Test Paper for Chemistry

1. SEKOLAH MENENGAH KEBANGSAAN BATU KIKIR (MODEL KHAS)
72200 BATU KIKIR
NEGERI SEMBILAN
UJIAN PENILAIAN 1 (2011)
CHEMISTRY / KIMIA
Time / Masa (1 ½ hours / jam)
Name / Nama :………………………………………………..
Form / Tingkatan :……………………………………………......
SECTION A
1. Which of the following electron arrangements has three valence electron?
Antara susunan berikut,yang manakah mempunyai tiga elektron valens?
A. C.
B. D.
2. Gas particles diffuse faster than liquid because ...
Zarah-zarah gas meresap pada kadar yang cepat berbanding cecair kerana ...
A. The particles have kinetic energy.
Zarah-zarah mengandungi tenaga kinetik.
B. The arrangement of particles in a liquid is in a fixed point.
Susunan zarah-zarah cecair adalah dalam kedudukan tetap.
C. The space between gas particles is greater than the space between liquid particles.
Ruang diantara zarah-zarah gas adalah lebih banyak berbanding cecair.
D. The space between gas particles is smaller than the space of liquid particles.
Ruang diantara zarah-zarah gas adalah lebih kecil berbanding cecair.
×
×
×
×
×
×
××
×
×
×
×
××
×
×
××

2. 3.
Figure 1
Figure 1
Gambar rajah 1
Figure 1 shows an experiment conducted with liquid bromine. What can be concluded
from the experiment?
Gambar rajah 1 menunjukkan satu eksperimen menggunakan cecair bromine.
Apakah yang dapat disimpulkan berdasarkan eksperimen ini?
I. Bromine gas diffuses into the air in the gas jar.
Gas bromine meresap kedalamudara dalam baling gas.
II. Liquid bromine combines with air to release a reddish brown gas.
Cecair bromine bergabung dengan udara untuk membebaskan gas berwarna
perang
III. Bromine gas is made up of tiny and discrete particles. It occupies the empty
spaces between air molecules.
Gas bromine terdiri daripada zarah-zarah yang kecil dan diskrit. Ia boleh
memenuhi ruang diantara molekul udara.
A. I only C. I and III only
I sahaja I dan III sahaja
B. II only D. I, II and III
II sahaja I, II and III
4. “The higher the temperature, the faster the reaction.” This statement is called ...
“Semakin meningkat suhu, semakin laju tindakbalas.” Penyataan ini dipanggil ...
A. Inference C. Problem statement
Inferens Penyataan masalah
B. Hypothesis D. Variable
Hipotesis Pembolehubah
After a few seconds
Setelah beberapa saatA drop of liquid bromine
Setitis cecair bromin
Filled with reddish brown gas
Berisi gas berwarna perang

3. 5. Figure 2 shows a model of an atom
Gambar rajah 2 dibawah menunjukkan satu model atom
Figure 2
Gambar rajah 2
Who introduced this model?
Siapakah yang memperkenalkan model ini?
A. Neils Bohr C. James Chadwick
Neils Bohr James Chadwick
B. John Dalton D. Ernest Rutherford
John Dalton Ernest Rutherford
6. Below are the characteristics of two different matter states.
Di bawah adalah ciri-ciri dua jenis keadaan jirim.
State of Matter 1
Keadaan Jirim 1
State of Matter 2
Keadaan Jirim 2
• Particles are arranged orderly,
closely and densely.
Zarah-zarah tersusun secara
rapat , teratur dan tetap.
• Particles are not able to move
freely.
Zarah tidak bebas bergerak.
• Particles are far apart from each
other.
Zarah-zarah terpisah daripada
satu sama lain.
• Particles are moving freely.
Zarah-zarah bergerak secara
rawak.
Table 1
Jadual 1
The changes of matter from state 1 to 2 is known as ...
Perubahan jirim dari keadaan 1 ke 2 dikenali sebagai ...
A. Melting C. Sublimation
Peleburan Pemejalwapan
B. Evaporation D. Condensation
Penyejatan Kondensasi
●
●
●
●

4. 7. Which of the following would describe isotopes?
Diantara penyataan dibawah yang manakah menerangkan isotop?
I. They have the same proton number but a different number of electrons.
Ia mempunyai bilangan proton yang sama tetapi bilangan electron yang
berbeza.
II. They exhibit the same chemical properties.
Ia mempunyai sifat kimia yang sama.
III. Elements exhibiting isotope have only two isotopes.
Unsur yang menmpunyai isotop hanya mempunyai dua isotop.
IV. They have the same number of protons but a different number of neutrons.
Ia mempunyai bilangan proton yang sama tetapi bilangan neutron yang
berbeza.
A. I and II only C. II and IV only
I dan II sahaja II dan IV sahaja
B. I and III only D. II, III and IV only
I dan III sahaja II, III dan IV sahaja
8. Figure 2 shows the symbol for a chlorine atom
Rajah 2 menunjukkan symbol atom klorin
Figure 3
Rajah 3
Which of the following is true based on Figure 2
Antara berikut, yang manakah benar berdasarkan symbol dalam Rajah 2
Proton number
Nombor proton
Nucleon number
Nombor nukleon
Number of electrons
Bilangan elektron
A.
B.
C.
17
17
20
37
20
37
17
17
20
3
7
Cl1
7

