kimia p1 sbp mid year spm 2008
TRANSCRIPT
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
1/44
SULIT
SULIT 4541/11
SULIT 4541/1
4541/1
Kimia
Kertas 1
Mei
20081 jam
BAHAGIAN SEKOLAH
KEMENTERIAN PELAJARAN MALAYSIA
______________________________________________
PEPERIKSAAN PERTENGAHAN TAHUN 2008
TINGKATAN 5
KIMIA
Kertas 1
Satu jam lima belas minit
JANGAN BUKA KERTAS SOALAN INI HINGGA DIBERITAHU
1. Kertas soalan ini mengandungi 50 soalan.
2. Jawab semua soalan
3. Jawab dengan menghitamkan ruangan yang betul pada kertas jawapan4. Bagi setiap soalan hitamkan satu ruangan sahaja
5. Sekiranya anda hendak menukar jawapan, padamkan tanda yang telah dibuat.
Kemudian hitamkan jawapan yang baru.
6. Rajah yang mengiringi soalan tidak dilukiskan mengikut skala.
7. Anda dibenarkan menggunakan kalkulator saintifik yang tidak boleh
diprogramkan.
Kertas soalan ini mengandungi 23 halaman bercetak
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
2/44
SULIT
SULIT 4541/12
INFORMATION FOR CANDIDATES
1 This question paper consists of 50 questions.
2 Answer all questions.
3 Answer each question by blackening the correct space on the answer sheet.
4 Blacken only one space for each question.
5 If you wish to change your answer, erase the blackened mark that you have made. Then
blacken the space for the new answer.
6 The diagrams in the questions provided are not drawn to scale unless stated.
7 You may use a non-programmable scientific calculator.
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
3/44
SULIT
SULIT 4541/13
1 After making observations, a chemist should try to
A collect data
B make inference
C make hypothesis
D identify problems
2 The diagram shows a model of an atom.
Who introduced this model?
A Neils Bohr
B J.J Thomson
C James Chadwick
D Ernest Rutherford
3 What is the relative molecular mass of hydrated magnesium sulphate,
MgSO4.7H2O?[Relative atomic mass: Mg, 24; S,32; O,16; H,1]
A 145
B 246
C 305
D 356
Electron
Nucleus that contains
proton and neutrons
Shell
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
4/44
SULIT
SULIT 4541/14
4 The table shows the properties of element Q.
Which of the following elements is Q?
A Sodium
B Helium
C Argon
D Silver
5 The table shows the electron arrangement for elements M, N, P and Q.
Element Electron arrangement
M 2.4
N 2.8.2
P 2.6
Q 2.8.7
Which of the following elements react to form an ionic compound?
A M and P
B P and QC M and Q
D P and N
6 The diagram shows the electrolysis of molten lead(II) bromide using carbon
electrodes.
What are the products at the anode and the cathode?
Anode Cathode
A Bromine Lead
B Oxygen Hydrogen
C Bromine Hydrogen
D Oxygen Lead
Element Properties
Q Non-flammable
Used as carrier gas in gas-liquid chromatography
Filled in electric light bulbs
heat
Carbon
Lead(II) bromide
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
5/44
SULIT
SULIT 4541/15
7 Which of the following is a weak alkali?
A Lithium hydroxide
B Aqueous ammonia
C Cooper(II) hydroxide
D Potassium hydroxide
8 Which of the following salts is prepared through precipitation process?
A Lead(II) chromate(VI)
B Ammonium chloride
C Potassium carbonate
D Barium chloride
9 The diagram shows the formation of ammonia through Haber process.
Which of the following represent catalyst X, temperature Y and pressure Z?
Catalyst X Temperature Y,oC Pressure Z / atm
A Vanadium(V) oxide 550 200
B Platinum 450 100
C Iron 200 450
D Iron 450 200
10 Which of the following is the meaning of activation energy?
A The maximum energy that the particles need to produce effective
collision
B The amount of energy used by the particles during a collision
C The amount of kinetic energy of molecules during a collision
D The minimum amount of energy that particles must have in order to
react
Hydrogen Nitrogen
Catalyst X
Temperature Y
Pressure Z
Ammonia
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
6/44
SULIT
SULIT 4541/16
11 Which of the following structural formulae shows an unsaturated hydrocarbon?
12 The diagram shows the atomic symbol of element X.
X
Which of the following is true about the sub-atomic particles of element X?
