June 2000 - Paper 1

UNIVERSITY OF CAMBRIDGE LOCAL EXAMINATIONS SYNDICATE General Certificate of Education Ordinary Level

CHEMISTRY

5070/1

PAPER 1 Multiple Choice MAY/JUNE SESSION 2000

1 hour

Additional materials: Mathematical tables and/or calculator Multiple choice answer sheet Soft clean eraser Soft pencil (type B or HB is recommended)

TIME

1 hour

INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your name, Centre number and candidate number on the answer sheet in the spaces provided unless this has already been done for you. There are forty questions in this paper. Answer all questions. 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 separate answer sheet. Read very carefully the instructions on the answer sheet. INFORMATION FOR CANDIDATES 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. Mathematical tables are available. You may use a calculator. A copy of the Periodic Table is printed on page 16.

This question paper consists of 14 printed pages and 2 blank pages. SJF1393 QF06367/3 © UCLES 2000

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2 1

2

By which process does the smell of cooking spread to all the rooms in a house? A

decomposition

B

diffusion

C

displacement

D

distillation

Trichloroethane is a solvent used to remove grease from clothing. How, after use, is the solvent separated from the grease?

3

A

by chromatography

B

by crystallisation

C

by distillation

D

by filtration

The diagram shows a chromatogram of several inks.

black

blue

brown

green

red

Which statement is correct? A

Black ink can be made by mixing green, red and yellow inks.

B

Brown ink can be made by mixing blue and red inks.

C

Yellow ink can be used to make brown ink.

D

Yellow ink may be present in green ink.

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yellow

3 Which graph shows the temperature altering as steam at 110 °C is cooled to –10 °C?

time

5

C

temperature

temperature

B

temperature

A

time

D

temperature

4

time

time

Elements X, Y and Z are in the same period of the Periodic Table. X is a metal, Y is a non-metal and Z shows properties of both metals and non-metals. What is the order of increasing proton (atomic) number? lowest → highest

6

7

A

X

Y

Z

B

X

Z

Y

C

Y

Z

X

D

Z

Y

X

Which statement about an atom is true? A

All the elements have only one nucleon (mass) number.

B

The nucleon (mass) number can be less than the proton (atomic) number.

C

The nucleon (mass) number can equal the proton (atomic) number.

D

The number of neutrons never equals the number of electrons.

In which pair of substances is each substance a mixture? A

air; water

B

limewater; water

C

quicklime; limewater

D

sea water; air

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4 8

Elements X and Y react to form an ionic compound of formula XY. What could be the proton (atomic) numbers of X and Y? X

9

Y

A

3

8

B

6

8

C

8

16

D

12

16

Which of the following contains the same number of molecules as 9 g of water? A

2 g of hydrogen gas

B

14 g of nitrogen gas

C

32 g of oxygen gas

D

44 g of carbon dioxide

10 Calcium reacts with water as shown. Ca(s) + 2H2O(l) → Ca(OH)2(aq) + H2(g) What is the total mass of the solution that remains when 40 g of calcium reacts with 100 g of water? A

58 g

B

74 g

C

138 g

D

140 g

11 The diagram shows the apparatus used to electrolyse lead(II) bromide using inert electrodes.

lamp

lead(II) bromide

Why does the lamp light up only when the lead(II) bromide is melted? A

Bromine atoms in the lead(II) bromide are converted to ions when it is melted.

B

Electrons flow through the lead(II) bromide when it is melted.

C

The ions in lead(II) bromide are free to move only when the solid is melted.

D

There are no ions in solid lead(II) bromide. 5070/1 S00

5 12 The diagram shows the results of an electrolysis experiment using inert electrodes.

liquid X

–

+

Which of the following could be liquid X? A

aqueous copper(II) sulphate

B

concentrated hydrochloric acid

C

dilute sulphuric acid

D

ethanol

13 In an experiment, rods of copper and zinc are dipped into dilute sulphuric acid, with their top ends touching. Hydrogen bubbles collect around the copper rod. zinc rod

copper rod

hydrogen bubbles dilute sulphuric acid Which statement is correct about the experiment? A

Electrons flow from zinc to copper.

B

Copper reacts with the acid.

C

The zinc becomes coated with copper.

D

The zinc is less reactive than copper. 5070/1 S00

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6 14 Curve I is obtained by observing the decomposition of 100 cm3 of 1 mol/dm3 aqueous hydrogen peroxide, catalysed by manganese(IV) oxide. 2H2O2(aq) → 2H2O(l) + O2(g)

