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Mock IGCSE Sample Examination Paper
CHEMISTRY PAPER 1 Multiple Choice
45 minutes
Answer questions on the Multiple Choice Answer Sheet.
Answer all questions.
A copy of the Periodic Table is printed on page 11.
There are forty questions on this paper.
For each question there are four possible answers A, B, C, and D.
Choose the one you consider correct and record your choice in pencil on the Multiple Choice
Answer Sheet.
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2
1 In which of these are the particles arranged in a regular pattern, at room temperature?
a oxygen
b iodine
c mercury
d water
2 Which statement is correct, about the diffusion of one gas into another?
a Once the gases are fully mixed, the particles stop moving.
b The particles of both gases continue moving in a random way.
c The heavier gas sinks to the bottom of the mixture.
d The gases combine to form a new product.
3 You are asked to find how it takes for 0.05 g of magnesium ribbon to react completely
with 10 cm3 (an excess) of dilute acid. Which set of apparatus will you need?
a balance, clock, pipette
b balance, clock, thermometer
c balance, pipette, thermometer
d clock, pipette, thermometer
4 Which mixture cannot be separated by fractional distillation?
a crude oil (petroleum)
b liquid air
c alcohol and water
d a solution of salt in water
5 Which is the nucleon number for the sodium ion?
a 11
b 22
c 23
d 34
6 Which do these two diagrams represent?
p
n n
e
p
n
e
a different atoms of the same element
b ions of the same element
c atoms of two different elements in the same period
d atoms of two different elements in the same group
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3
7 The table describes the structures of four particles.
particle
number of
protons
number of
neutrons
number of
electrons
N
7
7
7
N32
7
7
X
Mg
12
Y
12
Mg21
12
12
Z
Which are the correct values of X, Y, and Z?
X
Y
Z
A
7
10
10
B
9
11
11
C
10
12
10
D
10
12
12
8 Which diagram shows the correct bonding for water?
H
A
B
C
D
O
O
O
O
H
H
H
H
H
H
H
9 Which substance has a giant structure, in which each carbon atom forms a tetrahedron with
four other carbon atoms?
a silicon dioxide
b graphite
c methane
d diamond
10 A chemical has a relative molecular mass of 100.
Which of these could it be?
a H2O
b H2SO4
c CaCO3
d C14H16
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4
11 When ethene is burned, carbon dioxide and water are formed:
C2H4 1 3O2 xCO2 1 yH2O
Which values of x and y balance the equation?
x
y
A
1
2
B
2
2
C
2
4
D
4
4
12 Magnesium chloride (MgCl2) and calcium oxide (CaO) are ionic compounds.
Electricity is passed through the molten compounds, in two separate experiments.
Which are the products at the cathodes?
a magnesium and calcium
b magnesium and oxygen
c oxygen and calcium
d chlorine and oxygen
13 You want to electroplate an iron key with copper. Which pair of materials would be suitable,
for the positive electrode and the electrolyte?
positive electrode
electrolyte
A
iron
iron(II) sulfate
B
iron
copper(II) sulfate
C
copper
iron(II) sulfate
D
copper
copper(II) sulfate
14 Which equation shows hydrogen acting as a fuel?
a 2H2O 1 energy 2H2 1 O2
b 2H2 1 O2 1 energy c 2H2 1 O2 d 2H2O 2H2O
2H2O 1 energy
2H2 1 O21 energy
15 Only one of these changes is endothermic. Which one?
a snow melting on the pavement
b methane reacting with oxygen
c hydrochloric acid neutralising sodium hydroxide
d water vapour condensing on a window
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5
16 When water is added to anhydrous cobalt chloride, the following reaction occurs:
CoCl2 (s) 1 6H2O (l ) CoCl2. 6H2O (s)
The reaction can be reversed.
Which row gives the conditions required to reverse this reaction?
heating
adding water
A
✓
✓
B
✓
✗
C
✗
✓
D
✗
✗
17 In which of these is the first chemical in the equation not oxidised?
a 2NO2 N2O4
b 2H2 1 O2 c 2Mg 1 CO2 d 2CO 1 O2 2H2O
2MgO 1 C
2CO2
18 Zinc reacts with acids, giving hydrogen gas.
Which of these conditions will give the slowest reaction?
zinc
acid
temperature /°C
A
pieces
concentrated
50
B
pieces
dilute
25
C
powder
concentrated
50
D
powder
dilute
25
19 In flour mills, extractor fans are used to remove fine flour particles from the air, to prevent
an explosion. The risk of explosion is because the flour particles:
a have a very large surface area
b group together to form larger particles
c catch fire spontaneously on colliding with air particles
d catalyse the reaction between gases in the air
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20 Two tests were carried out on an unknown compound.