Proton Number Number of neutron Number of electron
A 7 7 10
B 7 7 7
C 3 4 3
D 3 4 2
A
B
C
D
7
3
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
7/44
SULIT
SULIT 4541/17
13 What is the number of oxygen atom in 0.1 mole of water?
[Avogadro constant: 6.02 x 1023
mol-1
]
A 6.02 x 1022
B 6.02 x 1023
C 60.2 x 1023D 3.01 x 10
23
14 X is an element that has the following properties;
Soft solid
Reacts with cold water to form alkaline solution
Store in paraffin oil
Among elements A, B, C and D in the Periodic Table of elements, which element
represent X?
15 The diagram shows the electron arrangement of a compound formed between
atoms P and Q.
Which of the following statements is true about the compound?
A There is strong intermolecular force between particles P and Q
B The compound is formed by sharing the electrons
C The compound conduct electricity in molten state
D It is an covalent compound
2-2+
QP
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
8/44
SULIT
SULIT 4541/18
16 The diagram shows the set-up of the apparatus used to electrolyses
0.1 mol dm-3
of copper(II) chloride solution by using carbon electrodes.
What is observed at the anode?
A Colourless gas bubbles released
B Greenish yellow gas evolvedC Brown solution produced
D Brown solid deposited
17 Which of the following equations shows the neutralization process?
I CuO + H2SO4 CuSO4 + H2O
II Zn + 2HCl ZnCl2 + H2III NH3 + HNO3 NH4NO3IV CaCO3 + H2SO4 CaSO4 + H2O + CO2
A I only
B II and IV only
C I and III only
D I, II and IV only
18 Which of the following ions form a white precipitate that does not dissolves in
excess sodium hydroxide solution but no change occur in aqueous ammonia
solution?
A Mg2+
B Pb2+
C Ca2+
D Al3+
Copper(II) chloride
solution
Carbon
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
9/44
SULIT
SULIT 4541/19
19 The diagram shows the lead crystal glass.
What are the major components used in the making of lead crystal glass?
A Copper(II) oxide and lead(II) oxideB Aluminium silicate and silicon dioxide
C Silicon dioxide and lead(II) oxide
D Iron(III) oxide and boron oxide
20 Chemical equation shows the reaction between zinc and sulphuric acid.
Which of the following factors increases the rate of reaction?
A Increases of volume of sulphuric acid
B Use of lower concentration of sulphuric acid
C Addition of small amount of copper(II) sulphate
D Use bigger size of zinc
21 The diagram shows the cooking gas cylinder.
Which of the following gasses is filled in the gas cylinder?
A Methane
B Ethene
C PropeneD Butane
H2SO4(aq) + Zn(s) ZnSO4(aq) + H2(g)
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
10/44
SULIT
SULIT 4541/110
22 The graph shows the cooling curve of acetamide.
Which of the following statements are true about the particles in acetamide from S
to V?
I Heat energy is released by particles
II The kinetic energy of the particles increase
III The particle are closer to one another
IV The movement of the particles becomes slower
A I and III only
B III and IV only
C II, III and IV only
D I, III and IV only
23 The chemical equation shows the burning process of ethene in excess air.
What is the maximum volume of carbon dioxide gas evolved when 0.5 mole of
ethene burns completely?
[1 mole of gas occupied 24 dm3
at room temperature and pressure]
A 12 dm3
B 24 dm3
C 36 dm3
D 48 dm3
Temperature/oC
V
UT
S
Time/ s
C2H4(g) + 3O2 2CO2(g) + 2H2O(l)
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
11/44
SULIT
SULIT 4541/111
24 The diagram shows the structure of atoms Q and R.
Which of the following is true about atoms Q and R?
A Q exists as a diatomic molecule
B Q and R have the same chemical properties
C R reacts with Q to form an ionic compound
D Q reacts with water to release hydrogen
25 The electron arrangement of atom J is 2.6 and atom G has 4 valence electrons.
What type of bond and the chemical formula of the compound formed between
atoms J and G?
Type of bond Chemical formula
A Ion JG2B Ion GJ2C Covalent GJ2D Covalent JG2
26 The diagram shows the set-up of apparatus for the electrolysis of silver nitrate
solution.
What is formed at the cathode?
A Silver atoms
B Oxygen gas
C Hydrogen gas
D Silver ions
Atom RAtom Q
Silver
Silver nitrate solution
Silver
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
12/44
SULIT
SULIT 4541/112
27 The distilled water is added to 20 cm3
of 1.0 mol dm-3
sodium hydroxide solution
to produce 250 cm3
of sodium hydroxide solution.
What is the concentration of the sodium hydroxide solution produced?
