan zink klorida?

72 A Ether
Eter
Time (s) B Water
Masa (s) Air
C Hexane
Diagram 2 Heksana
Rajah 2 D Methylbenzene
Metilbenzena
What is the mass of calcium carbonate used in the
reaction? 13 Ascorbic acid is a weak acid.
[Molar volume of gas at room conditions = Which of the following is correct about ascorbic acid?
24 dm3 mol–1; Relative atomic mass: C = 12, O = 16, Asid askorbik ialah asid lemah.
Ca = 40] Antara yang berikut, yang manakah betul mengenai
Apakah jisim kalsium karbonat yang digunakan dalam asid askorbik?
tindak balas ini? A It contains low concentration of hydrogen ions
[Isi padu molar gas pada keadaan bilik = 24 dm3 mol–1; Mengandungi kepekatan ion hidrogen yang rendah
Jisim atom relatif: C = 12, O = 16, Ca = 40] B It is completely ionised in water
A 0.30 g Mengion lengkap di dalam air
B 3.00 g C It is slightly soluble in water
C 30.0 g Larut sedikit di dalam air
D 300 g D It has a high melting point
Mempunyai takat lebur yang tinggi

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–3 [Lihat halaman sebelah

SULIT

SULIT 4541/1

14 Which pair of acids is classified correctly? 16 Which of the following is correct about strong
Pasangan asid yang manakah dikelaskan dengan betul? alkaline solutions?
Antara yang berikut, yang manakah betul tentang
Monoprotic acid Diprotic acid larutan alkali kuat?
Asid monoprotik Asid diprotik A Have pH value of 14
Mempunyai nilai pH 14
A Nitric acid Sulphuric acid B Partially ionise in water
Asid nitrik Asid sulfurik Mengion separa di dalam air
C Do not react with acid
B Ethanoic acid Hydrochloric acid Tidak bertindak balas dengan asid
Asid etanoik Asid hidroklorik D Low concentration of hydroxide ion
Kepekatan ion hidroksida yang rendah
C Nitric acid Ethanoic acid
Asid nitrik Asid etanoik

D Sulphuric acid Hydrochloric acid
PENERBIT Asid sulfurik Asid hidroklorik
ILMU 17 The following information shows the properties of
BAKTI SDN. BHD. salt P when heated.
15 Diagram 4 shows the apparatus set-up for the Maklumat berikut menunjukkan sifaLCtao-rosuliteafdantsyoalguntgaiordnaismejukPkan
preparation of a salt. apabila dipanaskan.
Rajah 4 menunjukkan susunan radas bagi penyediaan
suatu garam. cmoillokuyrlweshsengapsawsshedichthtruoHCruarynbgslstuharlthite.

• Releases a
lime water
Membebaskan gas tidak berwarna yang

        LmmeeePalnaavHnglauieensairkntguaynhCLaakao.raoubnlteardnosaywoailrunntgiodknirsaeepjsuuikdrkauneapwabhilean dilalukan
hot and
• yellow when cold.

MsemenagsahapsainlkaasndaCHbnaraybskkltuaiurl nyinanggsembearswaasrenjuak.perang

Cooled solution

Larutan yangWdishejauktkiasn salt P?
Apakah garam P?
Heat CrystaAl Zinc nitrate
Panaskan Hablu r Zink nitrat

B Zinc carbonate
Zink karbonat
C Lead(II) nitrate
Plumbum(II) nitrat
Heat D Lead(II) carbonate
Panaskan

Plumbum(II) karbonat

Cooled solution 18 Which substances are coloured compounds?
Larutan yang disejukkan Bahan manakah ialah sebatian berwarna?

Crystal I Zinc chloride
Hablur Zink klorida
II Copper(II) sulphate
Heat Diagram 4 Kuprum(II) sulfat
Panaskan Rajah 4 III Iron(II) chloride
Ferum(II) klorida
Which salt is prepared through this method? IV Potassium nitrate
Garam manakah disediakan melalui kaedah ini? Kalium nitrat
A Sodium sulphate
Natrium sulfat A I and II
B Lead(II) sulphate I dan II
Plumbum(II) sulfat
C Calcium sulphate B I and III
Kalsium sulfat I dan III
D Magnesium sulphate
Magnesium sulfat C II and IV
II dan IV
D III and IV
III dan IV

4541/1 Firasat SPM 2021: Chemistry KM1–4 SULIT

SULIT 4541/1
Calculate the average rate of reaction for the
19 Siti did a test on compound Y. The following is the reaction.
procedure of the test. Kirakan kadar tindak balas purata bagi tindak balas ini.
Siti menjalankan ujian ke atas sebatian Y. Berikut A 6.40 cm3 min–1
merupakan prosedur bagi ujian tersebut. B 8.00 cm3 min–1
C 9.77 cm3 min–1
Procedure/Prosedur: D 11.80 cm3 min–1
1. Dissolve compound Y in distilled water in a 22 Which of the following is a composite material?
Antara yang berikut, yang manakah ialah bahan komposit?
beaker. A Photochromic glass
Larutkan sebatian Y dalam air suling di dalam Kaca fotokromik
B Lead crystal glass
sebuah bikar. Kaca plumbum
2. Dip a pH meter. C Borosilicate glass
Celupkan meter pH. Kaca borosilikat
3. The reading recorded is 13.0. D Soda-lime glass
Bacaan yang direkodkan ialah 13.0. Kaca soda kapur
PENERBIT 23 Diagram 5 shows alloy P. Its components are iron
ILMU What is compound Y? and carbon.
BAKTI SDN. BHD. Apakah sebatian Y? Rajah 5 menunjukkan aloi P. Komponennya ialah ferum
A MgO dan karbon.
B CuO
C HK2COl Carbon
D Karbon

20 Aminah discovers that potatoes cook much faster Iron
when cut into small pieces. Ferum
Which of the following is the best explanation?
Aminah mendapati kentang yang dipotong kepada saiz Diagram 5
kecil akan masak dengan lebih cepat. Rajah 5
Antara yang berikut, yang manakah paling baik
menerangkan perkara ini? Which of the following is alloy P?
A Absorbs water more easily Antara yang berikut, yang manakah aloi P?
Menyerap air dengan lebih mudah A Duralumin
B Large total surface area Duralumin
Jumlah luas permukaan yang besar B Bronze
C Small total surface area Gangsa
Jumlah luas permukaan yang kecil C Pewter
D Becomes more acidic Piuter
Menjadi lebih berasid D Steel
Keluli
21 Table 3 shows the total volume of oxygen collected
in the decomposition of hydrogen peroxide using 24 Which of the following substances is suitable to
manganese(IV) oxide as a catalyst. convert Fe3+ ions to Fe2+ ions?
Jadual 3 menunjukkan jumlah isi padu oksigen Antara bahan berikut, yang manakah sesuai untuk
yang dikumpul dalam penguraian hidrogen menukarkan ion Fe3+ kepada ion Fe2+?
peroksida menggunakan mangan(IV) oksida sebagai A Zinc powder
mangkin. Serbuk zink
B Bromine water
Time 0.0 1.0 2.0 3.0 4.0 5.0 Air bromin
C Chlorine water
(min) Air klorin
Masa D Acidified potassium manganate(VII) solution
(min) Larutan kalium manganat(VII) berasid

Volume
of gas
(cm3) 0.00 12.20 23.60 29.70 32.00 32.00
Isi padu
gas (cm3)

Table 3
Jadual 3

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–5 [Lihat halaman sebelah

SULIT

SULIT 4541/1
25 Which of the following reactions absorbs heat from
C Covalent compound
the surroundings? Sebatian kovalen
Antara tindak balas berikut, yang manakah menyerap D Hydrocarbon compound
haba daripada persekitaran? Sebatian hidrokarbon
A Rusting
Pengaratan 29 The following equation represents the conversion
B Combustion of propene to compound X through hydrogenation
Pembakaran process.
C Neutralisation Persamaan berikut mewakili tindak balas penukaran
Peneutralan propena kepada sebatian X melalui proses penghidrogenan.
D Photosynthesis
Fotosintesis Propene Hydrogenation Compound X
Propena Penghidrogenan Sebatian X
26 Diagram 6 shows the mechanism of rusting.
Rajah 6 menunjukkan mekanisme pengaratan.