5. D. 37 17 37
9. Acetamide solids are heated until they melt. Which of the following graph represents
the temperature versus time graph?
Pepejal acetamida dipanaskan sehingga melebur. Antara graf yang berikut, yang
manakah, mewakili graf suhu melawan masa?
A.
B.
C.
D.
10. What is the number of moles of copper (II) sulphate in 80 g of copper (II) sulphate,
CuSO4?
Berapa bilangan mol kuprum (II) sulfat dalam 80 g, CuSO4?
[Relative atomic mass / Jisim relatif atom: O = 16, S = 32, Cu = 64]
Temperature/Suhu (O
C)
Time/Masa(s)
Temperature/Suhu (O
C)
Time/Masa(s)
Temperature/Suhu (O
C)
Time/Masa(s)
Temperature/Suhu (O
C)
Time/Masa(s)

6. A. 0.50 moles / mol C. 0.65 moles / mol
B. 0.52 moles / mol D. 0.70 moles / mol
11. Which of the following statement is false?
Antara penyataan yang berikut yang manakah tidak benar?
A. The number of electrons in an atom is equal to the number of protons.
Bilangan electron dalam suatu atom adalah sama dengan bilangan
protonnya.
B. When an atom loses one electron, it becomes an ion.
Apabila satu atom kehilangan satu electron ia menjadi ion
C. The nucleon number is the total number of protons and electrons of an atom.
Nombor nucleon adalah jumlah bilangan proton dan elektron dalam suatu
atom.
D. The proton number is the total number of proton of element.
Nombor proton adalah bilangan proton dalam ssatu elemen
12. What is the relative atomic mass of an element?
Apakah jisim relatif atom bagi sesuatu unsur?
A.
atom12carbonaofMass
elementanofatomanofMass
−
12−karbonatomJisim
unsursuatubagiatomsatuJisim
B.
atomcarbonaofMass
elementanofatomanofMass
12
12
1
−×
12
12
1
−× karbonatomJisim
unsursuatubagiatomsatuJisim
C.
atomcarbonaofMass
elementanofatomanofMass
1212 −×
1212 −× karbonatomJisim
unsursuatubagiatomsatuJisim
D.
atomcarbonaofMass
elementanofatomanofMass
12
12
1
−
×

7. 12
12
1
−
×
karbonatomJisim
unsursuatubagiatomsatuJisim
13. A waste disposal area can produce 36 dm3
of methane gas due to the activity of
microorganisms. What is the mass of methane gas produced?
[Relative atomic mass: H = 1, C = 12; 1 mole of gas occupies the volume of 24 dm3
at
room temperature and pressure]
Satu kawasan pelupusan sampah boleh menghasilkan 36 dm3
gas metana hasil
aktiviti mikroorganisma. Berapakah jisim gas metana yang dihasilkan?
[Jisim relatif atom: H = 1, C = 12; 1 mol gas menempati 24 dm3
pada keadaan bilik]
A. 16 g C. 24 g
B. 20 g D. 27 g
14. What can be deduced from the symbol X19
9 ?
Apakah yang boleh diperolehi daripada simbol X19
9 ?
I. The atom of element X has 7 valence electrons.
Atom unsure X mempunyai 7 elektron valens.
II. The atom of element X has 9 protons and 19 neutrons.
Atom unsur X mempunyai 9 proton dan 19 neutron.
III. The atom of element X has 2 shells filled with electrons.
Atom unsur X mempunyai 2 petala yang berisi electron.
IV. The atom of element X has proton number 9 and nucleon number 19.
Atom unsur X mempunyai nombor proton 9 dan nombor nukleon 19.
A. I, II and III.
I, II dan III.
B. I, II and IV.
I, II dan IV.
C. I, III and IV.
I, III dan IV.
D. I, II, III and IV
I, II. III dan IV.