A 0.02 mol dm-3
B 0.04 mol dm-3
C 0.06 mol dm-3
D 0.08 mol dm-3
28 Ammonium sulphate is used as a chemical fertilizer. This fertilizer can be
prepared in the laboratory through the reaction between
A aqueous of ammonia solution and dilute sulphuric acid
B aqueous of ammonia solution and sulphur dioxide
C ammonia gas and sulphur and oxygen
D ammonia gas and sulphur trioxide
29 The diagram shows the arrangement of atoms in steel.
What is X?
A Tin
B Zinc
C Carbon
D Copper
Iron atom
X atom
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
13/44
SULIT
SULIT 4541/113
30 The graph shows the maximum volume of carbon dioxide gas evolved when
calcium carbonate react with hydrochloric acid.
What is the rate of reaction at 120 s?
A 0.00 cm3
s-1
B 0.15 cm3
s-1
C 0.29 cm3
s-1
D 0.35 cm3
s-1
31
What could be the organic compounds X and Y, Catalyst and Process A in the
diagram?
Compound X Compound
Y
Catalyst Process A
A Ethene Ethanol Phosphoric acid Oxidation
B Ethane Ethene Nickel Hydrogenation
C Ethane Ethene Nickel Oxidation
D Ethene Ethanol Phosphoric acid Hydrogenation
Volume of CO2 gas/ cm3
Time/ s
35
120
Steam/CatalystCompound YCompound X
Process A Acidified potassium
dichromate (VI)
CH3COOH
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
14/44
SULIT
SULIT 4541/114
32 The table shows the melting point and boiling point for substances P, Q, R
and S.
Substance Melting point/oC Boiling point/
oC
P 79 108
Q -180 -120R -95 69
S -160 -90
Which of the substances exists as a liquid at room temperature?
A Q
B R
C S
D P
33 The equation shows the reaction of the extraction of iron from iron(III) oxide.
What is the mass of iron which can be extracted from 10.0 g of iron(III) oxide?
[Relative atomic mass: Fe,56; O,16]
A 3.5 g
B 4.5 g
C 6.0 g
D 7.0 g
34 The table shows the proton number for element M and N. Element N is more
electronegative than element M because
Element Proton number
M 8
N 9
A atomic size of N is smaller
B atom N releases electrons easierC atom N has less valence electron
D atom N has larger number of neutron
2Fe2O3 4Fe + 3O2
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
15/44
SULIT
SULIT 4541/115
35 The diagram shows the information of elements X and Y
Which of the following is the diagram of electron arrangement for the compound
formed when element X reacts with element Y?
16
Y
8
7
X
3
A
C
B
D
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
16/44
SULIT
SULIT 4541/116
36 The diagram shows the voltaic cell.
Which of the following half-equations represent the reaction at the negative
terminal and positive terminal?
Negative Terminal Positive terminal
A Mg Mg2+ + 2e Cu2+ + 2e Cu
B Mg2+
+ 2e Mg Cu Cu2+
+ 2e
C Cu2+
+ 2e Cu Mg Mg2+
+ 2e
D Cu Cu2+
+ 2e Mg2+
+ 2e Mg
37 Which of the following solutions has the highest concentration of hydrogen ion?
A 50 cm3
of 1.0 mol dm-3
H2SO4 solutionB 50 cm
3of 2.0 mol dm
-3H2SO4 solution
C 100 cm3
of 1.0 mol dm-3
H2SO4 solution
D 150 cm3
of 1.0 mol dm-3
H2SO4 solution
38 The reaction between lead(II) nitrate and potassium iodide solution is represented
by the equation below
Pb(NO3)2 (aq) + 2KI (aq) PbI2 (s) + 2KNO3 (aq)
10.0 cm3
of 1.0 mol dm-3
potassium iodide solution is mixed with 20.0 cm3
of 1.0
mol dm-3
lead(II) nitrate solution.
What is the maximum mass of lead(II) iodide produced in this reaction?
[Relative atomic mass: I ,127 and Pb, 207]
A 3.34 g
B 4.61 g
C 6.68 g
D 9.22 g
Copper(II) chloride
solution
Copper
Magnesium nitrate
solution
Magnesium
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
17/44
SULIT
SULIT 4541/117
39 The diagram shows a structural formula of a polymer.
Which of the following is the monomer of the polymer?
H H
C C
H Cl n
Cl
Cl
Cl
Cl Cl
A
B
C
D
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
18/44
SULIT
SULIT 4541/118
40 The graph shows the volume of carbon dioxide gas released against time for the
reaction between 25 cm3
of hydrochloric acid with excess marble.