Water droplet
Titisan air
PENERBIT What is compound X?
ILMUIronCathodeAnode Cathode Apakah sebatian X?
BAKTI SDN. BHD.BesiKatodAnodKatod A Propane
Propana
Diagram 6 B Propanol
Rajah 6 Propanol
C Propanoic acid
Which of the following equations represents the Asid propanoik
reaction that occurs at the anode? D Propyl propanoate
Antara persamaan berikut, yang manakah mewakili Propil propanoat

30 Propyl propanoate is found in pears.
Propil propanoat terdapat dalam buah pir.

tindak balas yang berlaku pada anod?
A Fe → Fe2+ + 2e–
B Fe2+ + 2e– → Fe
C O4O2 H+ –2→H2OO2++42eH– →2O4+O4He––
D

27 A method to control rusting of roofing materials is Diagram 7
through sacrificial protection. Rajah 7

Which of the following is a sacrificial metal? What is the homologous series of propyl
Satu kaedah untuk mengawal pengaratan bahan propanoate?
Apakah siri homolog bagi propil propanoat?
bumbung adalah melalui perlindungan logam. A Ester
Antara yang berikut, yang manakah logam korban? Ester
B Alkene
A Copper Alkena
Kuprum C Alcohol
B Lead Alkohol
Plumbum D Carboxylic acid
C Zinc Asid karboksilik
Zink
D Tin
Stanum

28 Propane and water have low melting and boiling 31 The following information is about compound P.
points. Maklumat berikut adalah mengenai sebatian P.

Which of the following is the type of compound of • Organic compound
propane and water? Sebatian organik
• Undergoes substitution reaction
Propana dan air mempunyai takat lebur dan takat didih Menjalani tindak balas penukargantian
yang rendah. Which structural formula represents compound P?
Formula struktur manakah mewakili sebatian P?
Antara yang berikut, yang manakah jenis sebatian bagi
propana dan air?
A Ionic compound
Sebatian ion
B Organic compound
Sebatian organik

4541/1 Firasat SPM 2021: Chemistry KM1–6 SULIT

SULIT 4541/1

A H C The heat absorbed is 189 kJ the
H H H H H Haba yang diserap ialah 189 kJ
D The temperature decreases during
   
HCCCC reaction
Suhu semakin berkurang semasa tindak balas
H H

B 34 An athlete is having muscle cramps. The doctor
treats him with a cold pack.
H H H H What is the chemical used in the cold pack?
    Seorang atlet mengalami kekejangan otot. Doktor
H CCCC merawatnya dengan pek sejuk.
    Apakah bahan kimia yang digunakan dalam pek
H H H H sejuk?
H H H A Magnesium sulphate
C     Magnesium sulfat
CCCH B Ammonium nitrate
    Ammonium nitrat
H OH H C Calcium chloride
H Kalsium klorida
D Sodium chloride
Natrium klorida
PENERBIT
ILMUDH H 35 Diagram 8 shows mercury cells. The cell uses the
BAKTI SDN. BHD.   oxidation of zinc by mercury(II) oxide to generate
C C OH  electricity.
H   Rajah 8 menunjukkan sel merkuri. Sel ini menggunakan
H H pengoksidaan zink oleh merkuri(II) oksida untuk
menjanakan tenaga elektrik.


 32 Substance Q has the following characteristics.
Bahan Q mempunyai ciri-ciri berikut.

• Sour taste Diagram 8
Rasa masam Rajah 8

• Turns moist blue litmus paper to red What is the disadvantage of a mercury cell?
Menukarkan kertas litmus biru lembap kepada Apakah kelemahan sel merkuri?
merah A Too heavy
Sangat berat
• Releases gas bubbles when reacts with zinc B A secondary cell
powder Sel sekunder
Menghasilkan gelembung gas apabila bertindak C Unsteady voltage
balas dengan serbuk zink Voltan yang tidak tetap
D Causes environmental pollution
What is the molecular formula of substance Q? Menyebabkan pencemaran alam sekitar
Apakah formula molekul bagi bahan Q?
A CCCC3232HHHH5857COCOOHOOCH2H5
B
C
D

33 The following equation shows a displacement 36 The following is a thermochemical equation.
reaction and its heat of reaction. Berikut ialah suatu persamaan termokimia.
Persamaan berikut menunjukkan tindak balas
penyesaran dan haba tindak balasnya. HCl + NaOH → NaCl + H2O;  ∆H = –57 kJ mol–1

Mg + Fe2+ → Mg2+ + Fe;   ∆H = –189 kJ mol–1 Calculate the quantity of heat energy released
when 200 cm3 of 2.0 mol dm–3 hydrochloric acid is
Which of the following statements is true about the added to 300 cm3 of 2.0 mol dm–3 sodium hydroxide
reaction? solution.
Pernyataan manakah benar mengenai tindak balas Hitung kuantiti haba yang dibebaskan apabila 200 cm3
tersebut?
A Magnesium is reduced asid hidroklorik 2.0 mol dm–3 ditambah kepada 300 cm3
Magnesium diturunkan
B The reaction is exothermic larutan natrium hidroksida 2.0 mol dm–3.
Merupakan tindak balas eksotermik A 5.70 kJ C 17.40 kJ
B 11.40 kJ D 22.80 kJ

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–7 [Lihat halaman sebelah

SULIT

SULITPENERBIT 4541/1
ILMU
37 The following chemical equation shows theBAKTI SDN. BHD. 39 Aini spilled curry gravy on her beautiful white
reaction of the formation of lead(II) sulphate. blouse. Her mother used a detergent with additive
Persamaan kimia berikut menunjukkan tindak balas X to remove the stain on the blouse during washing.
bagi pembentukan plumbum(II) sulfat. What is additive X? HOTS Applying
Aini tertumpah kuah kari di atas baju putihnya yang
Pb2+(aq/ak) + SO42–(aq/ak) → PbSO4(s/p); cantik. Ibunya menggunakan detergen dengan bahan
∆H = –42 kJ mol–1 tambah X untuk menanggalkan kotoran pada baju
Based on the equation, what is meant by ∆H? tersebut semasa pencucian.
Berdasarkan persamaan tersebut, apakah yang Apakah bahan tambah X?
dimaksudkan dengan ∆H? A Protease
A Heat of neutralisation Protease
Haba peneutralan B Sodium silicate
B Heat of displacement Natrium silikat
Haba penyesaran C Fluorescent dyes
C Heat of precipitation Pewarna pendarfluor
Haba pemendakan D Sodium hydrogen carbonate
D Heat of combustion Natrium hidrogen karbonat
Haba pembakaran
40 A patient is experiencing swelling due to allergic
38 Penicillin and streptomycin are two examples of reactions after being exposed to pollens. Which
of the following medicines is suitable to treat this
type P medicine. patient? HOTS Applying
What is P? Seorang pesakit mengalami bengkak akibat tindak balas
alergi selepas terdedah kepada debunga. Antara ubat
Penisilin dan streptomisin ialah dua contoh ubat jenis P. berikut, yang manakah sesuai bagi merawat pesakit ini?
Apakah P? A Penicillin
A Hormones Penisilin
Hormon B Barbiturate
B Analgesics Barbiturat
Analgesik C Paracetamol
C Antimicrobials Parasetamol
Antimikrob D Betamethasone
D Psychothic drugs Betamethasone
Ubat psikotik

