kimia f4 2010 p1
Transcript of kimia f4 2010 p1
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SEK. MEN. KEB. ULU BERNAM
PEPERIKSAAN AKHIR TAHUN 2010
KIMIA TINGKATAN 4
Kertas 1
1 jam Satu jam lima belas minit
Arahan : Bagi soalan1 hingga 50, tiap-tiap soalan diikuti oleh empatpilihan jawapan A, B, Cdan D . Pilih satu jawapan yang terbaik bagi tiap-tiap soalan dan hitamkan ruangan
yang sepadan pada kertas jawapan objektif anda.
1 The elements in the Periodic Table of Elements is arranged based on the increasing ofUnsur-unsur dalam Jadual Berkala Unsur disusun mengikut pertambahan
A the number of shell
bilangan petalaB the neutron number
bilangan neutronC the proton number
bilangan proton
D the number of electron
bilangan elektron
2. Which one of the following substances consists of atoms?
Antara bahan berikut yang manakah terdiri daripada atom-atom?
A Solid sodium chloridePepejal natrium klorida
B Carbon dioxide gas
Gas karbon dioksidaC neon gas
Gas neonD Water
Air
3. Which of the following substances contains ions that move freely?
Antara bahan berikut yang manakah mengandungi ion-ion yang bergerak bebas?
A Lead(II) bromide molten
Leburan plumbum(II) bromidaB Sodium chloride powder
Pepejal natrium kloridaC Ethanoic acid glacial
Asid etanoik glasialD Ethanol
Etanol
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4. The chemical which ionises partially in water to produce hydrogen ions is
Bahan kimia yang mengion separa lengkap dalam air untuk membebaskan ion hidrogen
ialah
A strong acid
asid kuatB weak acid
asid lemahC strong alkali
alkali kuatD weak alkali
alkali lemah
5. Which of the following solution, dissolved in water and will produce a solution that have
a pH value below than 7?
Antara bahan berikut yang manakah apabila dilarutkan dalam air membentuk larutan
yang mempunyai nilai pH kurang daripada 7?
A Ethanol
EtanolB Ammonia
AmmoniaC Sulphur trioxide
Sulfur trioksida
D Sodium chloride
Natrium klorida
6 Which of the following is NOT TRUE about composite?Antara berikut yang manakah BUKAN bahan komposit?
A Glass
Kaca B Superconductor
Superkonduktor C Photochomic glass
Kaca Fotokromik D Plastic that have been proved by glass
Plastik yang diperkukuhkan dengan kaca
7 Which of the following catalyst is used in the Haber process?
Antara mangkin berikutyang manakah digunakan dalam proses Haber?
A Nicke l C Platinum
Nikel P
B Iron D Vanadium(V) oxide
Ferum Vanadium(V) oksida
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8. Which of the following is the ionic equation for the reaction between hydrochloric acid
with sodium hydroxide solution?
Antara berikut yang manakah persamaan ion bagi tindak balas antara larutan asidhidroklorik dengan larutan natrium hidroksida?
A H+(ak) + Cl-(ak) + Na+(ak) + OH-(ak) NaCl(ak) + H2O(ce)
B HCl(ak) + NaOH(ak) NaCl(ak) + H2O(ce)C Na+(ak) + Cl-(ak) NaCl(ak)
D H+(ak) + OH-(ak) H2O(ce)
9. The following table shows the proton number of four elements P, Q, R and S.
Jadual berikut menunjukkan nombor proton bagi empat atom unsurP, Q, Rdan S.
Element
Unsur
Proton number
Nombor proton
P 4
Q 9
R 11
S 17
Which of the following pairs of elements is located in the same group? Antarapasangan unsur berikut, yang manakah berada dalam kumpulan yang sama?
A P andQP dan Q
B Q and S
Q dan S
C P and Q
P dan Q
D R and S
Rdan S
10. Which of the following gas has double covalent bond between the particles?
Proton number is given; H=1, C=6, N=7, O=8, Ne=10
Antara gas berikut yang manakah mempunyai ikatan kovalen gandadua di antara zarah-zarahnya?
