CHEMISTRY STANDARD LEVEL PAPER 1 - ibdocuments.com PAST PAPERS - SUBJECT/Group 4 - Sciences/Chemistry_SL...2212-6110 – 5 – Turn over. M12/4/CHEMI/SPM/ENG/TZ1/XX. 7. An16O atom,

2212-6110 15 pages

M12/4/CHEMI/SPM/ENG/TZ1/XX

Tuesday 8 May 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

22126110

2212-6110

–2– M12/4/CHEMI/SPM/ENG/TZ1/XX

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. Howmanyatomsofhydrogenarein0.500molofCH3OHmolecules?

A. 231.20 10×

B. 233.01 10×

C. 236.02 10×

D. 241.20 10×

2. 1molofahydrocarbonwithgeneralformulaCnH2n+2reactscompletelywithoxygentoproduce4molofH2O.Whatistheamountofoxygenmolecules,inmol,thatreacts?

A. 4

B. 5

C. 6

D. 7

3. Underwhichcombinationofconditionsis1molofanidealgaspresent?

Volume Pressure Temperature

A. 22.4dm3 101Pa 273K

B. 22.4m3 101Pa 298K

C. 22.4dm3 101kPa 273K

D. 22.4m3 101kPa 298K

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4. Afixedmassofanidealgasat27.0 C° and 51.01 10× Pahasavolumeof100cm3. Whichchangedoublesthevolumeofthegas?

A. Heatingthegasatconstantpressureto54.0 C° .

B. Heatingthegasatconstantpressureto327 C° .

C. Increasingthepressureonthegasto 52.02 10× Paatconstanttemperature.

D. Heatingthegasto54.0 C° andincreasingthepressureto 52.02 10× Pa.

5. 10cm3ofasolutionof1.0moldm–3NaOH(aq)isdilutedwithwateruntilthefinalvolumeis100cm3.Whatistheconcentration,inmoldm–3,ofthenewsolution?

A. 0.10

B. 1.0

C. 10.0

D. 0.01

6. Whichisotopehasanatomicnumberof9andamassnumberof19?

A. 9F

B. 19K

C. 19F

D. 28Si

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7. An16Oatom,an16O+ionandan18O+ion,alltravellingatthesamevelocity,enterintothemagneticfieldofamassspectrometer.Whichisthepathofeachoftheparticles?

16O 16O+ 18O+

A. X Y Z

B. Y Z X

C. X Z Y

D. Z X Y

8. Whichsequenceofelementsisinorderofincreasingelectronegativity?

A. Li<Na<Rb

B. O<N<C

C. F<Cl<Br

D. Si<P<S

9. Whichcombinationofdescriptionsiscorrectfortheoxidesofperiod3elements?

Chlorine Magnesium Silicon Sodium

A. basic acidic basic acidic

B. acidic basic basic basic

C. basic acidic acidic acidic

D. acidic basic acidic basic

X

YZ

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10. Whichsubstancehasthegreatestbondlengthbetweenthecarbonatoms?

A. C2H2

B. C2H4

C. C2H6

D. C2Cl4

11. Whichsubstancehasahighmeltingpointandconductselectriccurrentinthesolidstate?

A. Potassium

B. Potassiumchloride

C. Graphite

D. Silicondioxide

12. Whichstatementaboutintermolecularforcesiscorrect?

A. The intermolecular force between H2 molecules is hydrogen bonding, because H2 hastemporarydipoles.

B. TheintermolecularforcesbetweenPH3moleculesaregreater than the intermolecularforcesbetweenNH3molecules,becausetheyhaveagreatermass.

C. TheintermolecularforcebetweenH2moleculesishydrogenbonding,becauseH2haspermanentdipoles.

D. The intermolecular forces between Br2 molecules are van der Waals’, because Br2 hastemporarydipoles.

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13. Whichsubstancesaresolubleinhexane,C6H14?

I. C8H18

II. CH4

III. H2O

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

14. Whataretheunitsforspecificheatcapacity?

A. kJkgK

B. kJkgK–1

C. kJkg–1K

D. kJkg–1K–1

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15. Ineachoftwodifferentexperiments,AandB,asolutionofsodiumhydroxideisaddedtoasolutionofhydrochloricacid.Theinitialtemperatureofeachsolutionis25 C° .

ExperimentA ExperimentB

Whichstatementiscorrect?

A. ThehighestrecordedtemperatureofexperimentAislowerthanthehighestrecordedtemperatureofexperimentB.

B. Thehighestrecordedtemperatureofbothexperimentsisequal.

C. TheheatproducedinexperimentAislowerthantheheatproducedinexperimentB.

D. Theheatproducedinbothexperimentsisequal.

16. Theenthalpychanges,inkJ,forthefollowingtworeactionsarexandy.

2 4 2 4 2 22N H (l) N O (l) 3N (g) 4H O(g)+ → +

H x=Öë

2 4 2 2 2N H (l) O (g) N (g) 2H O(g)+ → + H y=Öë

Whatistheenthalpychange,inkJ,forthereaction?

2 4 2 2 4 2N H (l) 3O (g) N O (l) 2H O(g)+ → +

A. x–y

B. y–x

C. 3x–y

D. 3y–x

50cm3

1.0moldm–3NaOH(aq)50cm3

1.0moldm–3NaOH(aq)

50cm3

1.0moldm–3HCl(aq)100cm3

1.0moldm–3HCl(aq)

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–9–

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17. Identicalpiecesofcalciumcarbonateareaddedtotwoseparateflaskscontainingexcess0.1moldm–3

hydrochloricacidatdifferenttemperatures.Themassesofthecontentsoftheflasksaremonitored.Whichgraphrepresentsthereactionatthehighertemperature?