4541/1 Firasat SPM 2021: Chemistry END OF QUESTION PAPER SULIT
KERTAS PEPERIKSAAN TAMAT

KM1–8

SULIT Kertas Model 1

1Kertas Model

no. kad pengenalan Kertas Model 2

2Kertas Model

angka giliran

3sijil pelajaran malaysia 2021
PENERBITcheKmiestrrty as Model Kertas Model 3
ILMUKertas 2
BAKTI SDN. BHD. 4541/2

42—12 Kertas Model 4Dua jam tiga puluh minit
jam Model

Kertas
JANGAN BUKA KERTAS PEPERIKSAAN INI SEHINGGA DIBERITAHU

Information for candidates Untuk Kegunaan Pemeriksa
Maklumat untu k calon Kertas Model 5Kod Pemeriksa:

Kertas Model 51. This exam paper consists of three sections: Bahagian Soalan
Section A, Section B and Section C. Markah Markah
Kertas peperiksaan ini mengandungi tiga Penuh Diperoleh

bahagian: Bahagian A, Bahagian B dan 15

25

Bahagian C. 63 6
2. Answer all questions in Section A. Write your
KAertas54 Mod78el
Kertas Model 6answers for Section A in the spaces provided in 69
this exam paper.

Jawab semua soalan dalam Bahagian A. 7 10 7
Tulis jawapan anda bagi Bahagian A pada ruang 8 10
yang disediakan dalam kertas peperiksaan ini.
KBertas190 Mod2200el
Kertas Model 73. Answer one question from Section B. Answer all C 11 20
questions from Section C. Write your answers Jumlah
for Section B and Section C on the ‛helaian
tambahan’ provided by the invigilators.

Jawab satu soalan daripada Bahagian B. Kertas Model 8
Jawab semua soalan daripada Bahagian C.
Tulis jawapan anda bagi Bahagian B dan

Kertas Model 8Bahagian C dalam helaian tambahan yang
dibekalkan oleh pengawas peperiksaan.

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

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

6. You may use a scientific calculator.
Anda dibenarkan menggunakan kalkulator saintifik.

Kertas peperiksaan ini mengandungi 16 halaman bercetak.

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–9 [Lihat halaman sebelah

SULIT

SULIT Section A 4541/2
For Bahagian A [1 mark/ markah]

Examiner’s [60 marks]
Use [60 markah]

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

1 Diagram 1 shows the standard representation of two isotopes of an atom.
Rajah 1 menunjukkan perwakilan piawai dua isotop bagi suatu atom.

x Y12 14
66

  
Diagram 1

Rajah 1

(a) Based on Diagram 1, define isotope.
Berdasarkan Rajah 1, nyatakan definisi isotop.

1(a)
PENERBIT
ILMU1
BAKTI SDN. BHD.
(b) Determine the number of neutrons in
Tentukan bilangan neutron dalam
(i) element/ unsur X:

1(b) (ii) element/ unsur Y: [2 marks/ markah]

2

(c) State one use of elements X and Y. HOTS Applying
Nyatakan satu kegunaan unsur X dan unsur Y.
(i) Element/ Unsur X:

(ii) Element/ Unsur Y: [2 marks/ markah]

1(c)
2

Total KM1–10 SULIT
A1
5

4541/2 Firasat SPM 2021: Chemistry

SULIT 4541/2

2 Diagram 2 shows part of the Periodic Table of Elements. P, Q, R and S do not represent the actual For
symbols of the elements. Examiner’s
Rajah 2 menunjukkan sebahagian daripada Jadual Berkala Unsur. P, Q, R dan S tidak mewakili simbol
sebenar unsur berkenaan. Use

qr
ps
PENERBIT
ILMU
BAKTI SDN. BHD.
Diagram 2
Rajah 2

By using the letters in the Periodic Table of Elements in Diagram 2, answer the following
questions.
Dengan menggunakan huruf-huruf yang terdapat dalam Jadual Berkala Unsur pada Rajah 2, jawab
soalan-soalan berikut.
(a) State the position of element P in the Periodic Table of Elements.
Nyatakan kedudukan unsur P dalam Jadual Berkala Unsur.

[2 marks/ markah] 2(a)
(b) Choose the element which has multiple oxidation numbers in its compounds. 2

Pilih unsur yang mempunyai pelbagai nombor pengoksidaan dalam sebatiannya. 2(b)
1
[1 mark/ markah]
2(c)(i)
(c) Element P combines with element R to form a compound. 1
Unsur P bergabung dengan unsur R untuk membentuk suatu sebatian.
2(c)(ii)
(i) What type of compound is formed? 1
Apakah jenis sebatian yang terbentuk?

(ii) State one physical property of this compound. [1 mark/ markah]
Nyatakan satu sifat fizik sebatian ini.

[1 mark/ markah]

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 KM1–11 Total
A2

5

[Lihat halaman sebelah

SULIT

SULIT 4541/2

For 3 Diagram 3 shows a list of materials.
Examiner’s Rajah 3 menunjukkan satu senarai bahan.

Use • Hydrochloric acid, HCl
Asid hidroklorik, HCl3
• Nitric acid, HNO3
Asid nitrik, HNO3
• Methanoic acid, HCOOH
Asid metanoik, HCOOH
• Sodium hydroxide, NaOH
Natrium hidroksida, NaOH
PENERBIT
ILMU Diagram 3
BAKTI SDN. BHD. Rajah 3

(a) Define acid.
Nyatakan maksud asid.

3(a)

1 [1 mark/ markah]
3(b)(i)
(b) Hydrochloric acid, HCl reacts with sodium hydroxide solution, NaOH to form salt and
water.
Asid hidroklorik, HCl bertindak balas dengan larutan natrium hidroksida, NaOH untuk membentuk
garam dan air.

(i) Name the salt formed.
Namakan garam yang terbentuk.

1 (ii) Name the reaction that occurred. [1 mark/ markah]
3(b)(ii) Namakan tindak balas yang berlaku. [1 mark/ markah]

1 (iii) Write a balanced chemical equation for this reaction.
3(b)(iii) Tulis persamaan kimia seimbang bagi tindak balas ini.

2 [2 marks/ markah]

(c) Table 1 shows the pH values of 0.2 mol dm–3 nitric acid and 0.2 mol dm–3 methanoic acid.

HOTS Analysing

Jadual 1 menunjukkan nilai pH bagi asid nitrik 0.2 mol dm–3 dan asid metanoik 0.2 mol dm-3.

