PAPER 1 QUESTION SPMRSM KIMIA 2017 6 APRIL 5.00 PM

(1)

Chemistry

Paper 1

Ogos

2017

1 ¼ hours

SIJIL PENDIDIKAN

MAKTAB RENDAH SAINS MARA

2017

CHEMISTRY

KIMIA

Paper 1

Kertas 1

One hour and fifteen minutes

Satu jam dan lima belas minit

DO NOT OPEN THE QUESTION BOOKLET UNTIL BEING TOLD TO DO SO

JANGAN BUKA BUKU SOALAN SEHINGGA DIBERITAHU

1 This question booklet is bilingual.

Kertas soalan ini adalah dalam dwibahasa.

2 Candidates are required to read the information at the last page of this question

booklet.

Calon dikehendaki membaca maklumat di halaman belakang kertas soalan.

(2)

1 Which substance exists as an atom?

Bahan manakah wujud sebagai atom?

A

Air

2 Diagram 1 shows the set-up of apparatus for an experiment to determine the

empirical formula of magnesium oxide.

Rajah 1 menunjukkan susunan radas bagi satu eksperimen untuk menentukan formula empirik magnesium oksida.

Why the crucible lid is opened once in a while during the experiment?

Mengapakah penutup mangkuk pijar dibuka sekali sekala semasa eksperimen?

A

To avoid explosion

Untuk mengelakkan letupan

B

To cool the magnesium

Untuk menyejukkan magnesium

C

To see what happen inside the crucible

Untuk melihat apa yang berlaku di dalam mangkuk pijar

D

To allow oxygen gas to enter the crucible

Untuk membenarkan gas oksigen masuk ke dalam mangkuk pijar

(3)

3 Which anion present in copper(II) sulphate solution?

Anion manakah yang hadir dalam larutan kuprum(II) sulfat?

A

SO4

2-B

Cu

2+

_{, H}

+

C

OH

-

_{, SO4}

2-D

Cu

2+

_{, SO4}

2-

_{, H}

+

_{, OH}

-4

Why are weather balloons filled with helium gas instead of hydrogen gas?

Mengapakah belon kaji cuaca diisi dengan gas helium berbanding gas hidrogen?

A

Helium is unreactive

Helium tidak reaktif

B

Helium is easily found in air

Helium mudah ditemui dalam udara

C

Helium is lighter than hydrogen

Helium lebih ringan daripada hidrogen

D

Helium is less dense than hydrogen

Helium kurang tumpat daripada hidrogen

5 Which compound is formed by sharing electrons?

Sebatian manakah yang terbentuk melalui perkongsian elektron?

A

Methane, CH4

Metana, CH4

B

Sodium oxide, Na2O

Natrium oksida, Na2O

C

Lithium chloride, LiCl

Litium klorida, LiCl

D

Calcium hydroxide, Ca(OH)2

Kalsium hidroksida, Ca(OH)2

(4)

Rajah 2 menunjukkan susunan radas suatu sel elektrolisis.

Diagram 2

Rajah 2

Which of the following is substance P?

Antara yang berikut, yang manakah bahan P?

A

Ethyl ethanoate, CH3COOC2H5

Etil etanoat, CH3COOC2H5

B

Glucose solution, C6H12O6

Larutan glukosa, C6H12O6

C

Chloromethane, CH3Cl

Klorometana, CH3Cl

D

Ethanoic acid, CH3COOH

Asid etanoik, CH3COOH

7 Why ammonia solution is a weak alkali?

Mengapakah larutan ammonia adalah alkali lemah?

A

Has high pH value

Mempunyai nilai pH yang tinggi

B

Ionises partially in water

Mengion separa dalam air

C

Contains a lot of ammonium ions

Mengandungi banyak ion ammonium

D

Produces high concentration of hydroxide ions in the water

Menghasilkan kepekatan ion hidroksida yang tinggi di dalam air

8 Which of the following substances are monoprotic acid?

Antara bahan-bahan berikut,yang manakah merupakan asid monoprotik?

I Hydrochloric acid

Bulb lights up

Mentol menyala

Substance P

(5)

Asid hidroklorik

9 Diagram 3 shows the apparatus set-up for the preparation of a salt.

Rajah 3 menunjukkan susunan radas bagi penyediaan suatu garam.