Diberi nombor proton ; H=1, C=6, N=7, O=8, Ne=10
A Neon
NeonB Nitrogen
NitrogenC Hydrogen
HidrogenD Carbon dioxide
Karbon dioksida
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11. The diagram shows a set-up of apparatus of electrolysis of hydrochloric acid.
Gambar rajah menunjukkan susunan radas bagi elektrolisis larutan asid hidroklorik
cair.
What is formed at cathode?Apakah yang terbentuk di katod?
A Chlorine gas
Gas klorin B Oxigen gas
Gas oksigen C Hydrogen gas
Gas hidrogen D Hydrogen chloride gas
Gas hidrogen klorida
12. Which of the following solution has the highest PH value ?
Antara larutan berikut yang manakah mempunyai nilai pH paling tinggi?
A Nitric acid 0.1 mol dm-3
Asid nitrik0.1 mol dm-3
B Ethanoic acid 0.1 mol dm-3
Asid etanoik0.1 mol dm-3
C Ammonia aqueus 0.1 mol dm-3
Ammonia akueus 0.1 mol dm-3
D Sodium hydroxide solution 0.1 mol dm-3
Larutan natrium hidroksida 0.1 mol dm-3
13. Figure shows an atomic symbol for element X
Rajah menunjukkan simbol atom unsur X
4
X27
13
Carbon
Karbon
Dilute hydrochloric acid
Asid hidroklorik cair
Carbon
Karbon
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Nucleus of X atom contains
Nukleus atom X mengandungi
A 13 proton and 14 neutron
13 proton dan 14 neutronB 13 neutron and 14 proton
13 neutron dan 14 protonC 13 electron and 14 proton
13 elektron dan 14 protonD 13 proton and 27 neutron
13 proton dan 27 neutron
14. A compound of formulae R2SO4 has a relative atomic mass is 142. What is the relative
atomic mass for R?
Satu sebatian berformula R2 SO4 mempunyai jisim formula relatif 142.Berapakah jisim atom relatif bagi R?
Relative atomic mass S= 32 and O = 16
Gunakan maklumat jisim atom relatif S=32 dan O=16
A 23
B 27
C 39
D 85.5
15. A vertical row in Periodic Table is called a group. What is the similarity between
elements in the same group?
Turus menegak dalam Jadual Berkala Unsur dinamakan kumpulan. Apakah persamaanantara unsur-unsur dalam kumpulan yang sama?
A number of proton
Bilangan protonB number of neutron
Bilangan neutronC number of shell of electron
Bilangan petala electronD number of valence electron
Bilangan elektron valens
16. The following table shows the proton number of atom of element X and Y.Jadual berikut menunjukkan nombor proton bagi atom unsurX dan Y.
Element
Unsur
Proton number
Nombor proton
X
Y
13
8
5
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What is the formula of the compound formed when element X is combined with element
Y?
Apakah formula sebatian yang terbentuk apabila unsur X berpadu dengan unsur Y?
A XY
B XY3
C X3Y2D X2Y3
17. The diagram shows a set-up of apparatus to investigate the reaction between sodium
metal and water.
Gambar rajah menunjukkan susunan radas untuk mengkaji tindak balas antara logamnatrium dengan air.
Sodium metal
Logam natrium
Which of the following is true about the above experiment?
Antara berikut yang manakah yang manakah benar bagi eksperimen di atas?
A Alkali solution is formed
Larutan beralkali terbentukB Acidic solution is formed
Larutan berasid terbentuk
C Salt solution is formedLarutan garam terbentuk
D Neutral solution formed
Larutan bersifat neutral
18 The formula of a compound isMN3.Formula bagi suatu sebatian ialahMN3.
Which of the following diagrams of electron arrangement is true for the atom of element
M and N?
Antara gambar rajah susunan elektron berikut yang manakah benar bagi atom unsurM
danN?
