chemistry higher level paper 1 - ib documents

2213-6107 19 pages

M13/4/CHEMI/HPM/ENG/TZ1/XX

Thursday 16 May 2013 (afternoon)

CHEMISTRYHIGHER 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 [40 marks].

1 hour

© International Baccalaureate Organization 2013

22136107

2213-6107

–2– M13/4/CHEMI/HPM/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

2213-6107

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1. Whatisthewholenumberratioofthecoefficientsofammoniatooxygenwhenthefollowingequationisbalancedcorrectly?

3 2 2___ NH (g) ___O (g) ___ NO(g) ___ H O(l)+ → +

A. 1:2

B. 2:1

C. 4:5

D. 5:4

2. When50cm3ofahydrocarbon,CxHy,wasburnedinexcessoxygen,200cm3ofcarbondioxideand

250cm3ofsteamwereproduced(allvolumesweremeasuredunderthesameconditions).Whatisthemolecularformulaofthehydrocarbon?

A. C2H4

B. C3H8

C. C4H8

D. C4H10

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3. Whichgraph represents the relationshipbetweenvolumeandpressure for afixedmassof gas atconstanttemperature?

A. B.

V V

P P

C. D.

V V

P 1P

4. Whichdiagramshowsapatternsimilartotheemissionspectrumofhydrogen?

Increasingwavelength

A.

B.

C.

D.

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5. WhatisthecorrectelectronconfigurationoftheCu+ion?

A. [Ar]3d94s1

B. [Ar]3d74s2

C. [Ar]3d10

D. [Ar]3d84s1

6. Whichstatementconcerningelectronegativityiscorrect?

A. Electronegativityincreasesfromlefttorightacrossaperiod.

B. Metalsgenerallyhavehigherelectronegativityvaluesthannon-metals.

C. Electronegativityincreasesondescendingagroup.

D. Noblegaseshavethehighestelectronegativityvalues.

7. Whichstatementsarecorrect?

I. Fluorinewillreactwithpotassiumchloridesolutiontoproducechlorine.

II. Iodinewillreactwithsodiumchloridesolutiontoproducechlorine.

III. Brominewillreactwithlithiumiodidesolutiontoproduceiodine.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

2213-6107


8. Eachofthefollowingoxidesisaddedtoseparateequalvolumesofdistilledwater. Whichofthefollowingisthemostacidicoxide?

A. P4O10

B. SO3

C. Cl2O7

D. SiO2

9. Whatarethecorrectformulasofthefollowingions?

Nitrate Sulfate Phosphate Hydrogencarbonate

A. NO3– SO4

2– PO43– HCO3

–

B. NO3– SO4

2– PO33– HCO3

2–

C. NO2– SO4

– PO43– HCO3

–

D. NO2– SO3

2– PO33– HCO3

2–

10. Whichcompoundispredominantlycovalent?

A. LiCl

B. Al2O3

C. ClF

D. ZnCl2

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11. Whichcombinationbestdescribesthetypeofbondingpresentandthemeltingpointofsiliconandsilicondioxide?

Silicon Silicon dioxide

A. covalentbonding highmeltingpoint covalentbonding highmeltingpoint

B. metallicbonding highmeltingpoint covalentbonding lowmeltingpoint

C. ionicbonding highmeltingpoint ionicbonding lowmeltingpoint

D. covalentbonding lowmeltingpoint ionicbonding highmeltingpoint

12. Whichspecieshasasquareplanarshape?

A. B.

C

F

F

FF S

F

F

FF

C. D.

B

F

F

FF

– –

Cl

F

F

FF

2213-6107


13. Whatarethehybridizationsoftheatomslabelled1,2and3inthemoleculebelow?

H3C C

O

O H1 2 3

1 2 3

A. sp2 sp2 sp

B. sp3 sp2 sp3

C. sp2 sp sp3

D. sp3 sp2 sp

14. Whichstatementiscorrectfortheenthalpyleveldiagramshown?

Enthalpy

Time

A. Thereactionisexothermicandtheproductsaremorestablethanthereactants.

B. Thereactionisexothermicandthesignoftheenthalpychangeispositive.

C. Thereactionisendothermicandthesignoftheenthalpychangeisnegative.

D. Thereactionisendothermicandtheproductsaremorestablethanthereactants.

Enthalpyofreactants

Enthalpyofproducts

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15. Whichprocessisendothermic?