The results are shown in the table.
Test
A solution of sodium
hydroxide was added.
Aluminium foil was added
and the mixture was heated.
Observation
a green precipitate forms
ammonia gas forms
What is the name of the unknown compound?
a ammonium sulfate
b copper(II) nitrate
c iron(II) nitrate
d iron(II) sulfate
21 Sodium hydroxide is added to water. Which change in pH could occur?
a 1 7
b 7 1
c 7 14
d 14 7
22 Which of these is a characteristic property of bases?
a turn blue litmus red
b react with ammonium salts to give ammonia gas
c react with most metals giving hydrogen gas
d dissolve in water to give a weakly acidic solution
23 You can use the pairs of compounds below to prepare salts. For one pair, there will be
no more fizzing when the reaction is complete. Which pair?
a copper(II) carbonate 1 hydrochloric acid
b magnesium oxide 1 sulfuric acid
c copper(II) oxide 1 nitric acid
d sodium hydroxide 1 sulfuric acid
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7
24 Six elements are numbered, in this outline of the Periodic Table.
1
3
5
4
2
6
Which numbers represent two reactive non-metals in the same group?
a 1 and 3
b 3 and 4
c 1 and 2
d 5 and 6
25 Fluorine is above chlorine in Group VII of the Periodic Table.
• The boiling point of fluorine is i ………… than that of chlorine.
• The reaction of fluorine with iron is ii ………… than that of chlorine.
Which row gives the correct missing words?
i
ii
A
higher
more vigorous
B
higher
less vigorous
C
lower
more vigorous
D
lower
less vigorous
26 Which property do all metals have?
a They are strong.
b They conduct electricity.
c They form soluble basic oxides.
d They react with oxygen.
27 For many uses, alloys are preferred to pure metals. This is usually because …
a most pure metals are too reactive to use on their own
b alloying gives a heavier and less brittle solid
c pure metals are not malleable enough for most purposes
d alloys can made with the right properties for a given use
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28 Strips of metal X are placed in solutions of two metal sulfates.
This table shows the results:
metal X
copper(II) sulfate
iron(II) sulfate
copper forms
no reaction
The order of reactivity for the three metals (the most reactive first) is:
a X, copper, iron
b iron, copper, X
c iron, X, copper
d copper, X, iron
29 A metal lies between aluminium and sodium in the reactivity series.
Which is the most likely method for extracting it from its ore?
a heating the ore with carbon
b electrolysis of the molten ore
c roasting the ore in a limited supply of air
d heating the ore with sodium
30 Which chemical is used to remove acidic impurities, during steel making?
a chromium
b carbon dioxide
c calcium oxide
d sodium hydroxide
31 Anhydrous copper(II) sulfate reacts with water in this way:
CuSO4 (s) 1 5H2O (l ) CuSO4. 5H2O (s)
This reaction can be used as a test for water, because …
a the anhydrous and hydrated compounds have different colours
b there is a significant temperature rise when the water is added
c when water is added, the compound dissolves
d the reaction can be easily reversed
32 Which method of rust prevention does not rely on keeping oxygen away?
a paint the iron
b cover the iron with grease
c coat the iron with plastic
d alloy the iron with another metal
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33 Exhaust gases from cars may contain acidic oxides of nitrogen, as a result of …
a the incomplete combustion of compounds in petrol
b the presence of nitrogen compounds in petrol
c reactions with the catalyst, in the car’s exhaust system
d the reaction between nitrogen and oxygen, in the car engine
34 Which elements, essential for plants, do fertilisers provide?
carbon
potassium
phosphorus
nitrogen
A
✓
✓
✗
✓
B
✗
✓
✓
✓
C
✓
✗
✓
✓
D
✓
✓
✓
✗
35 Which products are obtained when limestone (calcium carbonate) is heated?
a calcium oxide and carbon
b calcium, oxygen, and carbon
c calcium oxide and carbon dioxide
d calcium hydroxide and carbon dioxide
36 Which fraction, from the fractional distillation of petroleum, is used as feedstock
for making other chemicals?
a bitumen
b gasoline
c fuel oil
d naphtha
37 Pentane is a typical alkane. Which two words complete these statements correctly?
Pentane is generally chemically i …………………
Pentane ii …………… be used as a fuel.