M N
A
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Water
Air
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B
C
D
19 The diagram shows a set-up of apparatus of a chemical cell.
Gambar rajah menunjukkan susunan radas bagi suatu sel kimia.
Beaker X Beaker Y BikarX BikarY
Which of the following occurs after a few minutes?
Antara berikut yang manakah berlaku selepas beberapa minit?
A Siver rod become thinner
Rod argentum menjadi lebih nipisB The number of silver ion, Ag+ in the beaker X increases
Bilangan ion argentum, Ag+ dalam bikarX bertambahC Electron flows from copper rod to silver rod through the outer curcuit
Elektron mengalir dari rod kuprum ke rod argentum melalui litar luarD The intensity of the blue of the copper(II) sulphate solution in beaker Y decreases
Keamatan warna biru larutan kuprum(II)sulfat dalam bikarY berkurang
20. Which of the following ionic pairs have the same number of electrons
Antara pasangan ion berikut yang manakah mempunyai bilangan elektron yang sama?
[Proton number : Na, 11 ; Mg, 12 ; Cl, 17 ; K, 19 ; Ca, 20]
[Nombor proton : Na, 11 ; Mg, 12 ; Cl, 17 ; K, 19 ; Ca, 20]
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Copper(II) nitrate solution
Larutan kuprum(II) nitrat
Silver nitrate solution
Larutan argentum nitrat
Copper rod
Rod kuprum
Silver rod
Rod argentum
Salt bridge
Titian garam
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A K+ and Cl-
K+ dan Cl-
B Ca2+ and Mg2+
Ca2+ dan Mg2+
C Na+ and cl-
Na+ dan Cl-
D K+ and Na+
K+ dan Na+
21. Solid X is heated as in the following diagram.
Pepejal X dipanaskan seperti dalam rajah berikut
The soda lime water becomes milky and the solid X changes from green to black.
Solid X is
Air kapur menjadi keruh dan pepejalXyang berwarna hijau bertukar menjadi hitam.
PepejalX ialah
A Copper(II) carbonate
kuprum(II) karbonat
B Iron(III) chloride
ferum(III) kloridaC Calcium carbonate
kalsium karbonat
D Iron(II) sulphate
ferum(II)sulfat
22. Figure shows a chemical reaction for making fertiliser
Rajah menunjukkan tindakbalas kimia untuk pembuatan baja
Which of the following statements represent the compound X
Antara berikut yang manakah merupakan sebataian X
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Sulphuric acidAsid sulfurikAmmonia
Ammonia
Compound X
(fertilizer)
Sebatian X(baja)
Heat
Panaskan
Solid X
Pepejal XSoda lime water
Air kapur
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A Urea
UreaB Superphosphate
SuperfosfatC Ammonium sulphate
Ammonium sulfatD Ammonium phosphate
Ammonium fosfat
23. Figure shows the steps in producing sulphuric acid through contact process
Rajah menunjukkan langkah untuk penghasilan asid sulfurik melalui proses sentuh
Which of the following substances that used in process I, II, III and IV?
Antara berikut, bahan manakah yang digunakan dalam proses I,II,III dan IV ?
Process I
Proses I
Process II
Proses II
Process III
Proses III
Process IV
Proses IV
A Oxygen
Oksigen
Water
Air
Oxygen
Oksigen
Concentrated
sulphuric acid
Asid sulfurik pekat
B Oxygen
Oksigen
Concentrated
sulphuric acid
Asid sulfurik pekat
Water
Air
Oxygen
Oksigen
C Oxygen
OksigenOxygen
OksigenWater
AirConcentrated
sulphuric acid
Asid sulfurik pekat
D Oxygen
Oksigen
Oxygen
Oksigen
Concentrated
sulphuric acid
Asid sulfurik pekat
Water
Air
24. Large molecule that contain repeated molecule unit are called
Molekul besar yang mengandungi unit molekul ulangan disebut
A polimer C polimonomer
Polymer Polymonomer B monomer D makromolekul
mononer Macromolecul
Level II Level III Level IV
Sulfu ioksida Sulfur trioksida Oleum Asid sulfurik
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Level 1
Peringkat I
Peringkat II Peringkat III Peringkat IV
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25. Table shows an information about glass X
Jadual menunjukkan maklumat tentang kaca X
Composition
Komposisi
Charateristics
Sifat
Uses
Kegunaan
Silicon dioxide,
Sodium carbonate andcalcium carbonate
Silikon dioksida,Natrium karbonat dan
Kalsium karbonat
Low melting point,
fragile and notwithstand heat
Takat leburrendah,
Mudah pecah danTidak tahan haba
Window glass
and electricalbulb glass
Kaca tingkap danKaca mentol
Which of the following is the glass X?
