8812-6104 12 pages

N12/4/CHEMI/SPM/ENG/TZ0/XX

Friday 9 November 2012 (afternoon)

CHEMISTRYSTandaRd lEvElPaPER 1

INSTRUCTIONS TO CANDIDATES

• Do not open this examination paper until instructed to do so.• Answer all the questions.• For each question, choose the answer you consider to be the best and indicate your choice on

the answer sheet provided.• The periodic table is provided for reference on page 2 of this examination paper.• The maximum mark for this examination paper is [30 marks].

45 minutes

© International Baccalaureate Organization 2012

88126104

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88 Ra

(226

)

56 Ba13

7.34

38 Sr87

.62

20 Ca

40.0

8

12 Mg

24.3

1

4 Be 9.012

‡†

89 ‡

Ac

(227

)

57 †

La13

8.91

39 Y88

.91

21 Sc 44.9

6

90 Th23

2.04

58 Ce

140.

12

72 Hf

178.

49

40 Zr 91.2

2

22 Ti47

.90

91 Pa23

1.04

59 Pr14

0.91

73 Ta18

0.95

41 Nb

92.9

1

23 V50

.94

92 U23

8.03

60 Nd

144.

24

74 W18

3.85

42 Mo

95.9

4

24 Cr

52.0

0

55 Cs

132.

91

37 Rb

85.4

7

19 K39

.10

11 Na

22.9

9

3 Li 6.941 H 1.011 Fr87 (223

)

Ato

mic

num

ber

Elem

ent

Rela

tive

atom

ic m

ass

93 Np

(237

)

61 Pm14

6.92

75 Re

186.

21

43 Tc 98.9

1

25 Mn

54.9

4

94 Pu (242

)

62 Sm15

0.35

76 Os

190.

21

44 Ru

101.

07

26 Fe 55.8

5

95 Am

(243

)

63 Eu15

1.96

77 Ir19

2.22

45 Rh

102.

91

27 Co

58.9

3

96 Cm

(247

)

64 Gd

157.

25

78 Pt19

5.09

46 Pd10

6.42

28 Ni

58.7

1

97 Bk (247

)

65 Tb15

8.92

79 Au

196.

97

47 Ag

107.

87

29 Cu

63.5

5

The

Peri

odic

Tab

le

98 Cf

(251

)

66 Dy

162.

50

80 Hg

200.

59

48 Cd

112.

40

30 Zn 65.3

7

99 Es (254

)

67 Ho

164.

93

81 Tl20

4.37

49 In11

4.82

31 Ga

69.7

2

13 Al

26.9

8

5 B10

.81

3

100

Fm (257

)

68 Er16

7.26

82 Pb20

7.19

50 Sn11

8.69

32 Ge

72.5

9

14 Si28

.09

6 C12

.01

4

101

Md

(258

)

69 Tm16

8.93

83 Bi20

8.98

51 Sb12

1.75

33 As

74.9

2

15 P30

.97

7 N14

.01

5

102

No

(259

)

70 Yb

173.

04

84 Po (210

)

52 Te12

7.60

34 Se78

.96

16 S32

.06

8 O16

.00

6

103

Lr (260

)

71 Lu17

4.97

85 At

(210

)

53 I12

6.90

35 Br 79.9

0

17 Cl

35.4

5

9 F19

.00

7

86 Rn

(222

)

54 Xe

131.

30

36 Kr

83.8

0

18 Ar

39.9

5

10 Ne

20.1

8

2 He

4.000

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1. Whatisthenumberofionsin0.20molof(NH4)3PO4?

A. 18.0 10−×

B. 231.2 10×

C. 234.8 10×

D. 242.4 10×

2. Whatisthemolarmass,ingmol–1,ofwashingsodacrystals,Na2CO3•10H2O?

A. 105.99

B. 124.00

C. 263.15

D. 286.19

3. Theequationforthereductionofiron(III)oxideis:

2 3 2Fe O (s) 3CO(g) 2Fe(s) 3CO (g)+ → +

Whatmassofcarbondioxide,ing,isproducedbythecompletereductionof80gofiron(III)oxide?