Diagram 3

Rajah 3

Which salt is prepared through this method?

Garam manakah yang disediakan melalui kaedah ini?

A

Zinc sulphate

10 The following are the uses of substance Q in industries.

Maklumat berikut adalah kegunaan bahan Q dalam industri.



To remove the surface oxide layer on metals in

(6)

11 Diagram 4 shows a cookware which is coated with teflon or also known as

polytetrafluoroethene, PTFE.

What is the monomer of teflon?

Rajah 4 menunjukkan peralatan memasak yang disaluti dengan teflon atau dikenali juga sebagai politetrafloroetena, PTFE.

12 Which statement is true about both methanol and ethanol?

Antara pernyataan berikut yang manakah benar mengenai metanol dan etanol?

A

Both have different functional groups

Kedua-duanya mempunyai kumpulan berfungsi berbeza

(7)

B

Both show similar physical properties

Kedua-duanya menunjukkan sifat fizikal yang sama

C

Both show different chemical properties

Kedua-duanya menunjukkan sifat kimia yang berbeza

D

Both have same general formula

Kedua-duanya mempunyai formula am yang sama

13 Which of the following is

not

a correct unit for the rate of reaction?

Unit manakah yang tidak betul untuk kadar tindakbalas?

A

g s

-1

B

g dm

-3

C

mol s

-1

D

cm

3

_min

-1

14 Diagram 5 shows a fruit that contains compound R which gives its fruity smell.

Rajah 5 menunjukkan buah yang mengandungi sebatian R yang memberikannya bau buah-buahan.

Diagram 5

Rajah 5

What is the homologous series of compound R?

Apakah siri homolog bagi sebatian R?

A

Ester

Ester

B

Alkene

Alkena

C

Alcohol

Alkohol

D

Carboxylic acid

Asid karboksilik

(8)

B

Hydrogen sulphide loses its hydrogen

Hidrogen sulfida kehilangan hidrogen

C

Iron(II) ion converted to iron(III) ion

Ion ferum(II) bertukar kepada ion ferum(III)

D

A magnesium atom loses two electrons

Atom magnesium kehilangan dua elektron

16 Aluminium atom undergoes oxidation to form ion by donating three electrons.

What is the oxidation number of aluminium in the ion formed?

Atom aluminium mengalami pengoksidaan membentuk ion dengan menderma tiga elektron.

Apakah nombor pengoksidaan aluminium bagi ion yang terbentuk?

A

-3

B

0 C

+2

D

+3

17 Which of the following process or reaction absorbs heat?

Antara proses atau tindak balas berikut, yang manakah menyerap haba?

A

Boiling of water

Pendidihan air

B

Freezing of liquid sulphur

Pembekuan cecair sulfur

C

Reaction between hydrogen and nitrogen

Tindabalas antara hidrogen dan nitrogen

D

Reaction between zinc and hydrochloric acid

Tindak balas antara zink dan asid hidroklorik

18 Diagram 6 shows the part of labelling on the food packaging.

Rajah 6 menunjukkan bahagian berlabel pada pembungkus makanan.

(9)

Diagram 6

Rajah 6

What is the type of food additive added to make sure that the food last longer

until the expiry date?

Apakah jenis bahan tambah makanan yang ditambah untuk memastikan makanan tersebut dapat bertahan sehingga tarikh luput?

A

Stabilizers

Penstabil

B

Flavourings

Perisa

C

Antioxidants

Antioksidan

D

Preservatives

Pengawet

19 Diagram 7 shows the apparatus set-up to determine the heat of precipitation for

magnesium carbonate, MgCO3.

(10)

Diagram 7

Rajah 7

Which of the following is correct about the reaction?

Antara yang berikut, yang manakah betul bagi tindak balas tersebut?

