IGCSE chemisry

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IB12 06_0620_12/3RP© UCLES 2012 [Turn over

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8 5 0 4 *

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONSInternational General Certificate of Secondary Education

CHEMISTRY 0620/12

Paper 1 Multiple Choice May/June 2012

45 MinutesAdditional Materials: Multiple Choice Answer Sheet

Soft clean eraser Soft pencil (type B or HB is recommended)

READ THESE INSTRUCTIONS FIRST

Write in soft pencil.Do not use staples, paper clips, highlighters, glue or correction fluid.

Write your name, Centre number and candidate number on the Answer Sheet in the spaces provided unlessthis has been done for you.

There are forty questions on this paper. Answer all questions. For each question there are four possibleanswers A, B, C and D.

Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet.

Read the instructions on the Answer Sheet very carefully.

Each correct answer will score one mark. A mark will not be deducted for a wrong answer.

Any rough working should be done in this booklet.A copy of the Periodic Table is printed on page 16.

You may use a calculator.

w w w . X t r e m

e P a p e r s . c o m



2

© UCLES 2012 0620/12/M/J/12

1 Which diagram shows the process of diffusion?

A

B

C

D

differentatoms

key

2 Which method would be most suitable for the separation of a mixture of sand and water to obtainthe sand?

A chromatography

B crystallisation

C distillation

D filtration

3 A student investigates how the concentration of an acid affects the speed of reaction with a 0.5 gmass of magnesium at 30 °C.

The student has a beaker, concentrated acid, water and the apparatus below.

P a balance

Q a clock

R a measuring cylinder

S a thermometer

Which pieces of apparatus does the student use?

A P, Q and R only

B P, Q and S only

C Q, R and S only

D P, Q, R and S



3

© UCLES 2012 0620/12/M/J/12 [Turn over

4 An element Y has the proton number 18.

The next element in the Periodic Table is an element Z.

Which statement is correct?

A Element Z has one more electron in its outer shell than element Y.B Element Z has one more electron shell than element Y.

C Element Z is in the same group of the Periodic Table as element Y.

D Element Z is in the same period of the Periodic Table as element Y.

5 Which atom has twice as many neutrons as protons?

A H1

1 B H

2

1 C H

3

1 D He

4

2

6 The table contains information about four substances.

Which substance is potassium chloride?

conduction of electricitymelting point

/ °C when molten in aqueous solution

A 11 no yes

B 98 yes yes

C 772 yes yes

D 1410 no insoluble

7 The electronic structures of atoms P and Q are shown.

QP = electron

key

P and Q react to form an ionic compound.

What is the formula of this compound?

A PQ2 B P2Q C P2Q6 D P6Q2



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© UCLES 2012 0620/12/M/J/12

8 The diagrams show the structures of two forms, P and Q, of a solid element.

P Q

What are suitable uses of P and Q, based on their structures?

use of solid P use of solid Q

A drilling drilling

B lubricating drilling

C drilling lubricating

D lubricating lubricating

9 Methane, CH4, burns in the air to form carbon dioxide and water.

What is the balanced equation for this reaction?

A CH4(g) + O2(g) → CO2(g) + 2H2O(g)

B CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)

C CH4(g) + 2O2(g) → CO2(g) + H2O(g)

D CH4(g) + 3O2(g) → CO2(g) + 2H2O(g)

10 In which reaction is lead(II) oxide, PbO, oxidised?

A PbO + C → Pb + CO

B PbO + CO → Pb + CO2

C PbO + H2 → Pb + H2O

D 2PbO + O2 → 2PbO2



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11 The diagram shows an unsuccessful experiment to nickel plate a pan.

pan

nickel sulfatesolution

nickel cathode

–ve +ve

Which change is necessary to plate the pan with nickel?

A Add more nickel sulfate to the solution.

B Heat the solution to 100 °C.

C Increase the current in the circuit.

D Make the pan the negative electrode.

12 The rates of some chemical reactions can be measured by using the apparatus shown.

94.72 g

reactants

balance

For which reaction is this apparatus suitable?