A. 44

B. 66

C. 88

D. 132

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4. 3.0dm3ofethyne,C2H2,ismixedwith3.0dm3ofhydrogenandignited.Theequationforthereaction

thatoccursisshownbelow.

2 2 2 2 6C H (g) 2H (g) C H (g)+ →

Assumingthereactiongoestocompletionandallgasvolumesaremeasuredatthesametemperatureandpressure,whatvolumeofethane,C2H6,indm

3,isformed?

A. 1.5

B. 2.0

C. 3.0

D. 6.0

5. Whatisthecorrectnumberofeachparticleinanoxygenion,18O2–?

Protons Neutrons Electrons

A. 8 8 10

B. 8 10 8

C. 8 8 6

D. 8 10 10

6. Whichstatementabouttheelectromagneticspectrumiscorrect?

A. Infraredlighthasashorterwavelengththanultravioletlight.

B. Visiblelighthasashorterwavelengththanultravioletlight.

C. Thefrequencyofvisiblelightishigherthanthefrequencyofinfraredlight.

D. Theenergyofinfraredlightishigherthantheenergyofvisiblelight.

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7. Whichstatementsaboutatomicstructureandtheperiodictablearecorrect?

I. Anelementingroup2has2electronsinitsvalence(outer)energylevel.

II. Anelementinperiod3haselectronsin3energylevels.

III. Theelementingroup2andperiod3hasanatomicnumberof12.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

8. WhichcombinationiscorrectforthepropertiesofthealkalimetalsfromLitoCs?

Atomic radius Melting point First ionization energy

A. increases increases increases

B. increases decreases decreases

C. increases increases decreases

D. decreases decreases increases

9. Whichoxidesareacidic?

I. P4O10

II. SO3

III. Na2O

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

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10. Whatistheformulaoftheioniccompoundformedwhencalciumandnitrogenreacttogether?

A. Ca2N3

B. Ca3N2

C. Ca5N2

D. Ca2N5

11. Whichbondistheleastpolar?

A. C–H

B. F–H

C. O–H

D. N–H

12. Diamond,C60fullereneandgraphiteareallotropesofcarbon.Whichstatementsarecorrectabouttheseallotropes?

I. Indiamondeachcarbonisheldinatetrahedralarrangement.

II. InC60fullereneeachcarbonisheldinatrigonalarrangement.

III. Ingraphiteeachcarbonisheldinatetrahedralarrangement.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

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13. Whichstatementaboutthephysicalpropertiesofsubstancesiscorrect?

A. Theonlysolidsthatconductelectricityaremetals.

B. Allsubstanceswithcovalentbondshavelowmeltingpoints.

C. Ionicsolidsarealwaysbrittle.

D. Allmetalshavehighdensities.

14. Which combination is correct for the exothermic reaction that occurs between zinc and coppersulfatesolution.

Temperature of solution

Heat released to surroundings

Enthalpy of products greater than enthalpy of reactants

A. increases yes yes

B. decreases no no

C. increases yes no

D. decreases no yes

15. A5.00gsampleofasubstancewasheatedfrom 25.0 C° to 35.0 C° using 22.00 10 J× ofenergy.WhatisthespecificheatcapacityofthesubstanceinJg–1K–1?

A. 34.00 10−×

B. 12.50 10−×

C. 2.00

D. 4.00

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16. Usingtheequationsbelow:

2 2C(s) O (g) CO (g)+ → 390 kJH∆ = −Ö

12 2 22H (g) O (g) H O(l)+ → 286 kJH∆ = −Ö

4 2 2 2CH (g) 2O (g) CO (g) 2H O(l)+ → + 890 kJH∆ = −Ö

whatis H∆ Ö,inkJ,forthefollowingreaction?

2 4C(s) 2H (g) CH (g)+ →

A. –214

B. –72

C. +72

D. +214

17. Whichpieceofequipmentcouldnotbeusedinanexperimenttomeasuretherateofthisreaction?

3 3 2 3 2CH COCH (aq) I (aq) CH COCH I(aq) H (aq) I (aq)+ −+ → + +

A. Acolorimeter

B. Agassyringe

C. Astopwatch

D. ApHmeter

18. Inwhich flaskwill the reaction between 2.0g ofmagnesium carbonate and 25cm3 1.0moldm–3

hydrochloricacidoccurmostrapidly?