A

Heat is absorbed from the surroundings

Haba diserap dari persekitaran

B

Heat is released and the container become hot

Haba dibebaskan dan bekas menjadi panas

C

Total energy content of the reactant is higher than total energy content of

the product

Jumlah kandungan tenaga bahan tindak balas adalah lebih tinggi daripada jumlah kandungan tenaga hasil tindak balas

D

Heat absorbed during the broken of the bond is lower than heat released

during the formation of bond

Haba diserap semasa pemutusan ikatan adalah lebih rendah daripada haba dibebaskan semasa pembentukan ikatan

20 Which of the following is correct about properties of isotopes?

Antara berikut, yang manakah betul tentang ciri-ciri isotop?

(11)

Mempunyai sifat fizikal yang berbeza

C

Have the same number of neutrons in an atom

Mempunyai bilangan neutron yang sama di dalam atom

D

Have the same nucleon number

Mempunyai nombor nukleon yang sama

22 The following equation represents a chemical reaction involving gas J and L.

Persamaan berikut mewakili tindak balas kimia melibatkan gas J dan L.

J2 (g) + L2 (g)



2 JL (g)

What is the ratio of volume of product to volume of reactants at the same

temperature and pressure?

Apakah nisbah isipadu hasil tindak balas kepada isipadu bahan tindak balas pada suhu dan tekanan yang sama?

A

1 : 2

B

1 : 1

C

2 : 1

D

4 : 2

23 Table 1 shows the result when three oxides of elements in period 3 are added to

potassium hydroxide solution, KOH and hydrochloric acid, HCl.

(12)

Oxide

Oksida Ditambah dengan KOH

Added to KOH

Ditambah dengan HCl

Added to HCl

Oxide of P

Oksida R Tindak balas berlaku

Reaction occurs

Tiada tindak balas

No reaction

Table 1

Jadual 1

Arrange the elements P, Q, R in ascending order of their electronegativity.

Susun unsur P, Q, R dalam tertib menaik keeletronegatifan.

A

P, Q, R

B

R, P, Q

C

Q, P, R

D

Q, R, P

24 Atom G has 6 electrons while atom L has 17 electrons.

What is the chemical formula of the compound formed between G and L?

Atom G mempunyai 6 elektron manakala atom L mempunyai 17 elektron. Apakah formula kimia bagi sebatian yang terbentuk antara G dan L?

A

GL2

B

GL4

C

G2L

D

G4L

25 Diagram 8 shows an incomplete apparatus set-up of an electrolytic cell.

Rajah 8 menunjukkan susunan radas yang tidak lengkap bagi suatu sel elektrolisis.

(13)

Diagram 8

Rajah 8

Which of the following shows the correct observation at T when the solution has

been electrolyzed for 10 minutes?

Antara berikut, yang manakah menunjukkan pemerhatian yang betul pada T apabila larutan dielektrolisiskan selama 10 minit?

(14)

26 Diagram 9 shows the electron arrangement of magnesium ion with nucleon

number 24.

Rajah 9 menunjukkan susunan elektron ion magnesium dengan nombor nukleon 24.

Diagram 9

Rajah 9

Which of the following shows the electron arrangement and the number of

neutrons in magnesium atom?

Antara yang berikut, yang manakah menunjukkan susunan elektron dan bilangan neutron dalam atom magnesium?

Which statement is true about acid U?

Nilai pH bagi asid U 0.1 mol dm-3_{adalah 1.}

Pernyataan manakah adalah benar tentang asid U?

A

Slightly soluble in water

Larut sedikit dalam air

B

Reacts only with a weak alkali

Hanya bertindak balas dengan alkali lemah

C

The degree of ionization in water is high

Darjah pengionan dalam air adalah tinggi

D

Has a low concentration of hydrogen ions

Mempunyai kepekatan ion hidrogen yang rendah

28 Diagram 10 shows four processes involving chromium(II) oxide, CrO.

Rajah 10 menunjukkan empat proses yang melibatkan kromium(II) oksida, CrO.

(15)

Diagram 10

Rajah 10

Which of the following statements are correct about the processes undergoes by

chromium(II) oxide?

Antara penyataan berikut, yang manakah betul mengenai proses-proses yang dilalui oleh kromium(II) oksida?