A MgCO3 + 2HCl → MgCl 2 + CO2 + H2O

B Mg + ZnCl 2 → MgCl 2 + Zn

C MgCl 2 + 2NaOH → Mg(OH)2 + 2NaCl

D MgO + 2HCl → MgCl 2 + H2O



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© UCLES 2012 0620/12/M/J/12

13 The diagram shows that two gases are formed when concentrated hydrochloric acid iselectrolysed using inert electrodes.

+ve –ve

concentratedhydrochloric acid

Which row correctly describes the colours of the gases at the electrodes?

anode (+ve) cathode (–ve)

A colourless colourless

B colourless yellow-green

C yellow-green colourless

D yellow-green yellow-green

14 The diagram shows the reaction between zinc oxide and dilute hydrochloric acid.

dilutehydrochloric acid

20 °CpH 1

aqueouszinc chloride22 °CpH 7

before after

zinc oxide powder

Which terms describe the reaction?

endothermic neutralisation

A

B

C

D



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15 Four different gases are passed through the apparatus shown.

gas in gas out

damp redlitmus paper

damp bluelitmus paper

Which gas has no effect on either piece of litmus paper?

A ammonia

B carbon dioxide

C chlorine

D hydrogen

16 An aqueous solution of copper(II) sulfate was made by adding excess copper(II) oxide to dilutesulfuric acid. The mixture was heated, stirred and then filtered.

dilutesulfuric acid

copper(II) oxide

heat

copper(II) sulfatesolution

What was the pH of the acid before adding the copper(II) oxide and of the solution after filtration?

pH of acid before adding

copper(II) oxidepH of solutionafter filtration

A greater than 7 7

B greater than 7 less than 7

C less than 7 7

D less than 7 greater than 7



8

© UCLES 2012 0620/12/M/J/12

17 Aqueous potassium iodide is added to aqueous silver nitrate.

What are the colours of the final precipitate and solution?

precipitate solution

A brown colourless

B white yellow

C yellow colourless

D yellow white

18 Three gas jars contain carbon dioxide, hydrogen and oxygen, as shown.

carbon dioxide hydrogen oxygen

Which one of the following tests could be used to discover which gas is in each jar?

A a glowing splint

B a lighted splint

C damp blue litmus paper

D limewater

19 The diagram shows an outline of part of the Periodic Table.

X

Y Z

Which statement about elements X, Y and Z is not correct?

A All are metals.

B All conduct electricity.

C All form coloured compounds.

D All react with oxygen.



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20 Elements X, Y and Z are in Group VII of the Periodic Table.

X is a gas.

Y is less reactive than Z

Z is a red liquid.

When X, Y and Z are put in order of increasing proton number, which order is correct?

A X→ Y→ Z B X→ Z→ Y C Y→ X→ Z D Y→ Z→ X

21 Which properties of the element titanium, Ti, can be predicted from its position in the PeriodicTable?

can be usedas a catalyst

conducts electricitywhen solid

has low densityforms coloured

compounds

A

B

C

D

22 Five elements have proton numbers 10, 12, 14, 16 and 18.

What are the proton numbers of the three elements that form oxides?

A 10, 12 and 14

B 10, 14 and 18

C 12, 14 and 16

D 14, 16 and 18

23 Which statement about aluminium is not correct?

A It is resistant to corrosion.

B It is strong and has a high density.

C It is used in food containers.

D It is used in the manufacture of aircraft.



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© UCLES 2012 0620/12/M/J/12

24 Many metals are extracted from their ores by heating the metal oxide with carbon.

Which metal cannot be extracted using this method?

A aluminium

B copper

C iron

D zinc

25 A metal has the following properties.

● It does not react with cold water.

● It reacts with dilute hydrochloric acid.

● It cannot be extracted from its oxide using carbon.

Between which two metals in the reactivity series should it be placed?

A calcium and magnesium

B iron and copper

C magnesium and zinc

D zinc and iron

26 Which statements about the general properties of metals are correct?

1 conduct electricity when solid

2 form acidic oxides

3 high melting point

A 1 and 3 B 1 only C 2 and 3 D 2 only

27 Water for human use is treated by filtration then chlorination.

Which uses do not need water of this quality?

