Cambridge IGCSE™
CHEMISTRY
Paper 1 Multiple Choice (Core)
0620/11
October/November 2023
45 minutes
You must answer on the multiple choice answer sheet.
You will need: Multiple choice answer sheet
Soft clean eraser
Soft pencil (type B or HB is recommended)
INSTRUCTIONS
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There are forty questions on this paper. Answer all questions.
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For each question there are four possible answers A, B, C and D. Choose the one you consider correct
and record your choice in soft pencil on the multiple choice answer sheet.
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Follow the instructions on the multiple choice answer sheet.
Write in soft pencil.
Write your name, centre number and candidate number on the multiple choice answer sheet in the
spaces provided unless this has been done for you.
Do not use correction fluid.
Do not write on any bar codes.
You may use a calculator.
INFORMATION
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The total mark for this paper is 40.
Each correct answer will score one mark.
Any rough working should be done on this question paper.
The Periodic Table is printed in the question paper.
2
This document has 16 pages. Any blank pages are indicated.
1
Which substance is a pure compound?
A
air
B
brass
C
ethanol
D
petroleum
14 Solid S changes colour from white to blue when water is added.
What is S?
A
anhydrous cobalt(II) chloride
B
anhydrous copper(II) sulfate
C
hydrated cobalt(II) chloride
D
hydrated copper(II) sulfate
15 Which equation shows the reduction of copper?
A
CuO + C → Cu + CO
B
2CuS + 3O2 → 2CuO + 2SO2
C
Cu(g) → Cu(l)
D
Cu(l) → Cu(s)
16 Which solids react with dilute sulfuric acid to form aqueous magnesium sulfate?
A
1
magnesium
2
magnesium hydroxide
3
magnesium nitrate
4
magnesium oxide
1, 2 and 4
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B
1 and 3
C
2, 3 and 4
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D
2 and 4 only
3
17 Which statements about an aqueous acid are correct?
1
Ammonia is formed when solid ammonium nitrate is added to an aqueous acid.
2
Effervescence is seen when sodium carbonate is added to an aqueous acid.
3
Methyl orange becomes yellow when added to an aqueous acid.
4
Red litmus remains red when added to an aqueous acid.
1 and 3
A
B
1 and 4
C
2 and 3
D
2 and 4
18 Copper(II) sulfate is formed by reacting excess solid copper(II) carbonate with dilute sulfuric
acid.
Which processes are part of the preparation of solid copper(II) sulfate?
1
crystallisation
2
distillation
3
filtration
4
titration
1 and 3
A
B
1 and 4
C
2 and 3
D
2 and 4
19 Element X forms ions with the formula X2–.
Which row describes element X?
group number
type of element
A
II
metal
B
II
non-metal
C
VI
metal
D
VI
non-metal
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20 The table shows some physical properties of four different substances.
Which row describes the properties of a non-metallic element?
melting point /
°C
conductivity
when solid
conductivity
when melted
A
63
good
good
B
119
poor
poor
C
659
good
good
D
808
poor
good
25 Iron nails are stored in an airtight container.
lid
air
iron nails
The nails begin to rust after a few days.
How can the rusting of the nails be prevented?
A
Leave the lid off.
B
Replace the air with argon.
C
Put the container in a warm place. D
Seal the container in a bag.
26 Four substances present in the blast furnace during iron extraction are listed.
1
calcium carbonate
2
carbon dioxide
3
carbon monoxide
4
iron(III) oxide
Which substances are both a reactant and a product during the reactions occurring in the blast
furnace?
A
1 and 2
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B
1 and 4
C
2 and 3
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D
3 and 4
5
27 Which test is used to show that a sample of water is pure?
A
Evaporate the water to see if any solids remain.
B
Heat the water to check its boiling point.
C
Test with anhydrous cobalt(II) chloride.
D
Use universal indicator paper to check its pH.
28 What are the main products obtained by the fractional distillation of liquid air?
A
carbon dioxide and oxygen
B
carbon dioxide and water vapour
C
nitrogen and oxygen
D
nitrogen and water vapour
29 The apparatus used to investigate the rate at which hydrogen gas is given off when a piece of
magnesium reacts with dilute hydrochloric acid is shown.
hydrogen gas
magnesium and
dilute hydrochloric acid
water
Which additional piece of apparatus is needed to determine the rate of reaction?
A balance
B
burette
C
stop-watch
D
volumetric pipette
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30 Ethane is used as a fuel.
Which equation shows the complete combustion of ethane?
A
2C2H6 + 7O2 → 4CO2 + 6H2O B
C
C2H4 + 3O2 → 2CO2 + 2H2O
D
C2H4 + 2O2 → 2CO + 2H2O
2C2H6 + 5O2 → 4CO + 6H2O
31 The equation for the reaction of aqueous calcium nitrate and aqueous sodium hydroxide is
shown.
Ca(NO3)2(aq) + 2NaOH(aq) → Ca(OH)2(s) + 2NaNO3(aq)
Which process is used to remove calcium hydroxide from the mixture?
A
chromatography
B
crystallisation
C
distillation
D
filtration
40 The results of two tests on aqueous compound X are given.
test
result
warm with aluminium foil and
aqueous sodium hydroxide
ammonia is produced
aqueous sodium hydroxide
brown precipitate
What is X?
A
iron(III) nitrate
B
iron(II) nitrate
C
iron(III) sulfate
D
iron(II) sulfate
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7
4
5
6
7
8
Which statement about electrolysis is correct?
A
Bromine and hydrogen are formed during the electrolysis of molten lead(II) bromide.
B
Metals are formed at the positive electrode.
C
Molten covalent compounds are broken down by electricity.