What is the concentration of acid used?
[Molar volume: 24 dm3
mol-1
at room temperature]
A 0.3 mol dm-3
B 0.4 mol dm-3
C 0.5 mol dm-3
D 0.6 mol dm-3
41
What is the molecular formula of compound X?[Relative atomic mass: C,12; H,1]
A CH2B C2H4C C2H6D C3H6
3.0 g of carbon reacts with 0.5 g ofhydrogen gas to form compound X.
Relative molecular mass of
com ound X is 42.
CaCO3 + 2HCl CaCl2 + CO2 + H2O
Volume of CO2/ cm3
180
Time/s
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
19/44
SULIT
SULIT 4541/119
42 Magnesium ribbon reacts with element Q from group 17 in Periodic Table.
Which of the following chemical equations is correct?
A Mg + Q MgQ
B Mg + Q2 MgQ2
C 2Mg + Q2 2MgQD Mg + 2Q MgQ2
43 Which of the following pairs show the correct uses of the isotopes?
Isotope Uses
I Cobalt-60 To destroy bacteria in food
II Carbon-14 To estimate the age of artifacts
III Iodine-131 To detect the location of tumour
IV Sodium-24 To detect leaks in underground petroleum
piping
A I and II only
B II and IV only
C I,II and III only
D I, II, III and IV
44 Sulphur dioxide gas, SO2 causes environmental pollution.
Which of the following environmental pollutions is affected by sulphur dioxide,
SO2?
I pH of the soil increases
II Lakes and rivers become acidic
III Salts are leached out of the top soil
IV Buildings and metal structures will corrode
A I and II only
B I and III only
C II, III and IV only
D I, II, III and IV
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
20/44
SULIT
SULIT 4541/120
45 Which of the following diagrams is used to electroplate an iron spoon with silver?
A
B
C
D
Iron spoon Silver strip
Silver chloride
Silver nitrate
Silver stripIron spoon
Iron spoon Silver strip
Silver chloride
Iron spoon Silver strip
Silver nitrate
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
21/44
SULIT
SULIT 4541/121
46 What is the volume of 0.2 mol dm-3
sulphuric acid solution required to completely
neutralize 50 cm3
of 0.2 mol dm-3
potassium hydroxide solution?
A 25 cm3
B 30 cm3
C 45 cm3
D 50 cm3
47 The diagram shows the structural formula of compound X.
Which of the following is an isomer of X?
Compound X
A
B
C
D
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
22/44
SULIT
SULIT 4541/122
48 Which pair of the organic compounds below can be distinguished by using
acidified potassium manganate(VII)?
A C2H6 and C3H8
B C2H5OH and C3H6
C CH3CH2COOH and CH3CHCHOH
D CH3CH2CH2CH3 and CH2CHCH2CH2CH3
49 Which of the following reactions represent the precipitation reactions?
I Pb(NO3)2 + Na2SO4 PbSO4 + 2NaNO3
II Ba(NO3)2 + 2KCl BaCl2 + 2KNO3III Pb(NO3)2 + 2KCl PbCl2 + 2KNO3IV Ca(NO3)2 + Na2SO4 CaSO4 + 2NaNO3
A I and III only
B I, II and III only
C I, III and IV only
D 1, II, III and IV
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
23/44
SULIT
SULIT 4541/123
50 The diagram shows the graph of volume of oxygen gas against time. Curve I is
obtained from the decomposition of 20 cm3
of 0.2 mol dm-3
hydrogen peroxide
solution.
Which of the following solutions will produce curve II?
A 40 cm3
0.1 mol dm-3
hydrogen peroxide solution
B 20 cm3
0.4 mol dm-3
hydrogen peroxide solution
C 30 cm3
0.2 mol dm-3
hydrogen peroxide solution
D 40 cm3
0.4 mol dm-3
hydrogen peroxide solution
END OF QUESTION PAPER
V
2V
Volume of oxygen /cm3
I
II
Time/s
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
24/44
1
SULIT 4541/1/2/3
4541
Chemistry
Marking Scheme
Mei
2008
BAHAGIAN SEKOLAH
KEMENTERIAN PELAJARAN MALAYSIA
______________________________________________
PEPERIKSAAN PERTENGAHAN TAHUN 2008
FORM 5 CHEMISTRY
MARKING SCHEME FOR PAPER 1, 2 AND PAPER 3
Peraturan pemarkahan ini mengandungi halaman bercetak.