Antara berikut yang manakah merupakan kaca X ?
A Lead glass
Kaca plumbum
B Borosilicate glassKaca borosilikat
C Soda-lime glass
Kaca soda kapur D Kaca silica terlakur
26. Figure shows a percentage of metal mixture to make a spoon Y
Rajah menunjukkan peratus campuran logam untuk membuat sudu Y
Which of the following are advantages of spoon Y characteristic than metal spoon?
Antara berikut yang manakah kelebihan sifat sudu Y berbanding sudu besi ?
I Harder
Lebih kerasII Softer
Lebih ringanIII withstand rusting
Lebih tahan karatIV Higher electrical resistance
Lebih tinggi rintangan elektrik
A I only C II and IV only
I sahaja II dan IV sahaja
B I and III only D III and IV only
I dan III sahaja III dan IV sahaja27. Molecular formula for methane is as followed:
Metal =70% Chromium = 20% Nickel = 10%
Besi =70% Kromium=20% Nikel=10%
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Formula molekul bagi metana adalah seperti berikut:
Which of the following statements are true for one mole methane gas?Antara pernyataan berikut yang manakah benar bagi satu mol gas metana?
Use the information Relative Atomic Mass C = 12, H = 1, Avogadro constants =
6.0 1023 mol- 1, 1 mol gas= 24.0 dm3 at room condition.
Gunakan maklumat jisim atom relatif C = 12, H = 1, pemalar Avogadro = 6.0 1023
mol-1,1 mol gas menempati 24.0 dm3pada suhu dan tekanan bilik.
A Has mass 12g
Mempunyai jisim 12 g
B Contain 5 6 1023 atomMengandungi 5 6 1023 atom
C Contain 5 6 1023 molecule
Mengandungi 5 6 1023 molekul
D Contain 12dm3 at s.t.p
Mempunyai isipadu 12dm3pada suhu dan tekanan bilik
28. Which of the following is a salt ?
Antara berikut, yang manakah merupakan garam?
A
B
C
D
Lead (II) oxide
Plumbum(II) oksida
Barium hydroxide
Barium hidroksida
Aluminium nitrate
Aluminium nitrat
Hydrogen sulphate
Hidrogen sulfat
11
CH4
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29. Figure below shows volume and concentration of potassium hydroxide solution and
propanoic acid
Rajah menunjukkan isipadu dan kepekatan bagi larutan kalium hidroksida dan asidpropanoik
which of the following statements are true for both solution?
Antara pernyataan berikut yang manakah benar bagi kedua-dua larutan itu?
30. Which of the following are true for the reaction that occur in Contact Process?
Antara berikut yang manakah merupakan tindak balas yang berlaku dalam Proses
Sentuh?