Type of acid pH value
Jenis asid Nilai pH

Nitric acid
Asid nitrik

Methanoic acid 3
Asid metanoik

3(c) Table 1
Jadual 1
1
Total Predict the pH value of nitric acid. Write your answer in the space provided in Table 1.
Ramalkan nilai pH bagi asid nitrik. Tulis jawapan anda pada ruang yang disediakan dalam Jadual 1.
A3 [1 mark/markah]
6

4541/2 Firasat SPM 2021: Chemistry KM1–12 SULIT

SULIT 4541/2

4 Table 2 shows the results of two experiments to investigate the rate of reaction between zinc For
powder and two different acids. Examiner’s
Jadual 2 menunjukkan dua eksperimen untuk mengkaji kadar tindak balas antara serbuk zink dan dua Use

jenis asid yang berbeza.

Experiment Reactants Time taken for a
Eksperimen Bahan tindak balas
complete reaction (s)

Masa yang diambil
untuk tindak balas

lengkap (s)

I Zinc powder + 100 cm3 of 0.5 mol dm-3 sulphuric acid 30
Serbuk zink + 100 cm3 asid sulfurik 0.5 mol dm-3
PENERBIT
ILMU Zinc powder + 100 cm3 of 0.5 mol dm-3 hydrochloric 70
BAKTI SDN. BHD.II acid

Serbuk zink + 100 cm3 asid hidroklorik 0.5 mol dm-3

Table 2 4(a)
Jadual 2 1

(a) State a factor that can affect the rate of reaction in the experiment.
Nyatakan satu faktor yang boleh mempengaruhi kadar tindak balas dalam eksperimen tersebut.

[1 mark/ markah]
(b) Draw the apparatus set-up to determine the rate of reaction in the experiment. HOTS Applying

Lukis susunan radas untuk menentukan kadar tindak balas dalam eksperimen ini.

[2 marks/ markah] 4(b)
2

(c) (i) Write the ionic equation for Experiment II. 4(c)(i)
Tulis persamaan ion bagi Eksperimen II. 1

[1 mark/ markah]

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SULIT

SULIT 4541/2
For
(ii) Calculate the maximum volume of gas released at STP in Experiment II.
Examiner’s [Molar volume of gas at STP = 22.4 dm3 mol-1] HOTS Analysing
Use
Hitung isi padu maksimum gas yang terbebas pada STP dalam Eksperimen II.
[Isi padu molar gas pada STP = 22.4 dm3 mol-1]

4(c)(ii)PENERBIT [3 marks/ markah]
ILMU
3 BAKTI SDN. BHD.
Total

A4

7

5 Diagram 4 shows the mechanism of rusting on the surface of an iron pipe.
Rajah 4 menunjukkan mekanisme pengaratan pada permukaan paip besi.

Water droplet
Titisan air
O2 O2

Cathode e- e- Iron pipe
Katod Paip besi
Anode
Anod

Diagram 4
Rajah 4

(a) (i) Write the half equation for the reaction at the anode during rusting.
Tulis setengah persamaan bagi tindak balas pada anod semasa pengaratan.

5(a)(i) (ii) State the reaction that occurred at the anode. [1 mark/ markah]
1 Nyatakan tindak balas yang berlaku pada anod.

5(a)(ii) [1 mark/ markah]
1 (iii) Explain your answer in 5(a)(ii) based on the change in oxidation number. HOTS Evaluating

5(a)(iii) Terangkan jawapan anda di 5(a)(ii) berdasarkan perubahan nombor pengoksidaan.
2
[2 marks/ markah]
5(b)(i) (b) (i) Write the half equation for the reaction at the cathode during rusting.
1
Tulis setengah persamaan bagi tindak balas pada katod semasa pengaratan.
5(b)(ii)
1 (ii) State the reaction that occurred at the cathode. [1 mark/ markah]
Nyatakan tindak balas yang berlaku pada katod.

[1 mark/ markah]

4541/2 Firasat SPM 2021: Chemistry KM1–14 SULIT

SULIT 4541/2
(iii) Explain your answer in 5(b)(ii) based on the transfer of electrons. HOTS Evaluating
Terangkan jawapan anda di 5(b)(ii) berdasarkan pemindahan elektron. For
Examiner’s

Use
5(b)(iii)

[2 marks/ markah] 2
Total
6 Diagram 5.1 shows the apparatus set-up for soap preparation.
Rajah 5.1 menunjukkan susunan radas bagi penyediaan sabun. A5

8

Sodium chloride
Natrium klorida
PENERBIT
ILMUPalm oil + sodium hydroxide solution
BAKTI SDN. BHD.Minyak sawit + larutan natrium hidroksida

Heat 6(a)
Panaskan 1

Diagram 5.1 6(b)
Rajah 5.1 1

(a) Name the process of soap preparation. 6(c)
Namakan proses penyediaan sabun. 2

[1 mark/ markah]
(b) Why is soap less effective as a cleaning agent in hard water compared to detergent?

HOTS Evaluating

Mengapakah sabun kurang berkesan sebagai bahan pencuci dalam air liat berbanding dengan detergen?

[1 mark/ markah]
(c) Suggest another pair of substances that can be used to prepare soap in the laboratory. HOTS Creating

Cadangkan satu pasangan bahan lain yang boleh digunakan untuk menyediakan sabun di dalam
makmal.

[2 marks/ markah]

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SULIT 4541/2
For
(d) Diagram 5.2 shows a label on a bottle of chilli sauce.
Examiner’s Rajah 5.2 menunjukkan label pada botol sos cili.
Use

PENERBIT
ILMU
BAKTI SDN. BHD. Ingredients: Monosodium glutamate, benzoic acid, red 40
Bahan: Mononatrium glutamat, asid benzoik, merah 40

Diagram 5.2
Rajah 5.2

(i) Match the food additives in Diagram 5.2 to their type.
Padankan bahan tambah makanan dalam Rajah 5.2 dengan jenisnya.

Food additive Type of food additive
Bahan tambah makanan Jenis bahan tambah makanan

Monosodium glutamate Dye
Mononatrium glutamat Pewarna

Benzoic acid Flavouring
Asid benzoik Perisa

Red 40 Preservative
Merah 40 Bahan pengawet

6(d)(i) [3 marks/ markah]
3 (ii) State one side effect of excessive use of the ‘red 40’ substance.

6(d)(ii) Nyatakan satu kesan sampingan penggunaan bahan ‘merah 40’ secara berlebihan.
1 [1 mark/ markah]

6(d)(iii) (iii) Name one type of natural food additive that gives colour to food.
1 Namakan sejenis bahan tambah makanan semula jadi yang memberikan warna kepada makanan.
[1 mark/ markah]
Total
A6
9

4541/2 Firasat SPM 2021: Chemistry KM1–16 SULIT

SULIT 4541/2
7 (a) (i) What is meant by strong alkali?
[1 mark/ markah] For
Apakah yang dimaksudkan dengan alkali kuat? Examiner’s

(ii) Give an example of a strong alkali. Use
Berikan satu contoh alkali kuat. 7(a)(i)

1

7(a)(ii)

[1 mark/ markah] 1

(b) Diagram 6 shows the set-up of apparatus of an experiment to study the acidic property of
hydrogen chloride gas, HCl in water and in benzene.

Rajah 6 menunjukkan susunan radas satu eksperimen untuk mengkaji sifat keasidan gas hidrogen
klorida, HCl dalam air dan dalam benzena.