1 water for cooling in industry

2 water for flushing toilets in the home

3 water for drinking

A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only



11


28 Carbon monoxide is an air pollutant produced when petrol is burned in a car engine.

Why is carbon monoxide considered to be an air pollutant?

A It causes global warming.

B It causes the corrosion of buildings.

C It is a greenhouse gas.

D It is poisonous.

29 A new planet has been discovered and its atmosphere has been analysed.

atmosphere

planet

The table shows the composition of the atmosphere.

gas percentage by volume

carbon dioxide 4

nitrogen 72

oxygen 24

Which gases are present in the atmosphere of the planet in a higher percentage than they are inthe Earth’s atmosphere?

A carbon dioxide and oxygen

B carbon dioxide only

C nitrogen and oxygen

D nitrogen only

30 Acetylene, C2H2, is a hydrocarbon. When acetylene and oxygen react, the hot flame producedcan be used to weld steel.

Which statement is correct?

A Acetylene and oxygen react exothermically.

B Acetylene is saturated.

C Oxygen and steel react endothermically.

D Oxygen is a gaseous fuel.



12

© UCLES 2012 0620/12/M/J/12

31 Fertilisers are used to provide three elements needed to increase the yield of crops.

Which two compounds, when used together, would provide all three of these elements?

A ammonium nitrate and calcium phosphate

B ammonium nitrate and potassium sulfate

C potassium nitrate and calcium phosphate

D potassium nitrate and potassium sulfate

32 Carbon dioxide and methane are ‘greenhouse gases’ which contribute to global warming.

Which process does not increase global warming?

A burning fossil fuels

Bdecay of organic waste

C farming cattle for beef

D growing crops such as sugar cane

33 When coal and oil burn in power stations, the acidic gas sulfur dioxide is formed. Sulfur dioxide isremoved by absorbing it in a liquid sprayed down a tower.

tower

waste gases

(including sulfur dioxide)

liquid X

spray

What is liquid X?

A calcium hydroxide solution

B sodium chloride solution

C dilute hydrochloric acid

D water



13


34 The table shows bonds that are present and bonds that are not present in compound X.

bond

C–C

C=C

C–H

C–O

C=O

O–H

What type of compound is X?

A a carboxylic acid

B an alcohol

C an alkane

D an alkene

35 The diagram shows different fuels from which electricity can be generated.

electricity

coal

uraniumdiesel oil

Which box completes the diagram?

ammonia

A

bitumen

B

natural gas

C

steam

D



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© UCLES 2012 0620/12/M/J/12

36 The diagram shows apparatus used to separate petroleum into four fractions.

petroleum

on rock wool

heat

thermometer

water

fraction

Which fraction contains the smallest hydrocarbon molecules?

fraction boiling point range / °C

A up to 70

B 70 to 120

C 120 to 170

D over 170

37 Ethanol is a fuel used in cars. It can be made from petroleum.

C4H10 → C2H4 + C2H6 cracking

C2H4 + H2O → C2H5OH producing ethanol

C2H5OH + 3O2 → 2CO2 + 3H2O burning

Compounds of how many homologous series appear in these equations?

A 1 B 2 C 3 D 4



15

© UCLES 2012 0620/12/M/J/12

38 Butene is an alkene which is manufactured by cracking hydrocarbons.

H C

H

H

H

H

H H

H

C C C

Which hydrocarbon can be cracked to make butene?

A ethane, C2H6

B decane, C10H22

C methane, CH4

D propane, C3H8

39 Which substance does not produce carbon dioxide when it burns in oxygen?

A butane

B ethanol

C ethene

D hydrogen

40 Ethanol is an important chemical produced by the ……1…… of ……2…… .

Which words correctly complete gaps 1 and 2?

1 2

A combustion ethane

B combustion glucose

C fermentation ethane

D fermentation glucose



16

Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Everyreasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included, thepublisher will be pleased to make amends at the earliest possible opportunity.

University of Cambridge International Examinations is part of the Cambridge Assessment Group. Cambridge Assessment is the brand name of University of Cambridge Local Examinations Syndicate (UCLES), which is itself a department of the University of Cambridge.

© UCLES 2012 0620/12/M/J/12

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D A T A S H E E T

T h e P e r i o d i c T a b l e o f t h e E l e m e n t s

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