Potassium hydroxide solution
Larutan kalium hidroksida
Ethanoic acid
Asid etanoik
A Weak alkaliAlkali lemah
Weak acidAsid lemah
B Low pH value
Nilai pH rendah
High pH value
Nilai pH tinggi
C High degree of ionization
Darjah pengionan tinggi
Low degree of ionization
Darjah pengionan rendah
B Low concentration of hydroxide ion
Kepekatan ion hidroksida rendahLow concebtration of hydrogen ion
Kepekatan ion hidrogen rendah
12
50cm3 potassium
hydroxide solution
0.1moldm-350cm3 ethanoic
acid
0.1moldm-3
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A The formation of sulphur dioxide from the burning of sulphur
Pembentukan sulfur dioksida melalui pembakaran sulfurB the reaction between sulphur and access of air will produce sulphuric acid
Tindak balas sulfur dioksida dengan udara berlebihan menghasilkan asidsulfurik
C the reaction between sulphur dioxide and concentrated sulphuric acid to produceoleum
Tindak balas antara sulfur dioksida dengan asid sulfurik pekat untukmenghasilkan oleum
D The dilution of oleum to sulphuric acid by using vanadium(V) oksida catalysed
Pencairan oleum kepada asid sulfurik dengan menggunakan mangkin vanadium(V)
oksida
31. Which of the following daily uses that not from chemical investigation?
Antara bahan-bahan kegunaan harian berikut yang manakah tidak diusahakan melaluikajian kimia?
A Plastic beg
Beg plastikB medicine
Ubat-ubatanC cotton
Kapaspembalut lukaD detergents
Bahan-bahan pencuci
32. Figure below shows the set-up of apparatus for dilution process of sodium hydroxide
solutionGambar rajah menunjukkan susunan radas bagi proses pencairan larutan natriumhidroksida
What is the concentration of sodium hydroxide now?
Berapakah kepekatan larutan natrium hidroksida yang baru?A 0.01 mol dm-3
B 0.10 mol dm-3
C 0.11 mol dm-3
D 0.12 mol dm-3
33. Figure below shows the symbol of atom in element M
Rajah menunjukkan simbol atom unsur M
13
180 cm3 distilledwater added
air suling ditambah 20 cm3 sodium hydroxide solution 1.0mol dm-3
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27
M
13
What is the type of bonding that forms when element M combines with oxygen element?
Use the information number of proton O = 16
Apakah jenis ikatan yang terbentuk apabila unsur M berpadu dengan unsur oksigen?
Gunakan maklumat nombor proton O = 16.
A ionic bonding
Ikatan ion
B single covalent bonding
Ikatan kovalen tunggal
C double covalent bonding
Ikatan kovalen ganda dua
D triplet covalent bonding
Ikatan kovalen ganda tiga
34. Figure below shows particles substances Z in state I changes to state II
Rajah menunjukkan zarah-zarah bahan Z dalam keadaan I berubah kepada keadaanII
Particles
zarah
State I state IIWhich of the following statements are true?
Antara pernyataan berikut yang manakah benar?I Sulimation process substances Z occur
Proses pemejalwapan bahan Z berlaku
II kinetic energy particles Z decreased
Tenaga kinetik zarah-zarah Z menjadi berkurang
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III Forces energy between particles Z decreased
Daya tarikan antara zarah-zarah bahan Z menjadi berkurang
IV Substances Z changes from solid to liquid states
Bahan X berubah dari keadaan pepejal kepada keadaan cecair
A I dan III onlyI dan III sahaja
B II dan IV only
II dan IV sahajaC II dan III only
II dan III sahaja
D I, II dan IV only
I, II dan IV sahaja
35. Which of the following is a strong acid?
Antara yang berikut, yang manakah asid kuat?
A
B
C
D
Alkyl sulphonic acid
Asid Alkil sulfonik
Ethanoic acid
Asid etanoik
Palmitic acid
Asid palmitik
Nitric acid
Asid nitrik
36. The body of an aeroplane is made up of alloy X.
Badan sebuah kapalterbang dibina dari sejenis aloi X.
What is the alloy X?Apakah aloi X itu?
A
B
C
D
Pewter
PiuterBrass
LoyangBronze
GangsaDuralumin
Duralumin
37. Which of the following is true about the charges of an electron, a neutron and a proton?
Antara yang berikut, yang manakah benar tentang cas-cas bagi elektron, neutron dan proton?