I Chromium(II) oxide undergoes reduction in process M

Kromium(II) oksida mengalami penurunan dalam proses M

II Chromium(II) oxide undergoes oxidation in process K

Kromium(II) oksida mengalami pengoksidaan dalam proses K

III Oxidation number of chromium increases from +2 to +6 in process N

Nombor pengoksidaan kromium meningkat dari +2 kepada +6 dalam

proses N

IV Oxidation number of chromium decreases from +2 to 0 in process L

Nombor pengoksidaan kromium menurun dari +2 kepada 0 dalam

proses L

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

(16)

Jadual 2 menunjukkan nilai pH apabila ammonia dilarutkan dalam dua pelarut berbeza.

Table 2

Jadual 2

Which statement explains the difference in pH value?

Pernyataan manakah menerangkan perbezaan nilai pH?

A

Ammonia molecules ionised in Set II

Molekul-molekul ammonia mengion dalam Set II

B

Ammonia molecules dissolved in solvent E

Moleku-molekul ammonia melarut dalam pelarut E

C

Solvent E is water and solvent F is methylbenzene

Pelarut E ialah air dan pelarut F ialah metilbenzena

D

Concentration of hydroxide ion in Set I is higher

Kepekatan ion hidroksida dalam Set I adalah lebih tinggi

Set

Solvent

_Pelarut

pH value

_{Nilai pH}

I

_{Ammonia dalam pelarut E}

Ammonia in solvent E

7

(17)

30 Diagram 11 shows a device V made up of stainless steel and ceramics.

Rajah 11 menunjukkan alat V yang diperbuat daripada keluli tahan karat dan seramik.

Diagram 11

Rajah 11

What are the important properties of the materials used in making device V?

Apakah ciri-ciri penting bahan-bahan yang digunakan dalam pembuatan alat V?

I High heat resistant

Tahan haba yang tinggi

II Has shiny surface

Mempunyai permukaan berkilat

III Resistant to rusting

Tahan karat

IV Strong and hard

Kuat dan keras

A

I and III

I dan III

B

I and IV

I dan IV

C

II and III

II dan III

D

II and IV

(18)

known as plaster of Paris in medicinal field.

Rajah 12 menunjukkan kegunaan garam kalsium sulfat hemihidrat dikenali sebagai plaster Paris dalam bidang perubatan.

Diagram 12

Rajah 12

Which substances can be used to produce this salt?

Bahan manakah boleh digunakan untuk menghasilkan garam ini?

A

Calcium + sulphuric acid

Kalsium + asid sulfurik

B

Calcium oxide + sodium sulphate

Kalsium oksida + natrium sulfat

C

Calcium nitrate + potassium sulphate

Kalsium nitrat + kalium sulfat

D

Calcium carbonate + magnesium sulphate

Kalsium karbonat + magnesium sulfat

32 Substance U is produced in industrial process. It can react with barium hydroxide

solution to form a white pigment used in paint.

Which of the following is the equation involved in the manufacture of substance U?

Bahan U dihasilkan dalam proses industri. Ianya boleh bertindak balas dengan larutan barium hidroksida untuk menghasilkan pigmen putih yang digunakan dalam cat.

Antara persamaan berikut, yang manakah terlibat dalam penghasilan bahan U?

A

N2 + 3 H2



2 NH3

B

2 NH3 + H2SO4



(NH4)2SO4

C

H2S2O7 + H2O



2 H2SO4

D

Ba(OH)2 + H2SO4



BaSO4 + 2 H2O

33 Diagram 13 shows the apparatus set-up used to determine the rate of reaction.

Rajah 13 menunjukkan susunan radas bagi menentukan kadar tindak balas.

(19)

Diagram 13

Rajah 13

Which of the following chemical reaction is not suitable to determine the rate of

reaction by using the apparatus set-up?

Antara tindak balas berikut, yang manakah tidak sesuai bagi penentuan kadar tindak balas menggunakan susunan radas tersebut?

A

CaCO3 + 2 HCl



CaCl2 + H2O + CO2

B

NaHCO3 + HNO3



NaNO3 + H2O + CO2

C

Mg + 2 CH3COOH



Mg(CH3COO)2 + H2

D

ZnO + H2SO4



ZnSO4 + H2O

34 Diagram 14 shows two processes involving compound W.

Rajah 14 menunjukkan dua proses melibatkan sebatian W.