I I volume of oxygen formed Which alteration to the conditions will produce curve II? A

adding some 0.1 mol/dm3 aqueous hydrogen peroxide

B

lowering the temperature

C

using a better catalyst

D

using less manganese(IV) oxide

15 In which stage in the manufacture of pure silicon is silicon oxidised? A impure silicon(IV) oxide

heat with coke

B impure silicon

heat with chlorine

impure silicon(IV) chloride

C

distil

D pure silicon

heat with hydrogen

16 In which reaction does the oxidation state of iron remain unchanged? A

2Fe + 3Cl2 → 2FeCl3

B

2FeCl2 + Cl2 → 2FeCl3

C

Fe + 2FeCl3 → 3FeCl2

D

Fe2O3 + 6HCl → 2FeCl3 + 3H2O

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pure silicon(IV) chloride

7 17 A bee sting is acidic. Which household substance will neutralise a bee sting? A

damp bicarbonate of soda pH 8

B

damp common salt pH 7

C

lemon juice pH 5

D

vinegar pH 4

18 Which equation represents the neutralisation of dilute sulphuric acid by aqueous sodium hydroxide? → H2O(l)

A

H+ (aq) + OH–(aq)

B

H2SO4(aq) + 2OH–(aq) → SO42– (aq) + 2H2O(l)

C

2Na+(aq) + SO42– (aq)

→ Na2SO4(aq)

D

NaOH(aq) + H+(aq)

→ Na+(aq) + H2O(l)

19 The diagram shows some reactions of copper compounds. Which change is made by adding an acid?

D

malachite CuCO3

copper(II) sulphate CuSO4

C

A

copper(II) oxide CuO

copper Cu

B

20 Why does the colour of aqueous potassium bromide change when chlorine gas is bubbled into it? A

A compound is formed between chlorine and bromine.

B

A solution of potassium chloride is formed.

C

The chlorine oxidises bromide ions to bromine.

D

The potassium bromide is reduced. 5070/1 S00

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8 21 Which list contains three elements that all exist as diatomic molecules at room temperature? A

hydrogen, fluorine, neon

B

nitrogen, chlorine, neon

C

nitrogen, oxygen, fluorine

D

oxygen, chlorine, helium

22 Which statement shows that iron is a transition metal? A

Iron(II) sulphate crystals are green.

B

Iron(III) oxide is basic.

C

Iron rusts in moist air.

D

Iron reacts with dilute hydrochloric acid.

23 Which carbonate decomposes on heating to give a black solid and a colourless gas? A

calcium carbonate

B

copper(II) carbonate

C

sodium carbonate

D

zinc carbonate

24 Which substance is not an essential raw material in the extraction of iron in a blast furnace? A

air

B

coke

C

limestone

D

sand

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9 25 Three experiments to investigate the reactivities of three metals are shown.

chromium

manganese

chromium

aqueous nickel sulphate

aqueous nickel sulphate

result: nickel displaced

aqueous manganese(II) sulphate

nickel displaced

manganese not displaced

What is the correct order of reactivity for these three metals? most reactive

→

least reactive

A

chromium

manganese

nickel

B

manganese

chromium

nickel

C

manganese

nickel

chromium

D

nickel

chromium

manganese

26 Which element is liberated at a carbon cathode when aqueous sodium chloride is electrolysed? A

chlorine

B

hydrogen

C

oxygen

D

sodium

27 Which element reacts with oxygen to form a compound that is a gas at room temperature? A

magnesium

B

hydrogen

C

copper

D

carbon

28 Which ion reacts with aqueous ammonia to give a precipitate that dissolves in an excess of ammonia? A

Al3+(aq)

B

Fe2+(aq)

Fe3+(aq)

C

D

Zn2+(aq)

29 In which reaction does dilute sulphuric acid act as an oxidising agent? A

Zn + H2SO4 → ZnSO4 + H2

B

ZnO + H2SO4 → ZnSO4 + H2O

C

Zn(OH)2 + H2SO4 → ZnSO4 + 2H2O

D

ZnCO3 + H2SO4 → ZnSO4 + H2O + CO2

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10 30 Which of the following is composed of silicon dioxide? A

glass

B

mica

C

quartz

D

silicone plastic

31 The diagram shows, by percentages, the principal large-scale uses of chlorine. water treatment making epoxypropane 5% 7%

other uses 10% making other organic compounds

23% making chloroalkanes

11%

making PVC 20%

12% 12% making hydrogen chloride and domestic bleaches

bleaching woodpulp and paper

What is the total pecentage of chlorine used in making organic compounds? A

34%

B

54%

C

61%

D

73%

32 Which product is not manufactured using calcium carbonate? A

cement

B

chlorine

C

glass

D

iron

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11 33 Which pair of structures are isomers of each other?

A

H

H

H

C

C

H

H

H H

B

C

H

H

O H

C H

O

H

H

H

H

C

C

C

H

H

H

H

H

C

C

H

H

H

O

H

H

C

H

H

H

H

C

C

C

H

H

H

H D

O

H

H

H C

H

C

H

H

H

O

H

C

C

C

H

H

H

H

H

H

H

C

C

C

C

H

H

H

H

H

H

34 The diagrams show the structures of three hydrocarbons. H

H

H

H

H

C

C

C

H

H

H

H

H

H H

H H

C

C

C

C

H

H

H

H

H

H

H

H

H

C

C

C

C

H

H

H

H

H

Which statement is correct for all three compounds? A

They are isomers of each other.