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A
B
C
D
38. Which of the following pair of compounds and formulae is correct?
Antara berikut, yang manakah pasangan sebatian dan fomulanya betul?
A
B
C
D
Compound Formula Sebatian Formula
Sodium sulphate NaSO4
Natrium sulfat
Copper(II) oxide Cu2O
Kuprum(II) oksida
Iron(III) chloride FeCl3Ferum(III) klorida
Zinc nitrate Zn(NO2)3Zink nitrat
39 Table 1 shows the proton number of elements W,X,Y and Z.
The letters used are not the actual symbol of the elements.
Jadual 1 menunjukkan nombor proton bagi unsur-unsur W,X,Y ,dan Z.
Huruf yang digunakan bukan simbol sebenar unsur itu.
TABLE 1
JADUAL 1Which of the following shows the ascending order of the atomic size of the elements?
Antara ynag berikut yang manakah menunjukkan susunan menaik saiz atom bagi unsur-unsur
itu?
16
Element
Unsur
Proton number
Nombor proton
W
XY
Z
11
1317
19
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A
B
C
D
W,X,Y,Z
Z,W,X,Y
Y,X,W,Z
Z,Y,X,W
40. Which of the following is true about covalent compound?
Antara berikut, yang manakah benar tentang sebatian kovalen?
A
B
C
D
Conduct electricity in molten or aqueous state
Mengalir elektrik dalam keadaan lebur atau akueus
Low melting point
Takat lebur rendah
Soluble in water
Larut dalam air
Not volatile
Tidak meruap
41 Diagram 8 shows a set up of chemical cell using a pair of zinc and copper as electrodes.
Rajah 8 menunjukkan susunan radas sel kimia menggunakan pasangan elektrod zink dan
kuprum.
DIAGRAM 8
RAJAH 8
The blue copper(II) sulphate solution turns pale.
Warna biru larutan kuprum(II) sulfat luntur
Which of the following explains the observation?Antara pernyataan berikut yang manakah menerangkan pemerhatian itu?
A
B
Zinc atom ionizes
Atom zink mengionCopper atom ionizes
Atom kuprum mengionSulphate ion is discharged
17
Copper(II) sulphate solution
Larutan kuprum(II) sulfat
Zinc
ZinkCopperkuprum
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C
D
Ion sulfat dinyahscas
Copper(II) ion is discharged
Ion kuprum(II) dinyahcas
Copper(II) ion is discharged
Ion kuprum(II) dinyahcas
42
Which of the following explains the above statement?
Antara berikut, yang manakah menerangkan pernyataan di atas?
A
B
C
D
Hydrochloric acid is a weak acid while ethanoic acid is a strong acid
Asid hidroklorik ialah asid lemah sementara asid etanoik ialah asid kuat
Hydrochloric acid dissociates partially while ethanoic acid dissociates completely in
water
Asid hidroklorik bercerai separa sementara asid etanoik bercerai sempurna di dalamair
The number of hydrogen atom in hydrochloric acid is smaller than in ethanoic acid
Bilangan atom hidrogen di dalam asid hidroklorik lebih kecil berbanding di dalam asid
etanoik
The concentration of hydrogen ion in hydrochloric acid is higher than in ethanoic acid
Kepekatan ion hidrogen di dalam asid hidroklorik adalah lebih tinggi berbanding didalam asid etanoik
43 The following equation shows the preparation of salt R.
Persamaan berikut menunjukkan penyediaan garam R
Solution P + Solution Q Solid R + Solution S
LarutanP + Larutan Q PepejalR + LarutanS
Which of the following set represents compound P,Q,R and S?