Compound U

Sebatian U

Compound V

Sebatian V

Reaction mixture

Campuran tindak balas

(20)



Decolourised

Proses I Process IIProses II



Has carboxyl

Which structural formula represents compound W?

Formula struktur yang manakah yang mewakili sebatian W?

A

H

35 Which of the following diagram shows an endothermic reaction?

Antara rajah berikut, yang manakah menunjukkan suatu tindak balas endotermik?

(21)

A

B

C

(22)

37 The equation represents the reduction reaction of acidified potassium

Apakah nilai bagi x, y and z?

x

y

z

Rajah 15 menunjukkan formula struktur etil butanoat yang terdapat di dalam nenas.

H

O

H

C

O

C

H

Diagram 15

Rajah 15

0.004 mol of ethyl butanoate has a mass of 0.464 g.

Which pair of information is correct about ethyl butanoate?

0.004 mol etil butanoat mempunyai jisim 0.464 g.

(23)

D

8

3

2

38 Table 3 shows the nucleon number and the number of neutrons for atoms of

elements S, T, U and V.

Jadual 3 menunjukkan nombor nukleon dan bilangan neutron bagi atom unsur S, T, U dan V.

Atom

Nucleon number

Nombor nukleon

Number of neutrons

Bilangan neutron

S

1

0 T

16

8 U

35

18 V

40

22 Table 3

Jadual 3

Which element will reacts with an alkali metal to produce a white solid that

dissolved in water to form a colourless solution with pH 7.

Unsur manakah yang bertindak balas dengan logam alkali untuk menghasilkan pepejal putih yang larut dalam air membentuk larutan tidak berwarna dengan pH 7.

A

V

B

U

C

T

(24)

39 Diagram 16 shows a flow chart for the formation of compound Q from the

reaction between element P and element R.

Rajah 16 menunjukkan carta alir pembentukan sebatian Q daripada tindak balas antara unsur P dan unsur R..

Diagram 16

Rajah 16

Which of the following is correct about element P, element R and compound Q?

Antara yang berikut, yang manakah betul bagi unsur P, unsur R dan sebatian Q?

Electron arrangement

Susunan elektron

Type of bond in compound Q

Jenis ikatan dalam sebatian Q

Element P

Unsur P

Element R

Unsur R

A

1

2.8.7 Covalent

_Kovalen

B

2.8.8.1

2.6 Ionic

_Ion

C

2.8.1

2.8.7 Ionic

_Ion

D

2.4

2.6 Covalent

_Kovalen

+ water

air

Element P + Element R

Unsur P Unsur R

Compound Q

Sebatian Q



Can conduct electicity

Boleh mengalirkan elektrik

(25)

40 Sulphuric acid is one of the important chemical used in tin mining. It is also a

by-product of the mine when mixed with water to form acidic waste. In a titration,

the chemist found that 25 cm

3

_{of 0.2 mol dm}

-3

_{potassium hydroxide solution}

neutralised 25 cm

3

_{of acidic waste.}

What is the concentration of the acidic waste?

Asid sulfurik adalah salah satu bahan kimia penting yang digunakan dalam perlombongan timah. Ia juga adalah bahan sampingan perlombongan apabila bercampur dengan air membentuk air kumbahan berasid. Dalam suatu pentitratan, seorang ahli kimia mendapati 25 cm3_{larutan kalium hidroksida 0.2 mol dm}-3 meneutralkan 25 cm3_{air kumbahan berasid.}

Apakah kepekatan air kumbahan berasid tersebut?

A

0.1 mol dm

-3

B

0.2 mol dm

-3

C

1.0 mol dm

-3

D

2.0 mol dm

-3

41 Diagram 17 shows the apparatus set up to electroplate iron spoon with copper.

Rajah 17 menunjukkan susunan radas bagi penyaduran sudu besi dengan kuprum.

Diagram 17

Rajah 17

After one hour, it is found that the iron spoon is not electroplated.

What should be done to ensure electroplating takes place?

Selepas satu jam, didapati sudu besi tidak disadurkan.

Apakah yang perlu dilakukan untuk memastikan penyaduran berlaku?