1
2
A
unreactive
cannot
B
unreactive
can
C
reactive
cannot
D
reactive
can
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38 Three organic compounds, X, Y, and Z, are members of the same homologous series.
This means they have …
a the same functional group
b the same number of carbon atoms in their molecules
c the same molecular formula
d the same physical properties
39 Below are the structural formulae for four compounds. One is a saturated compound
which reacts with magnesium in solution, to give hydrogen gas. Which one?
A
CH2OH
B
CO2H
C
CO2H
D
CH2OH
CH2
CH
CH2
CH
CH3
CH2
CH3
CH2
40 A hydrocarbon forms an addition polymer. Which will also be true for this hydrocarbon?
a It is soluble in water.
b It has molecules with very long chains.
c It turns damp blue litmus paper red.
d It turns bromine solution colourless.
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Fr
Caesium
88
56
Radium
Ra
226
Barium
137
Ba
133
Cs
38
Strontium
La
139
Yttrium
89
57
Ac
Actinium
227
Lanthanum
39
89
Y
88
Sr
Key
*
22
b
X
b = proton (atomic) number
a = relative atomic mass
X = atomic symbol
72
Hafnium
Hf
178
Zirconium
40
Zr
91
Titanium
a
*58-71 Lanthanoid series
90-103 Actinoid series
87
Scandium
21
85
Calcium
Rb
20
48
Ti
45
Sc
40
Ca
39
Francium
55
37
Magnesium
12
K
Sodium
24
Mg
Beryllium
23
Rubidium
19
4
Na
Lithium
Potassium
11
3
9
Be
7
II
Li
I
90
58
73
96
Pa
91
Protactinium
59
Praseodymium
Tc
186
144
92
60
U
Uranium
238
Nd
Neodymium
75
Re
Rhenium
43
Technetium
25
Manganese
55
Mn
Pm
Osmium
190
Os
93
Np
Neptunium
61
Promethium
76
44
Ru
101
Iron
Ruthenium
26
Fe
56
Hydrogen
150
94
Pu
Plutonium
62
Sm
152
95
Am
Americium
63
Eu
Europium
78
Platinum
Pt
Iridium
195
Ir
46
Pd
106
Nickel
Palladium
28
59
Ni
192
Samarium
77
45
Rh
103
Cobalt
Rhodium
27
59
Co
96
64
Cm
Curium
Gd
157
Gold
Au
197
Silver
Ag
108
Copper
Gadolinium
79
47
29
64
Cu
Bk
Terbium
Tb
159
Mercury
201
Hg
97
Berkelium
65
80
48
Cd
112
Zinc
Cadmium
30
65
Zn
Cf
Dy
162
Thallium
T
204
Indium
98
Es
Holmium
Ho
165
Lead
Pb
207
Tin
99
Einsteinium
67
82
50
119
Sn
115
Californium
66
Germanium
32
Ge
73
Silicon
In
Gallium
70
Ga
14
28
Si
Carbon
27
Dysprosium
81
49
31
6
A
Boron
Aluminium
13
5
12
C
11
IV
B
III
The volume of one mole of any gas is 24 dm 3 at room temperature and pressure (r.t.p.).
Thorium
Th
232
Cerium
141
Pr
140
74
W
184
Tungsten
42
Mo
Molybdenum
24
Chromium
52
Cr
Ce
Ta
181
Niobium
93
Nb
Tantalum
41
23
Vanadium
51
V
1
1
H
Group
DATA SHEET
The Periodic Table of the Elements
Fm
Fermium
Erbium
Er
167
Bi
209
Bismuth
100
68
83
51
Sb
122
Arsenic
75
As
Antimony
33
15
P
31
Nitrogen
Phosphorus
7
N
14
V
Md
Thulium
169
Tm
101
Mendelevium
69
84
Polonium
Po
Tellurium
52
Te
128
Se
79
Sulfur
No
102
Nobelium
70
Yb
173
At
Astatine
Iodine
I
127
Bromine
Ytterbium
85
53
35
Br
80
Chlorine
Lr
Lutetium
Lu
175
Rn
Radon
Xenon
Xe
131
Krypton
103
Lawrencium
71
86
54
36
Kr
84
Argon
40
Ar
Neon
C
18
10
Ne
20
Helium
35.5
Fluorine
2
He
4
0
32
17
9
F
19
VII
S
Oxygen
Selenium
34
16
8
O
16
VI
11
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