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
25/44
2
PAPER 1
1 B 21 D 41 D
2 C 22 D 42 B
3 B 23 B 43 D4 C 24 A 44 C
5 D 25 C 45 B
6 A 26 A 46 A
7 B 27 D 47 B
8 A 28 A 48 D
9 D 29 C 49 C
10 D 30 A 50 B
11 D 31 A
12 C 32 B
13 A 33 D14 A 34 A
15 C 35 C
16 B 36 A
17 C 37 D
18 C 38 B
19 C 39 B
20 C 40 D
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
26/44
3
PAPER 2-SECTION A
No. Rubric Mark
1 a
b (i)
(ii)
c
d
e (i)
(ii)
(iii)
G
Has stable /octet electron arrangement//8 valence electron
2A + 2H2O 2AOH + H2
Use a small pieces//use a forcep// use a google
G,E,D, A,J,L
Has same valence electron// valence electron is 1
DE2 r: E2D
[can draw the diagram of electron arrangement correctly]
- Correct structure of atoms
- Correct ratio of atoms=1:2
Has (neutral ) molecule
TOTAL
1
1
1
1
1
1
1
2
1
10
2 a
b(i)
(ii)
c
d
e (i)
(ii)
(iii)
T1
PQ: solid + liquid
RS: liquid
Heat energy absorbed
is used to overcome the forces of attraction between particles
// Heat is absorbed to overcome the intermolecular forces
r: ion/atom
(1+1)
The particles / molecules move faster
Iodine/I2//napthalene/C10H8
Copper/ Cu
Ion
Diffusion
TOTAL
1
1
1
1
1
1
1
1
1
1
10
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
27/44
4
3 a (i)
(ii)
b (i)
(ii)
(iii)
c (i)
(ii)
d
3H2 + N2 2NH3
( Extract from ) air
Neutralization
H2SO4+ 2NH3 (NH4)2SO4
//H2SO4+ 2NH4OH (NH4)2SO4 + H2O
Fertilizer
Tin
In pure copper the layer of atom are easily slide over each
other when external force is applied on them.
The different size of foreign atoms in allloy are prevent the
layers of atom from slide each other when external force is
applied.
TOTAL
1
1
1
1
1
1
(1+1)
1
1
10
4 a
b(i)
(ii)
1 Diagram of set up of apparatus complete and functional
2 Label
(Anode) impure copper and (cathode ) pure copper
3 ( Electrolyte) copper (II) sulphate / copper (II) chloride // copper
(II) nitrate solution
a: chemical formula
1 become thinner // decrease in mass
2 become thicker // increase in mass
1 ( Remain )unchanged
2 Number of Cu2+
ions produced at anode same as number of
copper atoms produced at cathode // the rate of formation of Cu2+
1
1
1
1
1
1
Copper atomCopper atom
Tin atom
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
28/44
5
c (i)(ii)
d
ions at the anode is the same as the rate of discharge of Cu2+
at
cathode.
(Anode ):Cu Cu2+
+ 2e
(Cathode ): Cu2+
+ 2e Cu
Electroplating of metals/ Extraction of reactive metals
TOTAL
1
1
1
1
10
5 a
b
c (i)
(ii)
d
2H2O2 O2 + 2H2O
Number of mole of H2O2 = 20 x 2/1000= 0.04
2 mol of H2O2 produce 1 mol of O2 //
Number of mole of O2 = 0.04/2 = 0.02
Volume, O2 = 0.2 x 24dm3
= 4.8 dm3
Rate of reaction in experiment II is higher than experiment I
The concentration/number of molecule per unit volumeof
hydrogen peroxide in II is higher
The frequency of collision between H2O2 molecule is higher
The frequency of effective collision is higher
Volume of gas/cm3
Time(s)
Label Y axes and X axes
Correct curve and label I and II
TOTAL
1
1
1
1
1
1
1
1
1
1
10
II
I
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
29/44
6
6 a
b (i)
(ii)
(iii)
c (i)
(ii)
(iii)
d (i)
(ii)
(iii)
A compound that contain element of carbon and derive from living
organisms.