A. 4 10 2 2 22C H (g) 13O (g) 8CO (g) 10H O(g)+ → +

B. –Na (g) Na (g) e+→ +

C. 2 4 2 4 2H SO (aq) 2KOH(aq) K SO (aq) 2H O(l)+ → +

D. 3 3NH (g) NH (l)→

16. Whichcombinationofionswillgivethegreatestabsolutelatticeenthalpy?

A. Asmallpositiveionwithahighchargeandasmallnegativeionwithahighcharge

B. Asmallpositiveionwithalowchargeandasmallnegativeionwithalowcharge

C. Alargepositiveionwithahighchargeandalargenegativeionwithahighcharge

D. Alargepositiveionwithalowchargeandasmallnegativeionwithalowcharge

17. Whichprocesswouldbeexpectedtohavea SÖë valuewhichisnegative?

A. 2 2 22H (g) O (g) 2H O(g)+ →

B. –NaCl (s) Na (g) Cl (g)+→ +

C. 2 2H (g) I (g) 2HI (g)+ →

D. 2 2 2OF (g) H O(g) O (g) 2HF(g)+ → +

18. Whensolidpotassiumchlorate,KClO3,dissolvesindistilledwaterthetemperatureofthesolutiondecreases.Whatarethesignsof H Öë , SÖë and GÖë forthisspontaneousprocess?

ÖëH ÖëS ÖëG

A. + + +

B. + + –

C. – – –

D. + – +

2213-6107


19. WhichgraphbestrepresentstherelationshipbetweentheaveragekineticenergyofmoleculesofagasandtemperatureinK?

A. B.

Averagekineticenergy


Temperature/K Temperature/K

C. D.



Temperature/K Temperature/K

20. Forthegasphasereaction:

A(g) B(g) C(g)+ →

theexperimentallydeterminedrateexpressionis:rate=k[A][B]2

BywhatfactorwilltheratechangeiftheconcentrationofAistripledandtheconcentrationofBishalved?

A. 0.75

B. 1.5

C. 6

D. 12

2213-6107

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21. Whichgraphbestrepresentsasecond-orderreaction?

A. B.Concentration

ofreactant

Concentration

ofreactant

Time Time

C. D.

Concentration

ofreactant

Concentration

ofreactant

Time Time

22. Whichchangesoccurwhenthetemperatureisdecreasedinthefollowingequilibrium?

2 22BrCl (g) Br (g) Cl (g)+� –14kJH =Öë

Position of equilibrium Value of Kc

A. shiftstotheright decreases

B. shiftstotheright increases

C. shiftstotheleft decreases

D. shiftstotheleft increases

2213-6107


23. Whengaseousnitrosylchloride,NOCl(g),decomposes,thefollowingequilibriumisestablished:

22NOCl(g) 2NO(g) Cl (g)+�

2.0mol of NOCl(g) were placed in a 1.0dm3 container and allowed to reach equilibrium.Atequilibrium1.0molofNOCl(g)waspresent.WhatisthevalueofKc?

A. 0.50

B. 1.0

C. 1.5

D. 2.0

24. Inwhichequilibriaaretheconjugateacid–basepairscorrectlylabelled?

I. 2– – –3 2 3CO (aq) H O(l) HCO (aq) OH (aq)+ +�

Base1 Acid2 Acid1 Base2

II. – –3 2 2 3HCO (aq) H O(l) H CO (aq) OH (aq)+ +�

Base1 Acid2 Acid1 Base2

III. 4 2 3 3NH (aq) H O(l) H O (aq) NH (aq)+ ++ +�

Acid1 Base2 Acid2 Base1

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

2213-6107

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25. AsolutionofacidHXhasapH=1andasolutionofacidHYhasapH=3.Whichstatementmust becorrect?

A. HXisastrongeracidthanHY.

B. HYisastrongeracidthanHX.

C. The[H+]inthesolutionofHXis100timesgreaterthanthe[H+]inthesolutionofHY.

D. The[H+]inthesolutionofHYis100timesgreaterthanthe[H+]inthesolutionofHX.

26. ThevaluesofKw,theionicproductconstantofwater,are:

Kw

6.4×10–15 181.0×10–14 25

Whichstatementsarecorrect?