A

Use a bigger iron spoon

Gunakan sudu besi yang besar

B

Interchange the terminal in the cell

Saling tukar terminal pada sel

C

Use copper(II) nitrate solution as electrolyte

Gunakan larutan kuprum(II) nitrat sebagai elektrolit

(26)

D

Increase the concentration of copper(II) sulphate solution

Tambah kepekatan larutan kuprum(II) sulfat

42 Diagram 18 shows how Ali prepares a syrup solution during the activity week at

his school.

Rajah 18 menunjukkan bagaimana Ali menyediakan larutan sirap semasa minggu aktiviti di sekolahnya.

Diagram 18

Rajah 18

By using the prepared syrup solution, Ali has to make a new syrup solution to be

given to six groups of students. Each group must receive 0.5 litre of solution.

What is the concentration of the syrup solution received by each group?

[1 litre = 1 dm

3

_{, relative molecular mass of sugar = 342]}

Dengan menggunakan larutan sirap yang disediakan, Ali perlu menyediakan larutan sirap yang baru untuk diedarkan kepada enam kumpulan pelajar. Setiap kumpulan mesti menerima 0.5 liter larutan.

Apakah kepekatan larutan sirap yang diterima oleh setiap kumpulan?

[1 liter = 1 dm3_{, jisim molekul relatif gula = 342}_]

A

0.487 mol dm

-3

B

1.949 mol dm

-3

C

2.924 mol dm

-3

D

11.696 mo ldm

-3

2 litre of water

2 liter air

2 kg of sugar

(27)

43 The following equation shows the displacement of metal Q from its salt solution.

Persamaan berikut menunjukkan penyesaran logam Q daripada larutan garamnya.

P + Q(NO3)2  P(NO3)2 + Q

What are metal P and metal Q?

Apakah logam P dan logam Q?

P

Q

44 The following chemical equation shows the reaction between copper(II) oxide and

nitric acid.

Persamaan kimia berikut menunjukkan tindak balas antara kuprum(II) oksida dan asid nitrik.

CuO + 2 HNO3



Cu(NO3)2 + 2 H2O

If 10 g of copper(II) oxide powder is added to 50 cm

3

_{of 2 mol dm}

-3

_{nitric acid,}

calculate the mass of unreacted copper(II) oxide.

[Relative formula mass of CuO = 80]

Sekiranya 10 g serbuk kuprum(II) oksida ditambahkan kepada 50 cm3_{larutan asid nitrik} 2 mol dm-3_{, hitung jisim kuprum(II) oksida yang tidak bertindak balas.}

[Jisim formula relatif CuO = 80]

A

2 g

B

4 g

C

5 g

(28)

45 Table 4 shows two sets of reaction between metals and salt solutions.

Jadual 4 menunjukkan dua set tindak balas antara logam dan larutan garam.

Set

Set Bahan-bahan

Substances

Observation

Pemerhatian

1

Larutan biru bertukar kepada tidak berwarna

Colourless solution turns to blue

Larutan tidak berwarna bertukar kepada biru

Table 4

Jadual 4

Which of the following statements are true about the confirmatory test of the ions

present in solution formed in both set?

Antara penyataan-penyataan berikut yang manakah benar tentang kehadiran ion-ion dalam larutan yang terbentuk dalam kedua-dua set?

I White precipitate is formed and insoluble when ammonia solution is added in

excess to the solution formed in Set I

Mendakan putih terbentuk dan tidak larut apabila larutan ammonia berlebihan ditambah kepada larutan dalam Set I

II Blue precipitate is formed and insoluble when excess ammonia solution is

added to the solution formed in Set II

Mendakan biru terbentuk dan tidak larut apabila larutan ammonia berlebihan ditambah kepada larutan dalam Set II

III White precipitate is formed when lead(II) nitrate solution is added to the

solution formed in Set I

Mendakan putih terbentuk apabila larutan plumbum(II) nitrat ditambah kepada larutan dalam Set I

(29)

Energy

Tenaga

46 Diagram 19 shows the energy profile diagram for a reaction.

Rajah 19 menunjukkan gambar rajah profil tenaga bagi suatu tindak balas.