C2H4
ethene
double bond between carbon atoms
(a: C=C )
Acidified potassium manganat (VII) // Acidified potassium
dicromate (VI)
Oxidation
Purple to colourless // orange to green
C2H4 + H2O C2H5OH
Alcohol
Temperature 300oC // Pressure 60 atmosphere // concentrated
phosphoric acid
TOTAL
1
1
1
1
1
1
1
1
1
1
10
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
30/44
7
SECTION B
No. Rubric Mark
7 a (i)
(ii)
b
Compound that form when non metal atom gain/receive/accept
electron that release/lose/donate by metal atom to achieve stable
/octet/duplet electron arrangemen
Compound that form between non metal atom by sharing their
valence electron to achieve stable/octet /duplet electron
arrangement
Between P and Q
Atom X has 1 valence electron
Atom X loses/donates/transfers 1 electrons to form X+
ion //
XX+
+ e- and attain stable octet electron arrangement
Atom Y has 7 valence electrons
Atom gains/receives/accept 1 electron to formY-
ion//
Y + e-Y-
attain the stable /octet electron arrangement
The two oppositely-charged ions// the X+
and Y-
ion are
bonded together by a strong electrostatic force
To form a ionic compound with the formula XY// diagramn
Max 7
1
1
1
1
1
1
1
1
1
X
Y
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
31/44
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
32/44
9
8 a
b
c(i)
Empirical formula- Formula shows simplest ratio of atoms of each
element in the compound
Molecular formula- Formula shows actual number of atoms of
each element in the compound
Molecular Formula = ( Empirical formula )n
= ( CH2 )n
Relative Molecular Mass ( CH2 )n = 70
12n + 2n= 70
14n=70
n=5
Molecular Formula C5H10
1. Metal Z is cleaned using sand paper
2. A crucible and its lid are weighed and the mass is recoded
3. Metal Z is palced in the crucible. The crucible,lid and its
content is weighed and the mass is recorded.
4. The crucible with its content is heated strongly without
lid.
5. When metal Z start burn, the crucible is covered by its
lid
6. the covered is raise a little at intervals
7. When there is no more reaction, the lid is removed and the
crucible is heated strongly for a few minutes.
8. Cool the crucible and weigh the crucible,its lid and its
Content and record the mass.
9. The process of heating, cooling and weighing is repeated
until constant is obtained.
10. (Precaution step );
Close the crucible immediately to prevent loss of
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
TOTAL 20
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
33/44
10
Element Z O
Mass(g) 1.30 0.32
mol 1.30/65=0.02 0.32/16=0.02
Simplest
ratio
1 1
Empirical Formula ZO
TOTAL
1
1
1
1
1
20
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
34/44
11
PAPER2 SECTION C
No Rubric Mark
9 a
b (i)
(ii)
c(i)
Sample answer :
Zn + HNO3 Zn(NO3)2 + H2O
ZnCO3 + HNO3 Zn(NO3)2 + H2O + CO2
ZnO + HNO3 Zn(NO3)2 + H2O
Any two
Methanoic acid partial ionizes in water
produce low concentration of hydrogen ion
Glacial ethanoic acid has (neutral) molecule
Methanoic acid aqueous ionizes in water
to produce free moving ion
Procedure :
1 100 cm3
of 0.1 moldm-3
sulphuric acid is poured into a beaker
and heated slowly.
2 zinc carbonate is added into the sulphuric acid until in excess/no
longer dissolves.
3 Stir the solution and filtered.
4 The filtrate is poured into an evaporating dish and heat until
saturated
5 The hot saturated salt solution is allowed to cool
6 The crystals formed are filtered out, rinsed with distilled water
7 dried between sheets of filter paper.