Delivery tube
Tiub penghantar
PENERBIT
Rubber stopperILMU Test tube Test tube
Penyumbat getah BAKTI SDN. BHD. Tabung uji Tabung uji
Solution X + Water
substance Y Air
Larutan X +
bahan Y

Delivery tube
Tiub penghantar

Rubber stopper Test tube Test tube
Penyumbat getah Tabung uji Tabung uji
Solution X + Benzene
substance Y Benzena
Larutan X +
bahan Y

Diagram 6
Rajah 6

(i) Solution X is added to substance Y to produce hydrogen chloride gas.
What are solution X and substance Y?

Larutan X ditambahkan kepada bahan Y untuk menghasilkan gas hidrogen klorida.
Apakah larutan X dan bahan Y?

(ii) Write the balanced chemical equation for the reaction in 7(b)(i). [2 marks/ markah] 7(b)(i)
Tulis persamaan kimia seimbang bagi tindak balas di 7(b)(i). 2

[2 marks/ markah] 7(b)(ii)
2

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SULIT 4541/2
For
(iii) Based on Diagram 6, complete the observations of the experiment in Table 3.
Examiner’s Berdasarkan Rajah 6, lengkapkan pemerhatian bagi eksperimen tersebut dalam Jadual 3.
Use

Experiment HCl in water HCl in benzene
Eksperimen HCl dalam air HCl dalam benzena

Test
Ujian

With marble chips
Dengan ketulan marmar
PENERBIT
7(b)(iii) ILMU With zinc granules
4 BAKTI SDN. BHD.Dengan ketulan zink

Total Table 3
A7 Jadual 3
10
[4 marks/ markah]

8 (a) Diagram m7.e1nsuhnojuwkskaangsaastujabracloanntgaginasinyganagmmmeonngaiandguans,gNi gHas3.ammonia,
Rajah 7.1
NH3.

2.0 moles of
ammonia gas
2.0 mol gas
ammonia

Diagram 7.1
Rajah 7.1

Calculate the number of molecules of ammonia in the gas jar. HOTS Analysing
[Avogadro constant = 6.02 × 1023]

Hitung bilangan molekul ammonia di dalam balang gas tersebut.
[Pemalar Avogadro = 6.02 × 1023]

8(a) KM1–18 [2 marks/ markah]
2 SULIT

4541/2 Firasat SPM 2021: Chemistry

SULIT 4541/2

(b) Urea, CCpeOOrt((aNNnHiHa2n2)).22 and aammmmoonniuiummnnitirtraat,teN, NHH4N4ON3Om3 aerruepwakidanelybaujaseydafnegrtdiliigsuenrsakinanagsreiccauraltumreel.uas For
Urea, dan Examiner’s
dalam
Use

Urea, CCOO((NNHH2)2)22 Ammonium nitrate,
Urea, ANmHm4NonOiu3 m nitrat,
NH4NO3

PENERBIT Diagram 7.2
ILMU Rajah 7.2
BAKTI SDN. BHD.
Which fertiliser is more effective? Explain your answer. HOTS Evaluating
[Relative atomic mass: N = 14, O = 16, C = 12, H = 1]

Baja yang manakah lebih berkesan? Terangkan jawapan anda.
[Jisim atom relatif: N = 14, O = 16, C = 12, H = 1]

[6 marks/ markah] 8(b)
6
(c) Substance P has a melting point of 70 °C and a boiling point of 250 °C.
Sketch a graph of temperature against time when substance P is heated from 50 °C to 110 °C.

HOTS Applying

Bahan P mempunyai takat lebur 70 °C dan takat didih 250 °C.
Lakar graf suhu melawan masa apabila bahan P dipanaskan daripada 50 °C kepada 110 °C.

8(c)

2
Total

A8

[2 marks/ markah] 10

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SULIT

SULIT 4541/2

Section B
Bahagian B
[20 marks]
[20 markah]

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

9 (a) Mr Lim is a plumber. He used PVC pipes to replace metal pipes. Diagram 8 shows the molecular
structure of polyvinyl chloride polymer in PVC pipes.
Encik Lim ialah seorang tukang paip. Dia menggunakan paip PVC bagi menggantikan paip logam. Rajah 8
menunjukkan struktur molekul polimer polivinil klorida dalam paip PVC.

PENERBIT
ILMU
BAKTI SDN. BHD.
Diagram 8
Rajah 8

(i) State the name for the monomer of PVC.
Draw the structural formula of the monomer. HOTS Applying

Nyatakan nama bagi monomer PVC.
Lukis formula struktur bagi monomer tersebut.

[2 marks/ markah]
(ii) Explain the advantages of PVC pipes compared to metal pipes. HOTS Evaluating

Terangkan kelebihan paip PVC berbanding dengan paip logam.
[2 marks/ markah]

(iii) Polythene and polyvinyl chloride (PVC) are examples of synthetic polymer. The disposal and
burning of used synthetic polymers cause environmental pollutions.

Suggest the steps that can be taken to overcome the environmental pollutions caused by improper
disposal of synthetic polymers. HOTS Creating
Politena dan polivinil klorida (PVC) ialah contoh-contoh polimer sintetik. Pembuangan dan pembakaran
bahan polimer sintetik terpakai menyebabkan masalah pencemaran alam sekitar.
Cadangkan langkah-langkah yang boleh diambil untuk mengatasi masalah pencemaran alam sekitar yang
disebabkan oleh pembuangan polimer sintetik secara tidak wajar.
[4 marks/ markah]

(b) Table 4 shows the results of the experiment to investigate the coagulation of latex.
Jadual 4 menunjukkan keputusan eksperimen untuk menyiasat penggumpalan lateks.

Procedure Observation
Prosedur Pemerhatian

Compound S is added to latex The latex coagulates immediately
Sebatian S ditambah kepada lateks Lateks menggumpal dengan serta merta

Compound T is added to latex The latex does not coagulate within a longer period
Sebatian T ditambah kepada lateks Lateks tidak menggumpal dalam suatu tempoh yang lebih
lama

Latex is left under natural conditions The latex coagulates slowly
Lateks dibiarkan pada keadaan semula jadi Lateks menggumpal dengan perlahan

Table 4
Jadual 4

4541/2 Firasat SPM 2021: Chemistry KM1–20 SULIT

SULIT 4541/2

Explain why the observations are different. HOTS Evaluating [6 marks/ markah]
Suggest compound T.
Terangkan mengapa pemerhatian tersebut berbeza.
Cadangkan sebatian T.

(c) (i) Natural rubber is a natural polymer. Natural rubber compounds cannot withstand high heat.
State the name of the monomer for natural rubber.
Name the process that can improve the heat resistance in rubber.

Getah asli merupakan sejenis polimer semula jadi. Sebatian getah asli tidak tahan haba.
Nyatakan nama bagi monomer getah asli.
Namakan proses yang boleh meningkatkan ketahanan getah terhadap haba.

[2 marks/ markah]
(ii) Explain why the rubber that has undergone the process mentioned in 9(c)(i) is stronger than the

natural rubber. HOTS Evaluating
Terangkan mengapa getah yang telah menjalani proses yang disebut dalam 9(c)(i) lebih kuat daripada getah
asli.

[4 marks/ markah]
PENERBIT
ILMU
BAKTI SDN. BHD.
10 (a) Diagram 9.1 shows a flow chart of a series of reactions involving some compounds.
Rajah 9.1 menunjukkan carta alir bagi satu siri tindak balas melibatkan beberapa sebatian.