A.

Masso

fcontentso

fflask/g

B.

Masso

fcontentso

fflask/g

0 2 4 6 0 2 4 6Time/min Time/min

C.

Masso

fcontentso

fflask/g

D.Masso

fcontentso

fflask/g

0 2 4 6 0 2 4 6Time/min Time/min

50454035302520151050

50454035302520151050

50454035302520151050

50454035302520151050

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18. TheMaxwell–Boltzmanncurvebelowshowsthedistributionofkineticenergiesfortheparticlesinasampleofgas.

Numberofparticles

KineticEnergy

Whichistheshapeofthecurveforthesamesampleofgasatahighertemperature?Allgraphsaredrawntothesamescale.

A. Numberofparticles

B. Numberofparticles

KineticEnergy KineticEnergy

C. Numberofparticles

D. Numberofparticles

KineticEnergy KineticEnergy

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19. Thegraphrepresentstheratesoftheforwardandbackwardreactionsofareversiblereaction.

Rateofreaction

Time

Whichstatementiscorrect?

A. XWZrepresentstherateoftheforwardreaction.

B. AtY,therateoftheforwardandbackwardreactionsiszero.

C. BetweenWandZ,theconcentrationsofproductsandreactantsareequal.

D. BetweenYandW,theconcentrationofthereactantsincreases.

20. TheproductionofsulfuricacidbytheContactprocessinvolvesthefollowingequilibrium.

12 2 32SO (g) O (g) 2SO (g) 196 kJmolH −+ = −

Öë

Whichstatementabouttheprocessiscorrect?

A. Anincreaseintemperaturewouldshifttheequilibriumtotheright.

B. Anincreaseintemperaturewouldincreasetherateofreaction.

C. Thepresenceofacatalystwouldshifttheequilibriumtotheright.

D. Anincreaseinpressurewouldshifttheequilibriumtotheleft.

X

W Z

Y

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21. Whichareconjugateacid/basepairsaccordingtotheBrønsted–Lowrytheory?

I. NH4+/NH3

II. HCOOH/HCOO–

III. H2SO4/SO42–

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

22. 10cm3 ofNaOH solution is dilutedwith an equal volume ofwater. Which shows correctly thechangesintheconcentrationofhydroxideionsandthepH?

[OH–] pH

A. increases increases

B. increases decreases

C. decreases increases

D. decreases decreases

23. Whataretheoxidationnumbersofsulfurinthespeciesbelow?

SO32– NaHSO4 H2S

A. +2 +6 +2

B. +6 +4 +2

C. +4 +6 –2

D. +6 +2 –2

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–13–

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24. Theequationfortheredoxreactionbetweenacidifieddichromateandiodideionsisshownbelow.

2– – 32 7 2 2Cr O (aq) 6I (aq) 14H (aq) 2Cr (aq) 3I (aq) 7H O(l)+ ++ + → + +

Whichisthereductionhalf-equation?

A. –26I (aq) 6e 3I (aq)−+ →

B. –26I (aq) 3I (aq) 6e−→ +

C. 2– 32 7 2Cr O (aq) 14H (aq) 6e 2Cr (aq) 7H O(l)+ − ++ + → +

D. 2– 32 7 2Cr O (aq) 14H (aq) 2Cr (aq) 7H O(l) 6e+ + −+ → + +

25. Theequationfortheoverallreactioninavoltaiccellis:

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

Whichstatementsarecorrectforthiscell?

I. Cuisthepositiveelectrode.

II. Negativeionsflowfromthezincsolutiontothecoppersolution.

III. Chemicalenergyisconvertedintoelectricalenergyduringthisreaction.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

26. HowmanyisomershavethemolecularformulaC5H12?

A. 2 B. 3

C. 4

D. 5

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27. Whichfunctionalgroupsarepresentinthismolecule?

COOC H㌀

CH ㌀

A. Esterandmethyl

B. Ketoneandmethyl

C. Benzeneringandester

D. Benzeneringandketone

28. Whichreactionofbut-2-eneproduces2-chlorobutane?

A. Additionreactionwithchlorine B. Substitutionreactionwithhydrogenchloride

C. Substitutionreactionwithchlorine

D. Additionreactionwithhydrogenchloride

29. Whatarethecorrectnamesofthereactiontypesshown?

3 2 3 2 2 3 2 2 3CH CH CH ClCH CH CH HOCH CH CH→ →I II

I II

A. nucleophilicsubstitution oxidation

B. free-radicalsubstitution oxidation

C. nucleophilicsubstitution nucleophilicsubstitution

D. free-radicalsubstitution nucleophilicsubstitution

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30. Astudentmeasured themassofasolidonananalyticalbalanceduringan internallyassessed IBpracticalexperimentandrecordedthemassinhisrawdata.Theaccuracyofthebalance,asstatedbythemanufacturers,was±0.01g. Whichof thefollowingchoiceswouldbe thebest recordofhismass?

A. 10.2g B. 10g

C. 10.20g

D. 10.200g

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CHEMISTRY STANDARD LEVEL PAPER 1 - ibdocuments.com PAST PAPERS - SUBJECT/Group 4 - Sciences/Chemistry_SL...2212-6110 – 5 – Turn over. M12/4/CHEMI/SPM/ENG/TZ1/XX. 7. An16O atom,