2
1
11
1
1
1
1
1
1
1
1
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
35/44
12
(ii)
d
ZnCO3 + H2SO4 ZnSO4 + H2O + CO2
Number of mole , H2SO4 = 0.1( 100 )/1000
= 0.01
1 mol of H2SO4 produce 1 mol of ZnSO4
Mole of ZnSO4 = 0.01
Mass of ZnSO4 = 0.01 X 161
= 16.1 g
Sample answer :
1 ammonium chloride as a fertilizer
2 copper (II) sulphate as a pesticide
3 hydrated calcium sulphate to make plaster casts4 sodium chloride food additive
Any 2 suitable anwers(1+1)
TOTAL
1
1
1
1
1
1
20
10a (i)
(ii)
(iii)
(iv)
(v)
catalyst
esterification
CH3COOH + C3H7OH CH3COOC3H7 + H2O
Correct reactant
Correct product
Ethyl propanoate
Sweet smell/fruity smell/fragrant smell
//insoluble in water/soluble in organic solvent
//colourless
//less dense than water
any two properties (1+1)
1
1
1
1
2
2
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
36/44
13
b (i)
(ii)
Bacteria will produce lactic acid/H+
ions which neutralize
negatives charge of the protein membrane/ rubber molecules
The rubber molecules will be collide with each other and
cause protein membrane broken Rubber polymer are released and lump together
Hydroxide ions/OH-
from ammonia solution will neutralise
H+
produced by acid
The protein membrane remains negatively charged
The rubber particles repel each others/ the rubber polymers
cannot combine and coagulate
The presence of cross-linkage of sulphur atoms between
the rubber molecule
When vulcanized rubber is stretched and release, the cross-
linkage will pull the chain back to their original
arrangement
Diagram
Improves the elasticity and strength of the rubber / make
vulcanized rubbers more resistant to heat /organic solvent
or
Resistant to oxidation :
The presence of cross-linkage of sulphur atoms between
the rubber molecule
Diagram
C=C in vulcanized rubber is less than C=C in the
unvulcanized rubber,
so vulcanize rubber is more resistant to oxidation
TOTAL
1
1
1
1
1
1
1
1
1
1
1
1
1
1
20
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
37/44
14
PAPER 3
1 (a) KK0503 Measuring and using numbers
EXPLANATION SCORE
[Able to write all the times with units accurately]
Suggested answer:
t1 55.0 s, t2 48.0 s , t3 42.0 s , t4 37.0 s , t5 33.0 s
3
[Able to record all the times accurately but without units / no decimal place]
t1 55.0 , t2 48.0 , t3 42.0 , t4 37.0 , t5 33.0 //
// t1 55 s , t2 48.0 s , t3 42 s, t4 37s, t5 33s
2
[Able to write at least 3 readings of the times accurately] 1
No response given / wrong response 0
1 (b) KK0501- Observation
EXPLANATION SCORE
[Able to state the colour of sulphur and the rate of it is formed]
Suggested answer:
Pale / light yellow precipitate is slowly formed
3
[Able to state the colour of sulphur]
Pale / light yellow precipitate is formed.
2
[Able to state the formation of precipitate]
A precipitate is formed.
1
No response given / wrong response 0
1 (c) KK0506 Communicating
EXPLANATION SCORE
[Able to construct a table correctly containing three labeled columns with
correct units and record all the time and 1/time accurately ]
Suggested answer:
Temperature,o
C
30 35 40 45 50
Time , s 55.0 48.0 42.0 37.0 33.0
1 / time , s-1 0.018 0.021 0.024 0.027 0.030
3
[Able to construct a table correctly containing three labeled columns with
correct units and record all the time and 1/time but not accurately]
2
[Able to write at least 3 readings of the times accurately] 1
No response given / wrong response 0
1 (d) (i) KK0506 Communicating
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
38/44
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
39/44
16
30
35
40
45
50
0.015 0.020 0.025 0.030X
X
X
X
X
Temperature /o
C
1/time , s-1
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
40/44
17
1(e) KK0510 - State variables
EXPLANATION SCORE
[Able to state three variables and three action to be taken]Suggested answer:
Variable Action to be taken
Manipulated:
Temperature
Heat the sodium thiosulphate
solution at different temperature //
Use different temperature.
Responding:
Rate of reaction / time taken for X
marks to disappear from view.
Record the time taken for X mark
to disappear from view.
Controlled :
Concentration and volume of H2SO4,
concentration and volume of sodium
thiosulphate solution, size of conical
flask.
Use the same concentration and
volume of H2SO4 /sodium
thiosulphate solution // Use same
size conical flask.
3
[Able to state any two variables and any two action to be taken] 2
[Able to state any one variables and any one action to be taken] 1
No response given / wrong response 0
2 (a) KK0506 CommunicatingEXPLAINATION SCORE
[Able to write the correct overall ionic equation]
Suggested answer:
Mg + Cu2+Mg
2++ Cu
3
Mg + CuSO4 MgSO4 + Cu 2
Mg Mg2+
+ 2e // Cu2+
+ 2e Cu 1
No response given / wrong response 0
2(a)(i) KK 0504 Making inferenceEXPLANATION SCORE
[Able to state the correct inference]
Suggested answer:
Magnesium atom releases/donate/loses electrons to produce magnesium ion //
Magnesium is corrode.