Antara set berikut, yang manakah merupakan sebatian P,Q,R dan S?P Q R S
I Pb NaBr PbBr 2 Na
II Ca(NO)3 K2SO4 CaSO4 KNO3III AgNO3 NaCl AgCl NaNO3IV NH4OH HCl NH4Cl H2O
A I and II only
I dan II sahaja
18
The pH value of 0.1 mol dm-3 hydrochloric acid,HCl is smaller than
the pH value of 0.1 mol dm-3 ethanoic acid, CH3COOH
Nilai pH bagi 0.1 mol dm -3 asid hidroklorik, HCl adalah lebih kecil berbandingdengan nilai pH bagi 0.1 mol dm-3 asid etanoik, CH3COOH
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B I and IV only
I dan IV sahaja
C II and III only
II and III sahaja
D III and IV only
III and IV sahaja
44. The manufacturing of sulfuric acid involves several reactions.
Pembuatan asid sulfurik melibatkan beberapa tindak balas.
Which of the following equations represents the sulfuric acid reaction that uses a catalyst?Antara persamaan berikut, yang manakah mewakili tindak balas asid sulfurik yang
menggunakan mangkin?
A
B
C
D
S + O2 SO2
2SO2 + O2 2SO3
SO3 + H2SO4 H2S2O7
H2S2O7 + H2 O 2H2SO4
45 Bromine-79 has 44 neutrons.
Bromin-79 mempunyai 44 neutron
Which of the following symbols represent the bromine atom?
Antara simbol berikut, yang manakah mewakili atom bromin?
A
B
C
D
19
35
79
35Br
44
Br35
79
44Br
79
Br
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46.
What is the empirical formula of metal oxide J?
Apakah formula empirik bagi oksida logam J?
[Relative atomic mass of J = 24, O = 16 ][Jisim atom relatif: J = 24, O = 16 ]
A
B
C
D
JO
JO2
J2O
J2O2
47. In the Periodic Table, element X is in group 1 and element Y is in group 17
The letters used are not the actual symbol of the elements.
Dalam Jadual Berkala Unsur, unsur X berada dalam kumpulan I dan unsur Y berada dalamkumpulan 17.Huruf yang digunakan bukan simbol sebenar unsur itu.
Which of the following chemical equation is true for the reaction between element X and element
Y?
Antara persamaan kimia berikut, yang manakah benar bagi tindak balas antara unsur X danunsur Y?A
B
C
D
2X + Y2 2XY
X + Y2 XY22X + Y X2Y
X + Y XY
48. The table 2 shows the electron arrangements of elements R, S, T dan U.
Jadual 2 menunjukkan susunan elektron bagi unsur R, S, T dan U
Which of the following pair of elements can form ionic compound?
Antara pasangan unsur berikut, yang manakah boleh membentuk sebatian ion?A
B
C
D
R and S
R dan S
S and U
S dan U
T and U
T dan U
R and T
20
2.0 g metal oxide J contains 1.2 g of element J
2.0 g oksida logam J mengandungi 1.2 g logam J
Elements
UnsurR S T U
Electron arrangement
Susunan elektron2.4 2.8 2.8.7 2.8.8.2
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R dan T
49. Calculate the percentage of nitrogen in ammonium nitrat, NH4NO3Hitungkan peratus kandungan nitrogen dalam ammonium nitrat, NH4NO3.
Given that the relative atomic mass of H = 1, N = 14, O = 16
Diberi bahawajJisim atom relatif H = 1, N = 14, O = 16
A
B
C
D
34.5
35.0
35.453.0
50. Table 5 shows the proton number for elements P, Q, R and S.
The letter used are not the actual symbol of the elements.
Jadual 5 menunjukkan nombor proton bagi unsur P, Q, R dan SHuruf-huruf yang digunakan bukan simbol sebenar unsur itu.
Element
Unsur
Proton number
Nombor proton
P
Q
R
S
T
8
9
13
19
20
TABLE 5
JADUAL 5
Which of following pair of ions has the same number of electrons?
Antara pasangan ion yang berikut, yang manakah mempunyai bilangan elektron yang sama?
A
B
C
D
P+ and R-
P+ dan R-
R3+and P2-
R3+dan P2-
T2+ and Q-
T2+ dan Q-
T2+ and P2-
T2+ dan P2-
21
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