I. The[OH–]inwaterislessthanthe[H+]at18 C° .

II. Theionizationofwaterisanendothermicprocess.

III. ThepHofwaterislowerat25 C° thanat18 C° .

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

T / C°

2213-6107


27. Forwhichequilibriumcananexpressionforabasedissociationconstant,Kb,fortheforwardreactionbewritten?

A. 3 3 4 2NH H O NH H O+ ++ +�

B. –2F H O HF OH− + +�

C. –4 3 2NH OH NH H O+ + +�

D. – –2HF OH H O F+ +�

28. Whichofthefollowingmixtures,inanaqueoussolution,willproduceabuffersolution?

I. 50cm3of0.1moldm–3CH3COONaand50cm3of0.1moldm–3CH3COOH

II. 50cm3of0.1moldm–3NH3and50cm3of0.1moldm–3NH4Cl

III. 50cm3of0.1moldm–3NaOHand50cm3of0.2moldm–3CH3COOH

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

2213-6107

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29. Thecoloursofthreeindicatorsareshowninthetablebelow.

Indicator Colour at low pH

Colour at high pH

pH range at which colour change takes place

methylorange red yellow 3.2– 4.4

bromothymolblue yellow blue 6.0 –7.6

phenolphthalein colourless pink 8.2–10.0

Equal volumes of these three indicatorsweremixed and themixturewas added to a solution ofpH=5.0.Whatcolourwouldbeseen?

A. Yellow

B. Orange

C. Green

D. Blue

30. Whichstatementiscorrectaboutareducingagent?

A. Itisreducedbygainingelectrons.

B. Itisoxidizedbygainingelectrons.

C. Itisoxidizedbylosingelectrons.

D. Itisreducedbylosingelectrons.

31. Anaqueoussolutionofametalsaltiselectrolysed.Whichfactorwillhavenoeffectonthemassofthemetaldepositedonthenegativeelectrode(cathode),ifallothervariablesremainconstant?

A. Sizeofmetalion

B. Relativeatomicmassofmetal

C. Current

D. Chargeonmetalion

2213-6107


32. Whicharecorrectstatementsaboutavoltaiccell?

I. Aspontaneousredoxreactionoccurswhichconvertschemicalenergytoelectricalenergy.

II. Oxidationoccursatthenegativeelectrode(anode).

III. Electricityisconductedbythemovementofelectronsthroughthesaltbridge.

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

33. Thestandardelectrodepotentialsofsomehalf-reactionsaregivenbelow.

4 – 2Sn (aq) 2e Sn (aq)+ ++ � 0.15 VE = +Ö

– –1

22 I (s) e I (aq)+ � 0.54 VE = +Ö

3 – 2Fe (aq) e Fe (aq)+ ++ � 0.77 VE = +Ö

Whichofthefollowingreactionswilloccurspontaneously?

A. IodinereducesFe3+toFe2+

B. IodinereducesSn4+toSn2+

C. IodineoxidizesFe2+toFe3+

D. IodineoxidizesSn2+toSn4+

2213-6107

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34. WhatisthenameofthefollowingcompoundapplyingIUPACrules?

A. cis-4-methylhex-2-ene

B. cis-4-ethylpent-2-ene

C. trans-4-methylhex-2-ene

D. trans-4-ethylpent-2-ene

35. Whichstepsareinvolvedinthefree-radicalmechanismofthebrominationofethaneinthepresenceofultravioletradiation?

I. 2 6 2 5C H Br C H HBr+ → +i i

II. 2 5 2 2 5C H Br C H Br Br+ → +i i

III. 2 5 2 5C H Br C H Br+ →i i

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

C

H

H

H

H H

HH

HH

HH

H

H

H

C

C C

CC C

2213-6107


36. Whichsubstancecanbepolymerizedtoproducethepolymerbelow?

C

CH3

H

C

H

H

C

H

CH3

C

H

H

C

CH3

H

C

H

H

C

H

C

H

HCH3

A. But-1-ene

B. But-2-ene

C. Propene

D. 2-methylpropene

37. Whichfactorsaffecttherateofnucleophilicsubstitutioninhalogenoalkanes?

I. Thenatureoftheattackingnucleophile

II. Theidentityofthehalogen

III. Thestructureofthehalogenoalkane

A. IandIIonly

B. IandIIIonly

C. IIandIIIonly

D. I,IIandIII

38. Whichmoleculeexhibitsopticalisomerism?

A. 3-chloropentane

B. 2-chlorobutane

C. 1,3-dichloropropane

D. 2-chloro-2-methylpropane

2213-6107


39. Whatisauseoftheorganicproductformedwhenanalcoholandacarboxylicacidreacttogether?

A. Pesticide

B. Lubricant

C. Flavouringsinfood

D. Fertilizer

40. Which would be the best method to decrease the random uncertainty of a measurement in anacid–basetitration?

A. Ensureyoureyeisatthesameheightasthemeniscuswhenreadingtheburette.

B. Useadifferentindicatorforthetitration.

C. Useadifferentburette.

D. Repeatthetitration.

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