3
Magnesium becomes thinner // mass of magnesium decreases 2
Magnesium dissolves 1
No response given / wrong response 0
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
41/44
18
2(b) KK 0505 - Predicting
EXPLANATION SCORE
[Able to state the voltage value]
0.65 V
3
0.63 0.64 V // 0.66 0.67 V 2
< 0.64 V // > 0.67 V 1
No response given / wrong response 0
2(c)KK 0508 Interpreting Data
EXPLANATION SCORE
[Able to arrange the position of all metals in an ascending order based on
tendency to release electrons correctly]
Copper > Lead > Iron > Zinc > Magnesium
3
[Able to arrange the position of all metals in descending order based on
tendency to release electrons]
Magnesium > Zinc > Iron > Lead > copper
2
[Able to arrange the position of at least four metals in ascending order based
on tendency to release electrons correctly]
1
No response given / wrong response 0
2(d) KK0509 Operational definitionEXPLANATION SCORE
[Able to state the correct and complete operational definition]
Suggested answer:
The further the metal is from copper in the electrochemical series, the greater
is their voltage reading. //
3
[Able to give incomplete relationship]
Suggested answer:
The further apart the metal is in the electrochemical series, the greater thepotential difference / voltage reading.
2
[Able to state an idea]
Suggested answer:
The position of metal influence the voltage reading //
Type of metal influence the voltage reading.
1
No response given / wrong response 0
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
42/44
19
3.(a) KK051021 Statement of problem
EXPLANATION SCORE
[Able to make a suitable statement of problem]
Suggested answer:
How to differentiate between magnesium nitrate solution and calcium nitrate
solution // How to differentiate between magnesium ion and calcium ion
3
[Able to make a suitable aim]
Suggested answer:
To differentiate the presence of magnesium ion and calcium ion by using
aqueous ammonia solution.
2
[Able to state an idea of statement of problem or aim] 1
No response given / wrong response 0
3(b) KK051202 Stating hypothesis
EXPLANATION SCORE
[Able to state the relationship between manipulated variable and responding
variable correctly]
Suggested answer:
If the addition of aqueous ammonia solution forms white precipitate which is
insoluble in excess ammonia aqueous solution, then the solution tested is
magnesium nitrate. // If aqueous ammonia solution is added and no changeoccur then the solution tested is calcium nitrate.
3
[Able to state the relationship between manipulated variable and responding
variable]
2
[Able to state an idea of the hypothesis] 1
No response given / wrong response 0
3 (c) KK051202 Stating variables
EXPLANATION SCORE
[Able to state all the three variables correctly]Suggested answer:
Manipulated variable : magnesium nitrate and calcium nitrate // Mg2+
and Ca2+
Responding variable: formation of white precipitate
Controlled variable : aqueous ammonia solution
[Able to state any two of the variables correctly]
[Able to state one of the variables correctly or state idea regarding variable]
No response given / wrong response
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
43/44
20
3(d) KK051205 List of substances and apparatus
EXPLANATION SCORE
[Able to state the list of substances and apparatus correctly and completely]
Suggested answer:
Test tube, dropper, test tube rack
0.5 mol dm-3
magnesium nitrate solution, 0.5 mol dm-3
calcium nitrate
solution, aqueous ammonia solution.
3
[Able to state the list of substances and apparatus correctly but not
completely]
Suggested answer:
Test tube
0.5 mol dm-3
magnesium nitrate solution, 0.5 mol dm-3
calcium nitrate
solution, aqueous ammonia solution.
2
[Able to state an idea about the list of substances and apparatus]
Suggested answer:
Test tube
magnesium nitrate, calcium nitrate
1
No response given / wrong response 0
3(e) KK051204 Technique /Precedure
EXPLANATION SCORE[Able to state a complete experimental procedure]
Suggested answer:
1. 2 cm3
of solution A is poured into a test tube.
2. A few drops of aqueous ammonia solution are added into the test tube
using a dropper and the test tube is shaken well.
3. If the precipitate is formed, aqueous ammonia solution is added
continuously until no further change occurred / until excess
4. The mixture is shaken well.
5. The changes occur is recorded in a table.
6. Steps 1 to 4 are repeated using solution B.
3
[Able to state a complete experimental procedure]
1,2,3,4,5
2
[Able to state a complete experimental procedure]
1,2,3,5
1
No response given / wrong response 0
-
8/14/2019 Kimia P1 SBP Mid Year SPM 2008
44/44
3(f) Tabulation of data
EXPLANATION SCORE
[Able to exhibit the tabulation of data correctly ]
Reagent Observation
Test tube/Solution A Test tube/Solution B
Aqueous
ammonia solution 3
[Able to exhibit the tabulation of data less accurately ]
Reagent Test tube /Solution A Test tube/Solution B
Aqueous
ammonia solution
2
[Able state an idea about the tabulation of data] 1
No response given / wrong response 0
END OF MARKING SCHEME