A B C D

Largepellets25 C°

Largepellets50 C°

Smallpellets25 C°

Smallpellets50 C°

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19. Considerthefollowingreaction:

2A C� Kc=1.1

Whichstatementiscorrectwhenthereactionisatequilibrium?

A. [A]>>[C]

B. [A]>[C]

C. [A]=[C]

D. [A]<[C]

20. Iron(III)ions,Fe3+,reactwiththiocyanateions,SCN–,inareversiblereactiontoformaredsolution.Whichchangestotheequilibriumwillmakethesolutiongored?

3 2Fe (aq) SCN (aq) [FeSCN] (aq) veH+ − ++ ∆ = +� Ö

Yellow Red

I. Increasingthetemperature

II. AddingFeCl3III. Addingacatalyst

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

21. WhichsubstancecanactasaLewisacidbutnotasaBrønsted–Lowryacid?

A. HCl

B. CH3COOH

C. BF3

D. CF3COOH

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22. Whichrowcorrectlydescribes1.0moldm–3NaOH(aq)?

pH Colour in universal indicator solution

Electrical conductivity

A. 14 purple good

B. 10 green poor

C. 14 red good

D. 10 blue poor

23. WhatisthecorrectsystematicnameofMnO2?

A. Manganese(II)oxide

B. Manganese(IV)oxide

C. Magnesium(II)oxide

D. Magnesium(IV)oxide

24. Avoltaiccellismadebyconnectingzincandleadhalf-cells.Theoverallequationforthereactionoccurringinthecellisshownbelow.

2 2Zn (s) Pb (aq) Pb (s) Zn (aq)+ ++ → +

Whichstatementsarecorrectwhenthecellproduceselectricity?

I. Thezincisoxidized.

II. Electronsmovefromzinctoleadintheexternalcircuit.

III. Themassoftheleadelectrodeincreases.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

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25. Whichprocessoccursduringtheelectrolysisofmoltensodiumchloride?

A. Oxidationoccursatthepositiveelectrode(anode).

B. Electronsmovethroughtheelectrolyte.

C. Sodiumionsmovethroughtheelectrolytetothepositiveelectrode(anode).

D. Chlorideionsmovethroughtheelectrolyteandarereducedatthenegativeelectrode(cathode).

26. Whichstatementaboutahomologousseriesiscorrect?

A. MembersoftheseriesdifferbyCH3.

B. Membersoftheserieshavethesamephysicalproperties.

C. Membersoftheserieshavethesameempiricalformula.

D. Membersoftheserieshavesimilarchemicalproperties.

27. Whichcompoundisnotanisomerofhexane?

A. CH3CH(CH3)CH2CH2CH3B. CH3CHCHCH2CH2CH3C. (CH3)3CCH2CH3D. CH3CH2CH(CH3)CH2CH3

28. Whichcompoundwoulddecolourizebrominewaterinthedark?

A. CH3COCH2CH3

B. CH3(CH2)4OH

C. CH3CHCHCH3

D. CH3(CH2)3CH3

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29. Somemethanegasisburnedinalimitedsupplyofoxygen.Whichproductscouldform?

I. C(s)

II. CO(g)

III. CO2(g)

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

30. 50cm3 of copper(II) sulfate solution is measured into a plastic cup using a 100cm3 measuringcylinder. Excess zinc powder is added and the temperature rise that occurs is measuredwitha –10 C° to 110 C°+ thermometer. Theenthalpychangefor thereaction is thencalculated.Whichstatementiscorrect?

A. Systematic error will be reduced by repeating the experiment several times and averagingtheresults.

B. Randomerrorwillbereducedbyinsulatingtheplasticcup.

C. Random errorwill be reduced by using a 50cm3 graduated pipette instead of ameasuringcylinder.

D. Systematicerrorwillbeincreasedbyusingalargervolumeofcopper(II)sulfatesolution.