Mock IGCSE Sample Examination Paper CHEMISTRY PAPER 1 ...

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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.

© OUP: this may be reproduced for class use solely for the purchaser’s institute

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 © OUP: this may be reproduced for class use solely for the purchaser’s institute

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


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


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


6 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


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


8 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


9 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


10 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.


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