D
Platinum is used as an inert electrode.
Which reaction shows a colour change from white to blue?
A
adding water to anhydrous copper(II) sulfate
B
adding water to hydrated copper(II) sulfate
C
heating anhydrous copper(II) sulfate
D
heating hydrated copper(II) sulfate
Which products are formed when magnesium carbonate reacts with dilute hydrochloric acid?
A
carbon dioxide, hydrogen and magnesium chloride
B
carbon dioxide and magnesium chloride only
C
carbon dioxide, water and magnesium chloride
D
water and magnesium chloride only
Which element forms an oxide that reacts with an aqueous solution of a base?
A
argon
B
sulfur
C
magnesium
D
copper
Which salt is insoluble?
A
barium sulfate
B
lead(II) nitrate
C
magnesium chloride
D
sodium carbonate
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Some properties of element R are shown.
9
melting point in C
98
boiling point in C
883
reaction with cold water
gives off H2 gas
reaction when heated with oxygen
burns to give a white solid
In which part of the Periodic Table is R found?
A
Group I
B
Group VII
C
Group VIII
D
transition elements
10 Lithium, sodium and potassium are elements in Group I.
Statements about these elements are listed.
1
Lithium is more dense than sodium.
2
Sodium is more reactive than potassium.
3
They all conduct electricity at room temperature.
4
They all react with oxygen at room temperature.
Which statements are correct?
1 and 2
A
11
B
1 and 4
C
2 and 3
D
3 and 4
Which row describes the properties of a metal that can be used in the manufacture of aircraft?
strength
density
ease of corrosion
A
high
high
corrodes easily
B
high
low
resists corrosion
C
low
high
corrodes easily
D
low
low
resists corrosion
12 Which metallic element is added to iron in the manufacture of stainless steel?
A
carbon
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B
copper
C
lead
D
nickel
13 Which statement about the uses of metals is correct?
A
Aluminium is used in the manufacture of overhead electrical cables as it has a high density.
B
Aluminium is used to make food containers as it conducts electricity.
C
Stainless steel is used in cutlery because it is resistant to rusting.
D
Stainless steel is used to make chemical reactors because it is a soft alloy.
14 The list gives the order of some metals and hydrogen in the reactivity series.
Metal X is also included.
most reactive
K
Mg
Zn
H
X
least reactive
Cu
Which row shows the properties of metal X?
reacts with
dilute acids
oxide reduced
by carbon
A
no
no
B
no
yes
C
yes
no
D
yes
yes
15 Which gas in the air is needed for iron to rust?
A
argon
B
carbon dioxide
C
nitrogen
D
oxygen
16 Why is limestone added to the blast furnace?
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A
It neutralises the molten slag produced.
B
It reacts with impurities to form slag.
C
It releases carbon dioxide which reduces the iron(III) oxide.
D
It removes acidic gases such as carbon dioxide.
17 Which process removes carbon dioxide from the atmosphere?
A
photosynthesis
B
thermal decomposition of calcium carbonate
C
combustion of fossil fuels
D reaction of sodium carbonate with an acid
18 The flow chart shows stages in the treatment of river water to produce drinking water.
river
water
sedimentation
tank
stage
J
stage
K
What occurs at stages J and K?
J
K
A
distillation
chlorination
B
distillation
filtration
C
filtration
chlorination
D
filtration
distillation
19 Which two compounds can be mixed together to form an NPK fertiliser?
A
ammonium phosphate and calcium hydroxide
B
calcium phosphate and ammonium nitrate
C
potassium nitrate and calcium oxide
D
potassium phosphate and ammonium nitrate
20 What are the main substances produced by the fractional distillation of liquid air?
A
oxygen and carbon dioxide
B
oxygen and nitrogen
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drinking
water
11
C
helium and nitrogen
D
hydrogen and oxygen
21 An acid–base titration is described.
●
25.0 cm3 of dilute aqueous alkali is put into a conical flask.
●
Indicator is added to the flask.
●
Dilute acid is added to the aqueous alkali until the indicator changes colour.
●
The volume of acid used is then recorded.
Which use of apparatus is correct?
A
The 25.0 cm3 of aqueous alkali is measured using a volumetric pipette.
B
The 25.0 cm3 of aqueous alkali is measured using the lines on the conical flask.
C
The volume of acid is measured using a measuring cylinder.
D
The volume of acid is measured using a volumetric pipette.
22 The apparatus shown is used to separate a mixture.
What is the mixture?
A
anhydrous copper(II) sulfate and hydrated copper(II) sulfate
B
sodium chloride and sand
C
ethanol and methanol
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iron and steel
D
23 The results of tests on three gases, X, Y and Z, are shown.
test
X
Y
Z
aqueous potassium manganate(VII)
purple to colourless
no change
no change
damp red litmus paper
no change
turns blue
no change
lighted splint
no change
no change
pops
What are X, Y and Z?
X
Y
Z
A
chlorine
sulfur dioxide
hydrogen
B
chlorine
sulfur dioxide
oxygen
C
sulfur dioxide
ammonia
oxygen
D
sulfur dioxide
ammonia
hydrogen
Aluminium is extracted from its purified ore as shown in Fig. 2.1.
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(i)
Name the ore of aluminium
.......................................................................................................................................
(ii)
The electrolyte contains aluminium oxide and one other substance. Name the other
substance and explain why it is used.
name ...................................................................................................................................
explanation .........................................................................................................................
.............................................................................................................................................
Write the ionic half-equation for the reaction at the cathode.
(iii)
.......................................................................................................................................
Explain why the anodes need frequent replacement.
(iv)
.............................................................................................................................................
.......................................................................................................................................
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