Ethanol Acidified KMnO4 solution Organic compound M
Larutan KMnO4 berasid Sebatian organik M

Etanol H2SO4 Hydrocarbon compound P
Sebatian hidrokarbon P
Hot porcelain chips
Serpihan porselin panas
Nickel
Nikel
Hydrocarbon compound N
Sebatian hidrokarbon N
Heat
Panaskan

Diagram 9.1
Rajah 9.1

(i) Identify M, N and P using the IUPAC nomenclature and draw their structural formulae.
Kenal pasti bahan M, N dan P dengan menggunakan penamaan IUPAC dan lukis formula strukturnya.
[6 marks/ markah]

(ii) Acidified potassium manganate(VII) solution is added slowly to compound N and compound P in a
separate test tubes.

State the observations and explain your answer. HOTS Evaluating
Larutan kalium manganat(VII) berasid ditambahkan perlahan-lahan kepada sebatian N dan P dalam tabung
uji yang berasingan.
Nyatakan pemerhatian anda dan beri penerangan untuk pemerhatian tersebut.
[4 marks/ markah]

(iii) When ethanol reacts with compound M, an organic compound is formed.
Describe how this reaction is carried out. HOTS Creating

Apabila etanol bertindak balas dengan sebatian M, satu sebatian organik terbentuk.
Huraikan bagaimana tindak balas ini dapat dijalankan.

[3 marks/ markah]

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SULIT 4541/2

(b) A synthetic polymer can be formed by joining together thousands of molecule Z. Diagram 9.2 shows the
structural formula of molecule Z.
Satu polimer sintetik boleh dihasilkan daripada gabungan beribu-ribu molekul Z. Rajah 9.2 menunjukkan formula
struktur bagi molekul Z.
H H

CC

H H

Molecule Z
Molekul Z

Diagram 9.2
Rajah 9.2

(i) Molecule Z is a member of a homologous series.
Identify the homologous series of molecule Z and write the molecular formula.

Molekul Z ialah ahli bagi suatu siri homolog.
Kenal pasti siri homolog bagi molekul Z dan tulis formula molekulnya.

[2 marks/ markah]
(ii) The polymer is formed through the addition polymerisation reaction of molecule Z.
Draw the structural formula of the polymer and give two uses of the polymer in daily life. HOTS Applying

Polimer tersebut terbentuk melalui tindak balas pempolimeran penambahan molekul Z.
Lukis formula struktur bagi polimer itu dan berikan dua kegunaannya dalam kehidupan harian.

[3 marks/ markah]
(iii) Synthetic polymers are widely used today. The degradation of large polymer materials such as

plastic bags, plastic bottles and fishing nets produces microplastics.
Polimer sintetik digunakan secara meluas pada masa kini. Penguraian bahan polimer besar seperti beg plastik,
botol plastik dan jaring ikan menghasilkan mikroplastik.
What are the effects of microplastics on marine life? HOTS Creating
Apakah kesan-kesan mikroplastik kepada hidupan laut?

[2 marks/ markah]
PENERBIT
ILMU
BAKTI SDN. BHD.

4541/2 Firasat SPM 2021: Chemistry KM1–22 SULIT

SULIT 4541/2

Section C
Bahagian C
[20 marks]
[20 markah]

Answer all questions from this section.
Jawab semua soalan daripada bahagian ini.

11 (a) In an experiment to determine the heat of displacement, excess metal M is added to 100 cm3 of
0.5 mol dm-3 lead(II) nitrate solution.
• Suggest metal M.
• Calculate the temperature change if the heat of displacement is –112 kJ mol–1. HOTS Analysing
[Specific heat capacity of solution = 4.2 J g–1 oC–1; Density of solution = 1 g cm–3]
Dalam satu eksperimen untuk menentukan haba penyesaran, logam M ditambah secara berlebihan kepada larutan
plumbum(II) nitrat 100 cm3 0.5 mol dm-3.
• Cadangkan logam M.
• Hitung perubahan suhu jika haba penyesaran dalam eksperimen itu ialah –112 kJ mol–1.
[Muatan haba tentu larutan = 4.2 J g–1 °C–1; Ketumpatan larutan = 1 g cm–3]
[4 marks/ markah]
PENERBIT
ILMU
BAKTI SDN. BHD.
(b) Diagram 10 shows the heat of reaction between sodium carbonate and two different reactants.
Rajah 10 menunjukkan haba tindak balas antara natrium karbonat dengan dua bahan tindak balas yang berbeza.

Reaction I Reaction II
Tindak balas I Tindak balas II

Stir Stir
Kacau Kacau

Magnesium nitrate Hydrochloric acid
Magnesium nitrat Asid hidroklorik

Sodium carbonate Sodium carbonate
Natrium karbonat Natrium karbonat

Heat of reaction: +X kJ mol-1 Heat of reaction: +Y kJ mol-1
Haba tindak balas:+X kJ mol-1 Haba tindak balas:+Y kJ mol-1

Diagram 10
Rajah 10

Based on Diagram 10, compare Reaction I and Reaction II in terms of: HOTS Analysing
• Type of reaction: Exothermic or endothermic
• Temperature change
• Change in total energy content of reactants and total energy content of products
Berdasarkan Rajah 10, bandingkan Tindak balas I dengan Tindak balas II dari segi:

• Jenis tindak balas: Eksotermik atau endotermik

• Perubahan suhu

• Perubahan jumlah kandungan tenaga bahan tindak balas dan jumlah kandungan tenaga hasil tindak balas
[6 marks/ markah]

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SULIT 4541/2

(c) By using an example of metal, describe an experiment to determine the heat of displacement of the metal
from copper(II) sulphate solution.

Your answers should include the following: HOTS Creating
• Materials and apparatus
• Procedure of the experiment
• Method to calculate the heat of displacement
Dengan menggunakan satu contoh logam, huraikan satu eksperimen untuk menentukan haba penyesaran logam
tersebut daripada larutan kuprum(II) sulfat.
Jawapan anda haruslah mengandungi perkara berikut:
• Bahan dan radas
• Prosedur eksperimen
• Kaedah untuk menghitung haba penyesaran
[10 marks/ markah]
PENERBIT
ILMU
BAKTI SDN. BHD.

4541/2 Firasat SPM 2021: Chemistry END OF QUESTION PAPER SULIT
KERTAS PEPERIKSAAN TAMAT

KM1–24

Answers

Kertas Model 1 (b)