8. 15. Which of the following statements is true about isotopes?
Antara penyataan yang berikut yang manakah benar mengenai isotop?
A. They have the same chemical properties and physical properties.
Ia mempunyai sifat kimia dan sifat fizikal yang sama.
B. They have the different chemical properties and physical properties.
Ia mempunyai sifat kimia dan sifat fizikal yang berbeza.
C. They have the different chemical properties but same physical properties.
Ia mempunyai sifat kimia yang berbeza tetapi sifat fizikal yang sama.
D. They have the same chemical properties but different physical properties.
Ia mempunyai sifat kimia yang sama tetapi sifat fizikal yang berbeza.
16. Figure 4 shows the molecular structure of a molecule of paracetamol, a medicine used
to relieve pain and fever.
Rajah 4 menujukkan struktur molekul paracetamol, sejenis ubat yang digunakan
untuk mengurangkan kesakitan dan demam panas.
H
H O H
C C
C C N C C H
C C H
H O C H
H
Figure 4
Rajah 4
A pill contains 1.2 × 1021
paracetamol molecules. Calculate the mass of paracetamol
in the pill .
[Relative atomic mass: H = 1, C = 12]
Satu pil mengandungi 1.2 × 1021
molekul paracetamol. Kirakan jisim pil paracetamol
itu.
[Jisim relatif atom: H = 1, C = 12]

9. 17. A compound with formula X2CO3 has a relative formula mass of 106. What is the
relative atomic mass of X?
[Relative atomic mass: O = 16, C = 12]
Satu sebatian berformula X2CO3 mempunyai jisim formula relative 106. Apakah jisim
atom relatif bagi X?
[Jisim relatif atom: O = 16, C = 12]
A. 23 C. 40
B. 39 D. 69
18. Table 2 shows the relative atomic mass of element R and T.
Jadual 2 menunjukkan jisim relative atom bagi unsur R dan T.
Table 2
Jadual 2
Which of the following is true about the atoms of element R and T?
Antara penyataan yang berikut yang manakah benar mengenai unsur R dan T?
A. The mass of 1 atom of T is 16.
Jisim 1 atom T adalah 16.
B. The number of protons in atom R is 64.
Nombor proton bagi atom R adalah 64.
C. 4 moles of T have the same mass as 1 mole of R.
4 mol T mempunyai jisim yang sama dengan 1 mol R.
D. The density of 1 atom of R is four times more than that of an atom of T.
Ketumpatan 1 atom R adalah empat kali lebih daripada atom T.
Element
Unsur
Relative atomic mass
Jisim relatif atom
R 64
T 16

10. 19. X gram of aluminium has three times more atoms than 1.38g of sodium. What is the
value of X?
[Relative atomic mass: Na = 23, Al = 23]
X gram aluminium mempunyai tiga kali ganda lebih atom berbandin 1.38g natrium.
Apakah nilai X?
[Jisim relatif atom: Na = 23, Al = 23]
A. 0.54 g C. 3.53 g
B. 1.62 g D. 4.86 g
20. Which of the following contains 1.505 × 1023
atoms?
[Relative atomic mass: Mg = 24 Ca = 40; Avogadro’s Constant = 6.02 × 1023
]
Antara berikut yang mankah mengandungi 1.505 × 1023
atom?
[Jisim relatif atom: Mg = 24, Ca = 24]
A. 5 g Calcium C. 12 g Magnesium
5 g Kalsium 12 g Magnesium
B. 10 g Calcium D. 24 g Magnesium
10 g Kalsium 24 g Magnesium
SECTION B
1. Table 1 shows the proton number and nucleon number of six particles P, Q, R, S, T
and U.
Jadual 1 menunjukkan nombor proton dan nombor nucleon bagi enam zarah P, Q, R,
S.T dan U.
Element
Unsur
Proton number
Nombor proton
Nucleon number
Nombor nukleon
Electron arrangement
Susunan elektron
P 6 12
Q 11 23
R 8 16
S 6 14
T 15 31

11. U 19 39
Table 1
Jadual 1
a) Write the electron arrangement of each particle.
Nyatakan susunan electron bagi setiap zarah.
[2 marks / markah]
b) What is the number of valence electrons in particle R?
Apakah bilangan electron valens dalam zarah R?
[1 mark / markah]
c) Draw the atomic structure of T
Lukis struktur atom T.
[2 marks / markah]
d) Explain the meaning of nucleon number.
Terangkan maksud nombor nucleon.
[1 mark / markah]
e) What is the number of neutrons in U?
Apakah nombor neutron dalam U?

12. [1 mark / markah]
f) i) Explain the meaning of the term “isotope”.
Terangkan maksud istilah “isotop”.
[1 mark / markah]
ii) Which of the elements in Table 1 is a pair of isotopes?
Antara unsur-unsur dalam Jadual 1yang manakah mewakili sepasang isotop?
[1 mark / markah]
2. Compare the three states of matter in terms of particle arrangements, forces of
attraction between the particles, kinetic energy of particles and types of motion of
particle.
Bandingkan tiga keadaan jirim dari aspek susunan zarah, daya tarikan diantara
zarah, kandungan tenaga kinetik zarah dan pergerakan zarah.
[13 marks / markah]
SECTION C
An experiment is carried out to determine the freezing point of naphthalene. Solid
naphthalene is heated in a water bath until it melts completely.
The initial temperature is recorded.
The molten naphthalene is left to cool.
The reading of the temperature is recorded every 30 seconds.
Figure 1 shows the recorded temperature reading every 30 seconds.