S + T



V + W

Diagram 19

Rajah 19

What is the value of the activation energy for this reaction?

Apakah nilai tenaga pengaktifan untuk tindak balas ini?

A

150 kJ

B

95 kJ

C

55 kJ

D

15 kJ

95 kJ

(30)

47 Table 5 shows the condition of reactants used in Experiment I, II and III.

Jadual 5 menunjukkan keadaan bahan tindak balas yang digunakan dalam Eksperimen I, II dan III.

Graph 1 shows the result of the experiments.

Graf 1 menunjukkan keputusan eksperimen tersebut.

Graph 1

Graf 1

What is condition W used in Experiment III to obtain the curve III as shown in

Graph 1?

Apakah keadaan W yang digunakan dalam Eksperimen III bagi memperoleh lengkung III seperti yang ditunjukkan dalam Graf 1?

A

Excess Mg powder + 100 cm

3

_{of 2.0 mol dm}

-3

_{HCl solution}

Serbuk Mg berlebihan + 100 cm3 _{larutan HCl 2.0 mol dm}-3

B

Excess Mg powder + 25 cm

3

_{of 4.0 mol dm}

-3

_{HCl solution}

Serbuk Mg berlebihan + 25 cm3_{larutan HCl 4.0 mol dm}-3

C

Excess Mg powder + 25 cm

3

_{of 2.0 mol dm}

-3

_{H2SO4 solution}

(31)

Serbuk Mg berlebihan + 25 cm3_{larutan H}

2SO4 2.0 mol dm-3

D

Excess Mg powder + 50 cm

3

_{of 2.0 mol dm}

-3

_{H2SO4 solution}

Serbuk Mg berlebihan + 50 cm3_{larutan H}

2SO4 2.0 mol dm-3

48 The following chemical equation shows a combustion reaction of propane, C3H8.

Persamaan kimia berikut menunjukkan tindak balas pembakaran propana, C3H8.

C3H8 + 5O2



3CO2 + 4H2O

What is the mass of propane needed to produce 550 cm

3

_{of carbon dioxide gas at}

room condition?

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

[Molar volume of gas at room condition = 24 dm

3

_mol

-1

_]

Apakah jisim propana yang diperlukan bagi menghasilkan 550 cm3_{gas karbon dioksida} pada keadaan bilik?

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

[

Isipadu molar gas pada keadaan bilik = 24 dm

3

_mol

-1

_]

A

336.112 g

B

22.917 g

C

1.008 g

(32)

49 Diagram 20 shows a type of chemical cell.

Rajah 20 menunjukkan sejenis sel kimia.

Diagram 20

Rajah 20

Electricity is generated when the following reaction occurs:

Elektrik dihasilkan apabila tindak balas berikut berlaku:

Zn + 2 MnO2



ZnO + Mn2O3

Which of the following is the correct change in the oxidation number of zinc and

manganese?

(33)

50 Diagram 21 shows the apparatus set-up for the reaction between 50 cm

3

of 1.0 mol dm

-3

_{copper(II) sulphate solution with excess magnesium powder.}

Rajah 21 menunjukkan susunan radas bagi tindak balas antara 50 cm3_larutan kuprum(II) sulfat 1.0 mol dm-3_{dengan serbuk magnesium berlebihan.}

Diagram 21

Rajah 21

105 kJ of heat is released when 1 mol of the metal is displaced.

What is the temperature change of the mixture?

[Specific heat capacity of a solution = 4.2 Jg

-1o

_C

-1

_{, density of solution = 1g cm}

-3

_]

105 kJ haba dibebaskan apabila 1 mol logam disesarkan.

Berapakah perubahan suhu bagi campuran itu?

[Muatan haba tentu larutan = 4.2 Jg

-1o_C-1_{, ketumpatan larutan = 1g cm}-3

_]

A

2.5

o

_C

B

5.0

o

_C

C

12.5

o

_C

D

25.0

o

_C

END OF QUESTION PAPER

KERTAS SOALAN TAMAT

50 cm

3

_{of 1.0 mol dm}

-3

copper(II) sulphate solution

50 cm3_{larutan kuprum(II) sulfat} 1.0 mol dm-3

(34)