B

They have the same general formula.

C

They have the same physical properties.

D

They react with aqueous bromine.

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12 35 The diagram represents an organic compound that contains three different elements.

What could be the compound? A

ethanoic acid

B

ethanol

C

propane

D

propene

36 Which of the following reacts with sodium carbonate to produce carbon dioxide?

A

H

H

H

C

C

H

H

H B

H

C

H

C O

H

H

H

C

C

C

H H

C H

H

H

H

D

H

O

H

C

O

O C O

H

H

C

C

H

H

H

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13 37 One mole of a hydrocarbon X reacted completely with one mole of hydrogen gas in the presence of a heated catalyst. What could be the formula of X? A

C2H6

B

C3H8

C

C5H10

D

C7H16

38 Nylon (a polyamide) and Terylene (a polyester) are both man-made fibres. Which type of reaction is used to produce both of these polymers? A

addition

B

condensation

C

fermentation

D

hydrolysis

39 A carbohydrate such as starch can be represented as follows. X

X

X

X

What is X? A

carbon

B

hydrogen

C

nitrogen

D

oxygen

40 Part of a polymer molecule has the following structure. ––CH2 ––CH2 ––CH2 ––CH2 ––CH2 ––CH2 –– From which substance is this polymer made? A

C2H4

B

C2H6

C

C3H6

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D

C3H8

14 BLANK PAGE

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15 BLANK PAGE

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Magnesium

Sodium

Calcium

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Strontium

89

Key

b

X

a

†

72

b = proton (atomic) number

X = atomic symbol

a = relative atomic mass

*58-71 Lanthanoid series †90-103 Actinoid series

88

Ac

Actinium

Ra

Radium

Fr

Francium

87

*

Hafnium

Lanthanum

57

178

Hf

40

Zirconium

Zr

91

Titanium

139

Yttrium

22

48

Ti

La

39

Y

89

Scandium

21

227

56

Barium

Caesium

45

Sc

226

55

137

Ba

133

Cs

38

Rubidium

37

88

Sr

85

Rb

20

Potassium

19

40

Ca

39

12

24

Mg

23

Na

Beryllium

4

Lithium

K

11

3

9

Be

7

II

Li

I

93

Ta

181

Niobium

Nb

90

58

73

52

96

Mo

W

184

Protactinium

Thorium

55

Tc 186

Re

144

Nd

92

60

Uranium

U

238

Neodymium

75

Rhenium

43

Technetium

25

Manganese

Mn 27

59

28

59

29

64

30

65

5

Ru

101

Iron

190

Pm

Osmium

Os

Np 93

Neptunium

61

Promethium

76

44

Ruthenium

26

56

Fe

Sm

150

Iridium

Pu 94

Plutonium

62

152

Eu

Am 95

Americium

63

Europium

78

Platinum

195

Pt

Ir

46

Palladium

Pd

106

Nickel

Ni

192

Samarium

77

45

Rhodium

Rh

103

Cobalt

Co

Gd

157

Gold

Au

197

Silver

96

64

Curium

Cm

Gadolinium

79

47

Ag

108

Copper

Cu

201

Bk

Terbium

Tb

159

Mercury

Hg

97

Berkelium

65

80

48

Cadmium

Cd

112

Zinc

Zn

11

6

Dy

162

Thallium

Tl

204

Indium

Cf 98

Californium

66

Es

Holmium

Ho

165

Lead

Pb

207

Tin

99

Einsteinium

67

82

50

119

Sn

115

32

Germanium

Ge

73

Silicon

In

Gallium

Dysprosium

81

49

31

70

Ga

14

28

Si

Carbon

27

Aluminium

13

12

C

Al

Boron

B 7

14

75

Sb

122

Arsenic

As

Bi

209

Fermium

Fm

Erbium

Er

167

Bismuth

100

68

83

51

Antimony

33

15

Phosphorus

P

31

Nitrogen

N 8

Se

79

Sulphur

S

32

Oxygen

Po

169

Md

Thulium

Tm

101

Mendelevium

69

84

Polonium

52

Tellurium

Te

128

Selenium

34

16

16

O 9

Yb

173

Astatine

At

Iodine

I

127

Bromine

Br

80

Chlorine

No 102

Nobelium

70

Ytterbium

85

53

35

17

Cl

35.5

Fluorine

F

19

Lr

Lutetium

Lu

175

Radon

Rn

Xenon

Xe

131

Krypton

Kr

84

Argon

Ar

40

Neon

103

Lawrencium

71

86

54

36

18

10

Ne

20

Helium

2

0

Hydrogen

VII

4

VI

He

V

1

IV

H

III

The volume of one mole of any gas is 24 dm3 at room temperature and pressure (r.t.p.).

91

Pa

Th

232

Praseodymium

Cerium

59

141

Pr

140

74

Tungsten

42

Molybdenum

24

Chromium

Cr

Ce

Tantalum

41

23

Vanadium

V

51

1

Group

DATA SHEET The Periodic Table of the Elements

16