Paper 1
 1 D  2 B  3 A  4 b  5 DPENERBIT Hydrochloric acid
 6 A  7 A  8 B  9 a 10 BILMU Asid hidroklorik
11 D 12 B 13 A 14 A 15 DBAKTI SDN. BHD.
16 A 17 D 18 A 19 A 20 B Zinc powder Water
21 B 22 A 23 D 24 D 25 D Serbuk zink Air
26 A 27 C 28 C 29 A 30 A
31 B 32 C 33 B 34 B 35 D (c) (i) Zn + 2H+ → Zn2+ + H2
36 D 37 C 38 C 39 D 40 D (ii) Number of moles of HCl
Bilangan mol HCl
Paper 2
Section A = 100 cm3 × 0.5 mol dm–3 = 0.05 mol
 1 (a) Two or more of the same elements that have 1000
2 mol HCl : 1 :m0o.0l2H5 2mol
the same proton number but different nucleon 0.05 mol HCl H2
numbers.
Dua atau lebih elemen yang sama yang mempunyai VI=soi0lp.u0am2d5ue×Ho2f2 2pH.a4d2 adatmSST3TPP
nombor proton yang sama tetapi nombor nukleon yang
berbeza. = 0.56 dm3
(b) (i) Element/Unsur X: 6
(ii) Element/Unsur Y: 8 = 560 cm3
(c) (i) Element X: The standard relative to which the  5 (a) (i) Fe → Fe2+ + 2e–

atomic weights of all the other elements are (ii) Oxidation
measured
Unsur X: Sebagai relatif piawai untuk mengukur berat Pengoksidaan
atom bagi semua unsur lain.
Element Y: To estimate the age of the fossils (iii) Oxidation number of iron increases from 0 to +2
Unsur Y: Menganggar umur fosil
 2 (a) Group 1, Period 4 Nombor pengoksidaan ferum meningkat daripada 0
Kumpulan 1, Kala 4
(b) S kepada +2
(c) (i) Ionic compound
Sebatian ion ( b) ((iii)) ORe2d+u2ctHio2On + 4e– → 4OH–
(ii) (Any one)
Soluble in water/High melting and boiling points/ Penurunan
Conducts electricity in molten state or aqueous
solution. (iii) Oxygen and water gain electrons to form hydroxide
(Mana-mana satu)
Larut di dalam air/Takat lebur dan takat didih tinggi/ ion
Boleh mengkonduksikan elektrik dalam keadaan leburan
atau larutan akueus. Oksigen dan air menerima elektron untuk membentuk
 3 (a) A chemical substance that ionises in water to produce
hydrogen ions. ion hidroksida
Bahan kimia yang mengion dalam air untuk menghasilkan
ion hidrogen.  6 (a) Saponification
(b) (i) Sodium chloride, NaCl
Natrium klorida, NaCl Saponifikasi
(ii) Neutralisation
Peneutralan (b) Soap forms scum in hard water but detergent forms
(iii) NaOH + HCl → NaCl + H2O
(c)  3 Or/Atau a soluble organic acid.
pH = –log[H+]
= –log[0.2] Sabun membentuk kekat dalam air liat tetapi detergen
= 0.70
 4 (a) Concentration of hydrogen ions membentuk asid organik terlarut.
Kepekatan ion hidrogen
(c) Potassium hydroxide solution and olive oil/coconut

oil

Larutan kalium hidroksida dan minyak zaitun/minyak kelapa

(d) (i)

Food additive Type of food additive
Bahan tambah Jenis bahan

makanan tambah makanan

Monosodium glutamate Flavouring
Mononatrium glutamat Perisa

Benzoic acid Preservative
Asid benzoik Bahan pengawet

Red 40 Dye
Merah 40 Pewarna

•A1• Firasat SPM 2021: Chemistry – Answers

(ii) Causes allergies Type of fertiliser % of nitrogen
Menyebabkan alergi Jenis baja % nitrogen
(iii) Turmeric root/Pandan leaves/Beet root
Kunyit/Daun Pandan/Ubi bit Urea = 2 × 14 × 100
 7 (a) (i) Substances that ionise completely in water Urea 60

to produce high concentration hydroxide ions, = 46.6 %
OH–.
Bahan yang mengion dengan lengkap dalam air untuk Ammonium nitrate = 2 × 14 × 100
menghasilkan ion hidroksida, OH– dengan kepekatan Ammonium nitrat 80

tinggi. = 35.0%
(ii) Potassium hydroxide, KOH
Kalium hidroksida, KOH Urea is more effective because it has a higher percentage
(b) (i) Solution X: Concentrated sulphuric acid of nitrogen by mass.
Larutan X: Asid sulfurik pekat
Substance Y: Sodium chloride Urea lebih berkesan kerana mengandungi peratusan
Bahan Y: Natrium klorida nitrogen yang lebih tinggi mengikut jisim.
(ii) 2NaCl + H2SO4 → 2HCl + Na2SO4
(c)
(iii)PENERBIT Experiment HCl in HCl in
ILMUEksperimenwater benzene
BAKTI SDN. BHD. HCl dalam Temperature (oC)
Test HCl dalam air benzena Suhu (oC)
Ujian
110

With marble Effervescence No 70
chips occurs. Gas reaction
Dengan ketulan turns lime Tiada
marmar water
chalky. tindak balas
Pembuakan
Time (s)
gas berlaku. Masa (s)

Gas Section B
 9 (a) (i) Vinyl chloride/Chloroethene
mengeruhkan Vinil klorida/Kloroetena

air kapur.

With zinc Effervescence No [1]
granules occurs. Gas reaction
Dengan ketulan gives a ‘pop’ Tiada H  H
zink sound when C C
tested with tindak balas
a burning H Cl
wooden [1]
splinter
Pembuakan (ii) PVC does not corrode/rust

gas berlaku. PVC tidak terkakis/karat [1]

Gas Metal pipes corrode/rust

menghasilkan Paip logam akan terkakis/karat [1]

bunyi ‘pop’ (iii) Recycle/Reduce usage/Reuse/Produce

apabila diuji biodegradable synthetic polymer products/Burn

dengan kayu in special incinerators/Sort and separate wastes

uji bernyala Kitar semula/Kurangkan penggunaan/Guna semula/

Hasilkan polimer sintetik yang terbiodegradasikan/

Bakar dalam pembakar khas/Asingkan sampah

(Any four/Mana-mana empat)

 8 (a) 2 mol × 6.02 × 1023 [4]

= 1.20 × 1024 molecules/ molekul (b) Compound S contains a high concentration of hydrogen
(b) RMM of urea/JMR urea, CO(NH2)2
= 12 + 16 + 2(14) + 4(1) = 60 ions, H+. H+ ions neutralise the negative charges on
RMM of ammonium nitrate/ JMR ammonium nitrat,
=NH144N+O43(1) + 14 + 3(16) the protein membranes. The rubber particles collide
= 80
and the protein membranes break. Rubber molecules

are released and combined. Therefore, latex coagulates

immediately.

Compound T contains hydroxide ions, OH–. The

protein membranes do not break. Therefore, latex

does not coagulate.

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 •A2•

The presence of bacteria in natural conditions produces Sebatian N mengalami tindak balas penambahan

weak acid/low concentration of H+ ions. Therefore, kerana terdapat ikatan ganda dua dalam strukturnya.

latex coagulates slowly. Sebatian P ialah sebatian tepu tanpa ikatan ganda

Sebatian S mengandungi ion hidrogen, H+ dengan kepekatan dua. Jadi, tindak balas penambahan tidak boleh

tinggi. Ion H+ meneutralkan cas negatif pada membran berlaku. [2]
( iii) 1. 2 cm3 of ethanol is added to 2 cm3 of compound
protein. Zarah-zarah berlanggar antara satu sama lain M in a boiling tube.

dan membran protein pecah. Molekul getah dilepaskan 2 cm3 etanol ditambahkan kepada 2 cm3 sebatian

dan bergabung. Oleh itu, lateks menggumpal dengan serta M dalam tabung didih. [1]

merta. 2. The mixture is shaken and about 1 cm3 of

Sebatian T mengandungi ion hidroksida, OH–. Membran concentrated sulphuric acid is added to it

protein tidak pecah. Oleh itu, lateks tidak bergumpal. slowly.