13. Satu eksperimen dijalankan untuk menentukan takat beku naftalena. Pepejal naftalena
dipanaskan didalam kukus air sehingga melebur dengan lengkap.
Suhu awal direkodkan.
Leburan naftalena dibiarkan menyejuk.
Bacaan suhu direkodkan setiap 30 saat.
Rajah 1 menunjukkan bacaan termometer yang direkodkan pada sela 30 saat.
Initial temperature : Temperature at 30 s :
Suhu awal : Suhu pada 30 s :

14. Temperature at 60 s : Temperature at 90 s :
Suhu pada 90 s : Suhu pada 90 s :
Temperature at 120 s : Temperature at 150 s :
Suhu pada 120 s : Suhu pada 150 s :

15. Temperature at 180 s : Temperature at 210 s :
Suhu pada 180 s : Suhu pada 210 s :
Figure 1
Rajah 1
a) Record the temperatures in the spaces provided in Figure 1.
Catatkan suhu pada ruang yang disediakan dalam Rajah 1.
[3 marks / markah]
b) On the graph paper, draw the graph of temperature against time for the cooling of
naphthalene.
Pada kertas graf, lukiskan graf suhu melawan masa bagi penyejukkan naftalena.
[3 marks / markah]
c) i) Use the graph in (b), to determine the freezing point of naphthalene.
Show on the graph paper how you determine the freezing point of naphthalene.
Gunakan graf di (b), untuk menentukan takat beku naftalena.
Tunjukkan pada graf bagaimana anda menentukan takat beku ini.
[3 marks / markah]

16. ii) How does the graph in (b) show the freezing point of naphthalene.
Bagaimankah graf di (b) dapat menunjukkan takat beku naftalena.
[3 marks / markah]
d) The temperature of the naphthalene did not change from the 90th
second until the 50th
second during the cooling process.
Explain why.
Suhu naftalena tidak berubah dari saat ke 90 sehingga saat ke 150 semasa proses
penyejukan itu.
Terangkan mengapa.
[3 marks / markah]
e) On the graph paper sketch a curve you would expect if the molten naphthalene is
cooled quickly.
Pada kertas graf lakarkan lengkung yang anda jangkakan itu jika naftalena lebur itu
disejukkan dengan cepat.
[3 marks / markah]
Prepared by / Disediakan oleh: Checked by / Disemak oleh:

17. ................................................. ..............................................
(Cik Theesha a/p Thituvengidam) (Pn. Rusmanisah Bt. Mohd. Nadzri)
Verified by / Disahkan oleh:
.................................................
(Pn. Anita Bt. Shaari)
Answer Scheme
SECTION A
1. C 11. C
2. C 12. B
3. C 13. C
4. B 14. C
5. A 15. D

18. 6. C 16.
7. C 17. A
8. A 18. C
9. B 19. D
10. A 20. B
SECTION B
1. (a) P: 2.4
Q: 2.8.1
R: 2.6
S: 2.4
T: 2.8.5
(b) 6
(c)
(d) Nucleon number is the total number of protons and neutrons in the nucleus of
the atom.
×
×
×
×
× ×
× ×
× ×
×
×
××
×

19. (e) 39 – 19 = 20 neutrons
(f) (i) Isotopes are atoms of the same element having the same proton
number but different nucleon number / neutron number.
(ii) P and S
(g) Q and U because each has one valence electron
2.
State of matter Solid Liquid Gas
Particles
arrangement
The particles are packed
closely together in an
orderly manner
The particles are less
closely packed but not in
an orderly arrangement
The particles are
further apart from
each other.
Particles
movement
Particles can only vibrate
and rotate about their fix
positions.
Particles are attracted by
very strong forces.
Particles are attracted
by moderately strong
forces.
Attractive
forces between
the particles
Particles are attracted by
a very strong forces
between the particles
Particles are held
together by strong forces
but weaker than the
forces in solid /
(moderately)
The attraction forces
between particles
are weak forces
Energy content
of particles
Very low energy Moderately high energy. Very high energy

20. SECTION C
a)
b) -Title
-Axis labelled with unit and proper scale
-Properly plotted graph
c) i) 80°C
ii) There is no temperature change during the cooling process.
d) The heat released during the formation of bonds balances the heat lost to the
surrounding
e)
Time (s) 0 30 60 90 120 150 180 210
Temperature (° C) 95 85 82 80 80 80 75 70