Kehadiran bakteria dalam keadaan semula jadi menghasilkan Campuran digoncang dan kira-kira 1 cm3 asid

asid lemah/ion H+ dengan kepekatan rendah. Oleh itu, lateks sulfurik pekat ditambahkan ke dalam tabung didih

menggumpal perlahan-lahan. [5]
PENERBIT perlahan-lahan. [1]
ILMU Compound T: Ammonia
BAKTI SDN. BHD. 3. The mixture is carefully heated over a low
Sebatian T: Ammonia [1]
flame for about 2 – 3 minutes.
(c) (i) Monomer: Isoprene
Campuran dipanaskan dengan berhati-hati di atas
Monomer: Isoprena [1]
api kecil selama lebih kurang 2 – 3 minit. [1]
Process: Vulcanisation
(b) (i) Alkene/Alkena [1]
Proses: Pemvulkanan [1]
CnH2n, n = 2, 3, 4, … [1]
(ii) Sulphur cross links between the vulcanised (ii) H  H

rubber molecules prevent them from sliding over

each other. Vulcanised rubber will return to its
C C
original form after being stretched and released.

Rangkai silang sulfur di antara molekul getah tervulkan

menghalang penggelongsoran antara molekul. Getah H H n

tervulkan akan kembali ke bentuk asal selepas diregang n = 2, 3, 4, … [1]

dan dilepaskan. [4] Uses
10 (a) (i) Compound M: Ethanoic acid
Sebatian M: Asid etanoik [1] Kegunaan:

H 1. Manufacture of plastic bags

O Pembuatan beg plastik

HCC 2. Manufacture of textile

Pembuatan tekstil
H
OH 3. Packaging industries

[1] Industri pembungkusan
[1]
(Any two/Mana-mana dua)
Compound N: Ethene [2]
Sebatian N: Etena (iii) 1. Aquatic animals ingest the microplastics and
caused blockage in the digestive tracts.
Haiwan akuatik memakan mikroplastik
dan menyebabkan halangan dalam saluran
HH penghadaman. [1]
CC 2. Accumulation of chemical pollutants in
seawater leached from microplastics.
HH Peningkatan bahan cemar kimia dalam air laut
[1] yang larut lesap daripada mikroplastik. [1]
[1]
Compound P: Ethane Section C
Sebatian N: Etana

H H 11 (a) Metal M/Logam M: Mg/Al/Zn/Fe [1]

HCC H Number of moles of/Bilangan mol Pb(NO3)2
  100 × 0.5
H H = 1 000

= 0.05 mol [1]

[1] 1 mol oPfbP(Nb(ON3O)23)b2 erretainctdeadk to release 112 kJ heat.
1 mol balas untuk menghasilkan
(ii) Compound N will decolourise the purple colour
acidified potassium manganate(VII), while there 112 kJ haba.

is no change for the reaction with compound P. ∴ 0.05 mol Pb(NO3)2 produces/menghasilkan
112 × 0.05
Sebatian N akan menyahwarna warna ungu kalium 1 = 5.6 kJ mol–1 [1]

manganat(VII) berasid, sementara tiada perubahan Q = mcθ

bagi tindak balas dengan sebatian P. [2] 5600 = 100 × 4.2 × θ
Compound N undergoes addition reaction due to
the presence of the double bond in its structure. = 13.3 °C [1]

Compound P is a saturated compound without
double bonds. So, addition reaction cannot take
place.

•A3• Firasat SPM 2021: Chemistry – Answers

(b) Kertas Model 2

Reaction I Reaction II Paper 1

Tindak balas I Tindak balas II  1 D  2 B  3 D  4 D  5 B
 6 C  7 C  8 A  9 B 10 C
Type of Endothermic Exothermic 11 A 12 C 13 C 14 D 15 A
reaction Endotermik Eksotermik 16 A 17 B 18 B 19 C 20 B
Jenis tindak 21 B 22 B 23 A 24 B 25 D
balas 26 C 27 B 28 C 29 B 30 C
31 B 32 C 33 C 34 B 35 D
Temperature Low High 36 A 37 A 38 D 39 A 40 B
change Rendah Tinggi
Perubahan
suhu Paper 2
PENERBIT
ILMUChange in Total heat Total heat Section A
BAKTI SDN. BHD.energyenergy of energy of  1 (a) (i) V
Perubahan reactants is reactants is
suhu smaller than greater than (ii) 2.8
total heat total heat ( iii) Used in light of advertisement boards.
energy of energy of Digunakan dalam lampu papan iklan.
products products (b) From solid (X and Y) to gas (Z).
Jumlah tenaga Jumlah tenaga Daripada pepejal (X dan Y) kepada gas (Z).
 2 (a) Melting point is the temperature when solid turns into
haba bagi bahan haba bagi bahan liquid.
Takat lebur ialah suhu apabila pepejal bertukar kepada
tindak balas lebih tindak balas lebih
cecair.
kecil daripada besar daripada (b) 136 °C
(c) Solid to liquid
jumlah tenaga jumlah tenaga Pepejal kepada cecair
(d) Heat energy absorbed by the particles is used to
haba hasil tindak haba hasil tindak
overcome the attraction forces between the particles
balas balas until all the solid changes to liquid.
Tenaga haba yang diserap oleh zarah-zarah digunakan untuk
[6]
mengatasi daya tarikan antara zarah sehingga kesemua
(c) Materials: Magnesium/Zinc powder
pepejal bertukar kepada cecair.
Bahan: Serbuk magnesium/zink  3 (a) Empirical formula is the simplest whole number ratio

Apparatus: Polystyrene cup, thermometer, spatula, of elements in a compound.
Formula empirik ialah nisbah nombor bulat teringkas bagi
measuring cylinder
unsur-unsur dalam suatu sebatian.
Radas: Cawan polistirena, termometer, spatula, silinder

penyukat [2]

Procedure: (b) (i) Substance Mass (g)
Bahan Jisim (g)
Prosedur:

1. Measure 50 cm3 of copper(II) sulphate solution.

Sukat 50 cm3 larutan kuprum(II) sulfat Copper 22.4
Kuprum
2. Pour the solution into a polystyrene cup.

Tuang larutan ke dalam cawan polistirena. Oxygen
Oksigen
3. Measure the initial temperature, T1. 5.6
SAudkdatasusphuatauwlaalo, fTm1. agnesium
4. powder. (ii) Element Copper, Cu Oxygen, O
Unsur Kuprum, Cu Oksigen, O
Tambahkan satu spatula serbuk magnesium

5. Stir the mixture.

Kacau campuran. Mass (g)
Jisim (g)
6. Record the highest temperature, T2. [4] 22.4 5.6
Rekodkan suhu tertinggi, T2.
Calculation: Number of moles = 22.4 = 5.6
Bilangan mol 64 16
Pengiraan:
Mole ratio of
1. θ = T2 – T1 [1] Cu:O = 0.35 = 0.35
2. Number of moles of CuSO4 Nisbah mol Cu:O
Bilangan mol CuSO4
Simplest ratio
= 50 × 0.2 Nisbah teringkas 0.35 : 0.35
1000
(iii) CuO
= 0.01 mol [1]
[1]
3. Q = mcθ = 50 × c × θ J 1:1
[1]
4. ΔH = 50 × c × θ J mol–1
1000

© Penerbit Ilmu Bakti Sdn. Bhd. (732516-M) 2021 •A4•


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